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HomeMy WebLinkAbout11-19-2024 Regular Council Meeting Agenda PacketMARANA AZ ESTABLISHED 1 9 7 7 MARANA TOWN COUNCIL REGULAR COUNCIL MEETING NOTICE AND AGENDA 11555 W. Civic Center Drive, Marana, Arizona 85653 Council Chambers, November 19, 2024, at or after 6:00 PM Ed Honea, Mayor Jon Post, Vice Mayor Patrick Cavanaugh, Council Member Patti Comerford, Council Member Herb Kai, Council Member John Officer, Council Member Roxanne Ziegler, Council Member Pursuant to A.R.S. §38-431.02, notice is hereby given to the members of the Marana Town Council and to the general public that the Town Council will hold a meeting open to the public on November 19, 2024, at or after 6:00 PM located in the Council Chambers of the Marana Municipal Complex, 11555 W. Civic Center Drive, Marana, Arizona. ACTION MAY BE TAKEN BY THE COUNCIL ON ANY ITEM LISTED ON THIS AGENDA. Revisions to the agenda can occur up to 24 hours prior to the meeting. Revised agenda items appear in italics. As a courtesy to others, please turn off or put in silent mode all electronic devices. Meeting Times Welcome to this Marana Town Council meeting. Regular Council meetings are usually held the first and third Tuesday of each month at 6:00 PM at the Marana Municipal Complex, although the date or time may change and additional meetings may be called at other times and/or places. Contact the Town Clerk or watch for posted agendas for other meetings. This agenda may be revised up to 24 hours prior to the meeting. In such a case a new agenda will be posted in place of this agenda. Speaking at Meetings If you are interested in speaking to the Council during the Call to the Public or Public Hearings, you must fill out a speaker card (located in the lobby outside the Council Chambers) and deliver it to the Town Clerk prior to the convening of the meeting. Marana Town Council Regular Meeting Agenda Packet Page 1 of 395 November 19, 2024 All persons attending the Council meeting, whether speaking to the Council or not, are expected to observe the Council rules, as well as the rules of politeness, propriety, decorum and good conduct. Any person interfering with the meeting in any way, or acting rudely or loudly will be removed from the meeting and will not be allowed to return. Accessibility To better serve the citizens of Marana and others attending our meetings, the Council Chambers are wheelchair and handicapped accessible. Persons with a disability may request a reasonable accommodation, such as a sign language interpreter, by contacting the Town Clerk at (520) 382-1999. Requests should be made as early as possible to arrange the accommodation. Agendas Copies of the agenda are available the day of the meeting in the lobby outside the Council Chambers or online at www.maranaaz.gov under Agendas and Minutes. For questions about the Council meetings, special services or procedures, please contact the Town Clerk, at (520) 382-1999, Monday through Friday from 8:00 AM to 5:00 PM. This Notice and Agenda Posted no later than 24 hours prior to the meeting, at the Marana Municipal Complex, 11555 W. Civic Center Drive, the Marana Operations Center, 5100 W. Ina Road, and at www.maranaaz.gov under Agendas and Minutes. REGULAR COUNCIL MEETING CALL TO ORDER AND ROLL CALL PLEDGE OF ALLEGIANCE/INVOCATION/MOMENT OF SILENCE APPROVAL OF AGENDA CALL TO THE PUBLIC At this time any member of the public is allowed to address the Town Council on any issue within the jurisdiction of the Town Council, except for items scheduled for a Public Hearing at this meeting. The speaker may have up to three minutes to speak. Any persons wishing to address the Council must complete a speaker card located outside the Council Chambers and deliver it to the Town Clerk prior to the commencement of the meeting. Individuals addressing a meeting at the Call to the Public will not be provided with electronic technology capabilities beyond the existing voice amplification and recording capabilities in the facilities. Pursuant to the Arizona Open Meeting Law, at the conclusion of Call to the Public, individual members of the Council may respond to criticism made by those who have addressed the Council, and may ask staff to review the matter, or may ask that the matter be placed on a future agenda. Marana Town Council Regular Meeting Agenda Packet Page 2 of 395 November 19, 2024 PROCLAMATIONS MAYOR AND COUNCIL REPORTS: SUMMARY OF CURRENT EVENTS MANAGER'S REPORT: SUMMARY OF CURRENT EVENTS PRESENTATIONS CONSENT AGENDA The Consent Agenda contains items requiring action by the Council which are generally routine items not requiring Council discussion. A single motion and affirmative vote will approve all items on the Consent Agenda, including any resolutions or ordinances. Prior to a motion to approve the Consent Agenda, any Council member may remove any item from the Consent Agenda and that item will be discussed and voted upon separately. C1 Resolution No. 2024-101: Relating to Development; approving a Final Plat for Saguaro Reserve III at Dove Mountain, Lots 1-236, and Common Areas "A" (Private Streets) and "B" (Open Space / Drainage) located north of Dove Mountain Boulevard and east of Dove Reserve Drive within Sections 16 and 21, Township 11 South and Range 12 East (Scott S. Radden) C2 Resolution No. 2024-102: Relating to Utilities; approving and authorizing the Mayor to sign an amendment to the Intergovernmental Agreement, effective December 1, 2024, between the Town of Marana and Pima County for provision of water consumption data and sewer user account billing services (Kim Baker) C3 Relating to Procurement; approving a change order to the contract with Dibble & Associates in the amount of $106,795.15 for the Airport Control Tower, EA (AP031); authorizing the transfer of appropriations if necessary for the change order; and authorizing the Town Manager or designee to execute the necessary documents to effectuate the change order (Fausto Burruel) C4 Approval of Study Session Summary Minutes of October 29, 2024, and approval of Regular Council Meeting Summary Minutes of November 6, 2024 (David L. Udall) LIQUOR LICENSES Marana Town Council Regular Meeting Agenda Packet Page 3 of 395 November 19, 2024 BOARDS, COMMISSIONS AND COMMITTEES COUNCIL ACTION Al PUBLIC HEARING: Ordinance No. 2024.024: Relating to Development; approving a modification of a rezoning condition of Marana Ordinance No. 2021.016, which rezoned approximately 49 acres of land located approximately one -quarter mile south of Ina Road, west of Silverbell Road, to revise a provision of the ordinance that required all utilities outside of the Western Area Power Administration (WAPA) easement to be located underground (Austin J. Shreffler) A2 Ordinance No. 2024.025: Relating to Land Development, adopting the Town of Marana Drainage Manual (Jason Angell) Resolution No. 2024-103: Relating to Land Development, declaring as a public record filed with the Town Clerk the Town of Marana Drainage Manual adopted by Ordinance No. 2024.025 (Jason Angell) ITEMS FOR DISCUSSION/ POSSIBLE ACTION D1 Resolution No. 2024-104: Relating to Development; adopting the amended Town of Marana Public Art Policy (Andrea De La Cruz) D2 Relating to Economic Development; discussion and consideration of proposal from Marana Urban LLC in response to Town of Marana Request for Proposals (RFP) for Lease and Development of Town -Owned Property Located at Marana Main Street and Civic Center Drive and possible direction to staff to commence negotiations for a lease agreement (Terry S. Rozema) EXECUTIVE SESSIONS Pursuant to A.R.S. § 38-431.03, the Town Council may vote to go into executive session, which will not be open to the public, to discuss certain matters. El Executive Session pursuant to A.R.S. §38-431.03 (A), Council may ask for discussion or consideration, or consultation with designated Town representatives, or consultation for legal advice with the Town Attorney, concerning any matter listed on this agenda for any of the reasons listed in A.R.S. §38-431.03 (A). Marana Town Council Regular Meeting Agenda Packet Page 4 of 395 November 19, 2024 FUTURE AGENDA ITEMS Notwithstanding the Mayor's discretion regarding the items to be placed on the agenda, if three or more Council members request that an item be placed on the agenda, it must be placed on the agenda for the second regular Town Council meeting after the date of the request, pursuant to Marana Town Code Section 2-4-2(B). ADJOURNMENT Marana Town Council Regular Meeting Agenda Packet Page 5 of 395 November 19, 2024 46,, MARANA AZ ESTABLISHED 1 9 7 7 Council -Regular Meeting Ci Meeting Date: 11/19/2024 To: Mayor and Council From: Scott Radden, Senior Planner Date: November 19, 2024 Strategic Plan Focus Area: Not Applicable Subject: Resolution No. 2024-101: Relating to Development; approving a Final Plat for Saguaro Reserve III at Dove Mountain, Lots 1-236, and Common Areas "A" (Private Streets) and "B" (Open Space / Drainage) located north of Dove Mountain Boulevard and east of Dove Reserve Drive within Sections 16 and 21, Township 11 South and Range 12 East (Scott S. Radden) Discussion: Request Baker and Associates Engineering, Inc. on behalf of the property owners, Pusch Ridge Christian Academy, Inc. and DM Phase IV Investment, LLC, is requesting approval of a final plat consisting of 236 residential lots, and Common Areas "A" (Private Streets) and "B" (Open Space/ Drainage) on approximately 81.9 acres within the Dove Mountain development. Zoning The zoning of the property is "F" Dove Mountain Specific Plan with a land use designation of Low -Density Residential (LDR). Under a "cluster option," an average site area of 4,000 square feet per dwelling unit is permitted. Land Use The final plat proposes 236 residential lots, private streets and open space and drainage. A minimum lot size of 6,350 square feet and a maximum of 14,300 square feet is provided. The plat provides an average lot size of 7,533 square feet with a density of 2.87 residences per acre. Marana Town Council Regular Meeting Agenda Packet Page 6 of 395 November 19, 2024 Access and Traffic Circulation The subdivision is accessed from Dove Reserve Drive on the south side. There are three access points to the west, from Dove Mountain Reserve, and one access from the Saguaro Reserve II development on the north side. The subdivision proposes approximately 1.6 miles of new private streets. Infrastructure and Utilities Water service will be provided to the subdivision by Tucson Water. Wastewater service will be provided by Pima County Regional Wastewater. TRICO Electric and Southwest Gas will provide the electric and natural gas services. Preliminary Plat The Saguaro Reserve III at Dove Mountain Preliminary Plat(PRV2211-001) was approved by Town staff on November 13, 2023. Staff Recommendation: Staff has reviewed the request against the requirements of the Dove Mountain Specific Plan, the Marana Town Code, and the Marana General Plan. This Final Plat is in substantial conformance with all required development regulations, and staff recommends approval. Suggested Motion: I move to adopt Resolution No. 2024-101, approving a Final Plat for Saguaro Reserve III at Dove Mountain, Lots 1-236, and Common Areas "A" (Private Streets) and "B" (Open Space / Drainage). Resolution No. 2024-101 Final Plat Location Map Application Attachments Marana Town Council Regular Meeting Agenda Packet Page 7 of 395 November 19, 2024 MARANA RESOLUTION NO. 2024-101 RELATING TO DEVELOPMENT; APPROVING A FINAL PLAT FOR SAGUARO RESERVE III AT DOVE MOUNTAIN, LOTS 1-236, AND COMMON AREAS "A" (PRIVATE STREETS) AND "B" (OPEN SPACE / DRAINAGE) LOCATED NORTH OF DOVE MOUNTAIN BOULEVARD AND EAST OF DOVE RESERVE DRIVE WITHIN SECTIONS 16 AND 21, TOWNSHIP 11 SOUTH AND RANGE 12 EAST WHEREAS, on May 31, 1989, Town Council adopted Ordinance No. 89.22, approving the Dove Mountain Specific Plan (then known as the Tortolita Mountain Properties Specific Plan) which has been amended from time to time by ordinance; and WHEREAS Town staff approved the preliminary plat for Saguaro Reserve III, Lots 1- 235, and Common Areas "A" (Private Streets) and "B" (Open Space/Drainage) on October 30, 2023; and, WHEREAS Baker and Associates Engineering, Inc., representing the property owners, Pusch Ridge Christian Academy, Inc. and DM Phase IV Investments, LLC, has applied for approval of the final plat for Saguaro Reserve III at Dove Mountain, Lots 1- 236, and Common Areas "A" (Private Streets) and "B" (Open Space / Drainage) located north of Dove Mountain Boulevard and east of Dove Reserve Drive; and WHEREAS the Mayor and Town Council, at its November 19, 2024 meeting, determined that the final plat for Saguaro Reserve III at Dove Mountain, Lots 1-236 should be approved. NOW, THEREFORE, BE IT RESOLVED BY THE MAYOR AND COUNCIL OF THE TOWN OF MARANA, ARIZONA that the final plat for Saguaro Reserve III at Dove Mountain, Lots 1-236 is hereby approved. PASSED AND ADOPTED by the Mayor and Council of the Town of Marana, Arizona, this 19th day of November, 2024. Mayor Ed Honea ATTEST: APPROVED AS TO FORM: David L. Udall, Town Clerk Jane Fairall, Town Attorney Resolution No. 2024-101 -1- Marana Town Council Regular Meeting Agenda Packet November 19, 2024 11/19/2024 Page 8 of 395 DEDICATION WE, THE UNDERSIGNED, HEREBY WARRANT THAT WE ARE ALL AND THE ONLY PARTIES HAVING ANY FEE TITLE INTEREST IN THE LAND SHOWN ON THIS PLAT, AND WE CONSENT TO THE SUBDIVISION OF THIS LAND IN THE MANNER SHOWN ON THIS PLAT. UTILITY EASEMENTS, AS SHOWN ON THIS PLAT, ARE GRANTED TO THE TOWN OF MARANA, PIMA COUNTY, AND ALL PUBLIC AND PRIVATE UTILITY COMPANIES FOR THE PURPOSE OF INSTALLATION AND MAINTENANCE OF, AND ACCESS TO, PUBLIC AND PRIVATE UTILITIES AND PUBLIC SEWERS. SUCH UTILITY EASEMENTS ARE ALSO GRANTED TO THE DOVE MOUNTAIN COMMUNITY ASSOCIATION FOR PRIVATE ROADWAY MAINTENANCE AND INSTALLATION, AND MAINTENANCE OF STREET SIGNS. NO VEHICULAR ACCESS EASEMENTS SHOWN ON THIS PLAT ARE GRANTED TO THE TOWN OF MARANA FOR THE PURPOSE OF ACCESS CONTROL TO ADJACENT COMMON AREAS. WE, AND OUR SUCCESSORS AND ASSIGNS, HEREBY HOLD THE TOWN OF MARANA, ITS EMPLOYEES, OFFICERS, AND AGENTS, HARMLESS FROM AND AGAINST ANY AND ALL CLAIMS FOR DAMAGES RELATED TO THE USE OF THESE LANDS NOW AND IN THE FUTURE BY REASON OF FLOODING, FLOWAGE, EROSION, OR DAMAGE CAUSED BY WATER, WHETHER SURFACE, FLOOD OR RAINFALL. NATURAL DRAINAGE SHALL NOT BE ALTERED, DISTURBED, OR OBSTRUCTED WITHOUT THE APPROVAL OF THE TOWN OF MARANA. ALL COMMON AREAS, AS SHOWN ON THIS PLAT, ARE RESERVED FOR THE PRIVATE USE AND AND CONVENIENCE OF ALL OWNERS OF PROPERTY WITHIN THIS SUBDIVISION, THEIR GUESTS AND INVITEES. SUCH PRIVATE USE SHALL INCLUDE CONSTRUCTION OF COMMON AREA IMPROVEMENTS REQUIRED BY THE TOWN FOR THE SUBDIVISION. ALL COMMON AREAS ARE GRANTED AS EASEMENTS TO THE TOWN OF MARANA, PIMA COUNTY, AND ALL PUBLIC AND PRIVATE UTILITY COMPANIES FOR THE PURPOSE OF ACCESS TO, INSTALLATION AND MAINTENANCE OF PUBLIC AND PRIVATE UTILITIES AND PUBLIC SEWERS. TITLE TO ALL COMMON AREAS SHALL BE VESTED IN THE DOVE MOUNTAIN COMMUNITY ASSOCIATION AS ESTABLISHED BY THE AMENDED AND RESTATED MASTER DECLARATION OF COVENANTS, CONDITIONS, RESTRICTIONS AND EASEMENTS RECORDED IN DOCKET 10660/1083 AND AS ESTABLISHED BY THE SUPPLEMENTARY DECLARATION OF COVENANTS, CONDITIONS, RESTRICTIONS AND EASEMENTS AS RECORDED IN SEQUENCE NO. IN THE OFFICE OF THE PIMA COUNTY RECORDER. EACH AND EVERY LOT OWNER WITHIN THE SUBDIVISION SHALL BE A MEMBER OF THE ASSOCIATION, WHICH WILL ACCEPT ALL RESPONSIBILITY FOR THE CONTROL, MAINTENANCE, SAFETY AND LIABILITY OF ALL COMMON AREAS WITHIN THIS SUBDIVISION. LANDMARK TITLE ASSURANCE AGENCY OF ARIZONA, L.L.C. AN ARIZONA LIMITED LIABILITY COMPANY, AS TRUSTEE UNDER TRUST NOS. 18379-T AND 2108 AND NOT IN ITS CORPORATE CAPACITY. TRUST OFFICER TRUST BENEFICIARY - TRUST NO. 18379-7 DM PHASE IV INVESTMENTS, L.L.C. C/0 COTTONWOOD PROPERTIES, INC. 3567 E. SUNRISE DRIVE, #219 TUCSON, AZ 85718 TRUST BENEFICIARY - TRUST NO. 2108 PUSCH RIDGE CHRISTIAN ACADEMY C/0 COTTONWOOD PROPERTIES, INC. 3567 E. SUNRISE DRIVE, #219 TUCSON, AZ 85718 ACKNOWLEDGMENT STATE OF ARIZONA S.S. COUNTY OF PIMA ON THIS, THE DAY OF , 20__, BEFORE ME PERSONALLY APPEARED WHO ACKNOWLEDGED HIMSELF/HERSELF TO BE THE TRUST OFFICER OF LANDMARK TITLE ASSURANCE AGENCY OF ARIZONA, L.L.C., AN ARIZONA LIMITED LIABILITY COMPANY, AS TRUSTEE UNDER TRUST NOS. 18379-T AND 2108, AND NOT IN ITS CORPORATE CAPACITY AND ACKNOWLEDGED THAT HE/SHE, AS THE TRUST OFFICER, BEING AUTHORIZED TO DO SO, EXECUTED THE FOREGOING INSTRUMENT FOR THE PURPOSE(S) THEREIN CONTAINED. IN WITNESS WHEREOF: I HEREBY SET MY NAME AND OFFICIAL SEAL. NOTARY PUBLIC ASSURANCES ASSURANCE IN THE FORM OF THIRD PARTY TRUST AGREEMENTS FROM LANDMARK TITLE ASSURANCE AGENCY OF ARIZONA, L.L.C., TRUST NOS. 18379-T AND 2108, AS RECORDED IN SEQUENCE NUMBER IN THE OFFICE OF THE RECORDER OF PIMA COUNTY, ARIZONA HAVE BEEN PROVIDED TO GUARANTEE INSTALLATION OF REQUIRED STREET, SEWER, ELECTRIC, GAS, AND WATER UTILITIES, DRAINAGE, FLOOD CONTROL AND OTHER SUBDIVISION IMPROVEMENTS MEETING ESTABLISHED MINIMUM STANDARDS OF DESIGN AND CONSTRUCTION. BY. TOWN OF MARANA DATE GENERAL NOTES 1. THE GROSS AREA OF THIS SUBDIVISION IS 3,568,509 SF, OR 81.9 ACRES. 2. THE TOTAL NUMBER OF LOTS IS 236. 3. THE TOTAL AREA OF COMMON AREA "A" (PRIVATE STREETS) IS 366,969 SF. THE TOTAL AREA OF COMMON AREA "B" (OPEN SPACE/DRAINAGE) IS 1,423,508 SF. 4. TOTAL MILES OF NEW PUBLIC STREETS IS 0.0 MILES. TOTAL MILES OF NEW PRIVATE STREETS IS 1.58 MILES. 5. THE APPROVED ZONING FOR THIS PROJECT IS "F" DOVE MOUNTAIN SPECIFIC PLAN AND THE LAND USE DESIGNATION IS "LDR" IN ACCORDANCE WITH THE DOVE MOUNTAIN SPECIFIC PLAN AND WILL REMAIN. 6. AVERAGE ALLOWABLE LOT SIZE IS 4,000 SF (PER THE DOVE MOUNTAIN SPECIFIC PLAN "LDR" DESIGNATION, CLUSTER OPTION). MINIMUM PROVIDED LOT SIZE IS 6,350 SF. AVERAGE LOT SIZE IS 7,533 SF. MAXIMUM LOT SIZE PROVIDED IS 14,300 SF (LOT #221 - NOT A RESTRICTION). MAXIMUM ALLOWABLE BUILDING HEIGHT IS 35 FOR "LDR." 7. THIS PROJECT SHALL COMPLY WITH THE CONDITIONS SET FORTH IN THE DOVE MOUNTAIN SPECIFIC PLAN APPROVED IN MAY, 1989 (ORDINANCE NO. 89.22), AND AS AMENDED BY MARANA ORDINANCE FROM TIME TO TIME. 8. THERE WILL BE 2 PARKING SPACES PROVIDED FOR EACH LOT ON -SITE, AS WELL AS 2 ADDITIONAL GUEST PARKING SPACES. 9. THE BUILDING SETBACKS ARE AS FOLLOWS: FRONT: 20 FEET REAR: 15 FEET SIDE: 5 FEET CORNER: 20 FEET 10. THE GROSS DENSITY FOR THIS PROJECT IS 2.87 RAC. 11. NO FURTHER LOT SPLITTING SHALL BE DONE WITHOUT THE WRITTEN APPROVAL OF THE TOWN OF MARANA. 12. APPROVAL OF THIS PLAT DOES NOT AFFIRM, CERTIFY OR APPROVE ANY LAND DIVISION THAT MAY BE CONTRARY TO STATE LAW, NOR DOES IT CERTIFY THE EXISTENCE OF, OR COMPLIANCE WITH, ANY DEED RESTRICTIONS OR EASEMENTS. 13. OBJECTS AND MATERIALS WITHIN THE SIGHT -VISIBILITY TRIANGLES SHALL BE PLACED SO AS NOT TO INTERFERE WITH A VISIBILITY PLANE DESCRIBED BY TWO HORIZONTAL LINES LOCATED 30 INCHES AND 72 INCHES ABOVE THE FINISHED GRADE OF THE ROADWAY SURFACE AND SHALL CONFORM TO SECTION 4.8 OF THE TOWN OF MARANA SUBDIVISION STANDARDS. 14. THE PROFESSIONAL ENGINEER OF RECORD SHALL CERTIFY AS TO THE FORM, LINE AND FUNCTION OF ALL PUBLIC AND PRIVATE ROADWAYS AND DRAINAGE STRUCTURES BEFORE THE RELEASE OF ASSURANCES. 15. THE AREA BETWEEN 100-YEAR FLOOD LIMITS REPRESENTS AN AREA THAT MAY BE SUBJECT TO FLOODING FROM A 100-YEAR FREQUENCY FLOOD AND ALL LAND IN THIS AREA WILL BE RESTRICTED TO USES THAT ARE COMPATIBLE WITH THE FLOODPLAIN MANAGEMENT AS APPROVED BY THE FLOODPLAIN ADMINISTRATOR. 16. ALL NEW AND EXISTING UTILITIES EXCEPT ELECTRICAL TRANSMISSION LINES CARRYING 48 KV OR GREATER, AND THOSE LINES WHICH CAN BE SHOWN TO EXIST IN CURRENT OR FUTURE ELECTRICAL TRANSMISSION CORRIDORS, WITHIN OR CONTIGUOUS TO THE SITE, SHALL BE PLACED UNDERGROUND. 17. THIS SUBDIVISION IS LOCATED WITHIN THE CITY OF TUCSON SERVICE AREA, WHICH HAS BEEN DESIGNATED AS HAVING AN ASSURED WATER SUPPLY UNDER A.R.S. SECTION 45-576. 18. INSTALLATION OF ITEMS SUCH AS LANDSCAPING, IRRIGATION, SIGNAGE, MONUMENTS, WALLS AND DRAINAGE IMPROVEMENTS IN THE PUBLIC RIGHTS -OF -WAY SHALL REQUIRE A PERPETUAL LICENSE AGREEMENT FOR INSTALLATION, MAINTENANCE AND INDEMNIFICATION. THE LICENSE SHALL BE EXECUTED AND APPROVED BY THE TOWN OF MARANA PRIOR TO APPROVAL OF THE CLOSEOUT PACKAGE FOR THIS PROJECT. BASIS OF BEARING BASIS OF BEARING: NORTH 00'00'49" EAST, ACCORDING TO SEQUENCE NUMBER 20081880587, PIMA COUNTY, ARIZONA BETWEEN MONUMENTS FOUND ON THE WEST LINE OF THE SOUTHWEST QUARTER OF SECTION 16, AS SHOWN. RECORDING DATA STATE OF ARIZONA COUNTY OF PIMA I S.S. FEE SEQUENCE NO. THIS INSTRUMENT WAS FILED FOR RECORD AT THE REQUEST OF BAKER AND ASSOCIATES ENGINEERING, INC., ON THIS ____ DAY OF , 20, AT M. IN SEQUENCE NO. THEREOF. GABRIELLA CAZARES-KELLY, PIMA COUNTY RECORDER DEPUTY COUNTY RECORDER DATE CERTIFICATIONS I HEREBY CERTIFY THAT THE BOUNDARY SURVEY AS SHOWN ON THIS PLAT WAS PERFORMED UNDER MY DIRECTION AND THAT ALL EXISTING OR PROPOSED SURVEY MONUMENTS AND MARKERS SHOWN ARE CORRECTLY DESCRIBED. BRIAN J. LIVERNOIS, R.L.S. ON POINT SURVEYING, PLLC REGISTERED LAND SURVEYOR NO. 58324 STATE OF ARIZONA I HEREBY CERTIFY THAT THE INTERIOR SUBDIVISION GEOMETRY FOR THIS PLAT WAS REVIEWED AND SHOWN UNDER MY SUPERVISION. WILLIAM H. BAKER, JR. BAKER & ASSOCIATES ENGINEERING, INC. REGISTERED LAND SURVEYOR NO. 16784 STATE OF ARIZONA I HEREBY CERTIFY THAT THE FLOODPRONE LIMITS AND EROSION HAZARD SETBACKS WERE REVIEWED AND SHOWN UNDER MY SUPERVISION. LARRY K. ROBERTS ARROYO ENGINEERING, L.L.C. REGISTERED ENGINEER NO. 25331 STATE OF ARIZONA TOWN OF MARANA APPROVALS BY: P.E. MARANA TOWN ENGINEER/DEVELOPMENT ENGINEER BY: MARANA PLANNING MANAGER DATE DATE PIMA COUNTY WASTEWATER APPROVAL BY: PIMA COUNTY REGIONAL WASTEWATER DATE RECLAMATION DEPARTMENT CITY OF TUCSON ASSURED WATER SUPPLY THE UNDERSIGNED CERTIFIES THAT IT IS DESIGNATED AS HAVING AN ASSURED WATER SUPPLY AND WILL PROVIDE WATER SERVICE TO THIS SUBDIVISION. BY: ITS: CITY OF TUCSON WATER DEPARTMENT DATE MARANA TOWN COUNCIL CERTIFICATION I, , CLERK OF THE TOWN OF MARANA, HEREBY CERTIFY THAT THIS PLAT WAS APPROVED BY THE TOWN COUNCIL OF THE TOWN OF MARANA ON THE ____ DAY OF , 20____. BY: CLERK OF THE TOWN OF MARANA SHEET INDEX SHEET #1 SHEET #2 SHEET #3 - #12 SHEET #13 DATE COVER SHEET, NOTES SHEET/KEY MAP, BASIS OF BEARING TIE FINAL PLAT SHEETS CURVE AND LINE TABLES OR UNSUB. DOVE MOUNTAIN SPECIFIC PLAN BOUNDARY UNSUB. THIS PROJECT SAGUARO RESERVE I AT DOVE MOUNTAIN SEQ. 20211680146 17 2 BLUE AGAVE II , AT DOVE MOUNTAIN o SEQ. 20173130079 H SCALE: 3" = 1 MILE 21 BLUE AGAVE AT DOVE MTN. SEQ. 20161060098 STATE LAND SAGUARO RESERVE II AT DOVE MOUNTAIN /SEQ. 20222200263 GOLDEN BARREL PLACE AT DOVE MOUNTAIN SEQ. 20141710079 LOCATION PLAN BOULDER BRIDGE PASS IV AT DOVE MOUNTAIN SEQ. 20201050245 BOULDER BRIDGE PASS III AT DOVE MOUNTAIN SEQ. 20200660137 BOULDER BRIDGE PASS II AT DOVE MOUNTAIN SEQ. 20143250154 SECTIONS 16 AND 21, T 1I S, R 12E, G&SRB&M, TOWN OF MARANA, PIMA COUNTY, ARIZONA LEGEND DOVE MOUNTAIN BOULEVARD DEL WEBB VI AT DOVE MOUNTAIN SEQ. 20172500137 DEL WEBB IV AT DOVE MOUNTAIN SEQ. 20160500158 A FOUND 2" BRASS SURVEY MONUMENT PER TOM STD. DTL. M-103B A SET 2" BRASS SURVEY MONUMENT PER TOM STD. DTL. M-103B • SET PROPERTY CORNER TAGGED "RLS 58324" of 1/2" REBAR TO BE SET BY A REGISTERED LAND SURVEYOR C5 L10 (NEW PRIVATE STREET) CALCULATED POINT (NOTHING FOUND OR SET) SUBDIVISION BOUNDARY CURVE DATA (SEE TABLE, SHEET 13) LINE DATA (SEE TABLE, SHEET 13) NEW PRIVATE RIGHT-OF-WAY DEDICATED BY THIS PLAT NEW RIGHT-OF-WAY LINE EXISTING RIGHT-OF-WAY LINE SECTIONLINE STREET CENTERLINE EASEMENT LINE AS SHOWN (SEE ALSO "EASEMENT KEYNOTES," SHEETS #3 - #12) DEVELOPED 100 YEAR FLOODPRONE LINE ("F.P.L.") DEVELOPED EROSION SETBACK LINE ("E.S.L.') KEYNOTE FOR EROSION SETBACK LINE ("E.S.L.") COINCIDENT WITH LOTLINE (BEGINNING AT TERMINUS OF E.S.L. LINE/LIMIT) (R) RADIAL P/L BOUNDARY/PROPERTY LINE ADMINISTRATIVE ADDRESS 14500 N. DOVE RESERVE DRIVE, MARANA, AZ 85658 FINAL PLAT for SAGUARO RESERVE III AT DOVE MOUNTAIN, LOTS 1-236, AND COMMON AREAS "A" (PRIVATE STREETS) AND "B" (OPEN SPACE/DRAINAGE) BEING A SUBDIVISION OF A PORTION OF BLOCK "1 " OF SAGUARO RESERVE I, SEQ. #20211680146, BLOCKS "1" - "4" OF SAGUARO RESERVE II, SEQ. #20222200263, AND A PORTION OF SECTIONS 16 AND 21, T 1 IS, R12E, G&SRM, TOWN OF MARANA, PIMA COUNTY, ARIZONA A-Ailik 3561 E. Sunrise Drive, Suite #225 Tucson, Arizona 85718 (520) 318-1950 Fax (520) 318-1930 Baker & Associates Engineering, Inc. SEQUENCE # #PRV2403-001 REF.: #PRV2211-001; REF.: PRV2109-005; P RV2102-004; P RV1803-002 JOB #2447.4 DATE: OCTOBER 17, 2024 SHEET 1 OF 13 SEQUENCE # Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 9 of 395 SET 1/2" REBAR TAGGED RLS "58324" 0 0 0 co Oo 0 co FOUND GLO STONE SW COR. SEC. 16 NW COR. SEC. 21 8NI8V38 30 SISVS 44, o 6t, •K% y /'7p// CcJ / OoL t o VD oo VP O 9 /�f7\C�s C.A. �oaD o.I� / �/ 1 N. DOVE RESERVE DRIVE -9S/S \o'`',g Fq/,/4ci 430.58' S2754' 12 "W (TIE TO BASIS OF BEARING) W. SAGUARO PERCH WAY C.A. "A" C.A. "B" SSASUALSO RESERVE 00 AT DOVE C 1OUR1iTLQM1 SEC). HOo0 200222200002SO � Ieo r;z3a i — I gko C.A. "B"/ W. SAGUARO PERCH WAY C.A. "A" SHEET/KEY MAP/ BASIS OF BEARING TIE N. LONE EAGLE DRIVE C.A. "A" 10 1 • PAGE DOVE MOo UGOi1 Aag RESORT ail' PER 7M z 62/71 BLOCK "2" MOUNTAIN BLVD. • SHEET/KEY MAP MATCHLINE SOLLDEH BARREL LL PLACE AT DOVE MOUHTAag SEC). 2o0T4 T7-00o 00 7J 12 6 0 200 SCALE IN FEET SECTIONLINE N. SAGUARO SANCTUARY DRIVE — — — — — — N. GOLDEN BARREL PASS 21 \ FOR INTERIOR GEOMETRY ONLY z C.A. "A" DOVE MOUHTLa00 RESORT PER WED 62/7T BLOCK "8" BOULDER L BR1108E PASS 000 AT DOVE IdOUMTA00 SEC. I O. 20Ta232Z©TZZ3 FINAL PLAT for SAGUARO RESERVE 111 AT DOVE MOUNTAIN, LOTS 1-236, AND COMMON AREAS nA" (PRIVATE STREETS) AND 'Bn (OPEN SPACE/DRAINAGE) BEING A SUBDIVISION OF A PORTION OF BLOCK "1 " OF SAGUARO RESERVE I, SEQ. #2021 1680146, BLOCKS "1" - "4" OF SAGUARO RESERVE II, SEQ. #20222200263, AND A PORTION OF SECTIONS 16 AND 21, T 1 1 S, R 12E, G&SRM, TOWN OF MARANA, PIMA COUNTY, ARIZONA A-dairk_ 3561 E. Sunrise Drive, Suite #225 Tucson, Arizona 85718 (520) 318-1950 Fax (520) 318-1930 Baker & Associates Engineering, Inc. SEQUENCE # #PRV2403-001 REF.: #PRV2211-001; REF.: PRV2109-005; PRV2102-004; PRV1803-002 JOB #2447.4 DATE: OCTOBER 17, 2024 SHEET 2 OF 13 SEQUENCE # Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 10 of 395 MATCHLINE - SEE SHEET #8 • + • 4. D=28°09'57" R=990.00' L=486.67' C.A. ®C3w S75°27'18"E 26.91' / SAGUARO RESERVE G3NIL SEM. M. 20211V8 0 0V4C6 ZOLnv111%ag SP C 11F11C PLLA% / / / / LOT VT I C317 / G2 128.16' S70°47'45"E / / 21' C3 C310 E.S.L. C149 C154 LOT 49 7836 SF C157 LL O IP V10 EASEMENT KEYNOTES NEW 10' UTILITY EASEMENT GRANTED TO THE PUBLIC AND PRIVATE ROADWAY MAINTENANCE & SIGNAGE EASEMENT GRANTED TO THE HOMEOWNER'S ASSOCIATION BY THIS PLAT NEW SIGHT VISIBILITY TRIANGLE ("SVT") EASEMENT AREA GRANTED TO THE TOWN OF MARANA BY THIS PLAT (SEE ALSO DETAILS, SHEETS #3, #5, #6, #9, #10 AND #12) NEW 1' NO VEHICULAR ACCESS EASEMENT GRANTED BY THIS PLAT C.A. "B" 323 CFS (DEv) 00 U COMMON AREA "B" (OPEN SPACE/ DRAINAGE) L9i' L89 — '-'""— 100 YR. F.P.L. ti (DEV) /- /-- Ei (52 ▪ LOT 50 N 7836 SF 01 LLOT LOT 117 LOT 51 7836 SF LOT 52 7836 SF LOT 7 c" LLOo IP i LOT 48 6350 SF \ LOT 1 \cA 6350 SF SAGUARO RESERVE 00 AT DOVE GVt1OMI`rn1IPLalIn1 SEC). %O. 2022220Oo 283 GOnMOfn H SSpC C 11F110 PLLLQnM LOT 56 COMMON AREA "8" (OPEN SPACE/DRAINAGE) 9 0 40 SCALE IN FEET LOT 3 c"q 6350 SF C.A. ®C3w �NE�T #$ / Hu " seems Apk / r► CS) Z 100 YR. F.P.L. (DEV) • m� Im 'Am / LOT 4 O_ 6350 SF C.A. 'B" LOT 42 ▪ LOT 7 LOT 6 O.- 6350 SF COMMON AREA "Er (OPEN SPACE/DRAINAGE) g pE o�� PNB��c R10 �9 oov�M 12° 2°1A1 EX SEQ/ C.A. "B" • • C.A. "B" REN WAY W. CACT UA,W " STREET) (NEW PRIVATE SIGHT VISIBILITY TRIANGLE Mtn") - B3 AND B4 DETAIL - COMMON AREA "B" (NEAR LOTS 49 AND 118) FOR INTERIOR GEOMETRY ONLY FINAL PLAT for SAGUARO RESERVE III AT DOVE MOUNTAIN, LOTS 1-236, AND COMMON AREAS "A" (PRIVATE STREETS) AND "B" (OPEN SPACE/DRAINAGE) BEING A SUBDIVISION OF A PORTION OF BLOCK "1 " OF SAGUARO RESERVE I, SEQ. #20211680146, BLOCKS "1" - "4" OF SAGUARO RESERVE II, SEQ. #20222200263, AND A PORTION OF SECTIONS 16 AND 21, T 1 IS, R12E, G&SRM, TOWN OF MARANA, PIMA COUNTY, ARIZONA A-Ailik 3561 E. Sunrise Drive, Suite #225 Tucson, Arizona 85718 (520) 318-1950 Fax (520) 318-1930 Baker & Associates Engineering, Inc. SEQUENCE # #PRV2403-001 REF.: #PRV2211-001; REF.: PRV2109-005; P RV2102-004; P RV1803-002 JOB #2447.4 DATE: OCTOBER 17, 2024 SHEET 3 OF 13 SEQUENCE # Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 11 of 395 i C.A. "B" W E SNEET SE • LOT 43 100 YR. F.P.L. (DEV) #$• E.S.L. �11 NS N LOT 42 0_ �, 6350 SF o_ • , of 12: 16 N6' p3, / (29 LOT 6 C.A. "B" E.S.L. L71 60 CFS (DEV) _ f 66 T D LOT 41 6543 SF 50 pp, / / N_1 < LOT 7 0_ 6350 SF o., C.A. 'B" 5o00 / 262 52 N6-1• 216 /C 3 N LOT 40 'D- 0 6605 SF / 2 C4 C32 • %4/ *9- (••,•••• • \spx • i COMMON AREA "B" (OPEN SPACE/DRAINAGE) 465,702 SF O -C35 C33 z � LOT 39 (D_ 6605 SF 43 LOT 38 b 6605 SF N C44 C52 o LOT 11 0 6614 SF o o LOT 10 0 W 6614 SF LOT 9 0_ c 6551 SF LOT 8 0 6350 SF �16 COMMON AREA "8" (OPEN SPACE/DRAINAGE) -1• i Zm\ cl / C65 036 N LOT 37 , w 6605 SF C53 C 4 5 c37 C32 7... C326 N N, LOT 36 0 1,5 6605 SF — C46 c32 _ Z N LOT 12 0 0 6614 SF CoLao "0" C54 u; w LOT 13 N 6614 SF i Q _ O N 7,1 LOT 35 0 v, 6605 SF O C47 C 5 5 o LOT 14 cn N 6614 SF C65_— LOT 34 6605 SF Z7 C56 C 6 6 —� C48 C.A. "B" MATCHLINE - SEE SHEET #7 100 YR. N O O C57 F.P.L. (DEV) — C40 0 01 01 CO 70 LOT 15 6576 SF LOT 33 6605 SF C79— v 0 O C 4 9 0 C58 L69 —.: C41 S87°31 ' 10 "W 19.81' Ue NS LOT 16 6576 SF o ocl LOT 32 6504 SF 50.00' S8731'10"W z _ N N 0 63LOT50 31 SF C50 19.81' 50.00' 57 CFS ___\(c.DEV) 50.00 Z N LOT 30 • 6350 SF 50.00' W. SAGUARO PERCH WAY COMMON AREA "A" —1?<7:1—. (NEW PRIVATE STREET) C59 COMMON AREA "B" (OPEN SPACE/ DRAINAGE) C 1 7 BOULEVARD DOVE MOUNTAIN B EX. 120' PUBLIC VW PER SEQ # 20141710079 p 02 08 54, R=1 p00.00 L=351.66 i — 39.03' o LOT 17 iv 6479 SF � o C61 39.03' 50.00' Z LOT 18 Po 6350 SF o Ui N87°31'10"E COMMON AREA "B" (OPEN SPACE/DRAINAGE) 114,251 SF GOoLLDC Nn1 BARREL PLACE AT DOVE l aLbrI`rn] AM SEQ. GIOo 20`14T r110o Oo 72 50.00' O COMMON AREA "B" (OPEN SPACE/DRAINAGE) Z O N N c CD 50.00' L126 50.00' LOT 29 6350 SF 50.00' • • S8731 ' 10 "W 50.00' z N N 0 0 6350LOT S28F 50.00' S87°31 ' 10 "W Z N LOT 19 N r 6350 SF v; 424.03' 50.00' N LOT 20 N 6350 SF o v; 50.00' C.A. "B" SeGe*6 soe • z co LOT 27 vi 50.00' N LOT21 N � 6350 SF o o 377.66' 50.00' N87°31'10"E S8731'10"W — — 437.66' z 'N N CO zw • LOT 22 SCALE IN FEET EASEMENT KEYNOTES NEW 10' UTILITY EASEMENT GRANTED TO THE PUBLIC AND PRIVATE ROADWAY MAINTENANCE & SIGNAGE EASEMENT GRANTED TO THE HOMEOWNER'S ASSOCIATION BY THIS PLAT NEW SIGHT VISIBILITY TRIANGLE ("svo EASEMENT AREA GRANTED TO THE TOWN OF MARANA BY THIS PLAT (SEE ALSO DETAILS, SHEETS #3, NEW 1' NO VEHICULAR ACCESS EASEMENT GRANTED BY THIS PLAT FOR INTERIOR GEOMETRY ONLY FINAL PLAT for SAGUARO RESERVE III AT DOVE MOUNTAIN, LOTS 1-236, AND COMMON AREAS "A" (PRIVATE STREETS) AND "B" (OPEN SPACE/DRAINAGE) BEING A SUBDIVISION OF A PORTION OF BLOCK "1 " OF SAGUARO RESERVE I, SEQ. #20211680146, BLOCKS "1" — ''4'' OF SAGUARO RESERVE II, SEQ. #20222200263, AND A PORTION OF SECTIONS 16 AND 21, Adillilk 3561 E. Sunrise Drive, Suite #225 Tucson, Arizona 85718 (520) 318-1950 Fax (520) 318-1930 Baker & Associates Engineering, Inc. SEQUENCE # JOB #2447.4 DATE: OCTOBER 17, 2024 SHEET 4 OF 13 SEQUENCE # Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 12 of 395 C.A. "8" C.A. "8" ',. I /8 V CO � cry . MATCHLINE - SEE SHEET #6 LOT 28 N co • S87°31'10"W S87°31'10111 • 424.03' 50.00' LOT 27 6350 SF 50.00' LOT 21 0 C.A. "B" 377.66' S87°31 '1 0"W 437.66' W CO W i z • N O oo 50.00' • 50.00' LOT 26 6350 SF 50.00' N N OD LOT 22 0 0 6350 SF o 50.00' N N co • 50. • N LOT 25 0 0 6350 SF o LOT 23 6350 SF N87°31'10"E 50.00' COMMON AREA "B" (OPEN SPACE/DRAINAGE) C.A. '0" 1 C.A. "8„ COMMON AREA "B" (OPEN SPACE/DRAINAGE) N co 0, S8731'10111 of N NI �I LOT 24 I 6350 SF NI VI OI 50.00' 60' 60.00' L19 S87°31 ' 10 "W 74.00' COMMON AREA "B" (OPEN SPACE/ DRAINAGE) LOT 227 9398 SF 74.00' N Co CD 74.00 LOT 228 9398 SF W. SAGUARO PERCH WAY COMMON AREA "A" _ (NEW PRIVATE STREET) • 60' it — — 6 .00' CO 74.00' 66.36' LOT 226 9394 SF 74.00'_ O x N N oo LOT 232 S81 °58'37,'W 127.00 LOT 231 8890 SF S81 °58'37"W 127.00' — — COMMON AREA — "g" (OPEN SPACE/DRAINAGE) S87°31'10"1/ LOT 229 9398 SF 74.00' S87°31'10"W 338.48' N N co S8731'10"W N87°31'10'E 1073.41' EX. PUBLIC WATER EASEMENT PER SEQ. #20160130281 74.00' LOT 225 9398 SF 74.00' — — — 70.00' -III I Z 0I NI LOT 230 I 00 8887 SF I oN„ (_°,I N N co CD L18 C67 62.70' 5�22�s2„ C70 LOT 224 9743 SF 7 11 rn IU, 0 Co ca'nO oo II, N5 Iw ri 21' 0 c) rn co N co 1' CD N vl 9I of 1 LOT 218 S81 °58'37"W 127.00 0 co co. LOT 219 8890 SF »W 127.00' S81°58 37 DRAINAGE) 1 — ,� I COMMON AREA "g" (OPEN SPACE/ — — N 11 127.00' L21 LOT 220 9998 SF N. LONE EAGLE DRIVE EA " V I (NEW COMMON PRIVATEARSTRE"AET) S87°31'10"W N 0 C69 �7 L23 _ COMMON AREA "8" (OPEN SPACE/DRAINAGE) DOVE MOUNTAIN BOULEVARD EX. 120' PUBLIC R/W PER SEQ #20132910078 C.A. "C3" / LOT 223 12938 SF 575.75' 2� S87°31 '1 0"W 635. 75' 136.39' i LOT 221 9304 SF S87°31'10"W 127.03' LOT 222 14300 SF / / C.A. "B" ` DOVE AOMIn91TAIIn1 RESORT -b PER MAP 622/7V 1 MATCHLIN- - SEE SHEET #6 0 730 m z � Z rn • COMMON AREA "8" (OPEN SPACE/DRAINAGE) co • 01 N 100 YR. F.P.L. (DEV) 0 40 SCALE IN FEET LOT 22 DOVE Mak9n% TAIIM RESORT LC03 MAP 62/71' MOCK '8' ZOMalOB SSP C11F11C PIA (Si IND FOR INTERIOR GEOMETRY ONLY BOULDER L3G3008C PASS 00 AT DOVE HOUMITLQag LLOY'S SG SEQ. n%O. 201/Z02 Z01/5Z C.A. '0" L40 LOT 23 W. SAGUARO PERCH WAY C.A. "A" (NEW PRIVATE STREET) SIGHT VISIBILITY TRIANGLE ("SVT") — B1 AND B2 DETAIL - LOTS 23 AND 226 AND COMMON AREA "B" 0 40 SCALE IN FEET L42 EASEMENT KEYNOTES NEW 10' UTILITY EASEMENT GRANTED TO THE PUBLIC AND PRIVATE ROADWAY MAINTENANCE & SIGNAGE EASEMENT GRANTED TO THE HOMEOWNER'S ASSOCIATION BY THIS PLAT NEW SIGHT VISIBILITY TRIANGLE ("SVT') EASEMENT AREA GRANTED TO THE TOWN OF MARANA BY THIS PLAT (SEE ALSO DETAILS, SHEETS #3, #5, #6, #9, #10 AND #12) NEW 1' NO VEHICULAR ACCESS EASEMENT GRANTED BY THIS PLAT FINAL PLAT for SAGUARO RESERVE III AT DOVE MOUNTAIN, LOTS 1-236, AND COMMON AREAS "A" (PRIVATE STREETS) AND "B" (OPEN SPACE/DRAINAGE) BEING A SUBDIVISION OF A PORTION OF BLOCK "1 " OF SAGUARO RESERVE I, SEQ. #20211680146, BLOCKS "1" — "4" OF SAGUARO RESERVE II, SEQ. #20222200263, AND A PORTION OF SECTIONS 16 AND 21, T 1 IS, R12E, G&SRM, TOWN OF MARANA, PIMA COUNTY, ARIZONA A-Alik 3561 E. Sunrise Drive, Suite #225 Tucson, Arizona 85718 (520) 318-1950 Fax (520) 318-1930 Baker & Associates Engineering, Inc. SEQUENCE # #PRV2403-001 REF.: #PRV2211-001; REF.: PRV2109-005; P RV2102-004; P RV1803-002 JOB #2447.4 DATE: OCTOBER 17, 2024 SHEET 5 OF 13 SEQUENCE # Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 13 of 395 LOT 92 • iw • • I I � 0 C.A. "B" / / 1„W / C.A. "B" gNEE gEE / / 50 00 N_1 LOT91 0„ 6350 SF LOT 77 / / / N_1 LOT 90 0.. 6350 SF N_1 LOT 89 2- 6350 SF / � p0 GPG�MON p,RFA E � C0 S(R INEW PRI\IN 5000 5pp0' LOT 78 0.. 6350 SF S COMMON AREA "B" (OPEN SPACE/DRAINAGE) • • MATCHLINE SEE - SEE SHEET #5 SHEET #4 • 8 _1 LOT 79 0_ 6350 SF /50 00 N_1 LOT 88 (D- 6350 SF 501"W/ S6$ g1' 52p. 500°/ N_1 LOT 80 0. Q 6350 SF cSD COMMON AREA "B" (OPEN SPACE/DRAINAGE) C.A. 'B" N LOT 86 ' o 6350 SF N_1 LOT 87 c'- 6350 SF N_1 LOT 81 0- 6350 SF C.A. 'B" \ " S6$ 50 0p �\ B6 \ N_\ Q N LOT 85 6350 SF rczl // 5000 500 50 001 / N_1 LOT 82 0.. 6350 SF 50 0�, 'W / S SECTIONLINE N_1 LOT 83 0„ 6350 SF 50 °0/ O x . — COMMON AREA "B"\ (OPEN DRAINAGE) SPACE/ N\ LOT 84 6350 SF \ �+ I N_1\ 2 \ C31 L26 \ 50 pp'/ / S — S81 °58'37"W 127. 8 \ \ 2 \ I O � II to NI �'I I 12700' 37"W --- S81°58'_---- — — — — "g" (OPEN SPACE/DRAINAGE) COMMON AREA OI IV I0 (1) O 0 °° 0 O I ,pp"E N73.39 .p0 / �127 1 O II I II II LOT 236 8890 SF LOT 235 8890 SF S81 °58'37'W 127.00' LOT 234 8890 SF S81 °58'37"W 127.00' LOT 233 8890 SF II IV I0 0 II S81.58'37"W 127.00' LOT 232 8890 SF S81 °58'37'W 127.00' LOT 231 II IV 0 I0 0 II C.A. 'B" LOT 209 8893 SF 1,1 73 39 00 E 127.09 II vl 01 0 II LOT 210 9377 SF L1 S77e35154."W(R) 128.02' r N 21' \ 21' II IV 0 0 I 0 II LOT 211 9414 SF S81 °58'37'W 127.00' LOT 212 8890 SF S81 °58'37"W 127.00' LOT 213 8890 SF S81 °58'37'W 127.00' LOT 214 8890 SF DOVE ligalMTA11% RESORT PER MAP 62/7f1 MATCHLINE - SEE SHEET #12 02 100 YR. F.P.L. (DEV) N �C�, E_S O 0 �C) m 0 cn z � z rrt D O 03 O S81°58'37'W-127.00_ — — "g" (OPEN SPACE/DRAINAGE) COMMON AREA O I of LOT 215 8I — — — S81 8'37"W 127.00 II II OI 0 I II 8890 SF LOT 216 8890 SF LOT 217 8890 SF LOT 218 8890 SF LOT 219 cn cp DOVE WOUR1TAll% RESORT PER MAP 62/7T BLOCK w8' 09. Co Co Co SECTIONLINE MATCHLINE SEE SHEET #5 SCALE IN FEET LOT 85 LOT 84 SCALE IN FEET 0 33 DETAIL - COMMON AREA ”B" (NEAR LOTS 84 AND 85) EASEMENT KEYNOTES NEW 10' UTILITY EASEMENT GRANTED TO THE PUBLIC AND PRIVATE ROADWAY MAINTENANCE & SIGNAGE EASEMENT GRANTED TO THE HOMEOWNER'S ASSOCIATION BY THIS PLAT NEW SIGHT VISIBILITY TRIANGLE ("SW) EASEMENT AREA GRANTED TO THE TOWN OF MARANA BY THIS PLAT (SEE ALSO DETAILS, SHEUS /3, NEW 1' NO VEHICULAR ACCESS EASEMENT GRANTED BY THIS PLAT FOR INTERIOR GEOMETRY ONLY FINAL PLAT for SAGUARO RESERVE III AT DOVE MOUNTAIN, LOTS 1-236, AND COMMON AREAS "A" (PRIVATE STREETS) AND "B" (OPEN SPACE/DRAINAGE) BEING A SUBDIVISION OF A PORTION OF BLOCK "1 " OF SAGUARO RESERVE I, SEQ. #20211680146, BLOCKS "1" - ''4'' OF SAGUARO RESERVE II, SEQ. #20222200263, AND A PORTION OF SECTIONS 16 AND 21, A-allik 3561 E. Sunrise Drive, Suite #225 Tucson, Arizona 85718 (520) 318-1950 Fax (520) 318-1930 Baker & Associates Engineering, Inc. SEQUENCE # C.A. "B" JOB #2447.4 DATE: OCTOBER 17, 2024 SHEET 6 OF 13 SEQUENCE # Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 14 of 395 C.A. "B" •\T LOT 105 77 z E -SEE SHEET #11 MATCHLINE 0 • COMMON AREA "B" (OPEN SPACE/DRAINAGE) z LOT 103 N U: 6992 SF LOT 104 ' o 6992 SF LOT 65 \o-D,.. /•. /•. /' v..A 12 --�128 LOT 101 6992 SF LOT 102 6992 SF C29 LOT 66 7194 SF C.A. „B„ C135 LOT 67 7194 SF Cl / C113 0 0 19 70 C.A. 'B" L111 N 0 LOT 100 6992 SF C 1 1 4 C130 LOT 99 6992 SF C115 40.83'- 585°03'14'E C131 O O Zo � , LOT 98 6467 SF CI- C116 40.83' C106 L31 L30 LOT 97 S 7174 SF C103 L110 100 YR. F.P.L. (DEV) C322 — C105 LOT 96 7194 SF C102 —_S85203'14"E W. CACTUS WREN WAY COMMON AREA "A" (NEW PRIVATE STREET) C136 — — LOT 68 7194 SF COMMON AREA "B" (OPEN SPACE/DRAINAGE) / 7 0 —..— �—..—..— • /. C120 — C137 LOT 69 7194 SF C 1 2 1 C 138 37.05' L29 I N of LOT 70 NI 6567 SF �I 'to/ rI �I C122 6°3 100 YR. IFS F.P.L. (DEv) /••• S85.03'147- I 37.05' J r 1 C96 to IN I� LOT71 0 6992 SF Id' IN to C95 0 w C94 LOT 72 6992 SF COMMON AREA "B" (OPEN SPACE/ DRAINAGE) COMMON AREA "B" (OPEN SPACE/DRAINAGE) N V MATCHLINE - SEE SHEET #4 C.A. "8" 0 O SHEET 01� ��` MATCHLINE -SEE . rz C104 0 N 70 C30 , ▪ rn /' \.' COMMON AREA "B" \VC\ (OPEN SPACE/ -� DRAINAGE) N . / •• 566 2c C1 1 LOT 95 7194 SF C93 _ — LOT 73 6992 SF — C 9 8 IN SECTIONLINE N_1 LOT 94 �, 6704 SF 0 C92 C42 N_1 LOT 93 0 6350 SF C144 L27 LOT 74 •o 6992 SF o_ LOT 75 'o 6872 SF w m LYN L28 143 "B COMMON AREA " (OPEN SPACE/DRAINAGE) C.A. "B" N_1 LOT 92 0_ 6350 SF N_1 LOT 76 0_ 6350 SF . LLIZ /1,04, co • 46, 0 LOT91 01 ciD SEE SHEET #5 • 56 '52° LOT 77 I 2X �� 6350 SF C 40 SCALE IN FEET LOT 78 EASEMENT KEYNOTES NEW 10' UTILITY EASEMENT GRANTED TO THE PUBLIC AND PRIVATE ROADWAY MAINTENANCE & SIGNAGE EASEMENT GRANTED TO THE HOMEOWNER'S ASSOCIATION BY THIS PLAT NEW SIGHT VISIBILITY TRIANGLE ("St/r) EASEMENT AREA GRANTED TO THE TOWN OF MARANA BY THIS PLAT (SEE ALSO DETAILS, SHEETS #3, #5, #6, #9, #10 AND #12) NEW 1' NO VEHICULAR ACCESS EASEMENT GRANTED BY THIS PLAT FOR INTERIOR GEOMETRY ONLY FINAL PLAT for SAGUARO RESERVE III AT DOVE MOUNTAIN, LOTS 1-236, AND COMMON AREAS "A" (PRIVATE STREETS) AND "B" (OPEN SPACE/DRAINAGE) BEING A SUBDIVISION OF A PORTION OF BLOCK "1 " OF SAGUARO RESERVE I, SEQ. #20211680146, BLOCKS "1" — ''4'' OF SAGUARO RESERVE II, SEQ. #20222200263, AND A PORTION OF SECTIONS 16 AND 21, Aililk 3561 E. Sunrise Drive, Suite #225 Tucson, Arizona 85718 (520) 318-1950 Fax (520)318-1930 Baker & Associates Engineering, Inc. SEQUENCE # JOB #2447.4 DATE: OCTOBER 17, 2024 SHEET 7 OF 13 SEQUENCE # Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 15 of 395 RESERVE 0 \ \ V EQo MATCHLINE SEE HEEkr #9 \ LLOY SOO LL07 -I66 \ 1' 21' Z/°QQM/QG;3Oo RESERVE SEQ. HO 202 T-006300 TZ8 'ONnllM2B SLC'C01 OC LLL/ U I MATCHLINE - SEE SHEET #3T I I� I D=28°09'57" R=990.00' L=486.67' Z/aCM/aU3Oo RESERVE 0 SEC). L7lO. 2002T06800-146 C.A. "B" COMMON AREA "8" (OPEN SPACE/DRAINAGE) C.A. "B" 100 YR. F.P.L. (DEV) SECTIONLINE 7 •00 LOT 118 O 0- LOT 117 6350 SF LOT 1 6350 LOT 116 ,G 6350 SF 5o. 63, / // /(0• o"5 LOT 114 /11,-o° 6350 SF &- (5'' 15 SF • — / / / 7 > LOT 113 46,. 6350 SF ,off LOT 55 7 8 •0. COMMON AREA "8" (OPEN SPACE/ DRAINAGE) C.A. 'B" ./ / COMMON AREA "8" (OPEN SPACE/DRAINAGE) 448,261 SF 7 00- LOT 112 ,G 6350 SF �6. 20�L 00- LOT 109 6350 SF moo. ,ok LOT 110 6350 SF moo. o&- .00, LOT 111 6350 SF LOT 57 4 6350 SF o° &, LOT 56 1/�6350 SF 60 ,off Os\A moo sAigTFsy�FE . #1I • LOT 107 ,G 6992 SF LOT 108 6530 SF &- C140 /\ ) "8 "(OPEN COMMON AREA " (ODRAINAGE) SPACE/ LOT 59 6350 SF & JOIL LOT 58 6350 SF • ATCNLIN #3 SEE SHEET C.A. 'B" LOT 60 6350 SF stx LOT 106 6992 SF O- LOT 61 6350 SF 7� Do 6350 SF / <001 C.A. "B" LOT 105 6992 SF C.A. 'B" o_. , 7 , z 7 LOT 63 6585 SF F.P.L. / - LOT 104 LOT 64 7194 SF 43/ COMMON AREA 'Er (OPEN SPACE/DRAINAGE) • ND • cP LOT 65 7194 SF cP. SCALE IN FEET LOT 66 SECTIONLINE • ,/n# • • EASEMENT KEYNOTES NEW 10' UTILITY EASEMENT GRANTED TO THE PUBLIC AND PRIVATE ROADWAY MAINTENANCE & SIGNAGE EASEMENT GRANTED TO THE HOMEOWNER'S ASSOCIATION BY THIS PLAT NEW SIGHT VISIBILIN TRIANGLE EASEMENT AREA GRANTED TO THE TOWN OF MARANA BY THIS PLAT (SEE ALSO DETAILS, SHEETS #3, NEW 1' NO VEHICULAR ACCESS EASEMENT GRANTED BY THIS PLAT FOR INTERIOR GEOMETRY ONLY FINAL PLAT for SAGUARO RESERVE III AT DOVE MOUNTAIN, LOTS 1-236, AND COMMON AREAS "A" (PRIVATE STREETS) AND "B" (OPEN SPACE/DRAINAGE) BEING A SUBDIVISION OF A PORTION OF BLOCK "1 " OF SAGUARO RESERVE I, SEQ. #20211680146, BLOCKS "1" - ''4'' OF SAGUARO RESERVE II, SEQ. #20222200263, AND A PORTION OF SECTIONS 16 AND 21, A—Ailik 3561 E. Sunrise Drive, Suite #225 Tucson, Arizona 85718 (520) 318-1950 Fax (520) 318-1930 Baker & Associates Engineering, Inc. SEQUENCE # JOB #2447.4 DATE: OCTOBER 17, 2024 SHEET 8 OF 13 SEQUENCE # Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 16 of 395 SSA MJA1?6 RESERVE 0 SEC). 410. 2002VVC6B T46 zOIvn1 3a SLL CO(OC / LL/°QIn1 / / / / / / / / LOT f15T SSLQC UARO RESERVE 00 AT DOVE WCAMTAilM SEG. M. 2022220026 3 MOMM128 SP CO(OC ILL/Qg LOT VZ2 C.A. WQ W C.A. WC3W C.A. nB" (OPEN SPACE/ DRAINAGE) LOT -11.63 \ COMMON AREA "B" (OPEN SPACE/DRAINAGE) 100,687 SF \ 5°` L32 7, LOT 146 9402 SF 7 00, / LOT 147 7620 SF L34 G� LOT 145 7620 SF C.A. "B" (OPEN SPACE, DRAINAGE) MATCHLINE SEE SMEET`#8 oo, SSLQWARC) RESERVE 00 AT DOVE Gail ©MM1PLQ DIn1 SEC). MCI 2022220026 3 MATCHLINE — SEE SHEET #10 LOT 148 7620 SF i 7� 00 tx �b nob 2 FS 100 YR. F.P.L. (DEV) LOT 149 7620 SF / / /0 //co6. / n0 7� 00 7� oo- sr F LOT 150 7620 SF /, / 00 /. / 1/'03\,i,q1,0 QlG o���PN4* /0, 4 / / LOT 144 8957 SF 7� 00, LOT 151 7620 SF 7 oo- LOT 142 7620 SF sr F LOT 143 8131 SF C.A. "B" 1>5 5 C.A. "B" /\S LOT 152 7620 SF 7� 00 LOT 141 7620 SF 7 00 0 40 SCALE IN FEET / LOT 153 7620 SF / 72 Oo, LOT 140 7620 SF / 7� 0- / LOT 154 s • LOT 139 7620 SF / sr 7 N-D,› •00- LOT 138 7620 SF coo / / 5�� LOT 137 7620 SF cs- LOT 135 LOT 136 7620 SF COMMON AREA 13' (OPEN SPACE/ DRAINAGE) • • • rnm>8 rn FOR INTERIOR GEOMETRY ONLY C.A. "B" 0 40 SCALE IN FEET DETAIL - COMMON AREA "B" (NEAR LOTS 145 AND 146) EASEMENT KEYNOTES NEW 10' UTILITY EASEMENT GRANTED TO THE PUBLIC AND PRIVATE ROADWAY MAINTENANCE 8e SIGNAGE EASEMENT GRANTED TO THE HOMEOWNER'S ASSOCIATION BY THIS PLAT NEW SIGHT VISIBILITY TRIANGLE (nsvr") EASEMENT AREA GRANTED TO THE TOWN OF MARANA BY THIS PLAT (SEE ALSO DETAILS, SHEETS #3, NEW 1' NO VEHICULAR ACCESS EASEMENT GRANTED BY THIS PLAT FINAL PLAT for SAGUARO RESERVE III AT DOVE MOUNTAIN, LOTS 1-236, AND COMMON AREAS "A" (PRIVATE STREETS) AND "B" (OPEN SPACE/DRAINAGE) BEING A SUBDIVISION OF A PORTION OF BLOCK "1 " OF SAGUARO RESERVE I, SEQ. #20211680146, BLOCKS "1" — ''4'' OF SAGUARO RESERVE II, SEQ. #20222200263, AND A PORTION OF SECTIONS 16 AND 21, A-Allik 3561 E. Sunrise Drive, Suite #225 Tucson, Arizona 85718 (520) 318-1950 Fax (520) 318-1930 Baker & Associates Engineering, Inc. SEQUENCE # SAWARD RESERVE SEC). nHO. 202T-1660T46 JOB #2447.4 DATE: OCTOBER 17, 2024 SHEET 9 OF 13 SEQUENCE # Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 17 of 395 • LL O IP 246 LOT 24315 LLOoT2ZZ / \ po / / / SA sM/°QG30 G3C sszbwC 1111 AIT DOoMC,:c llmIPnag :Elm L7/Jc 202�2� —2�Oo Oo 2 53 (:)%aga spC:11;11C pLLA% 5,36„W 164•10 pRP�NPGEi 'WY ��� S�2 OPEN SPACE/ MMO f \ COON O -� W� 2� 00 �'\ .213 �\ n LOT 24377 • Z 1nM8HAPC C UFBC PLL/a Y / / 4 �P a� poo 6�� SQP ,QiF' ler 00 �561� LOT 185 8337 SF 7 'SAGUARO RESERVE RVEE 00 AT DOVE In OMnM I Tag SEG. HO. 20222220028S MeHall28 SPECARC /LL/QH C.A. 70" MATCHLINE — •�� SEE SHEET #9 '\ / °� .4�/ \\ C.A. "B" • • •o COMMON AREA "B" (OPEN SPACE/DRAINAGE) 100 YR. F.P.L. (DEv) /t LOT 153 EASEMENT KEYNOTES NEW 10' UTILITY EASEMENT GRANTED TO THE PUBLIC AND PRIVATE ROADWAY MAINTENANCE & SIGNAGE EASEMENT GRANTED TO THE HOMEOWNER'S ASSOCIATION BY THIS PLAT NEW SIGHT VISIBILITY TRIANGLE ("SVT') EASEMENT AREA GRANTED TO THE TOWN OF MARANA BY THIS PLAT (SEE ALSO DETAILS, SHEETS #3, #5, #6, #9, #10 AND #12) NEW 1' NO VEHICULAR ACCESS EASEMENT GRANTED BY THIS PLAT 00 •00, LOT 154 7620 SF LOT 155 7620 SF SAGUARO R CSC RC 00 N-o C Qo HD. 2 02�2�2�002�C�3 \ NNE �0 N-23 O rrl 0 \ q\' 7 '00, S69\ C) 0 LOT 184 8337 SF / s\ s>� F LOT 156 7�>\ 7620 SF •00\ LOT 183 8337 SF 4 s0 LOT 186 8535 SF S60Ac \2� 1\ s\ \ C274 � • 00, LOT 157 7620 SF COMMON AREA "B" / (OPEN SPACE/ / DRAINAGE) /, / p0 / po• / i / o5% / ply / Sty/5��p / 0 / / / / LOT 136 19 C311 / 4D / 00 LOT 187 8535 SF 7 > .00, LOT 158 7620 SF LOT 159 7620 SF LOT 188 8535 SF GIN / GP SQ' cp �oQ\ PAP / / / N 0 26, jN /o /\� c6, N L36 '�1 o LOT 160 /•o0) 8477 SF / �' kk ,4 r 0, C 6 (4/ 4/1 N 57°0,9Y 'Ss '°4i47i �4 q `'4rj/F LOT 135 7617 SF COMMON AREA "B" (OPEN DRAINAGE) SPACE/ C.A. "B" / LOT 134 / • 4\'''0 LOT 189 8535 SF < rn co COMMON AREA "B" (OPEN DRAINAGE) SPACE/ 10,104 SF S763943"E 54 29' C289 C6'4 / LOT 161 8724 SF LOT 190 8535 SF co LOT 182 SCALE IN FEET LOT 162 COMMON AREA 71° (OPEN SPACE/DRAINAGE) LOT 191 8535 SF LOT 181 8337 SF LOT 163 LOT 192 8535 SF LOT 180 8337 SF LOT 164 DOVE MC:AMY/10H RESORT LOT 193 8535 SF cNI ND - 7 tND LOT 179 8337 SF LOT 165 LOT 194 8535 SF C247 LOT 178 8337 SF rril LOT 166 • cn 1-1 FOR INTERIOR GEOMETRY ONLY LOT 177 8290 SF LOT 167 LOT 196 8344 SF LOT 195 C246 CD r. 7,1 • c.1 • zw I ill zI;=° ND LOT 176 8547 SF SCALE IN FEET L58 LOT 135 LOT 136 • 0%9,, (44 C.A. C.A. LOT 160 DETAIL - LOTS 135 AND 1 36 AND COMMON AREA "Bn (NEAR LOT 1 60) DOVE HOUHTAall RESORT PER HAP 82/7-0 LOT 197 0▪ 0 MATC LOT 168 ND CD LOT 175 LINE - SEE SHEET #11 LOT 169 FINAL PLAT for SAGUARO RESERVE III AT DOVE MOUNTAIN, LOTS 1-236, AND COMMON AREAS "A" (PRIVATE STREETS) AND "B" (OPEN SPACE/DRAINAGE) BEING A SUBDIVISION OF A PORTION OF BLOCK "1 " OF SAGUARO RESERVE I, SEQ. #20211680146, BLOCKS "1" — ''4'' OF SAGUARO RESERVE II, SEQ. #20222200263, AND A PORTION OF SECTIONS 16 AND 21, TI IS, R12E, G&SRA4, TOWN OF MARANA, PIMA COUNTY, ARIZONA A—Ailik 3561 E. Sunrise Drive, Suite #225 Tucson, Arizona 85718 (520) 318-1950 Fax (520) 318-1930 Baker & Associates Engineering, Inc. SEQUENCE # JOB #2447.4 DATE: OCTOBER 17, 2024 SHEET 10 OF 13 SEQUENCE # Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 18 of 395 C.A. "B" • g C.A. "B" LOT 135 C.A. "B" LOT 134 8086 SF COMMON AREA 'E' (OPEN SPACE/DRAINAGE) LOT 161 E.S.L• L115 100 YR. F.P.L. • (DE) • LOT 182 LOT 162 8724 SF . � LOT 132 8086 SF • C.A. "B" LOT 181 LOT 163 8724 SF LOT 131 8086 SF LOT 180 LOT 164 8724 SF LOT 179 LOT 165 8724 SF LOT 178 W. DESERT CHICORY LANE COMMON AREA 'A (NEW PRIVATE STREET) C189 C188___ LOT 130 8086 SF _C200 LOT 129 8086 SF COMMON AREA 'B' (OPEN SPACE/DRAINAGE) - LOT 128 8086 SF . • MATCHLINE - SEE SHEET #7 - - LOT 177 LOT 167 8372 SF LOT 127 7782 SF I LOT 176 0 40 SCALE IN FEET LOT 175 MATCHLINE - C SE SHEET #10 H�INE SEE SHEET I #12 SE C280 C281 39.05' — N81 °30'41 "E . � - - LOT 169 8438 SF (.31 N81°30'41"E _ - 237.90' LOT 126 0 7620 SF o • N LOT 125 7620 SF o C.A. "B" • LOT 174 LOT 170 ,V 7880 SF 0 N CID N LOT 124 7620 SF o CID 60.001_-- N81 °30'41 "E LOT 171 LOT 123 C.A. EASEMENT KEYNOTES NEW 10' UTILITY EASEMENT GRANTED TO THE PUBLIC AND PRIVATE ROADWAY MAINTENANCE & SIGNAGE EASEMENT GRANTED TO THE HOMEOWNER'S ASSOCIATION BY THIS PLAT NEW SIGHT VISIBILITY TRIANGLE ("SW) EASEMENT AREA GRANTED TO THE TOWN OF MARANA BY THIS PLAT (SEE ALSO DETAILS, SHEETS #3, #5, #6, #9, #10 AND #12) NEW 1' NO VEHICULAR ACCESS EASEMENT GRANTED BY THIS PLAT FOR INTERIOR GEOMETRY ONLY FINAL PLAT for SAGUARO RESERVE III AT DOVE MOUNTAIN, LOTS 1-236, AND COMMON AREAS "A" (PRIVATE STREETS) AND "B" (OPEN SPACE/DRAINAGE) BEING A SUBDIVISION OF A PORTION OF BLOCK "1 " OF SAGUARO RESERVE I, SEQ. #20211680146, BLOCKS "1" - "4" OF SAGUARO RESERVE II, SEQ. #20222200263, AND A PORTION OF SECTIONS 16 AND 21, T 1 IS, R12E, G&SRM, TOWN OF MARANA, PIMA COUNTY, ARIZONA A-Ailik 3561 E. Sunrise Drive, Suite #225 Tucson, Arizona 85718 (520) 318-1950 Fax (520) 318-1930 Baker & Associates Engineering, Inc. SEQUENCE # #PRV2403-001 REF.: #PRV2211-001; REF.: PRV2109-005; P RV2102-004; P RV1803-002 JOB #2447.4 DATE: OCTOBER 17, 2024 SHEET 11 OF 13 SEQUENCE # Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 19 of 395 DOVE RESORT PER MAP 62/7f1 N86°00'58"W 659.66' C.A. "B" LOT 197 8344 SF LOT 196 0 0 LOT 176 LOT 175 8547 SF LOT 198 8344 SF ' MATCHLINE - SEE SHEET #11 DOVE MOUKTAilM RESORT PER MAP 62/1777 OLLOCM "Ow X001008H SPEC11 OC LLLA% LOT 174 8431 SF C299 L37 LOT 170 N8'41 E 237•90 LOT 124 C.A. "8" LOT 199 8344 SF LOT 200 8344 SF COMMON AREA "B" (OPEN SPACE/DRAINAGE) 14,753 SF LOT 171 8491 SF LOT 123 0b 8149 SF LOT 92 LOT 172 8636 SF LOT 122 8392 SF 100 YR. F.P.L. (DEV) /... • LOT 91 COMMON AREA "B" (OPEN SPACE/DRAINAGE) LOT 173 8636 SF LOT 121 8392 SF (00 LOT 90 \ C213\ C164 \r, \( \ � 8392LOT 1 S0 \-21 \� o \ O COMMON AREA "B" (OPEN SPACE/DRAINAGE) LOT 89 \ z. 0 40 SCALE IN FEET LOT 204 8344 SF LOT 119 8392 SF COMMON AREA "B" (OPEN SPACE/DRAINAGE) L96 LOT 88 \ LOT 87 \ /01 LOT 86 LOT 205 8344 SF 100 YR. F.P.L. (DEV) L9-1 LOT 85 LOT 206 8344 SF L98\ EASEMENT KEYNOTES NEW 10' UTILITY EASEMENT GRANTED TO THE PUBLIC AND PRIVATE ROADWAY MAINTENANCE & SIGNAGE EASEMENT GRANTED TO THE HOMEOWNER'S ASSOCIATION BY THIS PLAT NEW SIGHT VISIBILITY TRIANGLE ("SVT") EASEMENT AREA GRANTED TO THE TOWN OF MARANA BY THIS PLAT (SEE ALSO DETAILS, SHEETS #3, #5, #6, #9, #10 AND #12) NEW 1' NO VEHICULAR ACCESS EASEMENT GRANTED BY THIS PLAT LOT 207 8344 SF LOT 208 8344 SF COMMON AREA "B" (OPEN SPACE/DRAINAGE) 266,627 SF LOT 209 100 YR. F.P.L. (DEV) C325 \ 0 40 SCALE IN FEET C.A. "B" 1>.‘* ox. 44. DOVE MOMlnvl7/QBH RESORT PER MAP 622/7`l C3LL000I we' ZOlnvlfInlgs SP CO(;=IIC LLLA% LOT 119 SIGHT VISIBILITY TRIANGLE ("SVT") - B7 AND B8 DETAIL — COMMON AREA "8" (NEAR LOTS 119 AND 173) FOR INTERIOR GEOMETRY ONLY 278 CFS (DEV) MATCHLINE - SEE SHEET #6 C.A. "8" DOVE ltiVilOMlnvlT/QIIlnv1 RESORT PER MAP 62/7T C.A. "8" FINAL PLAT for SAGUARO RESERVE III AT DOVE MOUNTAIN, LOTS 1-236, AND COMMON AREAS "A" (PRIVATE STREETS) AND "B" (OPEN SPACE/DRAINAGE) BEING A SUBDIVISION OF A PORTION OF BLOCK "1 " OF SAGUARO RESERVE I, SEQ. #20211680146, BLOCKS "1" - "4" OF SAGUARO RESERVE II, SEQ. #20222200263, AND A PORTION OF SECTIONS 16 AND 21, T 1 IS, R12E, G&SRM, TOWN OF MARANA, PIMA COUNTY, ARIZONA A—Ailik 3561 E. Sunrise Drive, Suite #225 Tucson, Arizona 85718 (520) 318-1950 Fax (520) 318-1930 #PRV2403-001 REF.: #PRV2211-001; REF.: PRV2109-005; P RV2102-004; P RV1803-002 Baker & Associates Engineering, Inc. JOB #2447.4 DATE: OCTOBER 17, 2024 SHEET 12 OF 13 SEQUENCE # SEQUENCE # Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 20 of 395 CURVE TABLE SAGUARO GEOMETRY ONLY BEING o TABLE LOTS 1-236 NUMBER DELTA ANGLE RADIUS ARC LENGTH NUMBER DELTA ANGLE RADIUS ARC LENGTH NUMBER DELTA ANGLE RADIUS ARC LENGTH NUMBER DELTA ANGLE RADIUS ARC LENGTH NUMBER DIRECTION DISTANCE NUMBER DIRECTION DISTANCE C1 06°51 '52" 1011.00 121.12 C 101 0748'43" 479.00 65.31 C201 03°55'14" 994.00 68.02 C301 00° 12'46" 387.00 1.44 Li S59°07'35 "W 20.00' L71 N89°50'33"W 71.28' C2 83°16'22" 25.00 36.33 C102 0748'43" 479.00 65.31 C202 03°55'14" 994.00 68.02 C302 0254'34" 561.00 28.49 L2 S30°52'25"E 42.00' L72 N19°43'22"W 40.08' C3 04°54140" 221.00 18.94 C103 0737'16" 479.00 63.71 C203 01 °22'08" 994.00 23.75 C303 01 °37'00" 688.00 19.41 L3 N59°07'35"E 29.25' L73 N44°05'03"E 107.44' C4 02°24136" 179.00 7.53 C104 0748'43" 352.00 47.99 C204 03°55'14" 994.00 68.02 C304 06°01 '45" 387.00 40.72 L4 S05°24'53"W 42.00' L74 N79°32'03"E 69.24' C5 94°07101 " 25.00 41.07 C 105 0748'43" 352.00 47.99 C205 01 °22'08" 867.00 20.71 C305 11 °08'46" 221.00 42.99 L5 N22°37'44 "W 42.00' L75 S58°59'08 "W 78.78' C6 34°30156" 1011.00 609.04 C106 0737'16" 352.00 46.82 C206 105°53'15" 25.00 46.20 C306 11 °08'46" 348.00 67.70 L6 S42°33'05"W 42.74' L76 S67°20'43"W 97.96' C7 81°42'01" 25.00 35.65 C107 05°23'49" 521.00 49.08 C207 00°52'47" 825.00 12.67 C307 04°17'46" 348.00 26.09 L7 S67°22'16"W 25.00' L77 S37°53'52"W 32.60' C8 93° 11 '03" 25.00 40.66 C108 05°23'49" 521.00 49.08 C208 27°09'01 " 514.00 243.57 C308 04° 17'46" 221.00 16.57 L8 S67°22' 16 "W 25.00' L78 N55°49'22 "E 115.65' C9 09°45103" 1011.00 172.06 C109 05°23'49" 521.00 49.08 C209 09°22'39" 352.00 57.61 C309 15°26'32" 179.00 48.24 L9 S67°22'16"W 19.75' L79 S30°26'01 "W 81.06' C 10 11 °35'34" 561.00 113.51 C 110 05°23'49" 521.00 49.08 C210 07°04'52" 352.00 43.50 C310 03°53'24" 221.00 15.00 L 10 N22°37'44 "W 20.00' L80 S52°48'09 "W 249.47' C11 18°35'50" 519.00 168.46 C111 05°23'49" 521.00 49.08 C211 09°22'39" 352.00 57.61 C311 17°07'56" 25.00 7.48 L11 N67°22'16"E 12.16' L81 N83°13'32"W 109.60' C12 19°54138" 225.00 78.19 C112 05°23'49" 521.00 49.08 C212 03°28'33" 479.00 29.06 C312 17°47'39" 25.00 7.76 L12 S67°22'16"W 12.16' L82 S46°2720"W 64.73' C13 15°47138" 900.00 248.09 C113 05°23'49" 521.00 49.08 C213 102°25'09" 25.00 44.69 C313 18°38'43" 514.00 167.27 L13 S81 °30'41 "W 18.85' L83 N25°21 '23"E 23.49' C14 32°59'02" 90.00 51.81 C114 05°23'49" 521.00 49.08 C214 09°22'39" 479.00 78.40 C314 00°48'49" 1011.00 14.36 L14 N81 °30'41 "E 18.85' L84 S39°20'55 "W 188.13' C15 66°31'40" 215.00 249.64 C115 05°23'49" 521.00 49.08 C215 09°22'39" 479.00 78.40 C315 00°53'03" 1011.00 15.60 L15 N67°22'16"E 11.94' L85 S40°06'10"W 108.34' C16 26°37'57" 190.00 88.32 C116 00°59'23" 521.00 9.00 C216 08°01 '56" 479.00 67.15 C316 02°42'48" 1011.00 47.88 L16 N67°22' 16 "E 11.94' L86 S75°33'42 "E 50.32' C17 20°08'54" 1050.00 369.24 C117 07°48'43" 352.00 47.99 C217 06°04'36" 556.00 58.97 C317 02°38'37" 1011.00 46.65 L17 S67°22' 16 "W 15.13' L87 S44° 14'20 "W 160.71' C18 06°08' 13" 200.00 21.42 C118 07°48'43" 352.00 47.99 C218 06°04'36" 556.00 58.97 C318 08°54'46" 1011.00 157.27 L18 S87°31 ' 10 "W 32.12' L88 S59° 19'57"W 51.74' C19 29°03'53" 535.00 271.39 C119 07°48'43" 352.00 47.99 C219 06°04'36" 683.00 72.44 C319 00°48'55" 1011.00 14.38 L19 S87°31 '1 0"W 12.00' L89 S88°58'26 "E 58.94' C20 28°01 '09" 540.00 264.07 C120 07°48'43" 352.00 47.99 C220 06°04'36" 683.00 72.44 C320 00°51 '52" 1011.00 15.25 L20 S02°28'50 "E 12.24' L90 S71 °36'55 "W 49.91 ' C21 36°26137" 500.00 318.03 C121 07°48'43" 352.00 47.99 C221 06°04'36" 683.00 72.44 C321 51°05'02" 651.00 580.42 L21 S08°01'23"E 11.24' L91 N46°08'16"W 52.80' C22 07°48'21 " 200.00 27.25 C 122 02°01 ' 19" 352.00 12.42 C222 06°04'36" 683.00 72.44 C322 23° 14'43" 349.00 141.59 L22 S08°01 '23 "E 14.89' L92 S34°44' 17'W 53.44' C23 15°26'32" 200.00 53.90 C 123 05°23'49" 648.00 61.04 C223 06°04'36" 556.00 58.97 C323 06° 13'08" 514.00 55.79 L23 S87°31 ' 10 "W 14.39' L93 N43°51 '44 "E 486.15' C24 05°32133" 200.00 19.35 C124 05°23'49" 648.00 61.04 C224 06°04'36" 556.00 58.97 C324 02°09'09" 1448.00 54.40 L24 S08°01'23"E 20.00' L94 N85°03'14"W 42.05' C25 40°22123" 846.00 596.13 C125 05°23'49" 648.00 61.04 C225 06°04'36" 556.00 58.97 C325 10°23'18" 215.00 38.98 L25 S08°01'23"E 20.00' L95 N60°09'42"E 151.04' C26 39°25110" 540.00 371.52 C126 05°23'49" 648.00 61.04 C226 06°04'36" 683.00 72.44 C326 15°57'48" 1451.00 404.27 L26 S68°25'01 "W 4.25' L96 S87°57241 109.62' C27 51 °33'09" 200.00 179.95 C127 05°23'49" 648.00 61.04 C227 06°04'36" 683.00 72.44 C327 14°52'39" 1460.00 379.11 L27 S68°25'01 "W 9.32' L97 N68°25'01 "E 111.43' C28 58°47'55" 535.00 549.03 C 128 05°23'49" 648.00 61.04 C228 06°04'36" 683.00 72.44 C328 13°26'38" 514.00 120.60 L28 S68°25'01 "W 9.32' L98 S 16°21 '00 "E 42.73' C29 51 °05'02" 500.00 445.79 C 129 05°23'49" 648.00 61.04 C229 06°04'36" 683.00 72.44 C329 06°04'36" 683.00 72.44 L29 S85°03' 14 "E 5.00' L99 N61 ° 14'56 "E 173.71' C30 26°31 '45" 500.00 231.51 C130 05°23'49" 648.00 61.04 C230 06°04'36" 683.00 72.44 C330 01 ° 13'09" 556.00 11.83 L30 S85°03' 14 "E 1.22' L100 N73°39'00 "E 127.00' C31 02° 11 '24" 200.00 7.64 C131 00°59'23" 648.00 11.19 C231 06°04'36" 556.00 58.97 C331 02°09'09" 1448.00 54.40 L31 S85°03' 14 "E 1.22' L 101 N 16°25'25 "W 31.95' C32 20°08154" 1300.00 457.15 C132 07°48'43" 479.00 65.31 C232 06°04'36" 556.00 58.97 FOR INTERIOR �<<, - L32 N59°07'35 "E 11.61' L102 S81 °26'56 "W 44.41' C33 09°07'49" 200.00 31.87 C133 07°48'43" 479.00 65.31 C233 06°04'36" 556.00 58.97 L33 N59°07'35"E 15.19' L103 S30°03261 50.10' C34 33°51 '02" 540.00 319.03 C134 07°48'43" 479.00 65.31 C234 06°04'36" 556.00 58.97 L34 S43°41 '03"W 7.95' L104 S69°39'49 "E 107.02' C35 02°09'09" 1448.00 54.40 C135 07°48'43" 479.00 65.31 C235 06°04'36" 556.00 58.97 L35 S43°41 '03"W 10.00' L105 S68° 19'21 "W 73.02' C36 02°09'09" 1448.00 54.40 C136 07°48'43" 479.00 65.31 C236 08°27'15" 519.00 76.58 L36 S43°41'03"W 10.00' L106 N30°54'55"E 97.58' C37 02°09'09" 1448.00 54.40 C137 07°48'43" 479.00 65.31 C237 08°27'15" 392.00 57.84 L37 N81 °30'41 "E 14.11' L107 N58°09'18"E 39.96' C38 02°09'09" 1448.00 54.40 C138 02°01'19" 479.00 16.90 C238 04°24'17" 392.00 30.14 L38 N81°30'41"E 8.61' L108 S73°56201 132.55' C39 02°09'09" 1448.00 54.40 C139 02° 11 '24" 479.00 18.31 C239 04°24' 17" 519.00 39.90 L39 N81 °30'41 "E 8.61 ' L109 S58°44' 17"W 268.53' C40 02°09'09" 1448.00 54.40 C140 01°31'14" 521.00 13.83 C240 02°19'15" 556.00 22.52 L40 N89°11'48'W 63.05' L110 S82°27'38"W 197.91' C41 01 ° 17'59" 1448.00 32.85 C141 03° 17'02" 352.00 20.17 C241 02° 19' 15" 683.00 27.66 L41 S83°00'20 "W 26.81 ' L111 N83°46'07"W 127.75' C42 02°09'09" 1321.00 49.63 C 142 03° 17'02" 479.00 27.45 C242 08°33'34" 514.00 76.79 L42 N87°31 '10"E 16.68' L112 S70°34'29 "W 115.78' C43 02°09'09" 1321.00 49.63 C 143 04°23'27" 648.00 49.66 C243 08°33'34" 514.00 76.79 L43 S42°33'05 "W 253.65' L113 S21 °33'25 "E 74.92' C44 02°09'09" 1321.00 49.63 C 144 04°23'27" 521.00 39.93 C244 08°33'34" 514.00 76.79 L44 S63°44'23"W 184.71' L114 N74°07'53"W 46.90' C45 02°09'09" 1321.00 49.63 C145 47°52'11" 179.00 149.55 C245 05°50'07" 561.00 57.14 L45 S51°42'54"W 92.65' L115 S83°17'44"W 94.23' C46 02°09'09" 1321.00 49.63 C 146 12°25'34" 221.00 47.93 C246 00° 12'46" 514.00 1.91 L46 N51 °40'04 "E 178.23' L116 S32°21 '38 "W 183.42' C47 02°09'09" 1321.00 49.63 C147 12°25'34" 221.00 47.93 C247 06°01'24" 561.00 58.98 L47 S25°48'09'W 28.67' L117 S42°3621 "W 203.38' C48 02°09'09" 1321.00 49.63 C 148 12°25'34" 221.00 47.93 C248 06°01'24" 561.00 58.98 L48 NO3°49'41 "E 29.10' L118 S70° 16'56 "E 89.67' C49 02°09'09" 1321.00 49.63 C149 11°24'18" 221.00 43.99 C249 06°01'24" 561.00 58.98 L49 S12°29'39"E 60.59' L119 S54°51'20"W 49.37' C50 01°17159" 1321.00 29.97 C150 12°25'34" 348.00 75.47 C250 06°01'24" 561.00 58.98 L50 S08°01'23'E 45.79' L120 S03°27'37"W 97.19' C51 02°27'18" 1279.00 54.80 C151 02°52'10" 348.00 17.43 C251 06°01'24" 561.00 58.98 L51 N13°36'39"W 124.35' L121 S43°03'59"W 276.94' C52 02°27118" 1279.00 54.80 C152 02°52'10" 221.00 11.07 C252 68°03'17" 25.00 29.69 L52 N16°21'00"W 113.52' L122 N66°20'48"E 34.29' C53 02°27'18" 1279.00 54.80 C153 03°40'58" 179.00 11.51 C253 08°27'15" 519.00 76.58 L53 S37°38'47'E 137.69' L123 S70°21'34"E 23.94' C54 02°27'18" 1279.00 54.80 C154 01°01'16" 221.00 3.94 C254 08°27'15" 519.00 76.58 L54 N56°54'47"W 184.09' L124 S23°17'19"W 47.73' C55 02°27'18" 1279.00 54.80 C155 12°25'34" 348.00 75.47 C255 08°27'15" 519.00 76.58 L55 N39°14'47"E 57.64' L125 N70°47'45"W 23.34' C56 00°33128" 1279.00 12.45 C156 12°25'34" 348.00 75.47 C256 08°27'15" 392.00 57.84 L56 S43°41'03"W 43.22' L126 NO2°28'50"W 9.00' C57 02°26127" 1279.00 54.48 C157 12°25'34" 348.00 75.47 C257 08°27'15" 392.00 57.84 L57 S47°05'57"W 96.36' for MOUNTAIN n (PRIVATE DRAINAGE) STREETS) " OF SAGUARO SAGUARO COUNTY, Inc. 318-1950 DATE: C58 02°26127" 1279.00 54.48 C 158 02° 11 '24" 352.00 13.45 C258 08°27' 15" 392.00 57.84 L58 S43°41 '03"W 27.61 ' C59 00°33155" 1279.00 12.62 C159 07°48'43" 352.00 47.99 C259 08°27'15" 519.00 76.58 L59 S13°48'43"E 28.66' C60 02°26127" 1152.00 49.07 C160 01°31'14" 648.00 17.20 C260 08°27'15" 392.00 57.84 L60 N35°4926"W 29.56' C61 00°33155" 1152.00 11.37 C161 05°23'49" 648.00 61.04 C261 08°27'15" 392.00 57.84 L61 S36°45'41 "W 160.40' C62 02°27'18" 1152.00 49.36 C162 06°28'39" 521.00 58.90 C262 08°27'15" 519.00 76.58 L62 N15°27'19"W 46.72' C63 02°27'18" 1152.00 49.36 C163 06°28'39" 521.00 58.90 C263 02°55'25" 519.00 26.48 L63 S22°37'44"E 17.00' C64 02°27'18" 1152.00 49.36 C164 01°05'32" 521.00 9.93 C264 102°31'00" 25.00 44.73 L64 N67°22'16"E 219.75' C65 02°27118" 1152.00 49.36 C165 06°28'39" 521.00 58.90 C265 12°31'00" 561.00 122.55 L65 S48°57'07"W 146.69' C66 02°27'18" 1152.00 49.36 C166 06°28'39" 521.00 58.90 C266 06°01'24" 561.00 58.98 L66 N82°32'15"E 102.81' C67 16°58'44" 25.00 7.41 C167 04°26'34" 521.00 40.40 C267 06°01'24" 688.00 72.33 L67 N74°26'40"W 37.72' C68 53°20123" 60.00 55.86 C 168 04°26'34" 648.00 50.25 C268 03°06'50" 561.00 30.49 L68 N87°31 '10"E 119.81' C69 56°22130" 60.00 59.04 C 169 06°28'39" 648.00 73.26 C269 06°01'24" 688.00 72.33 L69 N87°31 '10"E 119.81 ' C70 02°26127" 60.00 2.56 C170 06°28'39" 648.00 73.26 C270 06°01'24" 561.00 58.98 L70 N67°3624"W 57.24' C71 51°53112" 187.00 169.35 C171 06°28'39" 648.00 73.26 C271 06°01'24" 688.00 72.33 A SEQ. SEQ. T RESERVE LINE C72 39°56129" 187.00 130.36 C172 06°28'39" 648.00 73.26 C272 08°27'16" 519.00 76.58 C73 07°40149" 187.00 25.07 C173 06°04'36" 556.00 58.97 C273 08°27'16" 392.00 57.84 C74 17°52135" 60.00 18.72 C 174 06°04'36" 683.00 72.44 C274 01 °22'05" 519.00 12.39 FINAL 111 AT AREAS PLAT DOVE nA SPACE OF " » 1 PORTION OF MARANA, #225 Tucson, C75 73°01 '1 6" 25.00 31.86 C 175 06°04'36" 556.00 58.97 C275 07°05' 11 " 519.00 64.19 C76 05°32133" 179.00 17.32 C 176 06°04'36" 683.00 72.44 C276 08°27'16" 392.00 57.84 C77 05°32'33" 221.00 21.38 C 177 06°04'36" 556.00 58.97 C277 08°27'16" 519.00 76.58 C78 01°52107" 1152.00 37.57 C178 06°04'36" 683.00 72.44 C278 08°27'16" 392.00 57.84 C79 02°26127" 1152.00 49.07 C 179 04°49'23" 825.00 69.45 C279 03°03'22" 519.00 27.68 C80 72° 12'21 " 25.00 31.51 C 180 04°49'23" 825.00 69.45 C280 08°55'22" 387.00 60.27 C81 90°00'00" 25.00 39.27 C181 04°49'23" 825.00 69.45 C281 06°58'10" 387.00 47.08 C82 01°52107" 1279.00 41.71 C182 04°49'23" 825.00 69.45 C282 04°59'15" 688.00 59.89 C83 01 °37'44" 1321.00 37.55 C 183 04°49'23" 825.00 69.45 C283 04°49'23" 688.00 57.91 C84 01 °37'44" 1448.00 41.17 C 184 04°49'23" 825.00 69.45 C284 04°49'23" 688.00 57.91 C85 04°22143" 221.00 16.89 C 185 04°49'23" 825.00 69.45 C285 04°49'23" 688.00 57.91 C86 05°19'39" 556.00 51.70 C186 01°38'42" 825.00 23.69 C286 04°49'23" 688.00 57.91 C87 84°46'01" 25.00 36.99 C187 03°55'14" 867.00 59.33 C287 04°49'23" 688.00 57.91 C88 23°57'31" 514.00 214.93 C188 03°55'14" 867.00 59.33 C288 04°49'23" 688.00 57.91 C89 103°33'36" 25.00 45.19 C189 03°55'14" 867.00 59.33 C289 00°24'37" 688.00 4.93 C90 03°56'54" 221.00 15.23 C190 03°55'14" 867.00 59.33 C290 08°33'34" 387.00 57.81 C91 05°27 42 25.0039.11 C 191 00°39 14 867.00 59.33 C291 04°33 24 387.00 57.81 AND COMMON n AND Bn SUBDIVISION OF ,20211680146, #20222200263, 1 1 S, R 12E G&SRM, ASP Baker 3561 REF.: #PRV2211-001; PRV2102-004; PRV1803-002 092 05°23'49" 521.00 49.08 C 192 00°39'39" 867.00 110.00 0292 04°35'23" 387.00 31.00 C93 05°23'49" 521.00 49.08 C 193 03°55'14" 867.00 59.33 C293 06°01 '24" 688.00 72.33 (OPEN RESERVE I, RESERVE II, 16 AND 21, ARIZONA Fax (520) 318-1930 OCTOBER 17, 2024 SHEET 13 OF 13 C94 05°23'49" 521.00 49.08 C 194 03°55'14" 867.00 59.33 C294 06°01 '24" 688.00 72.33 A PORTION BLOCKS AND A TOWN & Associates E. Sunrise Drive, Suite REF.: PRV2109-005; BLOCK "1 » �� - 4 OF OF SECTIONS PIMA Engineering Arizona 85718 (520) JOB #2447.4 C95 05°23'49" 521.00 49.08 C195 08°29'11" 867.00 128.41 C295 06°01'24" 688.00 72.33 C96 00°32'59" 521.00 5.00 C 196 58°39'20" 25.00 25.59 C296 06°01 '24" 688.00 72.33 C97 05°23'49" 648.00 61.04 C197 03°55'14" 994.00 68.02 C297 06°01'24" 688.00 72.33 �0 LA%,'�s e, r" s <C` �o _ v:i _.? fPs'19ned . , C98 05°23'49" 648.00 61.04 C198 03°55'14" 994.00 68.02 C298 02°39'36" 561.00 26.04 C99 05°2349» 648.00 61.04 C199 03°55 14 994.00 68.02 C299 00°5704» 352.00 5.84 0100 05°23 49 648.00 61.04 0200 03°55 14 994.00 68.02 0300 05°50 07 688.00 70.07 #PRV2403-001 SEQUENCE # SEQUENCE # Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 21 of 395 MARANA BLUE AGAVE II AT DOVE MOUNTAIN LOTS 193-256 E3 BLOCK s BLUE AGAVE AT DOVE MOUNTAIN, LOTS s-s92 111111 ,11111111111111 111111iii 111111111111. 1,000 500 0 500 By: SSR Dale: 10/23/2024 SAGUARO RESERVE 11 AT DOVE MOUNTAIN LOTS s-292 SAGUARO RESERVE I / AT DOVE MOUNTAIN 4 ( LOTS s-38,41-173 I0 BOULDER BRIDGE PASS IV AT DOVE MOUNTAIN, LOTS 73-78 saw �• '., BOULDER BRIDGE PASS III AT DOVE MOUNTAIN, LOTS 1-72 (AMENDED) Project Area BOULDER BRIDGE PASS II AT DOVE MOUNTAIN (8 �1111111111 ����ii MOW DOVE MO3UNBTAIN 111111AT s-4S4 �11111 LOTS 8 GOLDEN BARREL PLACE AT DOVE MOUNTAIN (s-s 72) DEL WEBB AT DOVE MOUNTAIN 1V LOTS 13S•343, AND BLOCK "i" Marana Town Council Regular Meeting Agenda Packet BOULDER CANYON AT DOVE MOUNTAIN, LOTS >< - s8 BOULDER BRIDGE PASS III AT DOVE MOUNTAIN (1-99) BOULDER BRIDGE Ir 9-1j/. - PASS AT DOVE % MOUNTAIN (1-88) . 1� IIIDOVE MO'UN 0 1 /%;�I ..401 j es!I:ii11111111t11 ,�• �� ' �� AT DOVE `, �I 1'� MOUNTAIN VII �l;ilC LOTS 455-553 � ����� � I.•Ji_...- AN *:iiiiiiVIJ DEL WEBB DEL WEBB AT DOVE MOUNTAIN (1-100) DEL WEBB AT DOVE MOUNTAIN IX LOTS s96-62s DEL WEBB AT DOVE MOUNTAIN II (1o9-167) DEL WEBB AT DOVE MOUNTAIN III LOTS 129 U s6�34, BLOCKS f El 2 DEL WEBB AT DOVE MOUNTAIN V LOTS 344-384 11111 111111 LOS SAGUAROS AT DOVE MOUNTAIN LOTS 1-133 DOVE MOUNTAIN RESORT (2-1s3) SAGUARO FOREST AT DOVE MOUNTAIN (1-28, 57-89, so6) LOS SAGUAROS AT DOVE MOUNTAIN LOTS 1-133 LOS SAGUAROS AT DOVE MOUNTAIN LOTS 134-239 Page 22 of 395 MARANA Development Services / maranaplanninq@maranaAZ.gov 11555 West Civic Center Drive / Marana, AZ 85653 Ph (520) 382-2600 / Fax (520) 382-2641 / maranaAZ.gov PROJECT APPLICATION APPLICATION TYPE ❑ Annexation ❑ Development Plan ❑ Development ❑ Rezone 0 Minor Land Division 0 Significant 0 Specific Plan ❑ Landscape Plan 0 Native 0 Variance 0 Hydraulic Model 0 Sewer CI Plat 0 Improvement Plan 0 Report PROJECT INFORMATION Plan Package ❑ General Plan Amendment Land Use Change 0 Conditional Use Permit Plant Plan/Exception ❑ SWPP Capacity Assurance 0 Sign Program (Type): 0 Other: Project Name: Saguaro Reserve III at Dove Mountain Description of Project: Single Family Residential Subdivision Number of Lots: 235 Parcel No.(s): Portion of 218-22-002U, -002T, -002J, -1760, -183K, -183L Gross Area (Acres): 81.9 Project Address: 15000 N. Dove Mountain Blvd., Marana, AZ 85658 Ref. Project No.: PRV2109-005, PRV2102-004, PRV1803-002 CONTACT INFORMATIO 1 Owner: Landmark Title Trust 18379 Contact Name: c/o Cottonwood Prop./Bill Hallinan Address: 3567 E. Sunrise, Suite 219 City: Tucson State: AZ Zip: 85718 Email: bhallinan@cottonwoodproperties.com Phone No.: (520) 299-8424 Applicant: Baker & Assoc. Engineering Contact Name: Marty Magelli Address: 3561 E. Sunrise, Suite 225 City: Tucson State: AZ Zip: 85718 Email: marty@baetucson.com Phone No.: (520) 318-1950 Consultant/Engineer: Baker & Assoc. Engineering Contact Name: Marty Magelli Address: 3561 E. Sunrise, Suite 225 City: Tucson State: AZ Zip: 85718 Email: marty@baetucson.com Phone No.: (520) 318-1950 OWNER/APPLICANT AUTHORIZATION - I hereby certify that the information set knowledge and that I am either the owner owner to file this application. (If applicant William Hallinan forth in this application are true and of the property or that I have been is notthe owner, attach written authorization Cal/ "'Z �`'! correct to the best of my authorized in writing by the from the owner.) 3 ity(ozLi' Applicant Name (PRINT) Signature ' Date FOR OFFICIAL USE ONLY Date Received Project No. Revision Date 03/29/2019 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 23 of 395 46,, MARANA AZ ESTABLISHED 1 9 7 7 Council -Regular Meeting Meeting Date: 11/19/2024 To: Mayor and Council From: Kimberly Baker, Financial Manager Date: November 19, 2024 Strategic Plan Focus Area: Not Applicable C2 Subject: Resolution No. 2024-102: Relating to Utilities; approving and authorizing the Mayor to sign an amendment to the Intergovernmental Agreement, effective December 1, 2024, between the Town of Marana and Pima County for provision of water consumption data and sewer user account billing services (Kim Baker) Discussion: On November 17, 2020, the Town Council approved Resolution No. 2020-121, authorizing the Town to enter into an intergovernmental agreement (IGA) with Pima County for the provision of water consumption data and sewer user account billing services. Based on this IGA between Pima County and the Town of Marana, the Marana Water Department processes billing for Pima County Regional Wastewater Reclamation Department (RWRD) customers each month and transfers appropriate data and revenues to RWRD. For this service, the Town collected $1.59 per month per customer account processed without exceeding $65,000.00 (the Maximum Yearly Limit) annually. The IGA has a two-year term with up to four optional one-year extensions following the initial term. Amendment number one under this IGA, effective on December 1, 2022, established a revised user fee of $1.86 per month per customer account processed, and the Maximum Yearly Limit increased to $85,000.00 annually. Amendment number two under this IGA, effective December 1, 2023, established a revised user fee of $2.08 per month per customer account processed, and the Maximum Yearly Limit increased to $100,000.00 annually. The 2023 amendment to the original agreement expires on November 30, 2024. Marana Water Department staff has negotiated a new billing rate for the upcoming year. Marana Town Council Regular Meeting Agenda Packet Page 24 of 395 November 19, 2024 Pursuant to the proposed new amendment, which is attached as Exhibit A to the resolution accompanying these agenda materials, the rate will increase from $2.08 to $2.09 per month per customer account processed, and the Maximum Yearly Limit will increase from $100,000 to $102,000.00 annually. Under the proposed amendment, the IGA will be extended through November 30, 2025. Financial Impact: The revenue resulting from the amendment is included in the Water Department's revenue forecasting on an annual basis and helps toward the recovery of costs associated with the administration of the IGA terms. Staff Recommendation: Staff recommends adoption of Resolution No. 2024-102, approving and authorizing the Mayor to sign an amendment to the intergovernmental agreement, effective December 1, 2024, between the Town of Marana and Pima County for provision of water consumption data and sewer user account billing services. Suggested Motion: I move to adopt Resolution No. 2024-102, approving and authorizing the Mayor to sign an amendment to the Intergovernmental Agreement, effective December 1, 2024, between the Town of Marana and Pima County for provision of water consumption data and sewer user account billing services. Attachments Resolution No. 2024-102 Exhibit A to Resolution - IGA Marana Town Council Regular Meeting Agenda Packet Page 25 of 395 November 19, 2024 MARANA RESOLUTION NO. 2024-102 RELATING TO UTILITIES; APPROVING AND AUTHORIZING THE MAYOR TO SIGN AN AMENDMENT TO THE INTERGOVERNMENTAL AGREEMENT, EFFECTIVE DECEMBER 1, 2024, BETWEEN THE TOWN OF MARANA AND PIMA COUNTY FOR PROVISION OF WATER CONSUMPTION DATA AND SEWER USER ACCOUNT BILLING SERVICES WHEREAS Pima County operates and maintains a public sanitary sewerage sys- tem and is the designated public sewer system provider for the eastern and southern portions of the Town of Marana; and WHEREAS the Town of Marana is the potable water provider for a portion of the area that receives sewer service from Pima County; and WHEREAS on November 17, 2020, the Town Council approved Resolution No. 2020-121 authorizing the Town to enter into an intergovernmental agreement with Pima County, effective December 1, 2020 (the "IGA"), for the provision of water consumption data and sewer user account billing services; and WHEREAS the IGA is effective for a two-year period with up to four optional, one- year extensions; and WHEREAS the Town and the County exercised the first one-year extension, effec- tive December 1, 2022, and amended the IGA to increase the monthly billing rate for the provision of water consumption data and sewer user account billing services; and WHEREAS the Town and the County exercised the second one-year extension, effective December 1, 2023, and amended the IGA to increase the monthly billing rate for the provision of water consumption data and sewer user account billing services; and WHEREAS the Town and the County are now desirous to exercise the third exten- sion and amend the agreement to further increase the monthly billing rate for the provi- sion of water consumption data and sewer user account billing services; and WHEREAS the Mayor and Town Council find that entering into such an amend- ment is in the best interests of the Town and its citizens. NOW, THEREFORE, BE IT RESOLVED BY THE MAYOR AND COUNCIL OF THE TOWN OF MARANA, ARIZONA, AS FOLLOWS: 00084700.DOCX /2 Resolution No. 2024-102 - 1 - Marana Town Council Regular Meeting Agenda Packet Page 26 of 395 November 19, 2024 SECTION 1. The amendment to the intergovernmental agreement between the Town of Marana and Pima County for provision of water consumption data and sewer user account billing services, substantially in the same form attached to and incorporated by this reference in this resolution as Exhibit A, is hereby approved and the Mayor is hereby authorized and directed to sign it for and on behalf of the Town of Marana. SECTION 2. The Towri s Manager and staff are hereby directed and authorized to undertake all other and further tasks required or beneficial to carry out the terms, obliga- tions, and objectives of the intergovernmental agreement, as amended. PASSED AND ADOPTED BY THE MAYOR AND COUNCIL OF THE TOWN OF MARANA, ARIZONA, this 19th day of November, 2024. Mayor Ed Honea ATTEST: APPROVED AS TO FORM: David L. Udall, Town Clerk Jane Fairall, Town Attorney 00084700.DOCX /2 Resolution No. 2024-102 -2- Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 27 of 395 Exhibit A to Marana Resolution No. 2024-102 Pima County Department of Regional Wastewater Reclamation Project: Billing and Collection Services Contractor: Town of Marana Contract No.: CT-WW-21-224 Contract Amendment No.: 3 Orig. Contract Term: 12/01/2020 — 11/30/2022 Termination Date Prior Amendment: 11/30/2024 Termination Date This Amendment: 11/30/2025 Orig. Amount: Prior Amendments Amount: This Amendment Amount: Revised Total Amount: $130,000.00 $185,000.00 $102,000.00 $417,000.00 INTERGOVERNMENTAL AGREEMENT AMENDMENT WHEREAS, Pima County ("County") and the Town of Marana ("Town") entered into an Intergovernmental Agreement ("IGA") on December 1, 2020 for services as referenced above; and WHEREAS, County and Town, pursuant to Section 4, have agreed to extend the term of the IGA for the third of four one-year renewal periods, and WHEREAS, County and Town have agreed to increase the total contract amount to allow County payment to Town for the continued provision of sewer billing and collection services to County during the extended term of the IGA. NOW, THEREFORE, it is agreed as follows: 1) Maximum Payment Amount. Section 3 of the IGA is amended as follows: a) The County and Town agree to increase the monthly administration and billing fee, set forth in Section 3(a) and most recently amended in the Second Amendment, from $2.08 to $2.09 per customer per month for the purpose of reimbursing Town for the cost of billing and collection services. b) The maximum amount County will spend under this IGA, as set forth in Section 3(b), is increased by $102,000.00. County's total payments to Town under this IGA, including any sales taxes, will not exceed $417,000.00. 2) Term. County is exercising the third extension option to renew the contract for one additional year commencing on December 1, 2024, and terminating on November 30, 2025. If the commencement date is before the Effective Date of this amendment, the parties will, for all purposes, deem the amendment to have been in effect as of the commencement date. Contract No.: CT-WW-21-224-03 1 Form Revised 9/19/24 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 28 of 395 Exhibit A to Marana Resolution No. 2024-102 3. Counterparts. This Agreement may be executed in counterparts, each of which when fully executed and delivered will constitute a duplicate original. All counterparts together shall constitute a single agreement. All other provisions of the Contract not specifically changed by this Amendment remain in effect and are binding upon the parties. PIMA COUNTY TOWN OF MARANA Adelita S. Grijalva Ed Honea Chair, Board of Supervisors Mayor, Town of Marana Date Date ATTEST ATTEST Melissa Manriquez Clerk of the Board David Udall Town Clerk Date Date Approval as to Content for PCRWRD Approved as to Content for F&RMD Jackson Jenkins, Director, RWRD Director, F&RMD Intergovernmental Agreement Determination The foregoing Intergovernmental Agreement Amendment between Pima County and the Town of Marana has been reviewed by the undersigned, each of whom has determined that it is in proper form and is within the powers an authority granted under the laws of the State of Arizona to the party he or she represents: PIMA COUNTY: TOWN OF MARANA: Bobby Yu, Deputy County Attorney Contract No.: CT-WW-21-224-03 Form Revised 9/19/24 Jane Fairall, Town Attorney 2 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 29 of 395 46,, MARANA AZ ESTABLISHED 1 9 7 7 Council -Regular Meeting C3 Meeting Date: 11/19/2024 To: Mayor and Council Submitted For: Fausto Burruel, Public Works Director From: Dan Grossman, CIP Process Analyst Date: November 19, 2024 Strategic Plan Focus Area: Not Applicable Subject: Relating to Procurement; approving a change order to the contract with Dibble & Associates in the amount of $106,795.15 for the Airport Control Tower, EA (AP031); authorizing the transfer of appropriations if necessary for the change order; and authorizing the Town Manager or designee to execute the necessary documents to effectuate the change order (Fausto Burruel) Discussion: Marana Town Code Section 3-4-7(B) (3) provides that Town Council approval is necessary for change orders that individually or cumulatively exceed the amounts set forth in section 3-4-8(A)(3) of the town code. The budget for fiscal year 2024-2025 was adopted on June 18, 2024, and included the Towri s 5 year CIP program. The Airport Control Tower, Environmental Assessment (AP031) was properly included within the Town of Marana's FY2025 Capital Improvement Plan. Effective April 11, 2023, the Town entered into an agreement with Dibble & Associates to prepare the necessary Planning and Environmental Documentation for a new Airport Traffic Control Tower at the Marana Regional Airport for $220,669.20. Dibble & Associates has requested a change order, in the amount of $106,795.15 due to the following additional requirements and delays from the FAA: • Staff changes at the FAA and protracted review periods of draft documents. Marana Town Council Regular Meeting Agenda Packet Page 30 of 395 November 19, 2024 • The FAA Reauthorization Act of 2024 which requires additional environmental provisions that need to be considered in the final Environmental Assessment. • Additional unforeseen consultation with the National Park Service related to potential visual impacts from the proposed Air Traffic Control Tower. • The need for additional coordination meetings with the project team, the Town and FAA. Financial Impact: This change order will be funded with Airport Capital funding, GL Account # 52592000-8025-AP031. The majority of the funding will be provided by federal and state participation. Below is the breakout: • FAA Portion - $97,248 • ADOT Portion - $4,774 • Town Portion - $4,774 Staff Recommendation: Staff recommends approval of the change order to the Dibble & Associates General Services Agreement for the Airport Control Tower, EA (AP031) project in the amount of $106,795.15. Suggested Motion: I move to approve the change order to the contract with Dibble & Associates in the amount of $106,795.15 for the Airport Control Tower, EA (AP031) project; to authorize the transfer of appropriations if necessary for the change order; and to authorize the Town Manager or designee to execute the necessary documents to effectuate the change order. Attachments Dibble ATCT EA Amendment TO Airport Planning & Enviromental Documentation Marana Town Council Regular Meeting Agenda Packet Page 31 of 395 November 19, 2024 p 602.957.1155 7878 North 16th Street, Suite 300 dibblecorp.com Phoenix, AZ 85020 October 7, 2024 Mr. Galen Beem, Airport Superintendent Marana Regional Airport 11700 W. Avra Valley Road Marana, AZ 85653 RE: GENERAL SERVICES AGREEMENT AIRPORT PROFESSIONAL PLANNING SERVICES Town of Marana Project No: AP031 Planning and Environmental Documentation New Air Traffic Control Tower Marana Regional Airport Dear Mr. Beem: Dibble entered into an agreement with the Town of Marana (Town) under and subject to the terms of the General Service Agreement, dated May 19, 2020 (the "Controlling GSA") to prepare the necessary environmental documentation to advance the construction of an Air Traffic Control Tower (ATCT) at the Marana Regional Airport (AVQ). The Town issued a notice to proceed on April 3, 2023 for this project and subsequent task order term extension (383 calendar days from date executed on November 27, 2023 to add time through December 14, 2024). The Scope of Services for the environmental documentation was divided into two schedules - Schedule A and Schedule B. Schedule A included the necessary planning tasks associated with the documentation leading to a Federal Aviation Administration (FAA) Determination to Prepare an Environmental Assessment (EA) or Environmental Impact Statement (EIS). Schedule B included required tasks associated with the preparation of an EA. The project has been unavoidably delayed for several reasons including the following: • Staff changes at FAA and protracted review periods of draft documents. • The FAA Reauthorization Act of 2024 includes environmental provisions that now need to be considered in the EA. • Additional unforeseen consultation with the National Park Service (NPS) related to potential visual impacts from the proposed ATCT. • The need for additional coordination meetings with the project team, the Town and FAA. DIBBLE Marana Town C Agenda Packet Page 32 of 395 2 Therefore, Dibble has prepared an amendment related to the additional work associated with Schedule B for the completion of the ATCT EA. Dibble's total Not -to -Exceed (NTE) fee per the attached scope of work is: Planning & Environmental Services: 1. Dibble $22,440.00 2. Dibble (direct costs) $0.00 3. SWCA Environmental Consultants $84,355.15 Total Fee = $106.795.15 We look forward to working with you on this important project. If you need additional information or have questions, please do not hesitate to call us at 602-957-1155. Sincerely, Charlie McDermott, LEED AP Aviation Planning Manager, Airport Development Ryan Toner, PE Vice President, Airport Development Practice DIBBLE Marana Town C Agenda Packet Page 33 of 395 MARANA AZ SCOPE OF WORK AMENDMENT DIBBLE New Air Traffic Control Tower Planning and Environmental Documentation Marana Regional Airport In April 2023, Dibble entered into an agreement with the Town of Marana (Sponsor) under and subject to the terms of the General Service Agreement, dated May 19, 2020 (the "Controlling GSA") to prepare the necessary environmental documentation to advance the construction of an Air Traffic Control Tower (ATCT) at the Marana Regional Airport (AVQ). The Scope of Services for the environmental documentation was divided into two schedules — Schedule A and Schedule B. Schedule A included the necessary planning tasks associated with the documentation leading to a Federal Aviation Administration (FAA) Determination to Prepare an Environmental Assessment (EA) or Environmental Impact Statement (EIS). Schedule B included required tasks associated with the preparation of an EA. In general, the project has been unavoidably delayed for several reasons including staff changes at FAA and protracted review periods of draft documents, the FAA Reauthorization Act of 2024 includes environmental provisions that need to be considered in the EA, additional unforeseen consultation with the National Park Service (NPS) related to potential visual impacts from the proposed ATCT and the need for additional coordination meetings with the project team, the Town and FAA. Therefore, Dibble has prepared this scope of work amendment related to the additional work associated with Schedule B for the completion of the ATCT EA pursuant to the requirements of Section 102(2)(c) of the National Environmental Policy Act (NEPA) of 1969 (Public Law 91- 190, 42 United States Code 4321 et. seq.) as outlined in 40 Code of Federal Regulations (CFR) 1500-1508. Marana Regional Airport Planning & Environmental Documentation Dibble Scope of Services October 2024 Page 1 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 34 of 395 Schedule B - Preparation of an Environmental Assessment B1. General B1.1a Project Management and Administration: Dibble will provide additional project management and administration as described in Task B1.1 from the original scope of work for the duration of the EA preparation. Also, the PM shall continue managing all schedules and budgets, including invoicing and maintaining internal Dibble project controls related to staffing, schedules, and budgets. B1.2a Project Meetings: Dibble will facilitate the following meetings: • Additional 6 weekly meetings with the project team and the Sponsor until the draft EA is submitted to FAA. • Additional 12 monthly meetings with the project team and the Sponsor. • Additional 12 monthly meetings with FAA, Sponsor and project team for the duration of the EA. Meetings will be attended by Dibble's Project Manager and Environmental Planner. All meetings will be virtual and are planned to be no longer than one hour. Dibble will prepare and publish draft and final meeting minutes for all meetings. Attachments • SWCA Environmental Scope of Work dated October 1, 2024 END OF SCOPE OF WORK Marana Regional Airport Planning & Environmental Documentation Dibble Scope of Services October 2024 Page 2 Marana Town Council Regular Meeting Agenda Packet Page 35 of 395 November 19, 2024 Firm: Dibble Marana Regional Airport Project: Planning and Environmental Documentation ATCT EA Preparation Schedule B Amendment Date: 10/4/2024 DIBBLE Contract Number: AP031 PO Number: 22300517-01 FAA Number: 3-04-0058-029-23 ADOT Number: E4FSS01E Summary Dibble Subconsultants A. Planning & Environmental Phase Services Fee Type 1 Dibble $22,440.00 Not to Exceed 2 Dibble (Direct Expenses) $0.00 Direct Cost 3 SWCA Environmental Consultants $84,355.15 Not to Exceed $22,440.00 $0.00 $84,355.15 Total $0.00 Total Fee $106,795.15 $22,440.00 $84,355.15 Marana Town Council Regular Meeting Agenda Packet Page 36 of 395 November 19, 2024 Firm: Dibble Marana Regional Airport Project: Planning and Environmental Documentation ATCT EA Preparation Schedule B Amendment Date: 10/4/2024 Contract Number: AP031 PO Number: 22300517.01 FAA Number: 3-04-0058-029-23 ADOT Number: E4FSSO1E DERIVATION OF FEE PROPOSAL SUMMARY Total 2024 Billing Total Classification Labor Hours Rates Costs 1 Principal Engineer 2 $250.00 $500.00 2 Senior Project Manager 54 $230.00 $12,420.00 3 Senior Planner 0 $215.00 $0.00 4 Planner 56 $170.00 $9,520.00 Totals: 112 $ 22,440.00 ALLOWANCE FOR DIRECT COSTS AND SUBCONSULTANTS Item Cost Type of Compensation 1 Direct Expenses $0.00 2 SWCA Environmental Consultants $84,355.15 Direct Cost NTE Sub -Total for Direct Costs $84,355.15 TOTAL FEE $106,795.15 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 37 of 395 Firm: Project: Date: Dibble Marana Regional Airport Planning and Environmental Documentation ATCT EA Preparation Schedule B Amendment 10/4/2024 DI BB Contract Number: AP031 PO Number: 22300517-01 FAA Number: 3-04-0058-029-23 ADOT Number: E4FSSO1E PLANNING AND ENVIRONMENTAL PHASE SERVICES - LABOR HOURS PRINCIPAL ENGINEER SENIOR PROJECT MANAGER SENIOR PLANNER PLANNER TOTAL HOURS BY TASK SCHEDULE B TASKS B.1 General B.1.1a Project Management and Administration 2 24 26 B.1.2a Project Meetings 30 48 78 B.2 Preliminary Engineering Support (25% Design) B.2.1 Preliminary Engineering Design (25%) 0 B.2.2 Construction Activity Estimates 0 B3 Study Components B.3.1 Project Description (Chapter One) 0 B.3.2 Alternatives (Chapter Two) 0 B.3.3 Affected Environment (Chapter Three) 0 B.3.4 Environmental Consequences and Mitigation, if Necessary (Chapter Four) 0 B4 Documentation ' ' B.4.1 Preliminary Draft EA 0 B.4.2 Revised Preliminary Draft EA 0 B.4.3 Draft EA 0 B.4.4 Draft and Final EA Notices 0 B.4.5 Response to Public Comments 0 B.4.6 Final EA 0 B5 Public Outreach lirB.5.1 Public Workshop/Hearing 8 8 B6 Preparation of the Administrative Record B.6.1 Preparation of Administrative Record 0 TOTAL HOURS BY CLASSIFICATION 2 54 0 56 MIn �� F one 112 November 19, 2024 2/36 343 West Franklin Street Tucson, Arizona 85701 Tel 520.325.9194 Fax 520.325.2033 www.swca.com ENVIRONMENTAL CONSULTANTS 71d Scienc reative Solutions.' October 1, 2024 Charlie McDermott, Aviation Planning Manager Dibble 7878 North 16th Street, Suite 300 Phoenix, Arizona 85020-4669 Submitted via email: charlie.mcdermott@dibblecorp.com Re: Marana Regional Airport (AVQ) Air Traffic Control Tower Environmental Assessment / 00065213-000-TUC Dear Charlie McDermott: The Town of Marana requested that SWCA Environmental Consultants (SWCA) prepare a scope of work and cost estimate modification to continue the necessary National Environmental Policy Act (NEPA) and associated resources analyses for the Marana Regional Airport (AVQ) Air Traffic Control Tower Environmental Assessment. Beginning in May 2023 through the present, the Federal Aviation Administration (FAA), Phoenix Airports District Office has required additional services beyond our original scope of work, including preparation of a built environment report and additional cultural resources surveys, additional visual resources and simulation development and consultation, Section 4(f) National Park Service coordination, and meetings not previously covered by the March 17, 2023 Independent Consultant Agreement (ICA). The cost to complete these tasks, as described in the attached scope of work, is a time and materials, not -to -exceed total of $84,355.15. This scope of work includes updated, 2024 staff rates, The cost estimate is valid for 6 months, after which time we reserve the right to create a new cost estimate. Dibble has prepared a Master Scope of Work that outlines project approach to NEPA analysis. This SWCA scope of work relies on the information and assumptions provided in the Dibble Master Scope of Work. Information provided in the attached scope of work is intended to supplement Dibble's Master Scope of Work and provide additional level of detail and assumptions, as necessary, for tasks that will be managed by SWCA as a subconsultant to Dibble. If the scope of work and cost estimate are acceptable to you, please send over Dibble's ICA. We will then return a signed ICA. Please contact me at (520) 402-4127 or theresa.knoblock@swca.com if you have any questions regarding this proposal. Sincerely, /pa - Theresa Knoblock Tucson Senior Office Lead Marana Town Council Regular Meeting Agenda Packet Page 39 of 395 November 19, 2024 SWCA Marana Regional Airport (AVQ) Air Traffic Control Tower Environmental Assessment SCOPE OF WORK This change order has been issued by SWCA Environmental Consultants (SWCA) to reflect changes in the schedule, timing, and staging of deliverables, and requests for additional services outside the original Scope of Work for the Marana Regional Airport (AVQ) Air Traffic Control Tower Environmental Assessment project in Pima County, Arizona. Beginning in May 2023 through the present, the Federal Aviation Administration (FAA), Phoenix Airports District Office (ADO) has required additional services beyond our original scope of work, including preparation of a built environment report and additional cultural resources surveys, additional visual resources and simulation development and consultation, Section 4(f) National Park Service coordination, and meeting coordination amongst the FAA, National Park Service, the Town of Marana (Town), Dibble, and SWCA not previously covered by the March 17, 2023 Independent Consultant Agreement (ICA). SWCA recommended the Town and Dibble support and fulfill these FAA requirements and received approval prior to undertaking our of scope work. Those requirements resulted in substantial research, coordination, and development of FAA materials by the SWCA Project Manager and specialists, as outlined below. SCHEDULE A - PLANNING DOCUMENTATION FOR FAA DETERMINATION All work outlined in SWCA's January 6, 2023, scope of work under Schedule A have been completed. An additional level of effort was required to complete Schedule A due to schedule extension, changes in FAA personnel, and project description changes. No additional scope is being requested; however, remaining budget from the Task B.2.1 was shifted to cover out -of -scope effort. SCHEDULE B - PREPARATION OF AN ENVIRONMENTAL ASSESSMENT TASK B.1.1 PROJECT MANAGEMENT This task provides time for SWCA staff to manage the project, e.g., scheduling, regulatory guidance, project administration, and overall project management and included approximately 1 hour per month for the SWCA Project Manager (PM). This task assumed a project timeline of approximately 12 months. The project was contracted in March 2023, with work beginning in May 2023 and is anticipated to be completed in approximately July 2025, for a total of 27 months. This change order requests an additional 24 hours of PM support, 22 hours of Assistant Project Manager (APM) support, and 8 hours of Project Control and billing support over 15 months. This estimate reflects actual levels of effort being expended per month for project management and coordination. TASK B.1.2 PROJECT MEETINGS The project was anticipated to occur over 12 months and the project management assumptions included 1-hour virtual project meetings facilitated by Dibble and attended by the SWCA PM every 2 weeks during the Schedule B Page 12 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 40 of 395 SWCA Marana Regional Airport (AVQ) Air Traffic Control Tower Environmental Assessment timeframe (estimated at 4 months), for a total of eight meetings and a budget of up to 26 staff -hours (APM/PM level) of meeting support. To date, SWCA has participated in eight meetings for which SWCA prepared agendas, facilitated the meetings, and prepared meeting notes. Please note that resource -specific meetings, such as separate meetings to address comments from the National Park Service or work out project details for the Built Environment report, are included in the resource -specific budgets below. Meetings were generally attended by additional SWCA staff to accommodate resource -specific questions. This change order would cover up to 12 additional meetings from October 2024 through July 2025, as well as covering the additional staff hours in support of project meetings that have already occurred. This change order assumes that all meetings during Schedule B will be attended by up to two SWCA staff, generally the PM and APM. The total number of hours requested in this change order is 44 hours for SWCA staff in Senior Resource or project management roles. TASK B.1.3 STUDY COMPONENTS (ENVIRONMENTAL ASSESSMENT) The FAA authorized the project team to initiate formal preparation of the environmental assessment (EA) on September 16, 2024. The original scope of work assumed that notice -to -proceed on the full scope of Schedule B, including initiation of the EA documentation, would be released at once; however, the FAA requested that specific resource documents and sections be initiated ahead of preparation of the full EA including the biological, visual, and cultural resources analyses. The following additional out -of -scope items are included in this change order: • The FAA requested early preparation and revisions of stand-alone versions of the Project Description and Purpose and Need, as well as a table of "Issues to be considered or dismissed from further analysis" table, and an outline of the EA prior to submittal of the full PDEA. SWCA has completed preparation and revisions of these documents. • The FAA has provided input on their review process and timing for subsequent drafts and revisions of the EA, including preparation of the following documents and FAA reviews: Preliminary Draft EA (one FAA ADO review), Draft EA (one FAA ADO review then one ADO/FAA legal review), and Final EA (one FAA ADO review and one ADO/FAA legal review), for a total of three documents and five rounds of review. • FAA also requested public comments be submitted as soon as received, in addition to the final comment summary. SWCA will coordinate with the Town and FAA on responses as needed. • The Town and FAA requested preparation of Section 4(f) analysis, coordination letters, response to National Park Service comments, and a site visit that were not included in the original scope of work. SWCA is requesting additional budget to cover this level of effort to split up document deliverables, edits, and revisions into specific sections rather than initiating the document as a whole. SWCA has considered the input regarding number and timing of reviews in our estimate. An additional 143 total labor hours are being requested at various staff rates from junior staff up to project manager. Remaining budget will be applied to this task as well. TASK B.2.1 BIOLOGICAL RESOURCES The biological resources evaluation is complete and accepted by the FAA. No further work is necessary for completion of the EA. Remaining budget will be reallocated to cover other services. Page 13 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 41 of 395 SWCA Marana Regional Airport (AVQ) Air Traffic Control Tower Environmental Assessment TASK B.2.2 CULTURAL RESOURCES The cultural resources evaluation and Section 106 has been completed for this project and no further work is necessary for completion of the EA. However, additional services beyond the original scope of work were requested to complete Section 106, including: • Preparation of new Class III surveys and report to cover unsurveyed areas with the area of potential effects (APE). • Preparation of a Built Environment report. • Preparation of Class I tables and figures to support an expanded area of analysis (3-mile viewshed APE) • Conducting an in -person Arizona State Museum Archaeological Records Office search of the expanded 3-mile viewshed APE. • Preparation of a cultural memorandum to support the geotechnical clearance. • Attendance at additional project coordination meetings with the FAA and project team. TASK B.2.3 VISUAL RESOURCES The visual resources analysis has been completed for this project and accepted by the FAA. No further work is necessary for completion of the EA. However, additional services beyond the original scope of work were requested to complete the visual resources analysis, including: • Attendance at meetings to coordinate with Genesis and Dibble regarding project information and data collection. • Fieldwork and documentation to collect day and night photography for the visual simulations. • Changes in the project description following preparation of the initial document (addition of new area related to removal of existing beacon and placement of utilities). • Support responding to National Park Service concerns related to visual impact to potential viewers using the Santa Cruz River Trail, including staff preparation, travel, and attendance at a site visit on July 24, 2024, with the FAA and Town to collect additional data and then prepare summary findings. • SWCA will coordinate and attend 1 follow up meeting with NPS, the Town and Dibble to discuss the proposed signage. TASK B5 PUBLIC OUTREACH No additional scope is requested. TASK B6 PREPARATION OF THE ADMINISTRATIVE RECORD No additional scope is requested. Page 14 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 42 of 395 SWCA Marana Regional Airport (AVQ) Air Traffic Control Tower Environmental Assessment COST ESTIMATE Based on thoughtful consideration of the project requirements and a thorough estimate of the required labor and direct costs, SWCA proposes a time -and -materials budget not to exceed without client approval of $84,355.15 to complete the project as presented in the table below. To accommodate project changes and scheduling, it is assumed that SWCA will be able to use the overall project funding and will not be held to phase and task limits so long as the overall budget is not exceeded. Table 1. Cost Estimate TASK LABOR EXPENSES FEE TYPE TOTAL $ $ $ Schedule A Planning Documentation for FAA Determination Tasks A3, A4, A5.4 SWCA Assistance on Schedule A tasks Schedule B Preparation of an Environmental Assessment Task B.1.1 Project Management 10,382.00 10,382.00 Task B.1.2 Project Meetings 8,236.00 8,236.00 Task B.1.3 Study Components (EA) 17,294.00 17,294.00 Task B.2.1 Biological Resources Task B.2.2 Cultural Resources 28,787.00 632.50 29,419.50 Task B.2.3 Visual Resources 16,964.00 1,208.65 18,172.65 Task B5 Public Outreach Task B6 Administrative Record PROJECT TOTAL ASSUMPTIONS 82,514.00 1,841.15 84,355.15 • The EA will be completed by July 2025, and document deliverables will approximately follow the timeframes outlined in the schedule reviewed by the FAA dated September 9, 2024, with an EA initiation date of September 16, 2024. • Dibble will assist SWCA in preparation of the climate change and floodplains analysis. • No additional revisions to the biological, visual, and cultural resources reports will be required. • No substantial changes in the project description will be made, particularly revisions that expand the project footprint. • SWCA will prepare a draft decision document (FONSI or appropriate document) for FAA use and submit along with the review copy of the Final EA. Page 15 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 43 of 395 Project Budget Summa Rate Schedule: for interval reference and are outside 2024 Rates) area for prr Project Name: Project No.: Marano Airport ATCT EA 61913-00-TUC A 7!" A SWCA V V "®°`"...... of the print Annual Rote Escalation: Project Start (est.): Project End (est.): 0% [Enter Dote Here] [Enter Dote Here] LABOR Totals Phase 03 Phase 06 Phase 07 Total All Phases FM EA Cultural Visual Nome Discipline Short Level Short Discipline Level Rote Hours Charge of Total Project- %of Labor Hrs % of Lbr Charge Hours Charge Hours Charge Hours Charge _ $ - 8 - $ 95.00 $ 137.00 $ 226.00 $ 189.00 $ 189.00 $ 147.00 $ 123.00 $ 137.00 $ 137.00 8 158.00 $ 169.00 $ 147.00 $ 169.00 8 169.00 $ 147.00 8 207.00 $ 189.00 $ 207.00 $ $ 189.00 $ 147.00 $ 230.00 $ 137.00 $ 169.00 $ 137.00 $ $ 77.00 $ - - $ - 8 8.00 $ 760.00 6.00 $ 822.00 0.0% 0.0% 0.9% 1.0% 0.0% 0.0% 1.7% 1.3% 0.0% 0.0% 0.9% 1.0% 0.0% 19.0% 10.5% 0.4% 0.0% 1.2% - $ - 8 $ 190.00 - - 4.00 - $- $ - $ 380.00 $ - 2.00 - 8 $ 190.00 8 - General Biller Accounting - Billing Project Controls Specialist VI 2.00 McFarlane Genelyn PC S06 6.00 8 822.00 Amato, Victoria ER 512 Environmental Resources Planning Specialist XII Specialist X $ 0.0% 0.0% $ $ 10.00 $ 8 1,890.00 Knoblock, Theresa PL S10 83.00 $ 15,687.00 18.6% 10.3% 0.3% 0.0% 1.1 % 1.3% 17.4% 9.6% 0.4% 0.0% 1.5% 1.7% 1.7% 4.2% 57.00 8 10,773.00 16.00 8 3,024.00 Rausch, Ryan PL 510 Planning Environmental Resources Specialist X Specialist VII 46.00 $ 8 694.00 46.00 $ 8 694.00- - 8 - Campbell, Stem, ER 507 2.00 $ 294.00 2.00 $ 294.00 $ - Hergenrother, Robert ER 505 Environmental Resources GIS/CADD Specialist V Specialist VI 7.00 8.00 8.00 20.00 $ - $ 959.00 $ 1,09600 - $ - 8 - Mitchell, Lora GS 506 7.00 $ 959.00 $ - Cox, Kelley 1W 506 Technical Writer/Edior Technical Writer/Editor Specialist VI Specialist VIII 1.3% 8.00 $ 1,096.00 $ - - - $ - $ - Mabe,Cori TN 508 $ 1,264.00 $ 3,380.00 1.5% 1.5% 8.00 $ 1,264.00 $ - Desruisseoux, Danielle 11V 509 Technical Writer/Editor Environmental Resources Specialist IX 4.0% 4.1% 20.00 $ 3,380.00 - $ - - $ - Jordan, Tim ER 507 Specialist VII 20.00 $ 2,940.00 3.5% 4.2% 3.6% 20.00 $ 2,940.00- Barr, David CR 509 Cultural Resources Cultural Resources Specialist IX 51.00 $ 8 619.00 10.2% 10.7% 10.4% 14.3% 0.0% 0.0% 0.2% 0.0% $ 51.00 $ 8,619.00 - - 0 $ toes, Annie CR 509 Specialist IX 70.00 - 1 00 36.00 47.00 4.00 29.00 - - $ _ 11,830.00 $- 8 $ 189 00 $ 7,452.00 14.0% 0.0% 0.0% 0.2% 0.08% 14.7% 0.0% 0.0% 0.2% 0.0% 0.0% 9.9% 0.8% 6.1% 0.0% 0.0% 0.0% 0.0% 6.5% 10.00 8 1,690.00 60.00 $ 10,140.00 Rawson, Paul CR 507 Culturol Resources Cultural Resources Specialist VII Specialist XI - $ - - $ - $ - Herrick, Dan CR 511 8 - - 8 - Tremblay, Adrienne CR 510 Cultural Resources GIS/CADD Speciobst X Specialist XI 1.00 $ 189.00 Ounno Glenn GS S71 4.00 8 828.00 32.00 6,624.00 Planning Specialist X 8 0.0% 0.0% $ - $ - $ 44.00 $ 8 8,316.00 Chapman, Cullen PL 510 $ 8,883.00 I 10.5% 10.8% 0.7% 8.1 % 0.0% 0.0% 0.0%- 0.0% 2.9% 3.00 8 567.00 8 - Branch, Spenser PL 507 Planning Planning Specialist VII Subject Molter Expert I $ 588.00 I 0.7% $ $ - 4.00 26.00 0 588.00 $ 5,980.00 Bockey, Chris PL SM1 $ 6,670.00 _ __ _... $ - $ - 7.9% 0.0% 0.0% 0.0% 0.0% 2.8% 3.00 8 690.00 $ - Openshaw, Garet PL 506 Planning GI Specialist VI Specialist IX $ Sa,pollspall Br GS 506 $ $ 2,387.00 Sawyer, Bryaner PL 506 Planning Specialist VI - $ - Planning 31.00 $ $ 2,387.00 I $ - - $ - Sangerman Drew PL 501 Specialist I $ - - $ - - 477.00 $ - 1 $ 82,514.00 $ - 0.0% 97.8% 0.0% 0.0% 100.0% 0.0% $ 163.00 $ $ - $ 28,787.00 86.00 $ $ 16,964.00 Labor Subtotal 0% 228.00 _ $ 36,763.00 Communication Fee - %of Labor 8 - 8 - 8 Labor Total 477.00 5 82,514.00 97.8% 228.00 $ 36,763.00 163.00 $ 28,787.00 86.00 $ 16,964.00 TRAVEL EXPENSES Description Unit Rate #Units Charge of Total /P of cf d Units Charge d Units Charge #Units Chars• Car / Full S'ae Truck Rental Doily Car / Full Size Truck Rental Weekly Car/ Full Size Truck Rental Monthl Per Day Per Week 70.00 420.00 1,680.00 1.00 - - 2.00 1.00 - 1.00 $ 70.00 8 - $ $ 150.00 $ 200.00 $ $ 781.00 0.1 % 0.0%- 0.0%- 0.2% 0.2% _ _ - 8 - - 2 00 8 - 1.00 8 70.00 Monlhl 4x4Track Daily Lodging/Housing Half Ton, Per Day 75.00 L$ $ - $ 150.00 $ Per 200.00 - $ - 8 - 1.00 $ 200.00 Mileage Airfare Per Mile Rare/ Unit or Lump Sum $ 0.625 $ 781.00 0.0% 0.9% _ - 8 1.00 8 781.00 Travel Expenses Subtotal $ 1,201.00 $ 180.15 1.4% 0.2% $ - $ 150.00 0 1,051.00 Markup 15% $ - $ 22.50 0 157.65 Per Diem perdoy $ 59.00 - $ - 8 1,381.15 0.0% 1.6% $ - .111 $ - - $ - $ 1 208.65 Travel Expenses Total $ - $ 172.50 OTHER EXPENSES Description Rate 8 Units Charge %ol Total Project nits Charge #Unit s Charge Perin-7 Postage Markup Rare/Unit or Lump Sum $ 400.00 $ - 15% 1.00 $ 400.00 - $ - $ 60.00 0.5% 0.0%- 0.1% - 8 - 1.00 8 400.00 - 8 - Rote / Unit or Lump Sum $ - $ 60.00 0 - OtherExpensesTotal $ 460.00 0.5% $ - $ 460.00 $ TOTAL EXPENSES $ 1,841.15 2.2% I$ - $ 632.50 $ 1,208.65 Subcontractor Fee Total $ - 0.0% I$ - $ - $ - Project Phase Total $ 84,355.15 I $ 36,763.00 $ 29,419.50 $ 18,172.65 Note: Communication expense is not svblect to 15%adminienstive fee. TOTAL PROJECT SWCA Labor Total Expenses Total Subcontractors Total TotoI Project Tax To. Total Including Taxes Char es 82,514.00 1,841.15 84,355.15 84,355.15 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 44 of 395 Page 1 of 1 r MARANA AZ FINANCE TASK ORDER PROJECT NO.: AP031 PSA NO.: General Service Agreement PROJECT DESCRIPTION: Planning & Environmental Documentation REQUESTED BY: Greg Sendlak, Project Manager ARTICLE 1. BACKGROUND This Task Order is issued by the TOWN OF MARANA (the "Town") to DIBBLE ENGINEERING, INC. (the "Consultant") under and subject to the terms of the General Service Agreement, dated May 19, 2020 (the "Controlling GSA"). Terms used in this Task Order shall have the meanings set forth in the Controlling GSA. ARTICLE 2. SCOPE The Consultant will provide the following services, as detailed in Exhibit A attached to this Task Order and incorporated by reference here: Dibble's January 16, 2023 proposal and Dibble's September 12, 2022 proposal ARTICLE 3. SCHEDULE Upon the Towri s issuance of a Purchase Order, the Consultant shall complete the services described in Article 2 above, except as adjusted by one or more fully executed contract change orders or supplemental agreements. ARTICLE 4. PAYMENT 4.01. In consideration of the performance of the services described in this Task Order, the Town shall pay the Consultant a maximum, not -to -exceed fee of $220,669.20 which shall constitute full and complete payment for all services required and rendered as described in Article 2 above, except as adjusted by one or more fully executed contract change orders or supplemental agreements. TO As-N Dibble Eng AS Needed Engineer AP031 230331 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 1 of 37 Page 45 of 395 4.02. The Consultant shall submit monthly invoices and other documentation in compliance with Article 6 of the Controlling GSA. 4.03. The Town shall make payments to the Consultant in compliance with Article 6 of the Controlling GSA. ARTICLE 5. TERM 5.01 This Task Order shall be effective upon the Town's execution of this Task Order and shall continue in full force for a period of 244 calendar days unless terminated earlier in accordance with the Controlling PSA. 5.02 This Task Order shall serve as the Notice to Proceed to the Consultant effective April 3, 2023. IN WITNESS WHEREOF, the Parties have executed this Task Order as of the dates written hereinbelow. The "Town": THE TOWN OF MARANA, an Arizona municipal corporation The "Consultant": DIBBLE ENGINEERING, INC. an Arizona corporation Y nis Kalaitzidis an Tarr, P.E. Fi ance and Purchasing Director Vice President As "Town Representative" under the Controlling GSA LI 11 23 D. to TO As-N Dibble Eng AS Needed Engineer AP031 230331 04/03/2023 Date Page 2 of 37 Marana Town Council Regular Meeting Agenda Packet Page 46 of 395 November 19, 2024 TO As-N Dibble Eng AS Needed Engineer AP031 230331 Exhibit A Consultant's May 8, 2020 Proposal [Scope of Work and Consultant's Proposal Following] Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 3 of 37 Page 47 of 395 MARANA AZ Capital Improvement Program ft< No Exceptions Taken ❑ Accepted as Noted ❑ Revised and Resubmit Not Accepted Date: 3 /, 7 / a 3 SCOPE OF WORK New Air Traffic Control Tower Planning and Environmental Documentation Marana Regional Airport DIBBLE MARANA AZ PI.181_IC WORKS Dibble has been requested by the Town of Marana (Town) to prepare the necessary Planning and Environmental Documentation for a new Airport Traffic Control Tower (ATCT) at the Marana Regional Airport (Airport or AVQ) Marana, Arizona. The Airport was accepted into the FAA Federal Contract Tower (FCT) in 2019 with a Benefit/Cost Ratio of 3.41 according to the Safety Risk Management Document, New Airport Traffic Control Tower Siting Report (Siting Report) prepared by AJT Engineering, Inc. dated October 25, 2022. According to the Siting Report, the average daily operations count at AVQ is 247 based on 2020 data and includes 33% local GA, 34% itinerant GA, 22% military and 11% air taxi. Tenants include flight schools, maintenance, and avionics facilities. There are approximately 273 based aircraft including corporate jets, rotary wing, and single engine airplanes. There is an active skydiving company and military skydiving training throughout the year. Several large events draw many large corporate jets for several days. The 90,000 operations including 30,000 itinerant, diverse mix of traffic and events which justify the need for this airport to have controlled airspace. This Scope of Services includes the necessary planning and environmental documentation to fully evaluate applicable environmental impact categories and prepare an Environmental Assessment (EA) pursuant to the requirements of Section 102(2)(c) of the National Environmental Policy Act (NEPA) of 1969 (Public Law 91- 190, 42 United States Code 4321 et. seq.) as outlined in 40 Code of Federal Regulations (CFR) 1500-1508. The preparation of an Environmental Impact Statement (EIS), should it prove necessary, is not included in this Scope of Services. Since the Federal Aviation Administration (FAA), through its Phoenix Airports District Office (ADO), will serve as Lead Agency in the NEPA process for airport actions, the format and subject matter included within the EA will conform to the requirements and standards set forth by FAA. These are contained principally in FAA Order 1050.1F, Environmental Impacts: Policies and Procedures and Order 5050.48, National Environmental Policy Act (NEPA) Implementing Instructions for Airport Action. In addition, the U.S. Department of Transportation Marana Regional Airport Planning A Environmental Documentation Dibble Scope of Services February 2023 Page 1 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 48 of 395 (DOT) Interim Policy on Page Limits for NEPA Documents and Focused Analyses (2019) will be followed with regard to EA page limits. This Scope of Services assumes that one of the sites already considered in the approved Siting Report dated October 25, 2022, will be selected as the preferred site and that the Siting Report will provide the majority of the information necessary for incorporation into the EA, as appropriate. This Scope of Services has been divided into two schedules - Schedule A and Schedule B. Schedule A includes the necessary planning tasks associated with the documentation leading to a FAA Determination to Prepare an EA or EIS. Schedule B includes required tasks associated with the preparation of an EA. Schedule A - Planning Documentation for FAA Determination Al. General A1.1. Project Management and Administration: Dibble will provide project management and coordination of the planning team. This task also includes providing coordination between planning team members, the Town, Airport, FAA, and other interested stakeholders. Administration tasks such as internal project meetings, file coordination, and invoicing are also included as part of this task. A1.2. Project Meetings: This task includes both internal and external project team meetings throughout Schedule A timeline. Dibble will facilitate virtual calls every two weeks, or as needed, with the project team to address questions and measure progress. Dibble will facilitate monthly calls with the Town and the FAA to report progress and address questions and/or comments. All meetings will be virtual and are planned to be no longer than one hour. Dibble will maintain a general summary of topics discussed. A2. Section 163 Review A2.1. Section 163 Preparation and Submittal: This task will identify the FAA action and confirm FAA authority for the proposed study. Dibble will prepare and submit to the FM a formal Section 163 Determination request for the proposed study based on preliminary findings contained in the approved Siting Report, dated October 25, 2022. A3. Identification of Connected Federal Actions This task will identify any connected federal actions associated with the proposed study, especially those that may require other federal agency permits or approvals, including other FAA Tines -of -business. A3.1. Identify Connected Federal Actions: SWCA/Dibble will prepare a list of federal agency actions required for the proposed study to proceed. Additionally, a working list of past executed, presently planned, and future planned (five-year period) projects within the study area will be prepared and Marana Regional Airport Planning & Environmental Documentation Dibble Scope of Services February 2023 Page 2 Marana Town Council Regular Meeting Agenda Packet Page 49 of 395 November 19, 2024 referenced for dependence on the Proposed Action; this will later be used in the cumulative analysis during the preparation of the EA (or EIS). A4. Identification of Lead, Cooperating, and Participating Agencies A4.1. Preparation of Working List: SWCA/Dibble will prepare a working list of entities for agency scoping, including Indian tribes, and identify each agency's role in the proposed study. A5. Preparation of Preliminary Study Components This task includes the creation and documentation of several preliminary study components. These tasks will be completed concurrently and submitted together as one deliverable. A5.1. Purpose and Need Statement: Dibble will prepare a preliminary Purpose and Need Statement for the proposed study. The Statement will be provided to both the FAA and the Town, in addition to other agencies identified as a part of the study if applicable. A5.2. Project Description: Dibble will prepare a preliminary project description. Specific details related to the ultimate construction of the ATCT such as temporary use areas, airfield closures, staging areas, access roads, to name a few, will be included as a part of the description. A5.3. Alternatives Description: Dibble will summarize the alternatives as found in the approved Siting Report dated October 25, 2022. This includes a discussion on the altematives that were dismissed, those that were considered by the sponsor but rejected, and those that will be carried forward for this study's analysis. A5.4. Identification of Potentially Significant Environmental Issues: SWCA will lead this task which is comprised of two components. The environmental impact categories as found in FAA Order 1050.1F, Environmental Impacts: Policies and Procedures will be reviewed to identify 1) the categories that are not likely to have a significant impact on the proposed project, and 2) the categories that may have an impact on the proposed project and/or those that are viewed as the most important to the public and the sponsor for further investigation. A5.4.1. Screening of Environmental Resources Likely Impacted: For the environmental categories with the potential to be impacted, SWCA will conduct an initial screening, either through desktop reviews and/or field assessments, to prepare a list of data gaps (See SWCA SOW, A5.4.1). This task also includes commencing the Special Purpose Law review process, Section 106 consultation (if needed) with State or Tribal Historic Preservation Officers (and other consulting parties such as certified local governments and Indian tribes), and Section 7 consultation (if needed) with the U.S. Fish and Wildlife Service. Any other technical assessments should also be started during this task. A5.4.2. Preparation of Treatment Measures Working List: In addition to Task A5.4.1, SWCA will prepare a working list of treatment measures. The list should identify implementation, oversight, Marana Regional Airport Planning & Environmental Documentation Dibble Scope of Services February 2023 Page 3 Marana Town Council Regular Meeting Agenda Packet Page 50 of 395 November 19, 2024 and schedule of each measure, which treatment measures would avoid or minimize impacts and those that would mitigate impacts below a significance threshold. A6. Schedule Preparation This timeline is associated with Schedule A tasks only. A6.1. Prepare Schedule: Dibble will create a schedule with milestones and tasks assigned to each entity (Town, FAA, Dibble, agencies). The schedule will also identify any assumptions associated with each task and identify key completion points for consultations and technical assessments. A7. Preliminary Public Outreach Plan A7.1. Public Outreach Pre -planning: Dibble will begin the pre -planning for the public outreach component. Dibble will consult and coordinate with the Town to determine where key documents will be made available to the public and recommend the length of public comment periods. The outcome of this task will be carried for in future tasks related to the implementation of the public outreach program. A8. Summary of Planning Tasks A8.1. Dibble will prepare a draft Summary of Planning Tasks Report identified herein for review by the Town and FAA. Dibble will facilitate one virtual meeting to review comments and questions received. Dibble will incorporate comments and prepare a final Summary of Planning Tasks Report for use by the FAA in making the official determination. The estimated schedule of completion for the Consultant team to complete Schedule A tasks is two months excluding FAA review and outside agency consultation. An additional two - four months for outside agency consultation and review may be anticipated in the overall Schedule A timeframe. FAA Determination Based on the thoroughness and completeness of the planning and documentation tasks described in Schedule A, the FAA will make an official Determination to Prepare an EA (or EIS) for the proposed ATCT at AVQ. If the proposed project meets the inclusion criteria, the project and its associated milestones will be added into the Transportation Planning Dashboard. EA Determination: Subsequent to the FAA's determination, the Town will authorize Dibble to prepare an EA in accordance with Schedule B. EIS Determination: Subsequent to the FAA's determination, the Town will work with FAA directly and inform Dibble if additional services will be required. This scope of services does not include the preparation of an EIS. Marana Regional Airport Planning & Environmental Documentation Dibble Scope of Services February 2023 Page 4 Marana Town Council Regular Meeting Agenda Packet Page 51 of 395 November 19, 2024 Schedule B - Preparation of an Environmental Assessment B1. General B1.1 Project Management and Administration: Dibble will designate a Project Manager (PM) to act as the Town's representative for the EA. In conjunction with the Town, the PM will have the authority to transmit instructions, receive information, interpret, and define the Town's policies and decisions with respect to Dibble's services for the study/project. In addition, the PM shall manage contract/subcontract preparations, negotiations, and execution. Also, the PM shall manage all schedules and budgets, including invoicing and maintaining internal Dibble project controls related to staffing, schedules, and budgets. Lastly, Dibble shall implement a client communication process that involves ongoing email and phone calls during the duration of the EA. B1.2 Project Meetings: This task includes both internal and external project team meetings throughout Schedule B timeline. Dibble will facilitate virtual calls every two weeks with the project team to address questions and measure progress. Dibble will facilitate monthly calls with the Town and FAA to report progress and address questions or comments. All meetings will be virtual and are planned to be no longer than one hour. Dibble will maintain a general summary of topics discussed. B2. Preliminary Engineering Support (250/0 Design) and Construction Activity Estimates B2.1 Preliminary Engineering Design (25%): The Town will provide Dibble with the necessary preliminary engineering support for the project which will focus on identifying potential design challenges, addressing environmental concerns, and establishing/refining preliminary quantities related to the following project tasks: • Preliminary layout of the ATCT • Project limits of construction/disturbance • Borrow/stockpile areas, staging areas, and haul routes • Storm drain improvements • Vehicular access road and parking improvements • Utility improvements (all) • Preliminary construction schedule Note: Dibble will perform a cursory review of the preliminary engineering for completeness only. B2.2 Construction Activity Estimates: The Town will also provide Dibble with the necessary estimates of construction activity and duration. Note: Dibble will perform a cursory review of the construction activity estimates for completeness only. Marana Regional Airport Planning & Environmental Documentation Dibble Scope of Services February 2023 Page 5 Marana Town Council Regular Meeting Agenda Packet Page 52 of 395 November 19, 2024 B3. Study Components This task includes the components that will ultimately make up the Draft and Final EA for the ATCT at AVQ. These tasks will primarily be prepared by SWCA (see attached Scope of Work), with Dibble's oversight, coordination, and review. B3.1 Project Description (Chapter One): Chapter One of the EA will include the following introductory sections of the EA: an introduction to NEPA and the EA process; background information on the airport; the Purpose and Need Statement (Task A5.1), a description of the Proposed Action; requested federal actions; and the EA document organization. The Project Description will be based on the preliminary engineering completed in Task B2.1 and will include a discussion of construction activity and project ground disturbances, in particular as it relates to the foundation. Although the project (i.e., an ATCT) is likely to be one that would be under FAA jurisdiction for approval per Section 163 of the FAA Reauthorization Act of 2018, if the results of FAA's Section 163 determination indicate that portions of the project are not subject to FAA approval actions, then the project description will distinguish between those portions of the project that are part of the federal Proposed Action from those portions of the project that are not part of the federal Proposed Action for purposes of the analysis. B3.2 Alternatives (Chapter Two): Chapter Two of the EA will document the proposed ATCT's site selection process. It is assumed potential locations for the ATCT will have been vetted through the Siting Report. Using the Siting Report as a starting point for the analysis, the alternative sites will be compared against alternatives selection criteria to determine which sites are reasonable and feasible. All alternative sites meeting both the EA's reasonable and feasible criteria will be retained for further consideration in the analysis. As stated in FAA Order 5050.48, paragraph 706 (d)(7), an alternative can be eliminated from further consideration when the alternative has been judged "not reasonable." Whether a proposed alternative is reasonable depends, in large part, upon the extent to which it meets the purpose and need for the Proposed Action (FAA Order 1050.1F, paragraph 7-1.1[e]). FAA Orders 1050.1Fand 5050.4E also state that "an EA may limit the range of alternatives to the proposed action and no action when there are no unresolved conflicts concerning alternative uses of available resources (FAA Order 1050.1F, para. 6-2.1[d]; FAA Order 5050.413, para. 706[d][5]). 40 C.F.R. 1502.14(c) requires the evaluation of the No Action alternative regardless of whether it meets the stated purpose and need or is reasonable to implement." B3.3 Affected Environment (Chapter Three): Chapter Three will include an inventory of existing conditions as it relates to the environmental resource categories. Based on the potential ATCT locations considered in the Siting Report, the area of disturbance for the Proposed Action is assumed to be less than five acres and has been previously disturbed by prior airport operations. Based on Dibble's knowledge of the site, previous environmental studies completed at the airport Marana Regional Airport Planning & Environmental Documentation Dibble Scope of Services February 2023 Page 6 Marana Town Council Regular Meeting Agenda Packet Page 53 of 395 November 19, 2024 (for example, the environmental inventory and overview contained in the 2018 Airport Master Plan, and up-to-date internet research) each resource category contained in FAA Orders 1050.1F and 5050.4E will be evaluated in this chapter of the EA. Any information which is made available from resources agencies as part of the agency scoping process to help identify the presence of sensitive environmental resources in the vicinity of the Proposed Action will also be reviewed and incorporated as applicable. A detailed description of the affected environment will then be compiled to provide the baseline conditions for the environmental consequences' analysis. Exhibits will be provided, as needed, to visually present the information. The items listed below will be addressed in a level of detail commensurate with the importance of the resource, with less important information summarized, consolidated, or referenced, based on the Sponsor's knowledge of the project areas: • Air quality • Biological resources (based on existing field surveys and on-line databases) - Climate - Department of Transportation Act, Section 4(f) • Farmlands - Hazardous materials, solid waste, and pollution prevention - Historical, architectural, archaeological, and cultural resources - Land use - Natural resources and energy supply - Noise and compatible land use - Socioeconomics, environmental justice, and children's environmental health and safety risks - Visual effects (including light emissions) • Water resources Other planning documents pertinent to the affected area This task also includes developing an appropriate list of past, present, and future foreseeable projects within defined temporal and spatial study parameters for use in the cumulative analysis of incremental project effects completed. B3.4 Environmental Consequences and Mitigation, if Necessary (Chapter Four): The purpose of this task is to determine if significant impacts would result from the Proposed Action alternative, the No Action alternative, or any other development altematives appropriate for detailed analysis as determined during Task B3.2. The categories that are not likely to have a significant impact on the proposed project as identified in Task A5.4.1 will be summarized within for reference. Impact categories that may be affected by the Proposed Action, either directly or Marana Regional Airport Planning & Environmental Documentation Dibble Scope of Services February 2023 Page 7 Marana Town Council Regular Meeting Agenda Packet Page 54 of 395 November 19, 2024 indirectly (as defined by 40 CFR §1508 .8), are listed in Tasks B3.3. If it is determined that there are significant impacts in any given category, avoidance, minimization, or mitigation measures will be identified. The analysis will use quantitative measures whenever possible to describe impacts. If qualitative measures are used because quantitative measures are unavailable, the terms in the document will be defined and uses consistently (e.g., short-term is <6 months duration). Note: Chapters 3 and 4 may be combined per FM Order 1050.1F Paragraph 62.1e to ensure a more concise document. B4. Documentation This task includes the culmination of all previous tasks to produce a Draft and Final EA. It also includes a summary of the public notices and comments that will occur during this stage. SWCA will lead this task with Dibble oversight, coordination, and review. A Draft EA Is the product of several iterations based on consecutive Town and FAA reviews and comment. A Final EA also includes public and/or agency comment letters on the Draft EA and written responses to any comments received during the official comment period. B4.1 Preliminary Draft EA: A Preliminary Draft EA for the Proposed Action will be prepared in accordance with FAA Orders 5050.48 and 1050.1F. This task includes the preparation of other required EA sections besides Chapters One through Four as described previously in Tasks B3.1 through B3.4. The Preliminary Draft EA, which is designed for internal review only, will be provided first to the Airport Sponsor prior to submittal to the FAA ADO for review and comment. The Preliminary Draft EA will be prepared for intemal team review and provided electronically. Once the Airport Sponsor has provided their comments, an electronic submittal of the Preliminary Draft EA will be submitted to FAA via the Phoenix ADO's electronic submittal process. B4.2 Revised Preliminary Draft EA: Following review, comments made by the FAA as a result of Task B4.1 will be incorporated into the environmental document using track changes. Electronic copies of the chapters containing the revisions will then be forwarded first to the Airport Sponsor and then back to the FAA ADO for review and concurrence. The FAA ADO will then undertake any required FAA legal counsel, "lines of business," and/or regional review. B4.3 Draft EA: Revisions required by the FAA's legal counsel, "lines of business," and/or regional reviews will be incorporated into the environmental document and a final "screen check" version of the Draft EA will be submitted electronically to the FAA ADO for concurrence. Once FAA's authorization to print the Draft EA has been received, up to eight (8) printed copies and one (1) flash drive of the Draft EA in Adobe PDF format will be prepared. Marana Regional Airport Planning & Environmental Documentation Dibble Scope of Services February 2023 Page 8 Marana Town Council Regular Meeting Agenda Packet Page 55 of 395 November 19, 2024 Note: The Draft EA made available to the public must be Section 508 compliant. B4.4 Draft and Final EA Notices: Once the Draft EA is available for public and agency comment (Task B4.3), a Notice of Availability (NOA) will be prepared in accordance with the requirements of FAA Orders 1050.1F and 5050.48 and submitted to the Airport Sponsor for publishing in an area -wide or local newspaper of general circulation. The NOA will notify the public of the availability of the document and will allow for a public comment period (to be determined by the FAA). Additionally, letters will be sent to the various resource agencies consulted to allow them an opportunity to review and comment on the Draft EA, as applicable direct mailings or the sending of email blasts can also be used to notify the public of the availability of the Draft EA. Once the Final EA (and FAA decision document, for example, a Finding of No Significant Impact) is available, a Notice of Finding will be prepared and submitted to the Airport Sponsor for publishing in an area -wide or local newspaper of general circulation. This will conclude the Final EA process. Note: The Town will be responsible for placing press releases, newspaper notices, or public advertisements in appropriate newspapers, for posting notices on appropriate websites, and for any direct mailings or the sending of email blasts. B4.5 Response to Public Comments: Responses will be prepared to address all comments raised during the official comment period for the Draft EA. Responses will be submitted to the Town for internal review prior to inclusion into the Final EA. Revisions requested to the response to comments by the Town or FAA are included in this task. B4.6 Final EA: The Final EA for the Proposed Action will include an appendix containing an affidavit of publication of the Notice of Availability (Task B4.4). The Final EA document will also include copies of all comments received during the public comment period and responses to comments as outlined in Task B4.5, the signed FAA decision document, and a signed Final EA cover. Before printing the Final EA, the FAA ADO will be provided an electronic submittal of the "Pre - Final" EA in Adobe PDF format. After the incorporation of any requested changes, FAA will then complete its final review. Once approval to print the Final EA is received, eight (8) printed copies and two (2) flash drives of the Final EA will be prepared. FAA will be provided two (2) of the printed copies and one (1) flash drive; the Arizona Department of Transportation — Aeronautics Division can also be provided with an electronic copy for their files. Note: The Final EA made available to the public must be Section 508 compliant. Marana Regional Airport Planning & Environmental Documentation Dibble Scope of Services February 2023 Page 9 Marana Town Council Regular Meeting Agenda Packet Page 56 of 395 November 19, 2024 B5. Public Outreach (Optional — TBD by FAA) B5.1 Public Workshop/Hearing: If the FAA determines a public workshop/hearing is required, it is anticipated that one public information workshop will be held during the public review of the Draft EA and can be conducted using an "open house" format. The workshop will use informational display boards prepared by Dibble and SWCA will facilitate discussion with attendees. Members of the project team will attend the workshop to allow for one-on-one interaction with the public. Written comments received during the workshop will be summarized and included within a chapter or an appendix of the EA. Dibble will also provide and maintain sign -in sheets, comment forms, or other materials used during the workshop. Notification of the workshop will be accomplished using press releases, newspaper advertising, email blasts, and/or direct mailings (using a small fact sheet or postcard format) to adjacent landowners, interested citizens, neighborhood associations, and other groups in the area that may have an interest in the environmental documents. Dibble will provide draft copy for any of these methods of communication, as requested. NOTE: The Town will be responsible for placing press releases, newspaper notices, or public advertisements in appropriate newspapers, for posting notices on appropriate websites, and for any direct mailings or the sending of email blasts. B6. Preparation of the Administration Record B6.1 Preparation of Administrative Record: SWCA will prepare the required administrative Record for the EA. This task includes the following tasks for the preparation of an administrative record for the NEPA process: - An index listing all the documents, their name, format, type, and if they contain information exempt from Freedom of Information Act (FOIA) release (e.g., archaeological site locations) will be prepared for the Administrative Record. The index will be editable in case FAA needs to add items. - Documents that are incorporated by reference will be placed in the Administrative Record. - Documents the agency relied on in preparing the NPEA document that are not publicly available will be placed in the Administrative Record. (Propriety material may be excluded if it is clearly identified as such in the NEPA document.) • Scoping documents will be placed in the Administrative Record even if they pre -date the FAA involvement in the EA process. - The Administrative Record will be provided to the FAA electronically only. The work products that will be prepared at various stages throughout Schedule B are summarized in Table 3. The estimated schedule of completion for Schedule B tasks is four months excluding FAA review and approval. Marana Regional Airport Planning & Environmental Documentation Dibble Scope of Services February 2023 Page 10 Marana Town Council Regular Meeting Agenda Packet Page 57 of 395 November 19, 2024 T\FLl 3 S' r. r,li.oCal SCHEDULE B'v,Al. PRcut ILT DLLI✓I .t, KLL ` Dclive lblcs TOWN X FAA X ADO f Preliminary Draft EA Revised Preliminary Draft EA X X Draft EA X X Draft and Final EA Notices X X Response to Public Comments X X Final EA X X X Scope of Services Assumptions - The Town is actively progressing the necessary preliminary engineering (25%) and construction estimates for use by Dibble in the preparation of the Planning and Environmental Documentation. • No alternative ATCT sites besides those included in the siting study will be required to be carried forth into the detailed environmental analysis. - No operational noise modeling will be required for the completion of this EA. - The Town will be responsible for placing all NOAs in an appropriate newspaper, posting NOAs and public review documents on the Town or airport website, and placing hard copies of the Draft and Final EA in specified public viewing areas, such as public libraries. Attachments • SWCA Environmental Scope of Work (Schedule A & B) dated January 6, 2023 END OF SCOPE OF WORK Marana Regional Airport Planning & Environmental Documentation Dibble Scope of Services February 2023 Page 11 Marana Town Council Regular Meeting Agenda Packet Page 58 of 395 November 19, 2024 Firm: Dibble Planning and Environmental Services Project: Planning and Environmental Documentation Marana Regional Airport Date: 1/16/2023 DIBBLE Contract Number: Project Number: Task Number: Amendment Number: TBD FAA Number: TBD ADOTNumber: TBD Summary Dibble Subconsuttantsl A. Planning & Environmental Phase Services Fee Type 1 Dibble S68,184.00 Not to Exceed 2 Dibble (Direct Expenses) S143.75 Direct Cost 3 SWCA Environmental Consultants.. $135.233.26 Not to Exceed 4 Genesis Consulting Group _ $11,390.68 Not to Exceed 568,184 0D $143.75 Total $135,233.26 $11,390.68 Total Fee _ _ _ ___ » ...— ».»...._.— __ »... ..». $214 95L69 S68,327.75 S146,623.94 Marana Town Council Regular Meeting Agenda Packet Page 59 of 395 November 19, 2024 Firm: Dibble Planning and Environmental Services Project: Planning and Environmental Documentation Marana Regional Airport Date: 1/16/2023 Contract Project Task Amendment FAA ADOT Number: 0 Number: 0 Number: 0 Number: TBD Number: TBD Number: TBD DERIVATION OF FEE PROPOSAL SUMMARY Classification Total Billing Total Labor Hours Rates Costs 1 Principal Engineer 12 $245.00 $2,940.00 2 Senior Project Manager 157 $225.00 $35,325.00 3 Senior Planner 115 $215.00 $24,725.00 4 Planner 14 $170.00 $2,380.00 5 Project Engineer 10 $167.00 $1,670.00 6 Senior Technician 8 $143.00 $1,144.00 7 Admin Assistant 0 $85.00 $0.00 Totals: 316 $68,184.00 ALLOWANCE FOR DIRECT COSTS AND SUBCONSULTANTS Item Cost Type of Compensation 1 Direct Expenses $143.75 2 SWCA Environmental Consultants $135,233.26 3 Genesis Consulting Group $11,390.68 Direct Cost NTE NTE Sub -Total for Direct Costs $146,911.44 ,TOTAL FEE $215,095.44 Marana Town Council Regular Meeting Agenda Packet Page 60 of 395 November 19, 2024 o c o E E E E E E zoro zi E " a u E PLANNING AND ENVIRONMENTAL PHASE SERVICES - LABOR HOURS l TOTAL HOURS BYTASK 12 m u e 2 2 n 0 0 0 .. .. m 1 2 ni o n n 2 2 2 .. .. ry a 1 m n I I-i ozz f a� I • og.; x 11 l m • t0 i� v 5 � � ry ry ry O W N,1 a IN ry m m 2 ry ry N m 2 v n n n n n _¢ W 2 e e ry m..manry n ry .. n rvry ocoaoto eno.10P `' OD R O. Z W 6 I ry n .. •+ �+ ^� Sri SCHEDULE A TASKS 114. i General 1.1 Project Management & Administration 3 N 1 1 6, . P1erarstlon d Preliminary Nude temperer& .1 Penrose and Need Statement — Proles Den:Orlon — - Al I Alternatry tOe4on Kip A5,4 Identification of Potentially Significant Environmental Issues A.1 SmroMng of Environmental Resources Likely Impacted 45.42 Preparation of Treatment Measures Westin/ List Schedule Pr upon_- 461 Prepare Schedule — . . P1einke gPabk° Oadt Plan 7.1 Public Outreach Pre -Planning Sununu" atKooks Talb ABA_ Prepare Draft and Final Summary or Planning Tasks SCHEDULE B TASKS AL Komi 811 Project Management and Administration 8.1.2 P01M Meethp S2 'warren elglssonfrown as%autot1 421 Preliminary Engineering Design (25%) 822 Construction Activity Estimates 31 Study Comments 113.1 Puiact Deicipdon lOwtrta Onai 8 3 2 Alternatives (Chapter Two) 4.3.3 Affected Environment (Chapter Three) 434 Environmental Consequences and Mitigation, it Necessary(Otirst Four) M Dtemeatidon — --- -- - 44.1 Poliminary Drdtq e A c m i E g 2� 1 Y N W i^ '11 i i Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 61 of 395 Firm: Dibble Planning and Environmental Services Project. Planning and Environmental Documentation Marana Regional Airport Date: 1/16/2023 DIBBLE Contract Number: 0 Project Number: 0 Task Number: 0 Amendment Number: TBD FAA Number: TBD ADOT Number: TBD PLANNING AND ENVIRONMENTAL PHASE SERVICES DIRECT COSTS 1. PRINTING (Display Boards. Draft. & Final Resort) a. 0 2. Travel 24 Sheets @ $0.80 /sheet $0.00 STUDY PHASE TOTAL $0 a. 1 Trips 250 Miles (it $0.575 per mile $144 STUDY PHASE TOTAL $144 Marana Town Council Regular Meeting Agenda Packet Page 62 of 395 November 19, 2024 sloe SWCA ENVIRONMENTAL CONSULTANTS 2/36 Sound Science. Creative Solutions." January 6, 2023 343 Wei Fr ,,din Strno! Tucson, Arizona 85701 Tel 520.325.9194 Fax 520.325.2033 www.swca.com Charlie McDermott, Aviation Planning Manager Dibble 7878 North 16th Street, Suite 300 Phoenix, Arizona 85020-4669 Submitted via email: charlie.mcdermott@dibblecorp.com Re: Environmental Services for the Marana Regional Airport Air Traffic Control Tower Project in Marana, Pima County, Arizona Dear Charlie: SWCA Environmental Consultants (SWCA) appreciates the opportunity to provide you with our scope of work (SOW) for environmental services for the Marana Regional Airport Air Traffic Control Tower Project in Marana, Pima County, Arizona. Dibble has prepared a Master SOW that outlines its approach to National Environmental Policy Act (NEPA) analysis. This SWCA SOW relies on the information and assumptions in Dibble's Master SOW. It is intended to supplement Dibble's Master SOW and provide an additional level of detail and assumptions, as necessary, for tasks that will be managed by SWCA as a subconsultant to Dibble. Thank you for providing us with the opportunity to work with you. If the SOW are acceptable to you, please provide us with contractual arrangements. Please contact me at (520) 402-4127 if you have any questions regarding this proposal. Sincerely, Theresa Knoblock Tucson Senior Office Lead Marana Town Council Regular Meeting Agenda Packet Page 63 of 395 November 19, 2024 SWCA Environmental Services for the Marana Regional Airport Air Traffic Control Tower Project in Marana, Pima County, Arizona SCOPE OF WORK Dibble is working with the Town of Marana (Town) on the Marana Regional Airport (AVQ) Air Traffic Control Tower (ATCT) project in Pima County, Arizona. The Town requested that Dibble prepare a scope of work (SOW) and cost estimate to complete the necessary National Environmental Policy Act (NEPA) and associated resources analyses for the project to meet the requirements of the Federal Aviation Administration (FAA) regulations. Dibble requested that SWCA Environmental Consultants (SWCA) provide services as a subcontractor on the project. Dibble has prepared a Master SOW that outlines the Team's approach to NEPA analysis. This SWCA SOW relies on the information and assumptions provided in Dibble's Master SOW. It is intended to supplement Dibble's Master SOW and provide an additional level of detail and assumptions, as necessary, for tasks that will be managed by SWCA as a subconsultant to Dibble. Task numbers reference the Schedule A and B task numbers in Dibble's Master SOW provided to the Town. SCHEDULE A - PLANNING DOCUMENTATION FOR FAA DETERMINATION SWCA will provide assistance with the following Dibble Master SOW Schedule A subtasks: A3. Identification of Connected Federal Actions: SWCA will assist Dibble in preparing a list of federal agency actions required for the proposed study to proceed. A4. Identification of Lead, Cooperating, and Participating Agencies: SWCA will assist Dibble in preparing a working list of entities for agency scoping, including Indian tribes, and identify each agency's role in the proposed study. A5.4 Identification of Potentially Significant Environmental Issues SWCA will lead this task, which will identify 1) the categories that are not likely to have a significant impact on the proposed project, and 2) the categories that may have an impact on the proposed project and/or those that are viewed as the most important to the public and the sponsor (i.e., AVQ and the Town) for further investigation. This task includes the following subtasks: • A5.4.1 Screening of Environmental Resources Likely Impacted: For the environmental categories with the potential to be impacted, SWCA will conduct an initial screening, either through desktop reviews and/or field assessments, to prepare a list of data gaps. This task also includes assisting FAA with initiation of the Special Purpose Law review process, if needed. This includes Section 106 consultation with State or Tribal Historic Preservation Offices (SHPOslTHPOs) and other consulting parties such as certified local governments and Indian tribes, and Section 7 consultation with the U.S. Fish and Wildlife Service (USFWS). Any other technical assessments will also be started during this task. SWCA will assist the Bureau of Indian Affairs by preparing draft coordination letters and other materials to initiate these processes. Formal consultation with other state and federal agencies such as SHPO and USFWS is ultimately the responsibility of the FAA as the lead agency. • A5.4.2 Preparation of Treatment Measures Working List: SWCA will prepare a working list of treatment measures. The list will identify implementation, oversight, and schedule of each measure, which treatment measures will avoid or minimize impacts, and which treatment measures will mitigate impacts below a significance threshold. Page I 1 Marana Town Council Regular Meeting Agenda Packet Page 64 of 395 November 19, 2024 SWCA Environmental Services for the Marana Regional Airport Air Traffic Control Tower Project in Marana, Pima County, Arizona SCHEDULE B - PREPARATION OF AN ENVIRONMENTAL ASSESSMENT TASK B1.1. PROJECT MANGEMENT SWCA will provide appropriate direction and project management for the development of the environmental assessment (EA) and associated tasks, as each is undertaken and completed. Dibble will be solely responsible to the sponsor and will act as a liaison between the Airport Authority, tribal staff, interested parties, and FAA to ensure the project is completed in a quality and timely manner. This task provides time for SWCA staff to communicate with Dibble and the Town via telephone or email. In addition, this task provides time for SWCA staff to manage the project, e.g., scheduling, regulatory guidance, project administration, and overall project management. TASK B1.2. PROJECT MEETINGS This task includes both internal and external project team meetings throughout the Schedule B timeline. SWCA will attend Dibble -facilitated virtual calls every 2 weeks and will provide support at monthly meetings with the Town and FAA as requested. All meetings will be virtual and are planned to be no longer than 1 hour. SWCA's project manager (PM) will attend meetings. TASK B3. STUDY COMPONENTS SWCA will lead the preparation of the draft and final EA. SWCA will prepare these documents in accordance with Council on Environmental Quality and FAA guidelines. These guidelines require that the EA be prepared as outlined in the Dibble Master SOW (Tasks B3.1 through B3.4). This SOW assumes that the EA will need to address the Proposed Action alternative (i.e., the preferred site), the No Action alternative, and the other three alternate sites evaluated in the siting study in equal detail. SWCA will prepare a preliminary draft EA, a revised preliminary draft EA, a draft EA, and draft and final EA notices (draft notice of availability and draft finding of no significant impact). SWCA will also prepare a response to public comments as further detailed in Dibble Master SOW, Task B4. As noted in the Dibble Master SOW, the EA will address the following resources: • Air quality • Biological resources (based on existing field surveys and on-line databases) • Climate • Department of Transportation Act, Section 4(f) • Farmlands • Hazardous materials, solid waste, and pollution prevention • Historical, architectural, archaeological, and cultural resources • Land use • Natural resources and energy supply • Noise and compatible land use • Socioeconomics, environmental justice, and children's environmental health and safety risks • Visual effects (including light emissions) • Water resources Page 12 Marana Town Council Regular Meeting Agenda Packet Page 65 of 395 November 19, 2024 SWCA Environmental Services for the Marana Regional Airport Air Traffic Control Tower Project in Marana, Pima County, Arizona • Other planning documents pertinent to the affected area SWCA will prepare stand-alone reports to evaluate impacts to biological, cultural and visual resources. TASK B3.3.1. BIOLOGICAL RESOURCES This SWCA task will provide the information necessary to complete Dibble's Master SOW Tasks B3.3, Affected Environment (Chapter Three), and B3.4, Environmental Consequences and Mitigation, if Necessary (Chapter Four). The purpose of this task is to collect the biological resources information necessary to support the EA. Before conducting the site visit of the alternative project areas, an SWCA biologist will 1) review the USFWS species list for Pima County generated through the Information for Planning and Consultation system and 2) will review the online occurrence records for special -status species near the project area using the Arizona Game and Fish Department's Arizona Heritage Geographic Information System online environmental review tool. The SWCA biologist will then visit the project area to document the existing conditions and record any information related to the following regulations: Endangered Species Act, Migratory Bird Treaty Act, Arizona Department of Agriculture (ADA)— administered Arizona Native Plant Law, and ADA noxious weed regulations. In addition, Section 404 of the Clean Water Act will be addressed. Lastly, information on wildlife strikes from the FAA strike database will be included for the EA analysis. SWCA will then prepare a technical memorandum report to document findings and any recommendations regarding the results of the data review and the site visit for each alternative. In addition, the report will include recommendations for maintaining compliance with the regulations and contain information to support the EA document. This report will be delivered as an electronic (PDF) file. • No impacts to any Endangered Species Act —listed species will be identified; therefore, a formal biological evaluation report and subsequent Section 7 consultation will not be required for this project. • Access to the project area, if restricted, will be arranged by a client representative. • If for any reason SWCA staff are not able to survey the project area as a result of access restrictions, additional costs could be incurred beyond the amount proposed herein. TASK B3.3.2. CULTURAL RESOURCES This SWCA task will provide the necessary information related to Dibble's Master SOW Tasks B3.3, Affected Environment (Chapter Three), and B3.4, Environmental Consequences and Mitigation, if Necessary (Chapter Four). The purpose of this task is to collect the necessary cultural resources information to support the EA. This task is also intended to provide support for the Section 106 consultation process on behalf of the FAA, if needed. This task is divided into three subtasks—archaeological resources, architectural resources, and Section 106 support —all of which are detailed below. SUBTASK B3.3.2 A. ARCHAEOLOGICAL RESOURCES As part of the Section 106 process, the FAA must consider effects on historic properties, including archaeological sites that are eligible for the National Register of Historic Places (NRHP). The proposed ATCT location has been subject to an intensive Class III pedestrian survey, which was conducted in April 2022 for a proposed apron reconstruction. The results of this survey are summarized in Cultural Resources Survey for the Marana Regional Airport Hangar Apron Reconstruction Project, Pima County, Arizona prepared by SWCA's Tucson office. Because the Page 13 Marana Town Council Regular Meeting Agenda Packet Page 66 of 395 November 19, 2024 SWCA Environmental Services for the Marana Regional Airport Air Traffic Control Tower Project in Marana, Pima County, Arizona project area has been recently surveyed, SWCA anticipates that no additional fieldwork will be necessary relative to archaeological resources and that the prepared summary report will suffice for the cultural resources inventory. If requested, SWCA will prepare a letter report or technical memorandum outlining the extent of the previous survey and its results, which will support the FAA with its obligations under Section 106. The 2022 survey report is provided as an attachment to this document. SUBTASK B3.3.2 B. ARCHITECTURAL RESOURCES In addition to archaeological resources, the FAA must also consider the built environment and architectural resources that may qualify as historic properties (i.e., eligible for the NRHP). AVQ began as an auxiliary airfield, built to support training activities at the nearby Marana Army Airfield (today, Pinal Airpark) in the early 1940s during World War II. The initial airfield only included a series of intersecting runways, and no additional infrastructure was generally constructed at these touch-and-go airfields. Based on a preliminary review of aerial imagery and available airport records, there are three buildings at the airport today that are of historic age (i.e., at least 50 years old since first constructed), including two T-hangars and one larger hangar, all three of which were built between 1960 and 1972. SWCA will conduct a brief field visit to photograph these three hangars, note architectural details, and capture the setting of the project area. As requested by the FAA, fieldwork will also include representative photographs of the overall airport, including the runway system. After fieldwork, SWCA will prepare a report that will evaluate the three hangars for the NRHP and will consider the airport property as a whole to ascertain whether a historic district is present. Evaluation of significance and assessment of integrity for the individual hangars and the airport (as a potential district) will be in accordance with established guidance provided by the National Park Service (NPS) in its published National Register Bulletins. Additionally, SWCA will prepare an Arizona Historic Property Inventory Form (HPIF) for each of the three hangars as required by the Arizona SHPO. SWCA will submit the draft architectural report to Dibble for review and will incorporate any changes based on comments prior to submission to the FAA. If necessary, SWCA will revise the draft report to address any comments from the FAA as the federal lead agency. The FAA will be responsible for submitting the report to SHPO through its government -to -government consultation obligations. SWCA will address a third round of comments from the SHPO to finalize the report. SUBTASK B3.3.2 C. SEC i iuN 106 SUPPORT SWCA will also provide support to the FAA in the form of consultation letter review. SWCA will review 2-3 letters, with two rounds of edits each in support of the Section 106 process and to assist the FAA with its consultation efforts. The FAA will be responsible for the production and/or mailing (standard or electronically) the finalized Section 106 consultation letters to consulting parties. SUBTASK B3.3.2 ASSUMPTION. • The FM will consult with SHPO on the project area of potential effects (APE) in accordance with Section 106 guidance. Once established, SWCA will be provided with the project APE prior to beginning work under this task. • The project area has been sufficiently surveyed in its entirety for archaeological resources, and no additional fieldwork will be required for Subtask 6A. A letter report or technical memorandum may be prepared to summarize the adequacy of past investigations covering the project area, if needed. • Subtask 6A includes one round of revisions based on Dibble's comments and one round of revisions based on comments from the FAA. This subtask does not include costs for review by any other agency other than the FAA. Page I 4 Marana Town Council Regular Meeting Agenda Packet Page 67 of 395 November 19, 2024 SWCA Environmental Services for the Marana Regional Airport Air Traffic Control Tower Project in Marana, Pima County, Arizona • Because no archaeological survey will be required, Subtask 6A does not include any costs associated with project registration or curation of project records at the Arizona State Museum (ASM). If project changes occur that require Class III archaeological survey, a separate scope and cost estimate will need to be prepared to account for fieldwork, report preparation, and fees incurred to conduct survey under SWCA's Arizona Antiquities Act blanket permit (2023-50b1). • There are three hangars at the airport that are of historic age (i.e., at least 50 years old since the time of construction). Subtask 6B includes costs associated with field documentation and evaluation of up to three historic -era architectural resources. If more than three historic -era architectural resources are encountered at the airport, additional costs may be incurred due to documentation and reporting requirements. • Subtask 6B does not include preparation of any as -built plans, measured drawings, architectural descriptions, or other documentation associated with the Historic American Buildings Survey or Historic American Engineering Record programs administered by the NPS. • Subtask 6B includes three rounds of revisions based on Dibble, FAA, and SHPO comments. This Subtask does not include costs associated with review by any other agencies other than the FAA and SHPO. • Subtask 6C does not include costs associated with meeting attendance or other coordination that may occur as part of the Section 106 consultation. • Subtask 6C does not include preparation of a memorandum of agreement, memorandum of understanding, or any other documentation that may be required under the Section 106 process. TASK B3.3.3. VISUAL RESOURCES This SWCA task will provide the necessary information related to Dibble's Master SOW Tasks B3.3, Affected Environment (Chapter Three), and B3.4, Environmental Consequences and Mitigation, if necessary (Chapter Four). The visual resource analysis and subsequent technical report is designed to identify visually sensitive landscapes and to identify proposed project features or ongoing proposed project operations that have the potential to affect visually sensitive landscapes within the area. The goals of the visual resource analysis are to 1) identify locally, regionally, and/or nationally known locations where people commonly view and value the landscape, and 2) assess the change to the overall visual landscape and the effects on sensitive views from sensitive viewing locations. SUBTASK B3.3.3 A. VIEWSHED ANALYSIS Using GIS modeling technologies, SWCA will complete viewshed analysis from Site 5 to provide a general sense of the proposed project visibility within 5 miles of the project components (e.g., the ATCT). This analysis will be based on "bare earth" visibility, which reflects the worst -case scenario in determining visibility in this landscape using the best available GIS data, for example, digital elevation models, photogrammetry or LiDAR ground surface data. High - resolution and current satellite imagery may be obtained by SWCA data acquisition team. Viewshed analyses will model and illustrate areas in the landscape that would potentially have views of the proposed project components and may require further field study. SWCA will coordinate with Dibble and the Town to identify public -viewing platforms, also referred to as key observation points (KOPs) where the proposed project may be visible to the public. SUBTASK B3.3.3 B. KEY OBSERVATION POINTS AND BASELINE PHOTOGRAPHS Following completion of a viewshed analysis, SWCA will work with stakeholders and necessary parties (e.g., the Town and AVQ) to identify up to four KOPs for the proposed project. KOPs will be identified where the view of the project area will be most revealing or where there is high viewer sensitivity. SWCA's visual resource specialists will visit each KOP to take baseline photographs and document existing visual conditions. Page I 5 Marana Town Council Regular Meeting Agenda Packet Page 68 of 395 November 19, 2024 SWCA Environmental Services for the Marana Regional Airport Air Traffic Control Tower Project in Marana, Pima County, Arizona SUBTASK B3.3.3 C. IMPACT EVALUATION The analyses will be prepared by planning and environmental professionals with educational and career experience in the evaluation of visual impact. This will provide a systematic basis for evaluating impacts to visual resources. The methodology will be consistent with the policies, procedures, and guidelines in established visual impact assessment methodologies and includes but is not limited to the Bureau of Land Managements Visual Resource Management System, the NPS Visual Impact Assessment Evaluation Guide, and various state agency programs. Using the basic visual elements of form, line, color, and texture, the visual contrast analysis provides a qualitative assessment of anticipated contrast between the existing landscape character and the proposed activities and/or facilities. Factors influencing the assessment include distance of the proposed project elements from the KOP and the level of perceived contrast between the proposed project elements and the existing landscape. The existing landscape character and inherent visual quality will be described for the analysis area based on landform patterns and features, vegetation communities and pattems, built features, land use patterns, scarcity, and/or surface water resources. SUBTASK B3.3.3 D. VISUAL SIMULATIONS Based on preliminary desktop research, SWCA will develop representative photorealistic simulations from up to four identified KOPs. Below is an outline of the individual simulations that will be created from each KOP based on architectural and engineering drawings provided by the applicant in either AutoCAD, construction documents, or GIS- based software. • Preferred action — Daytime simulation from each KOP (4 simulations) — Nighttime simulation from one representative KOP (1 simulation) • Three alternative actions — Daytime simulation from each KOP for each altemative (12 simulations) — Nighttime simulation from one representative KOP (3 simulations) • Total number of simulations equals 20 For each simulation, the GPS location of the existing condition photo will be incorporated into AutoCAD/GIS for accuracy in relation to the proposed project. Digital elevation models and KOP locations will then be combined to create base imagery used in the simulation modeling process. Using 3Ds Max software, each KOP location will then be overlaid in the simulated 3D environment modeled after the existing topographic conditions, and relative to the ATCT design information which will be modeled in 3D based on plan and elevation information provided, then confirmed using reference information in AutoCAD. Within the simulated 3D environment, realistic materials and textures will be applied to the proposed project design data. The time of day and date will also be set within the environment, so the lighting and shadows cast on the models represent the same conditions within the site photos. Simulated cameras will then be set up in the 3D environment based on the GPS locations and the camera and lens settings used in the field. Snapshots are then taken from the virtual cameras and exported as rendered images for use in creating the finished simulations. The next step in the visual simulation process consists of merging the rendered images of the proposed project into the field photos using Adobe Photoshop software. These merged images will represent photo -realistic simulations of the ATCT as viewed from each selected KOP. SUBTASK B3.3.3 E. VISUAL RESOURCES TECHNICAL REPORT All data and information gathered in the above tasks (e.g., viewshed models, visual simulations, etc.) will be used for analysis purposes and included in the visual resources technical report. The report will outline the background for visual resources impact methodology, including explanation of significance criteria as defined by NEPA, FAA, and other regulatory or local visual guidance, as applicable; proposed project description; study area definition; local Page 16 Marana Town Council Regular Meeting Agenda Packet Page 69 of 395 November 19, 2024 SWCA Environmental Services for the Marana Regional Airport Air Traffic Control Tower Project in Marana, Pima County, Arizona baseline conditions; analysis of potential impacts; and any necessary mitigation measures to minimize impacts to aesthetics to support the EA. • SWCA will develop simulations from each selected KOP representing the existing condition and post - construction condition, for a total of (20) simulations. • All deliverables will be in electronic format and will consist of imagery that can be used for internal reviewing purposes. • SWCA will submit an administrative draft visual resources technical report as well as a final visual resources technical report. TASK B3.3.3 ASSUMPTIONS • Dibble will provide any available electronic design files and/or GIS shapefiles of the project design features, site layout, project limits, and other information as requested (ATCT construction details, sections, dimensions, CAD linework, etc.) to aid in the development of simulations. • SWCA will monitor and evaluate weather conditions leading up to the scheduled site visit. If weather or atmospheric conditions (e.g., rain, wildfire, smoke) will affect the opportunity for quality photographs to support the visual simulation development, SWCA will coordinate any project delays with Dibble and the Town. • Visual mitigation options will be determined by Dibble, who will provide information regarding materiality, etc. • Depending on completed research and outreach, additional KOPs may need to be added. • SWCA will provide Dibble and the Town with draft simulations for one 5-business-day review and comment period. • Any adjustments or revisions to the visual simulations after final submittal to Dibble and the Town, or special requests, may require modification to scope of services and estimated fee. TASK B5. PUBLIC OUTREACH As detailed in Dibble's Master SOW Task B5, SWCA will facilitate one public information workshop during the public review of the draft EA, likely held in an open house format. The SWCA PM and appropriate resource staff will manage the workshop and respond to public questions. SWCA also will provide a welcome table that includes staff to request sign -in, collect comments, and take meeting minutes. Please note that a court reporter will not be provided and is not required for EA public workshops. SWCA will prepare draft press releases, newspaper notices, or public advertisements for the Town's use. This SOW does not include hosting a website or drafting materials for a project website. TASK B6. PREPARATION OF THE ADMINISTRATIVE RECORD SWCA will maintain and prepare the required administrative record for the EA in coordination with the FAA and the Town. The administrative record will be provided to the FAA electronically only. As discussed in the Dibble Master SOW, the administrative record will include the following: • An index listing all documents, including name, format, type, and whether they contain information exempt from Freedom of Information Act release (e.g., archaeological site locations). The index will be editable to allow the FAA to add items. Page 17 Marana Town Council Regular Meeting Agenda Packet Page 70 of 395 November 19, 2024 SWCA Environmental Services for the Marana Regional Airport Air Traffic Control Tower Project in Marana, Pima County, Arizona • Documents incorporated by reference • Documents the FM relied on in preparing the NEPA document that are not publicly available (proprietary material may be excluded if it is dearly identified as such in the NEPA document) • Scoping documents, even if they pre -date FAA's involvement in the EA process. Page 18 Marana Town Council Regular Meeting Agenda Packet Page 71 of 395 November 19, 2024 Genesis Consulting Group, LLC SCOPE OF WORK New Air Traffic Control Tower Planning and Environmental Documentation Marana Regional Airport TASK B3.3.3. VISUAL RESOURCES This Genesis Consulting Group, LLC task, in coordination with Dibble/SWCA will provide the necessary location and photographic information related to Dibble's Master SOW Tasks B3.3, Affected Environment (Chapter Three), and B3.4, Environmental Consequences and Mitigation. The Visual Resource Analysis is designed to identify visually sensitive landscapes and to identify proposed project features or operations that have the potential to affect visually sensitive landscapes within the area. The goals of the visual resource analysis are to 1) identify locally, regionally, and/or nationally known locations where people commonly view and value the landscape, and 2) assess the change to the overall visual landscape and the effects on sensitive views from sensitive viewing locations. 'In support of the Visual Resource Analysis and related tasks, the Genesis Consulting Group, LLC will provide photographic equipment and services necessary to support a visual impact analysis that will be conducted for this EA. Utilizing DSLR, and UAS (Drone) mounted camera systems with high megapixel capabilities, Genesis will provide ground -based photography, and aerial photography as necessary to satisfy requirements. Deliverables will include all required photographs of each identified site, or Key Observation Points (KOP), and each will bear a GPS latitude/longitude location marking, elevation of photograph, compass direction, and other required site identifications. Deliverable photographs will be in JPEG, PING or similar format. SUBTASK B3.3.3 A. VIEWSHED ANALYSIS Using GIS modeling technologies, Dibble and SWCA will complete a viewshed analysis from Site 5 to provide a general sense of the proposed project visibility within 5 miles of the project components (e.g., the ATCT). Viewshed analyses will model and illustrate areas in the landscape that would potentially have views of the proposed project components and may require further field study. SWCA will coordinate with Dibble and the Town to identify public -viewing platforms, also referred to as key observation points (KOPs) where the proposed project may be visible to the public. SUBTASK B3.3.3 B. KEY OBSERVATION POINTS AND BASELINE PHOTOGRAPHS Following completion of a viewshed analysis, SWCA will work with stakeholders and necessary parties (e.g., the Town and AVQ) to identify up to four KOPs for the proposed project. KOPs will be identified where the view of the project area will be most revealing or where there is high viewer sensitivity. In the role of vision resource specialist, the Genesis Consulting Group, LLC will visit each KOP or required site, and initiate a series of daytime and nighttime photographs from each location. These photographs will be used in establishing the baseline visual condition and as a basis for determining impacts to the existing visual character of the area through the effects analysis. Photorealistic simulations showing the existing condition and proposed condition based on project design data will be provided to and developed by Dibble/SWCA to support the effects analysis. For each simulation, the GPS location of the existing condition photo will be incorporated into AutoCAD/GIS for accuracy in relation to the proposed project. Marana Town Council Regular Meeting Agenda Packet Page 72 of 395 November 19, 2024 e/b8 SWCA ENVIRONMENTAL CONSULTANTS 2/36 sound Science. Creative solutions.' January 13, 2023 343 West Franklin Skeet Tucson, Arizona 85701 Tel 520.325.9194 Fax 520.325.2033 www.swco.com Charlie McDermott, Aviation Planning Manager Dibble 7878 North 16th Street, Suite 300 Phoenix, Arizona 85020-4669 Submitted via email: charfie.mcdermott@dibblecorp.com Re: Environmental Services for the Marana Regional Airport Air Traffic Control Tower Project in Marana, Pima County, Arizona: Fee Proposal Dear Charlie: SWCA Environmental Consultants (SWCA) appreciates the opportunity to provide you with our Cost Estimate to provide environmental services for the Marana Regional Airport Air Traffic Control Tower Project in Marana, Pima County, Arizona. This cost estimate supports the SWCA portion of the Dibble January 2023 New Air Traffic Control Tower Planning and Environmental Documentation Scope of Work. SWCA will initiate our proposed scope of work based on the below time and materials not -to -exceed fee of $135,233.26 upon the appropriate notice to proceed. Thank you for providing us with the opportunity to work with you. Please contact me at (520) 402-4127 or theresa.knoblockAswca.com if you have any questions regarding this proposal. Sincerely, Theresa Knoblock Tucson Senior Office Lead Marana Town Council Regular Meeting Agenda Packet Page 73 of 395 November 19, 2024 SWCA Environmental Services for the Marana Regional Airport Air Traffic Control Tower Project in Marana, Pima County, Arizona: Fee Proposal COST ESTIMATE The total time and materials, not -to -exceed cost for the environmental services that we have proposed for the project in this scope of work are detailed below. Table 1. Cost Estimate. Task Labor Expenses Total Schedule A Planning Documentation for FAA Determination Task A3, A4, A5.4 SWCA Assistance on Schedule A tasks Schedule B Preparation of an Environmental Assessment Task 13.1.1. Project Management Task B.1.2. Project Meetings Task B.1.3. Study Components (EA) Task B.2.1 Biological Resources Task 8.2.2 Cultural Resources Task B.2.3 Visual Resources Task B5. Public Outreach Task B6. Administraive Record $ 13,41200 $ 13,412.00 $ 2,576.00 $ 2,576.00 $ 4,186.00 $ 4,186.00 $ 27,890.00 $ 27,893.00 $ 6,953.50 $ 58.94 $ 7,012.44 $ 17,608.25 $ 179.69 $ 17,787.94 $ 44,306.00 $ 247.25 $ 44,553.25 $ 11,99200 $ 2,515.63 $ 14,507.63 $ 3,308.00 $ 3,308.00 PROJECT TOTAL ASSUMPTIONS Schedule A $ 132,231.75 $ 3,001.51 $ 135,233.26 • Costs included to complete Schedule A tasks are based on the assumption that SWCA will be able to initiate background data collection that is part of Tasks B2.1, B2.3, and B2.3. If Schedule A is authorized separately from Schedule B, modification of this estimate would be required. Schedule B • This project is anticipated to occur over 12 months. • No impacts to any Endangered Species Act —listed species will be identified; therefore, a formal biological evaluation report and subsequent Section 7 consultation will not be needed or required for this project. • Access to the project area, if restricted, will be arranged by a client representative. • If for any reason SWCA staff are not able to survey the project area as a result of access restrictions, additional costs could be incurred beyond the amount proposed herein. • Up to two rounds of review and addressing edits are included in this proposal for all document submittals. • No impacts to any Endangered Species Act —listed species will be identified; therefore, a formal biological evaluation report and subsequent Section 7 consultation will not be required for this project. • Any task not expressly described herein is not included in the proposed cost. • Access to the project area, if restricted, will be arranged by a client representative. • If for any reason SWCA staff are not able to survey the project area as a result of access restrictions, additional costs could be incurred beyond the amount proposed herein. Page 11 Marana Town Council Regular Meeting Agenda Packet Page 74 of 395 November 19, 2024 SWCA Environmental Services for the Marana Regional Airport Air Traffic Control Tower Project in Marana, Pima County, Arizona: Fee Proposal • The FAA will consult with SHPO on the project area of potential effects (APE) in accordance with Section 106 guidance. Once established, SWCA will be provided with the project APE prior to beginning work under this task. • The project area has been sufficiently surveyed in its entirety for archaeological resources, and no additional fieldwork will be required for Subtask 6A. A letter report or technical memorandum may be prepared to summarize the adequacy of past investigations covering the project area, if needed. • Subtask 6A includes one round of revisions based on Dibble's comments and one round of revisions based on comments from the FM. This subtask does not include costs for review by any other agency other than the FAA. • Because no archaeological survey will be required, Subtask 6A does not include any costs associated with project registration or curation of project records at the Arizona State Museum (ASM). If project changes occur that require Class III archaeological survey, a separate scope and cost estimate will need to be prepared to account for fieldwork, report preparation, and fees incurred to conduct survey under SWCA's Arizona Antiquities Act blanket permit (2023-50b1). • There are three hangars at the airport that are of historic age (i.e., at least 50 years old since the time of construction). Subtask 6B includes costs associated with field documentation and evaluation of up to three historic -era architectural resources. If more than three historic -era architectural resources are encountered at the airport, additional costs may be incurred due to documentation and reporting requirements. • Subtask 6B does not include preparation of any as -built plans, measured drawings, architectural descriptions, or other documentation associated with the Historic American Buildings Survey or Historic American Engineering Record programs administered by the NPS. • Subtask 6B includes three rounds of revisions based on Dibble, FAA, and SHPO comments. This subtask does not include costs associated with review by any other agencies other than the FAA and SHPO. • Subtask 6C does not include costs associated with meeting attendance or other coordination that may occur as part of the Section 106 consultation. • Subtask 6C does not include preparation of a memorandum of agreement, memorandum of understanding, or any other documentation that may be required under the Section 106 process. • Dibble will provide any available electronic design files and/or GIS shapefiles of the project design features, site layout, project limits, and other information as requested (ATCT construction details, sections, dimensions, CAD linework, etc.) to aid in the development of simulations. • SWCA will monitor and evaluate weather conditions leading up to the scheduled site visit. If weather or atmospheric conditions (e.g., rain, wildfire, smoke) will affect the opportunity for quality photographs to support the visual simulation development, SWCA will coordinate any project delays with Dibble and the Town. • Visual mitigation options will be determined by Dibble, who will provide information regarding materiality, etc. • Depending on completed research and outreach, additional KOPs may need to be added. • SWCA will provide Dibble and the Town with draft simulations for one 5-business-day review and comment period. • Any adjustments or revisions to the visual simulations after final submittal to Dibble and the Town, or special requests, may require modification to scope of services and estimated fee. Page 12 Marana Town Council Regular Meeting Agenda Packet Page 75 of 395 November 19, 2024 888388 g8 x ::8 1 1 8' 8 8.8 S 8{ II k $ 8,3a...88,888888&; 1 I I'I 10 I I II — ' l , , , , , , . 8 $ 8 5 !,j,asRR& 8 . S 2' I si 8, l I 8 8 1 I:1 8 I •moo I ..n. 03'i66'II S CC 80L 3 E 88i88 E3 W 8888 ^:_ '88888 4 888!8;8 Rk -@'� 8. R a 88 RE .I1 8,81 i8;,&' oil., 2 IT8 ..�1 R' 88 , 8 8 a 8 Lii .888 888B1 ~ 88' S 8 w 8 8 . - EB.k~'888.8~1� 88~8' I J.i.• 8 8 8:88888 8A,488888 883383. a 1 W T I` 1IdIk.ii 1 u._ i 1 a _aaE ' �SL:.v VrY..7Et65Uti�i7 ..aczasc,, l 3u zF `2 6 1 Marana Town Council Regula Meeting Agenda Packet Page 76 of 395 November 19, 2024 Genesis Consulting Group, LLC Fee Sheet 01.16.2023 IC ,15 E § — a § VI� , ■ _` -] e! _. _� _ 1l VI§ 2 M _ - § IA. \ 2 §§ § _ T Senior Planner 202.69 § - ul § - rm ■ { §§§§ u _ Ea Project Principal 208.93 § - - - - $q §K Al in - e ■ efi Ai - - 1 ri— I | §§§§ 'Subtotal Hours and Fees § ■ § f . | aft. ¢ .2k-k I « ELEMENTS AND TASKS - DBE PROGRAM UPDATE Task 1.1 Project Management and Administration 1 TASK 83.33. VIS LL R SUBTASK 83.3.3 B. KEY OBSERVATION POINTS AND BASELINE PHOTOGRAPHS Daytime Photography Nlghtlme Photography t ■ 2 , iI k 1 12 .12 a] —, M. Ln'D r-_Cr.e= 2=__ a' g Q Q m a m m m Marana Town Council Regular Meeting Agenda Packet Page 77 of 395 November 19, 2024 p 602.957.1155 7878 North 16th Street, Suite 300 f 602.957.2838 Phoenix, AZ 85020 September 12, 2022 Galen Beem Airport Superintendent Marana Regional Airport 11700 W. Avra Valley Rd. Marana, AZ 85653 MARANA AZ By: PUBLIC WORK dibblecorp.com Capital Improvement Program No Exceptions Taken ❑ Accepted as Noted ❑ Revised and Resubmit ❑ ► • Accepted Date: 3 / / 7 / 623 RE: AIRPORT CONSULTING SERVICES PROPOSAL Task 6 for General Airport Engineering On -Call Services Marana Regional Airport Disadvantaged Business Enterprise (DBE) Reporting for Year 2023 Dear Galen: We appreciate the opportunity to provide airport consulting services to the Town of Marana for DBE participation reporting for federal fiscal year 2023 for Marana Regional Airport. Maintaining a current DBE Program is one provision of the FAA grant assurances for Airport Improvement Program (AIP)-funded projects. This project/scope of work includes helping the Town track and report DBE participation on federally funded environmental assessment for the proposed Air Traffic Control Tower (ATCT) between October 1, 2022 and September 30, 2023. Dibble will provide general project management, support, and coordination throughout the contract/task period. Genesis Consulting Group (Genesis), a subconsultant to Dibble under our Professional Services Contract 2018-148, will complete all necessary federal DBE reporting. The Dibble team will complete the services noted in the general Scope of Work above and Genesis' detailed Scope of Work (attached) for a lump sum fee of $5,573.76, which consists of a Dibble fee of $1,000.00 and a Genesis fee of $4,573.76. We are very much looking forward to continuing our partnership with the Town of Marana on this important project. If you need additional information or have questions, please do not hesitate to call. Sincerely, Carmen M. Rose, P.E Project Manager, Airport Development Practice Dibble Rn W. Toner, P.E. Vice President/Transportation Business Unit Leader Dibble DIBBLE Marana Town Council Regular Meeting Agenda Packet Page 78 of 395 November 19, 2024 MARANA AZ Marana Regional Airport (AVQ) Disadvantaged Business Enterprise Program (DBE) Federal Fiscal Year (FFY) 2023 Scope of Work Revised 8.11.2022 Dibble Engineers and Genesis Consulting Group, LLC (Consultant) have been requested by the Marana Regional Airport (Sponsor) to prepare a Year-2 Annual DBE Update for the recently completed Disadvantaged Business Enterprise (DBE) Program, Triennial DBE Goals Methodology Report - FFY 2022 — 2024. The primary tasks include: 1. Update the DBE Program, for FFY 2023, for annual/project level federally funded projects that exceed a cumulative value of $250,000/FFY. 2, Calculate annual/project level specific goals for the projects undertaken in the FFY. ELEMENT 1 PROJECT MANAGEMENT AND ADMINISTRATION Task 1.1 Project Management and Administration Dibble will provide and direct project management and coordination between team members, the Sponsor, and other interested stakeholders, as necessary. Administration shall include tasks such as file coordination and organization and on -going miscellaneous project communications throughout the course of the program update phase. Monthly invoicing shall be submitted to the Sponsor in a format acceptable to the Sponsor. ELEMENT 2 UPDATE DISADVANTAGED BUISNESS ENTERPRISE PROGRAM FOR ANNUAL UPDATES AND PROJECT SPECIFIC GOALS AND ANNUAL UPDATES Task 2.1 Develop Annual and Project Level Specific DBE Goals Update the DBE Program, for FFY 2023, for annual/project level federally funded projects that exceed a cumulative value of $250,000/FFY. • The two-step process will be conducted as prescribed by the regulations contained in 49 CFR Part 26, to determine base figures necessary to calculate annual/project level DBE goals. Methodology's chosen will be based on demonstrable evidence of market conditions and be designed to attain a goal that is rationally related to the relative availability of DBEs in the market area. DIBBLE anir GENE S I S Marana Town Council Regular Meeting Agenda Packet Page 79 of 395 November 19, 2024 • The goals will reflect the relative availability of ready, willing, and able DBE's. Research of these DBE's will be conducted as necessary to develop the DBE goals. • The Consultant will determine the reasonable local market area for ready and willing DBE's. Task 2.2 Deliverable - Draft Annual and Project Level DBE Goals Calculate project level DBE goals for projects undertaken in FFY 2023 and submit for review. One meeting will be held internally to review recommended goals for project level DBE participation Task 2.3 Deliverable — Final Annual and Project level DBE Goals for FFY2023 After concurrence with Sponsor, produce final project level DBE goals for projects undertaken in FFY 2023. ELEMENT 3 FAA REPORTING Task 3.1 Prepare/Update Historic Uniform Report of DBE Commitments/Award and Payments for FFY2023 Consultant will prepare and update historical Marana Regional Airport DBE participation data utilizing the FAA Civil Rights Connect Website, including Uniform Report of DBE Commitment and Award for Federal Fiscal Years 2022 and 2023 as required. 1)1 1 I\ 1 11 AI'1 1 v 1 \ 1 ) \il 1 I I\(I� DELIVERABLES • `.III 11\,,, Draft Annual and Project level DBE Goals for FFY 2023 2.2 1 Final Annual and Project level DBE Goals for FFY 2023 2.3 Prepare/Update Historic Uniform Report of DBE Commitments/Award and Payments for FFY 2023Project Kick-off Meeting 3.1 End of Scope of Services DIBBLE Marana Town Council Regular Meeting Agenda Packet Page 80 of 395 November 19, 2024 Revised 08.11.2022 g el S / 5 w o m a .al, `moo $ N H ao ffl ? r N V, ; IM 8 O 8888 so [V 88 c' N 8 N y! y O 4. b9 M fA aka U3 8 ci, ITotal Fees $ 4,573.76 Expenses Printing Total Program Year 2023 (Lump Sum) $ 4,573.76 8 O S 4 O cV O cV O aC o cv S N ELEMENTS AND TASKS - AVQ DBE PROGRAM UPDATE (Year 2) FFY 2023 7 t • 1 a Task 1.1 Project Management and Administration rb r i 1 V A 1 a. Task 2.1-Annual Goals and Methodology Reports FFY2023 Task2.2 - Draft Project/Annual Goals and Methodology Report Task 23 - Final Annual Goals and Methodology Report 1 Task 3.1 Prepare Program Uniform Report ofDBE Commitments/Awards and Payments 'Subtotal Hours and Fees N ni 't In to r` cc01 O N M ,- .— un %— 1-• .— 01 O N N CV N N CV N V1 N 10 N Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 81 of 395 46,:, MARANA AZ ESTABLISHED 1 9 7 7 Council -Regular Meeting C4 Meeting Date: 11/19/2024 To: Mayor and Council From: Debbie Thompson, Deputy Town Clerk Date: November 19, 2024 Subject: Approval of Study Session Summary Minutes of October 29, 2024, and approval of Regular Council Meeting Summary Minutes of November 6, 2024 (David L. Udall) Attachments Study Session Summary Minutes, 10-29-2024 Regular Council Meeting Summary Minutes, 11/06/2024 Marana Town Council Regular Meeting Agenda Packet Page 82 of 395 November 19, 2024 MARANA_ F STAR' ISH Ff) 1977 MARANA TOWN COUNCIL STUDY SESSION 11555 W. Civic Center Drive, Marana, Arizona 85653 Second Floor Conference Center, October 29, 2024, at or after 6:00 PM Ed Honea, Mayor Jon Post, Vice Mayor Patti Comerford, Council Member Jackie Craig, Council Member Herb Kai, Council Member John Officer, Council Member Roxanne Ziegler, Council Member SUMMARY MINUTES CALL TO ORDER AND ROLL CALL Mayor Honea called the meeting to order at 6:00 PM and directed the Deputy Town Clerk to call the roll. Council Member Craig was absent. Council Member Officer was absent for the Roll Call, Pledge, and Approval of Agenda but was present at 6:02 PM. All other Council Members were present, constituting a quorum. PLEDGE OF ALLEGIANCE/INVOCATION/MOMENT OF SILENCE: Led by Mayor Honea. APPROVAL OF AGENDA Council Member Ziegler moved to approve the agenda as presented. Council Member Kai seconded the motion. Motion passed, 5-0. DISCUSSION/DIRECTION/POSSIBLE ACTION D1 Relating to Tourism; presentation providing an update on the Town of Marana Tourism Master Plan; discussion and possible direction on current plan progress (Stefanie Boe) Council Study Session Meeting October 29, 2024 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 1 of 6 Page 83 of 395 [Council Member Officer was now present.] A copy of the presentation slides is on file with the Town Clerk's Office. Clarifying questions were asked and answered throughout the presentation. For more detailed information, including images and charts, please see the presentation slides. Town Manager Mr. Rozema, introduced Tourism & Marketing Manager Stefanie Boe, the Tourism Master Plan consultants, and the Tourism Master Plan. He explained that this presentation was meant to provide an update to the Council and provide an opportunity for the Tourism Committee to present its work thus far and to receive guidance and direction from the Council regarding the Plan. Ms. Boe provided an overview of the Tourism Master Plan. She highlighted the Town's tourism -related billboards on Interstate 10 and explained that they help people realize they are in Marana when they are traveling on the Interstate. She said the Town won the Office of Tourism Award for a partnership with Oro Valley for the Tucson Bicycle Classic. Ms. Boe introduced Mr. Matthew Landkamer and Ms. Stacy Humphrey from Whereabout Destination Strategies, the Town's consulting firm for the Tourism Master Plan. Council Member Ziegler asked where the billboards are located. Ms. Boe said that one is located right by Estes Elementary School and the other is not far from that location. She explained the billboards are facing traffic as people come into Tucson from Phoenix. Ms. Boe provided some history on the Tourism Master Plan. She said the official kick off was in February 2024. She said the Tourism Committee has been working to gather and bring information to the Council for input. One of the highlights of the planning sessions were trips taken to Gilbert and Queen Creek. Another part of the research involved having an in -market assessment that involved one of the consultants posing as a tourist or shopper at various locations in Marana. For a timeline of the efforts put forward so far on the Tourism Master Plan, please see the presentation slides. Mr. Landkamer and Ms. Humphrey then presented. They introduced themselves and their company and described their experience. They specialize in communities similar in size to Marana and focus on helping communities develop a robust and lasting visitor economy over time. Mr. Landkamer said that they drafted a Vision for the Town's Tourism Master Plan. Some of the themes and highlights to consider for the Plan were represented in the following words: trailblazing, welcoming, friendly, family, businesses, and festivals. For more detail, please see the presentation slides. The consultants also developed a Council Study Session Meeting October 29, 2024 Page 2 of 6 Marana Town Council Regular Meeting Agenda Packet Page 84 of 395 November 19, 2024 Competitive Position Statement designed to help the Town understand the current State of Marana and what tourism assets it currently has. During the presentation, the consultants explained the current state of tourism in Marana and outlined different phases of what tourism growth could look like in Marana. They outlined the Tourism Master Plan timeline and explained next steps. For more detail, please see the presentation slides. Mayor Honea commented that Marana was built on Cotton Farming and requested that cotton farming should be represented somewhere in the plan. Council Member Ziegler commented that the Town does not have a lot of restaurants in North Marana. Ms. Humphrey said that while there were not a lot of restaurants now, the Plan is designed for the future and part of the plan is to help grow the restaurant environment in the Town. Vice Mayor Post asked for clarification regarding the goals of the Tourism Master Plan. He said he was interested in the scope of the Plan. Mr. Landkamer explained that the Plan has several objectives designed to shape tourism in the Town for the next ten years. He explained that there will be measurable objectives to make sure the Town is moving in the right direction. Ms. Humphrey said the Tourism Master Plan helps the Town to have a steering wheel that will help the Town reach the vision it embraces. Please see the presentation slides for more detail. Vice Mayor Post asked if the Plan included ways of finding out who is coming to the Town now. He asked how in depth Plan will go. Ms. Boe reminded the Council that the Tourism Master Plan is a part of the Towri s Strategic Plan Five and said data was being obtained and evaluated regarding where people are coming from, how to attract more people to Marana, and how to get people to stay longer. She said the Tourism Master Plan is a very comprehensive plan that includes all aspects of tourism. She emphasized that the Plan will be data driven and very transparent. Vice Mayor Post thanked Ms. Boe for her explanation. Council Member Ziegler wanted to know if Town staff knew how much money tourism brings into the community. Economic Development Director Curt Woody stated that the Town of Marana brings in approximately $200 million a year in economic impact from tourism. He clarified that it was not money coming into the Town as an entity directly, but that it was the estimated economic impact within the Town limits. Council Member Ziegler asked to see data on the numbers. Mr. Woody said he would send her the information. Finance Director Yiannis Kalaitzidis said that during Fiscal Year 2024, the bed tax fund brought in $1,734,000.00. He said before that it was around $1.9 million per year. Council Study Session Meeting October 29, 2024 Page 3 of 6 Marana Town Council Regular Meeting Agenda Packet Page 85 of 395 November 19, 2024 Council Member Kai commented that the Tucson Rodeo brings in several million dollars a year and that the Town should be able to capture some of that. Council Member Ziegler agreed and mentioned other events in Tucson that bring money into Marana from hotel stays, restaurants, and shopping. Vice Mayor Post asked for a definition of tourism. Ms. Humphrey explained that tourism is any visitation from greater than 50 miles away. She explained that the current key drivers for tourism in the Town are people visiting friends and relatives that live in the Town, outdoor recreation, agri-western experiences, and day visitation for Town festivals. She said the Town is currently generating mostly one -day -visit tourism and isn't generating as much income from overnight stays. She explained that overnight stays significantly increase the economic impact of tourism. Vice Mayor Post asked if it would be considered tourism if someone came down from the Phoenix Metro area and used the Loop path in Marana/Pima County. Ms. Humphrey confirmed that that type of visit would be considered tourism. Vice Mayor Post commented that the Plari s goals were good and that they really fit what the Council wants. Mayor Honea commented that the Town needed to focus on hotel stays and dining and tap into tourism already brought to the Town by activities and events provided by the region. He also would like to focus on finding out what can be done to get people to spend money in Marana. Vice Mayor Post agreed and said that sometimes Marana piggybacks off of Tucson events because the Town lacks some of the things that promote tourism. Council Member Ziegler agreed and said that Marana has been living off of greater Tucson events and asked what the Town will do to become a destination. She said Marana needs to establish itself as a destination, and that we need more than just our current events. Mayor Honea pointed out that the Ritz Carlton is probably the closest thing the Town has to a destination. Council Member Officer suggested the Tortolita Mountains with a focus on bat and bird watching were possible reasons for people to visit and stay. Council Member Ziegler said the El Rio Preserve was a great amenity and said many of the Towri s residents do not know about it and that it could be improved and promoted for bird watchers. Mayor Honea agreed and added that the new Aquatic Center can become another destination. Council Member Kai suggested golf tournaments as another possible tourist draw. Council Study Session Meeting October 29, 2024 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 4 of 6 Page 86 of 395 Vice Mayor Post brought up the importance of advertising, and the importance of getting the word out about what there is to do in Marana. Ms. Boe said it was important to capitalize on things that Marana already has going on, including partnering with and supporting organizations that already exist in the town. She said she would like to start a grant fund to help non -profits grow and advertise what they have to offer. She pointed out that there are many untapped possibilities for tourism, including the Heritage Park where the Town has 160 acres of under-utilized land. She also discussed the importance of having a powerful SEO (search engine optimization) and explained how the Town has the most powerful SEO in the area and many of the Town's events are highlighted when a search is done. Discussion ensued between Council Members and Ms. Boe regarding possibilities to increase tourism in the Town, including visits to the Saguaro National Park, Ironwood Forest, the Town's signature events, and the Tortolita Mountains. Ms. Humphrey reiterated the importance of using data to track attendance at events. She also explained the importance of having a catchment area, where a tourist stays in one place and visits other places. Mayor Honea highlighted the importance of having people stay the night in Marana. Council Member Ziegler said the Town should find ways to support businesses like Lil Abner's. Ms. Boe and Town Attorney Jane Fairall reminded the Council that there are legal limits on how the Town can assist private businesses. Council Member Comerford thanked Ms. Boe and the consultants for seeking Council input regarding the Tourism Master Plan while it was in its early stages of development as opposed to presenting the Council with a finished product. Mr. Rozema summarized the Council's input thus far and highlighted the importance of the Town's work on developing Marana's downtown. He said the Tourism Master Plan is an important tool to help draw people to the Town of Marana. EXECUTIVE SESSIONS Pursuant to A.R.S. § 38-431.03, the Town Council may vote to go into executive session, which will not be open to the public, to discuss certain matters. El Executive Session pursuant to A.R.S. §38-431.03 (A), Council may ask for discussion or consideration, or consultation with designated Town representatives, or consultation for legal advice with the Town Attorney, concerning any matter listed on this agenda for any of the reasons listed in A.R.S. §38-431.03 (A). Council Study Session Meeting October 29, 2024 Page 5 of 6 Marana Town Council Regular Meeting Agenda Packet Page 87 of 395 November 19, 2024 FUTURE AGENDA ITEMS Notwithstanding the Mayor's discretion regarding the items to be placed on the agenda, if three or more Council members request that an item be placed on the agenda, it must be placed on the agenda for the second regular Town Council meeting after the date of the request, pursuant to Marana Town Code Section 2-4-2(B). Mayor Honea asked for future agenda items. There were no requests for future agenda items. ADJOURNMENT Mayor Honea asked for a motion to adjourn the meeting. Vice Mayor Post moved to adjourn the meeting. Council Member Kai seconded the motion. Motion passed, 6-0. Meeting adjourned at 7:10 PM. CERTIFICATION I hereby certify that the foregoing are the true and correct minutes of the Marana Town Council Study Session Meeting held on October 29, 2024. I further certify that a quorum was present. Debbie Thompson, Deputy Town Clerk Council Study Session Meeting October 29, 2024 Page 6 of 6 Marana Town Council Regular Meeting Agenda Packet Page 88 of 395 November 19, 2024 MARANA AZ ESTABLISHED 1 9 7 7 MARANA TOWN COUNCIL REGULAR COUNCIL MEETING 11555 W. Civic Center Drive, Marana, Arizona 85653 Council Chambers, November 6, 2024, at or after 6:00 PM Ed Honea, Mayor Jon Post, Vice Mayor Patti Comerford, Council Member Patrick Cavanaugh, Council Member Herb Kai, Council Member John Officer, Council Member Roxanne Ziegler, Council Member SUMMARY MINUTES CALL TO ORDER AND ROLL CALL Mayor Honea called the meeting to order at 6:01 PM and directed the Town Clerk to call the roll. Council Member Kai was absent. All other Council Members were present, constituting a quorum. PLEDGE OF ALLEGIANCE/INVOCATION/MOMENT OF SILENCE: Led by Mayor Honea. APPROVAL OF AGENDA Mayor Honea asked for a motion to approve the agenda. Council Member Ziegler moved to approve the agenda. Council Member Officer seconded the motion. Motion passed, 6-0. CALL TO THE PUBLIC PROCLAMATIONS Council Regular Meeting Summary Minutes November 6, 2024 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 1 of 6 Page 89 of 395 MAYOR AND COUNCIL REPORTS: SUMMARY OF CURRENT EVENTS Council Member Cavanaugh complemented the Loop extension recently completed in Marana along with all who participated to make it possible. He also complemented Parks and Recreation staff on their work at the El Rio Preserve. Vice Mayor Post welcomed Council Member Cavanaugh to his first meeting on the Town Council. He said he was excited to work with him and expected the Council would continue to do good things. Mayor Honea congratulated Council Member Ziegler and Council Member Cavanaugh on their recent election and welcomed Council Member Cavanaugh to the Town Council. He said he has worked with Council Member Cavanaugh and thinks he will do great on the Council. MANAGER'S REPORT: SUMMARY OF CURRENT EVENTS Town Manager Terry Rozema said there were 83 single-family residential permits issued for the month of October. He said 93 were issued last October. He said construction of phase one of the Saguaro Bloom park has begun and is going well and provided an update on the construction of the Marana Aquatics and Recreation Center (the MARC). He said the MARC still has an estimated completion date of May 2025. He said the Town's Christmas tree is currently being assembled in preparation for the Holiday Festival on December 7, 2024. He also reminded the Council that there were several upcoming RTA Next public outreach meetings. Council Member Ziegler asked about what is on the agenda for the RTA Next meetings. Mr. Rozema explained that RTA staff will present and provide the public the opportunity to ask questions and fill out a survey. He said the purpose of the meetings is to receive public feedback on the projects currently contemplated. Council Member Ziegler asked if the City of Tucson was going to their voters on this. Mr. Rozema explained that separate from the RTA initiative, the City was going to its voters with a half -cent sales tax ballot initiative for various quality of life issues. Mayor Honea highlighted that the purpose of the RTA next outreach meetings is to receive public input. PRESENTATIONS P1 Relating to Budget; presentation of first quarter results (July -September) for the Town's General Fund and other selected major funds for the 2024-2025 fiscal year (Yiannis Kalaitzidis) Council Regular Meeting Summary Minutes November 6, 2024 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 2 of 6 Page 90 of 395 Finance Director Yiannis Kalaitzidis presented on this item. A copy of the presentation slides is on file with the Town Clerk's Office. Mr. Kalaitzidis provided the Council with an overview of the Town's first quarter results for the Town's General Fund and other selected major funds for the 2024-2025 fiscal year. For detailed information, please see the presentation slides. CONSENT AGENDA The Consent Agenda contains items requiring action by the Council which are generally routine items not requiring Council discussion. A single motion and affirmative vote will approve all items on the Consent Agenda, including any resolutions or ordinances. Prior to a motion to approve the Consent Agenda, any Council member may remove any item from the Consent Agenda and that item will be discussed and voted upon separately. C1 Ordinance No. 2024.023: Relating to Business Regulations; revising Marana Town Code Title 9 (Business Regulations), Chapter 9-14 (Short -Term and Vacation Rentals), Section 9-14-9 (Compliance with laws; prohibited uses) to provide that accessory dwelling units may only be used for short-term rentals if and while the owner resides on the property that contains the accessory dwelling unit; and designating an effective date (Jane Fairall) C2 Resolution No. 2024-098: Relating to Budget; approving the addition of a new Capital Improvement Project known as the Network Redesign project in the fiscal year 2024-2025 budget (Ricardo Carlos) C3 Resolution No. 2024-099: Relating to Development; approving the final plat for Mandarina - Parcel 1, Lots 1-122 & Tracts A-M generally located north of Tangerine Road and east of Interstate 10 within a portion of Section 31, Township 11 South and Range 12 East (Scott Radden) C4 Resolution No. 2024-100: Relating to Development; approving the final plat for Mandarina- Parcel 2, Lots 123-182 & Tracts A-E generally located north of Tangerine Road and east of Interstate 10 within a portion of the east half of Section 36, Township 11 South, Range 11 East and a portion of the west half of Section 31, Township 11 South and Range 12 East (Scott Radden) C5 Approval of Regular Meeting Summary Minutes of October 15, 2024 (David L. Udall) Vice Mayor Post moved to approve the consent agenda. Council Member Officer seconded the motion. Motion passed, 6-0. Council Regular Meeting Summary Minutes November 6, 2024 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 3 of 6 Page 91 of 395 LIQUOR LICENSES BOARDS, COMMISSIONS AND COMMITTEES COUNCIL ACTION ITEMS FOR DISCUSSION/POSSIBLE ACTION D1 Relating to Development and Public Works; update, discussion, and possible direction regarding public and private projects and development applications on the Town's Marana Current and Proposed Projects internet site (Jason Angell) Development Services Director Jason Angell provided an update and answered questions related to public and private projects and development applications in the Town, as currently listed on the following website: https: / / maranaegov.com/ portal/ apps/ experiencebuilder/ experience/ ?draft=true&id =dae15ad306f b4a3f ba65ee3babc21 d54&page=Page&views=Water- Management %2Clnspections D2 Relating to Mayor and Council; selection of the Vice Mayor (David L. Udall) Mayor Honea moved to select Jon Post as Vice Mayor for the Town of Marana. Council Member Comerford seconded the motion. Motion Passed, 5-1, with Council Member Ziegler voting Nay. EXECUTIVE SESSIONS Mayor Honea asked for a motion to go into Executive Session on items E2, E3, and E4. Vice Mayor Post so moved. Motion passed, 6-0. [An Executive Session was held on Items E2 through E4, beginning at 6:26 PM and concluding at 7:22 PM.] Once back in open session, Mayor Honea asked for motions on Items E2, E3, and E4. The motions are reflected below. Pursuant to A.R.S. § 38-431.03, the Town Council may vote to go into executive session, which will not be open to the public, to discuss certain matters. Council Regular Meeting Summary Minutes November 6, 2024 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 4 of 6 Page 92 of 395 El Executive Session pursuant to A.R.S. §38-431.03 (A), Council may ask for discussion or consideration, or consultation with designated Town representatives, or consultation for legal advice with the Town Attorney, concerning any matter listed on this agenda for any of the reasons listed in A.R.S. §38-431.03 (A). E2 Executive Session pursuant to A.R.S. § 38-431.03(A)(7), discussion or consultation with the Town Manager, Finance Director, and Town Attorney in order to consider the Town's position and instruct its representatives regarding negotiations for the possible purchase of real property owned by Marana Health Center, Inc. located near the Marana Municipal Complex. Vice Mayor Post moved to direct Town staff to proceed as discussed in Executive Session. Council Member Officer seconded the motion. Motion passed, 6-0. E3 Executive Session pursuant to A.R.S. § 38-431.03(A)(7), discussion or consultation with the Town Manager, Finance Director, and Town Attorney in order to consider the Town's position and instruct its representatives regarding negotiations for the possible purchase of real property owned by Oracle Greenock, LLC located near Gladden Farms Community Park Vice Mayor Post moved to direct Town staff to proceed as discussed in Executive Session. Council Member Comerford seconded the motion. Motion passed, 6-0. E4 Executive session pursuant to A.R.S. §38-431.03 (A)(3) and (4) for discussion or consultation with the Town's attorneys and to instruct the Town's representatives concerning the litigation entitled Southern Arizona Home Builders Association v. Town of Marana, Pima County Superior Court Case No. C20184411. Council Member Cavanaugh moved to direct Town staff to proceed as discussed in Executive Session. Vice Mayor Post seconded the motion. Motion passed, 6-0. FUTURE AGENDA ITEMS Notwithstanding the Mayor's discretion regarding the items to be placed on the agenda, if three or more Council members request that an item be placed on the agenda, it must be placed on the agenda for the second regular Town Council meeting after the date of the request, pursuant to Marana Town Code Section 2-4-2(B). Mayor Honea asked for future agenda items. Council Member Ziegler requested a status update on the Airport's Master Development Lease negotiations. She said it has been a while and felt that Pima Aviation Council Regular Meeting Summary Minutes November 6, 2024 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 5 of 6 Page 93 of 395 has not communicated with the Town. Mr. Rozema said Town staff could provide an update during a Council meeting or during upcoming two -on -two meetings. Council Member Ziegler said the Town needed to complete the contract by the end of the calendar year. Mr. Rozema said the Council authorized a six-month extension of the Lease and Town Clerk / Assistant Town Attorney David Udall said the Lease, as extended, would expire in March 2025. Council Member Ziegler asked if the Town had heard from Pima Aviation. Mr. Udall said Town staff has heard a little bit from them, but not much. Council Member Ziegler said it was fine to receive an update in upcoming two -on -two meetings. ADJOURNMENT Mayor Honea asked for a motion to adjourn. Vice Mayor Post moved to adjourn the meeting. Motion passed, 6-0. The meeting was adjourned at 7:25 PM. CERTIFICATION I hereby certify that the foregoing are the true and correct minutes of the regular Town Council meeting held on November 6, 2024. I further certify that a quorum was present. David L. Udall, Town Clerk Council Regular Meeting Summary Minutes November 6, 2024 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 6 of 6 Page 94 of 395 46,, MARANA AZ ESTABLISHED 1 9 7 7 Council -Regular Meeting Al Meeting Date: 11/19/2024 To: Mayor and Council From: Austin Shreffler, Planner Date: November 19, 2024 Strategic Plan Focus Area: Not Applicable Subject: PUBLIC HEARING: Ordinance No. 2024.024: Relating to Development; approving a modification of a rezoning condition of Marana Ordinance No. 2021.016, which rezoned approximately 49 acres of land located approximately one -quarter mile south of Ina Road, west of Silverbell Road, to revise a provision of the ordinance that required all utilities outside of the Western Area Power Administration (WAPA) easement to be located underground (Austin J. Shreffler) Discussion: On August 17, 2021, the Mayor and Council adopted Ordinance No 2021.016, approving the rezoning of approximately 49 acres of land generally located approximately one -quarter mile south of Ina Road, west of Silverbell Road, from R-16 (Residential) to R-6 (Residential). The rezoning ordinance included a number of conditions, including condition #15 which requires all utilities to be underground, and all utility trenches to be revegetated with the exception of the overhead electric WAPA (Western Area Power Administration) easement. The applicant, Bud Cardinal, has requested that Ordinance No 2021.014, condition 15 be modified to exempt the existing overhead TEP electric line from undergrounding and to clarify that all new utilities servicing the rezoning area shall be underground. The applicant is requesting this modification based on recent TEP upgrades to the existing line due to summer moonsoon damage and conflicts with the Open Space Covenant. This condition modification is insubstantial enough to not require or benefit from Planning Commission consideration. Notice of this public hearing was published as required by law. Marana Town Council Regular Meeting Agenda Packet Page 95 of 395 November 19, 2024 Section 2, Condition #15 of Ordinance No. 2021.016 is proposed to be revised as follows, with deletions shown with strikeouts and additions shown underlined: All open space easements and wildlife corridors shall be left entirely undisturbed and in their natural desert state, except for necessary utility installations, which shall be revegetated. All such easements and corridors shall be dedicated to the appropriate entity, acceptable to the Town and at a time acceptable to the Town. All new utilities which will service the Rezoning Area shall be underground, and all utility trenches shall be revegetated to be identical with the surrounding desert_ with the exception of All existing the overhead electric lines within existing TEP andWAPA easements which shall be to WAPA and TEP specifications and are not required to be underground. Staff Recommendation: This is a discretionary item for the Council to consider. Staff has no objection to the requested rezoning condition modification. Suggested Motion: I move to adopt Ordinance No. 2024.024, approving a modification of a rezoning condition of Marana Ordinance No. 2021.016 which required the property owner to underground all utilities, including the existing overhead TEP electric line. Ordinance No. 2024.024 Applicant Request Location Map Application Ordinance 2021.16 Attachments Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 96 of 395 MARANA ORDINANCE NO. 2024.024 RELATING TO DEVELOPMENT; APPROVING A MODIFICATION OF A REZONING CONDITION OF MARANA ORDINANCE NO. 2021.016, WHICH REZONED APPROXIMATELY 49 ACRES OF LAND LOCATED APPROXIMATELY ONE- QUARTER MILE SOUTH OF INA ROAD, WEST OF SILVERBELL ROAD, TO REVISE A PROVISION OF THE ORDINANCE THAT REQUIRED ALL UTILITIES OUTSIDE OF THE WESTERN AREA POWER ADMINISTRATION (WAPA) EASEMENT TO BE LOCATED UNDERGOUND WHEREAS the Mayor and Council of the Town of Marana adopted Ordinance No. 2021.016 on August 17, 2021, approving a rezoning of approximately 49 acres of land located approximately one -quarter mile south of Ina Road, west of Silverbell Road; and WHEREAS approval of the rezoning was subject to a number of conditions, including condition 15 which requires, among other things, all utilities to be underground with the exception of the overhead electric Western Area Power Administration (WAPA) line; and WHEREAS the property owner has applied to the Town to modify condition 15 to permit existing Tucson Electric Power (TEP) lines to remain above ground; and WHEREAS the Mayor and Council find that modification of condition 15 as set forth in this ordinance is insubstantial enough not to require or benefit from Planning Commission consideration, and that this ordinance is in the best interests of the Town and its citizens. NOW, THEREFORE, BE IT ORDAINED by the Mayor and Council of the Town of Marana, Arizona, as follows: Section 1. Section 2, condition 15 of Marana Ordinance No. 2021.016 is hereby revised as follows, with deletions shown with strikeouts and additions shown with double - underlining: 15. All open space easements and wildlife corridors shall be left entirely undisturbed and in their natural desert state, except for necessary utility installations, which shall be revegetated. All such easements and corridors shall be dedicated to the appropriate entity, acceptable to the Town and at a time acceptable to the Town. All new utilities which will service the Rezoning Area shall be underground, and all utility trenches shall be revegetated to be identical with the surrounding desert_ with the exception of All existing the overhead electric lines within existing TEP and WAPA easements which shall be to WAPA and TEP specifications and are not required to be underground. Section 2. All ordinances or parts of ordinances in conflict with the provisions of this Ordinance No. 2024.024 -1- Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 97 of 395 ordinance are repealed as of the effective date of this ordinance. Section 3. If any section, subsection, sentence, clause, phrase or portion of this ordinance is for any reason held to be invalid or unconstitutional by the decision of any court of competent jurisdiction, the decision shall not affect the validity of the remaining portions of this ordinance. PASSED AND ADOPTED by the Mayor and Council of the Town of Marana, Arizona, this 19th day of November 2024. Mayor Ed Honea ATTEST: APPROVED AS TO FORM: David L. Udall, Town Clerk Jane Fairall, Town Attorney Ordinance No. 2024.024 - 2 - Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 98 of 395 Bud and Penny Cardinal Family LLLP c/o Bud Cardinal 7608 North La Cholla Boulevard Tucson, Arizona 85741 October 24, 2024 VIA EMAIL Town of Marana c/o Town of Marana Planning 11555 West Civic Center Drive Marana, Arizona 85653 maranaplanning@MARANAAZ.GOV Re: Silverbell Ridge Rezoning Condition #15 Modification Dear Town of Marana: This letter outlines a request for a modification (the "Rezoning Condition Modification") to Marana Ordinance No. 2021.016, Condition #15 ("Condition 15) for the Silverbell Ridge Single -Family Residential Subdivision in Marana, Arizona (the "Property"). The following is the current Condition 15: "All open space easements and wildlife corridors shall be left entirely undisturbed and in their natural desert state, except for necessary utility installations, which shall be revegetated. All such easements and corridors shall be dedicated to the appropriate entity, acceptable to the Town and at a time acceptable to the Town. All utilities shall be underground, and all utility trenches shall be revegetated to be identical with the surrounding desert with the exception of the overhead electric WAPA easement which shall be to WAPA specifications." A Property depiction has been included in Exhibit A which includes existing and proposed utilities. There are two Tucson Electric Power ("TEP") lines and one Western Area Power Administration ("WAPA") Line that are or will be located throughout the project: 1. The first is a new underground electric line to be constructed to service the subdivision and future homes which commences at the Southwest corner of Ina and Silverbell up to and throughout the subdivision. All of the newly constructed lines servicing the subdivision will be located underground within public rights -of -way. 2. The second is an existing TEP line (the "Existing Line"), which the utility provider has confirmed the line carries 46kV. 3. Lastly, a high -voltage (over 48kV) WAPA transmission line (the "WAPA Lines") is located adjacent to the TEP line, within a 100' right-of-way easement. Page 1 Marana Town Council Regular Meeting Agenda Packet Page 99 of 395 November 19, 2024 The intent throughout the original rezoning process, as noted in several of the other rezoning conditions, and as memorialized in the Open Space Covenant, was to keep these corridors in their current state and not further disturb the wildlife corridors. In addition, TEP has recently completed upgrades to the Existing Line which bifurcates the site. Both of these factors are further described below: • Tucson Electric Power Project: In response to summer monsoon damage, TEP recently completed an upgrade of the Existing Line from old wood structures to new, 65' steel poles. TEP's project concluded in September 2024 and if these lines were to be undergrounded, TEP's recent investment and efforts would be destroyed. Please also note that the Existing Line is not being connected to in order to service the Rezoning Area and future residences. • Open Space Covenant: During rezoning efforts in 2021, neighbors and local conservation groups required several items to be included within the rezoning conditions to ensure that planned natural open space ("NUOS") on the Property was maintained in perpetuity in order to protect the mapped wildlife corridors in the area. We dedicated the Town of Marana land depicted in Exhibit A after the zoning was approved to ensure these wildlife corridoes were protected. The onsite areas outside of the development envelope will be protected in perpetuity as NUOS and a pending covenant (the "NUOS Covenant") is to be recorded with the final plat, as attached in Exhibit B. The area in which the Existing Line traverses includes NUOS as articulated in the OS Covenant, and shall: o Be forever preserved as NUOS for the conservation of natural habitat for wildlife, the protection of rare and unique native plants and animals, and the scenic enjoyment of the Beneficiary and the public (Recital A in Exhibit B). By undergrounding the Existing Line, this causes further disturbance to the NUOS areas. o The OS Covenant allows for development of, or the granting of, access, rights - of -way or easements for new roads or new utilities, except as approved of by the Town of Marana and as expressly permitted by the Ordinance (Section 2.f) The Existing Line is not a new utility, it is an existing utility that shall remain in its current state to further comply with the OS Covenant. o The OS Covenant allows for repair, maintenance, and/or replacement of constructed drainage ways or channels, signage, fences, walls, or other improvements; provided, however, such incursions shall be temporary in nature (Section 2.m(iii)). Page 2 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 100 of 395 While undergrounding of the Existing Line would be considered replacement of a utility, it would not be temporary in nature, and thus, in conflict with the OS Covenant. With the above considerations, we request the following modifications to Condition 15: "All open space easements and wildlife corridors shall be left entirely undisturbed and in their natural desert state, except for necessary utility installations, which shall be revegetated. All such easements and corridors shall be dedicated to the appropriate entity, acceptable to the Town and at a time acceptable to the Town. All new utilities which will service the Rezoning Area shall be underground, and all utility trenches shall be revegetated to be identical with the surrounding desert. with the exception of All existing the overhead electric lines within existing TEP and WAPA easements which shall be to WAPA and TEP specifications and are not required to be underground." We appreciate your consideration of this request and look forward to hearing from you. Thank you, az,se Charles Bud Cardinal cc: Briana Rader, Mattamy Homes Austin Shreffler, Town of Marana Planning Matt Taylor, Town of Marana Planning Page 3 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 101 of 395 Exhibit A Property Depiction & Electric Utility Exhibit & Photo Not a part (Town of Marana Property) Natural Undisturbed Open Space SILVERBELL RIDGE - ELECTRIC UTILITY EXHIBIT LEGEND WAPA High -Voltage Lines (to remain overhead) TEP 46kV Lines (to remain overhead) Proposed Subdivision New Utilities (to be underground) •Town of Marana Land (Wildlife Corridor - not a part) Not a part (Town of Marana Property) Natural Undistur Page 4 Marana Town Council Regular Meeting Agenda Packet Page 102 of 395 November 19, 2024 Page 5 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 103 of 395 Exhibit B Open Space Covenant Page 6 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 104 of 395 When Recorded Return To: Attn: OPEN SPACE COVENANT FOR SILVERBELL RIDGE THIS OPEN SPACE COVENANT FOR SILVERBELL RIDGE (the "Covenant") is made on this day of , 202_ (the "Effective Date"), by Fidelity National Title Agency, Inc., an Arizona corporation, as Trustee under its Trust No. 60,204, and not otherwise, its heirs, successors, assigns, and grantees (collectively, "Owner") for the benefit of Wildlife Corridor Preservation Initiative, Inc., an Arizona non-profit corporation ("Beneficiary"). The Owner and the Beneficiary may be individually referred to as a "Party" or collectively, as the "Parties." RECITALS A. Owner is the owner of that certain real property, more particularly described on Exhibit "A" attached hereto and incorporated herein by this reference (the "Property"). B. As a condition to the establishment of appropriate zoning for the Property, the Town of Marana Council required that the portion of the Property more particularly described and depicted on Exhibit "B" (the "Restricted Area") be forever preserved as natural undisturbed open space ("NUOS") for the conservation of natural habitat for wildlife, the protection of rare and unique native plants and animals, and the scenic enjoyment of the Beneficiary and the public, all as set forth in that certain Marana Ordinance No. 2021.016, recorded August 20, 2021, in Sequence: 20212320150, Pima County Records (the "Ordinance"). Additionally, as more fully set forth below, certain portions of the Restricted Area may be utilized for infrastructure improvements as herein provided. C. In consideration of the foregoing, the promises, representations and warranties set forth in this Covenant, and good and other valuable consideration, the receipt and sufficiency of which are acknowledged, the Parties agree as follows: COVENANT 1. Recitals. The Recitals stated above are true and correct and constitute a part of this Covenant. 2. Restrictions. The Restricted Area will be forever preserved as NUOS, subject to the terms and conditions of this Covenant. This Covenant runs with the land and binds the Owner and its successors and assigns and may not be amended and removed without the written consent of the Beneficiary and the Town of Marana. The following is a nonexclusive list of prohibited activities in the Restricted Area: Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 105 of 395 a. Development, including rezoning, further subdividing or lot splitting; b. Construction or placement of new or additional buildings or structures (excluding utilities); c. Alteration of the ground surface or natural vegetation, except as may be needed for invasive species or vegetative disease removal and management and habitat restoration or enhancement; d. Impound, diversion, or alteration of any natural watercourse unless for watershed enhancements to improve species habitat or to maintain the Property's mitigation values; e. Alteration of any part of the Restricted Area (NUOS) unless for watershed enhancements to improve species habitat or to maintain the Property's mitigation values, such as Natural Infrastructure for Dryland Streams (NIDS), Dr. Laura Norman, USGS; f. Development of, or the granting of, access, rights -of -way or easements for new roads or new utilities, except as approved of by the Town of Marana and as expressly permitted by the Ordinance; g. Filling, excavation, dredging, mining, drilling, exploration, or extraction of minerals, hydrocarbons, soils, sand gravel, rock or other materials on or below the surface of the Restricted Area; h. Storage, accumulation, or disposal of hazardous materials, trash, garbage, solid waste or other unsightly material; i. Confinement of livestock; j. Residential use for mobile homes, treehouses, playhouses, travel trailers, tent trailers, self-propelled recreational vehicles, and similar structures or vehicles; k. Any modification of the topography through the placement of soil, dredging spoils, or other material, unless for watershed enhancement to improve species habitat or to maintain the Property's mitigation values, reduce soil erosion, or to protect public health, safety and welfare; 1. Off -road vehicular or pedestrian travel or access on the Restricted Area, except as otherwise specifically permitted in Section 2(m) below and for those activities that enhance wildlife connectivity and/or for Beneficiary to monitor and enforce restrictions; and m. Notwithstanding the foregoing or any provision herein to the contrary, the following are permitted incursions into the Restricted Area: (i) invasive species/vegetative disease management and monitoring, Beneficiary's monitoring, watershed enhancements to improve species habitat or to maintain the Property's mitigation values, reduce soil erosion, or to protect public health, safety and welfare; (ii) 2 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 106 of 395 construction and development of the residential subdivision, and maintenance of utility facilities and easements by utility providers; and (iii) the repair, maintenance, and/or replacement of constructed drainage ways or channels, signage, fences, walls, or other improvements by the Owner (or any homeowners' association formed for the community); provided, however, such incursions shall be temporary in nature and reasonably necessary to accomplish the foregoing purposes. Following any of the foregoing activities, the disturbed areas shall be revegetated substantially and materially similar to the surrounding desert. 3. Reserved Rights of Owner; Effect of Ordinance. Except for the specific restrictions provided in this Covenant, the Owner and its successors -in -interest and assigns reserve all rights in the Property including, without limitation, the right of exclusive use, possession and enjoyment of the Property, and the right to sell, transfer, lease, mortgage or otherwise encumber the Property. Nothing contained in this Covenant will be construed as a grant to the public or any other person or entity, of any right to enter upon any part of the Property, except the Beneficiary for the limited purpose set forth herein to enter the Restricted Area to confirm compliance with this Covenant at a minimum, quarterly. In addition, and notwithstanding any provision in this Covenant to the contrary, nothing herein shall otherwise prohibit or restrict any activities by Owner that are permitted under the Ordinance, nor shall this Covenant impose any additional obligations on the Owner (financial or otherwise) that are not specifically identified and required by the Ordinance. 4. Consideration. On or before thirty (30) days after the recordation of this Covenant, Beneficiary in consideration of Owner's execution and delivery of this Covenant, will pay Ten and No/100 Dollars ($10.00) to Owner. 5. Beneficiary's Right of Enforcement. If the Beneficiary reasonably determines that there is a breach of this Covenant, it may, but is not obligated to, enforce the terms of this Covenant, but only after following the procedures set forth in this Section 5. Prior to any enforcement action, Beneficiary must deliver written notice to Owner setting forth the alleged breach of the Covenant and the corrective action sufficient to cure the breach. The written notice must provide that Owner will have thirty (30) days from receipt of the notice to commence good faith efforts to cure the breach or to provide written notice of its disagreement with the allegations of such breach. If owner fails to contest such breach, commence curing the breach within such thirty (30) day period or fails to continue good faith efforts to cure such breach until fully cured, Beneficiary may bring an action for specific performance to enforce the terms of this Covenant. 6. Limitation on Enforcement. Owner will not be liable for any injury or change in the Restricted Area resulting from acts beyond Owner's control including unforeseeable acts of trespass, fire, flood, storm, drought, pests, natural disasters, wildlife, natural earth movement, vegetative disease, or resulting from any action taken by Owner under emergency conditions to prevent, abate or mitigate significant injury to the Restricted Area or adjoining property. The foregoing shall not abrogate the Owner's obligations to remove invasive non-native species from the Restricted Area as required by the Ordinance. 7. Entry by Beneficiary. Beneficiary shall defend, indemnify, protect and hold harmless Owner and its successors and assigns from and against any and all damages, costs losses, expenses, including reasonable attorneys' fees and litigation expenses, and liability, arising from or relating to Beneficiary's, its employees', agents', representatives', contractors', or any other person 3 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 107 of 395 affiliated with Beneficiary, entry upon the Restricted Area or Property or third party claims arising from any act or omission of Beneficiary or its agents, representatives, employees, or contractors upon the Restricted Area or Property. 8. Attorneys' Fees. In the event of any legal action or proceeding for the enforcement of any right or obligation herein contained, the prevailing party shall be entitled to recover from the unsuccessful party its costs and reasonably attorneys' fees incurred in the preparation and prosecution of such action or proceeding. 9. Governing Law and Jurisdiction. The laws of the State of Arizona shall govern the interpretation, validity, performance, and enforcement of this Covenant. The Parties hereto irrevocably consents to jurisdiction and venue in Pima County, Arizona and agrees not to attempt to remove or transfer any action properly commenced in Pima County, Arizona. 10. Severability. Any determination by any court of competent jurisdiction that any provision of this Covenant is invalid or unenforceable shall not affect the validity or enforceability of any of the other provisions hereof. 11. Assignment of Owner's Rights. Owner may assign its rights hereunder to a homeowner's association by an instrument expressly assigning such rights recorded in the Official Records of Pima County, Arizona without written consent of the Beneficiary. The homeowner's association may not terminate, rescind or revoke any rights, approvals or consents previously granted by Owner to Beneficiary, without the express written consent of Beneficiary. When Owner or its successor in interest has conveyed the Restricted Area to the homeowner's association, this Covenant, and all of Owner's rights and obligations hereunder, shall automatically be deemed to have been assigned to and assumed by the homeowner's association without the need for the execution or recording of any additional instrument. 12. No Agency. Nothing in this Covenant shall be deemed or construed by either party or by any third person to create the relationship of principal and agent or of limited or general partners or of joint venturers or of any other association between the Parties. 13. Covenants to Run with Land. It is intended that each of the easements, covenants, conditions, restrictions, rights and obligations set forth herein shall run with the land and create equitable servitudes in favor of the Beneficiary, shall bind every person having any fee, leasehold or other interest therein and shall inure to the benefit of the respective Parties and their successors, assigns, heirs, grantees, and personal representatives. 14. Integration Clause. This Covenant represents the entire agreement of Owner and Beneficiary with respect to this Covenant. 15. Notices. All notices, requests, demands and other communications required or permitted by this Covenant shall be delivered by personal delivery, or deposited with the United States Postal Service, return receipt requested, or delivered by a nationally recognized private courier service, with proper postage or other charges prepaid and properly addressed as follows: If to Beneficiary: Wildlife Corridor Preservation Initiative, Inc. 6363 N. Swan Rd. Ste. 151 4 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 108 of 395 If to Owner: Tucson, Arizona 85718 To the Owner of the Restricted Area named and at the address provided in the Pima County, Arizona property tax records. [Remainder of Page Left Intentionally Blank] [Signature Page Follows] 5 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 109 of 395 IN WITNESS WHEREOF, Owner and Beneficiary have executed this Covenant as of the Effective Date. OWNER: Fidelity National Title Agency, Inc., an Arizona corporation, as Trustee under its Trust No. 60,204, and not otherwise By: Name: Title: STATE OF ARIZONA County of Pima The foregoing instrument was acknowledged before me this day of , 202_, by , the of Fidelity National Title Agency, Inc., an Arizona corporation, as Trustee under its Trust No. 60,204, and not otherwise, for and on behalf thereof. Notary Public My Seal and Commission Expiration Date: Beneficiary Disclosure — Arizona Revised Statutes Section 33-404: The sole beneficiary of Trust No. 60,204 is Bud & Penny Cardinal Family LLLP, an Arizona limited liability limited partnership, whose address is 7608 North La Cholla Blvd., Tucson, Arizona 85741-4201. 6 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 110 of 395 BENEFICIARY: WILDLIFE CORRIDOR PRESERVATION INITIATIVE, INC., an Arizona non-profit corporation By: Name: Title: STATE OF ARIZONA County of Pima This instrument was acknowledged before me on , 202_ by Carolyn Campbell, the Director of Wildlife Corridor Preservation Initiative, Inc., an Arizona non-profit corporation, on behalf of said corporation. My Commission Expires: Notary Public 7 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 111 of 395 EXHIBIT A Legal Description of Property Lots 1-55 and Common Areas "A-1" through "A-4" ("Natural Open Space"), Common Areas "B- 1" through "B-5" (Landscape/Grading/Drainage) and Common Area "C" (Recreation), according to the Final Plat of Silverbell Ridge, recorded on , 202_, at Sequence Number in the Official Records of Pima County, Arizona, being a re -subdivision of Silverbell Ridge Estates Subdivision, Blocks 1-3, according to the plat recorded in recording No. 20182500098, Records of Pima County, Arizona. Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 112 of 395 EXHIBIT B Legal Description of Restricted Area Common Areas "A-1" through "A-4" ("Natural Open Space"), according to the Final Plat of Silverbell Ridge, recorded on , 202_, at Sequence Number in the Official Records of Pima County, Arizona, being a re -subdivision of Silverbell Ridge Estates Subdivision, Blocks 1-3, according to the plat recorded in recording No. 20182500098, Records of Pima County, Arizona. r • � I I� 4 40 COMMON AREA 'A-3' I Depiction of Restricted Area Lao AIA I COMMON AREA 'A-1' / / Lo P Ara LW4VII 41 WI1 Property Restricted Area ►N Fti '2 Ia.�lerAir,101, i� O COMMON AREA 'A-4' Ardr / Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 113 of 395 MARANA A Z Development Services / maranaAZ.gov 11555 West Civic Center Drive / Marana, AZ 85653 Ph (520) 382-2600 / Fax (520) 382-2641 PROJECT APPLICATION Instructions Information about project submittal requirements can be found online by reviewing the submittal checklist for the proposed scope of work at https://www.maranaaz.qov/developmentservicesforms. o Applicants can submit electrically by email. Please follow the information resource on "How to Submit Electronically." o Submit the completed application along with all forms and attachments electronically by email to maranaplanning@maranaAZ.gov for planning related applications or deveng@maranaAZ.gov for engineering related applications. If means to submit electronically are unavailable, applicants can submit in person using a print copy to: Development Services Marana Municipal Complex, Second Floor 11555 W Civic Center Dr. Building A2 Marana, AZ 85653 o The application and review status can be viewed through Permit Tracker, our On-line Application & Information System, utilizing the project search menu. o Notice of correction or approval will be communicated via email to the applicant listed on the application. Payment Fee information can be found on the online at maranaAZ.qov/finance. An invoice will be provided by email to the applicant for payment. Payment can be made in the form of credit card, cash or check payable to the Town of Marana. o Credit card over the phone, please call (520) 382-2600 o In person or by mail, please send checks to: Town of Marana, Cashiering 11555 W Civic Center Dr. Building A2 Marana, AZ 85653 Licensing Time Frame Pursuant to and subject to A.R.S. § 9-836 (2019), the Town of Marana hereby establishes its licensing time frames, available here. Contact Information For planning related questions about this form, please contact Marci Johns by email at maranaplannina @maranaAZ.gov or call (520) 382-2600. For development engineering questions about this form, please contact Charity Teresi by email at devengmaranaAZ.gov or call (520) 382-2600. Revision Date 05/16/2023 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 115 of 395 MARANA Development Services / maranaAZ.gov 11555 West Civic Center Drive / Marana, AZ 85653 Ph (520) 382-2600 / Fax (520) 382-2641 PROJECT APPLICATION APPLICATION TYPE ❑ Annexation ❑ Development Plan ❑ Development ❑ Rezone ❑ Minor Land Division ❑ Translational ❑ Specific Plan ❑ Landscape Plan ❑ Native ❑ Variance ❑ Hydraulic Model ❑ Sewer ❑ Plat ❑ Improvement Plan ❑ Report PROJECT INFORMATION Plan Package U General Plan Amendment Rezone ❑ Conditional Use Permit Plant Plan/Exception ❑ SWPP Capacity Assurance ❑ Sign Program (Type): El Other: Zoning Modificatio Project Name: Silverbell Ridge Description of Project: Single -Family Residential Subdivision Number of Lots: 55 Parcel No.(s): 214-041-170, -180, -190 Gross Area (Acres): 49 Project Address: 6975 N. Silverbell Road, Marana, AZ 85743 Ref. Project No.: PRV2309-002 CONTACT INFORMATION Owner: Bud & Penny Cardinal Family LLLP Contact Name: Bud Cardinal Address: 7608 N. La Cholla Blvd. City: Tucson State: AZ I Zip: 85741 Email: budc@theriver.com Phone No.: (520) 906-2868 Applicant: Bud Cardinal Contact Name: Bud Cardinal Address: 7608 N. La Cholla Blvd. City: Tucson State: AZ Zip: 85741 Email: budc@theriver.com Phone No.: (520) 906-2868 Consultant/Engineer: Mattamy Homes Contact Name: Briana Rader Address: 3561 E. Sunrise Dr., Suite 247 City: Tucson I State: AZ I Zip: 85718 Email: briana.rader@mattamycorp.com Phone No.: (520) 444-9364 APPLICANT AUTHORIZATION By signing below, I hereby acknowledge maranaaz.gov/arsnotice and certify that that the information owner o,f the iS r /the ✓ I have read the information provided online at set forth in this application are true and correct to property or I have been authorized In writing by the ow er, 'acl°rjivritten au orization from the owner) the best of my knowledge. I am either the owner to file this application. (If the applicant Bud Cardinal .."6- ).-l2,4/2,z,2_z}- Applicant Name (PRINT) Signature Date FOR OFFICIAL USE ONLY Date Received Revision Date 05/I6/2023 Project No. Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 116 of 395 GABRIELLA CAZARES-KELLY, RECORDER Recorded By: LW DEPUTY RECORDER 41 SMARA TOWN OF MARANA PICKUP I q ������ Hill ����� ����� Hi i Hill HHI Hill IIIII 411 Iiill III IIII it �C SEQUENCE: 20212320150 ¢:. x NO. PAGES: 22 08/20/2021 10:05:50 MARANA ORDINANCE NO. 2021.016 RELATING TO DEVELOPMENT; APPROVING A REZONING OF APPROXIMATELY 49 ACRES OF LAND LOCATED APPROXIMATELY ONE -QUARTER MILE SOUTH OF INA ROAD, WEST OF SILVERBELL ROAD, FROM R-16 (RESIDENTIAL) TO R-6 (RESIDENTIAL) WHEREAS C & C Construction Co., Inc., (the "Property Owner") owns 49 acres of land located approximately one -quarter mile south of Ina Road, west of Silverbell Road within Section 2, Township 13 South, and Range 12 East, described on Exhibit "E" attached to and incorporated in this ordinance by this reference (the "Rezoning Area"); and WHEREAS the Property Owner has authorized The Planning Center to submit an application to rezone the Rezoning Area from R-16 (Residential) to R-6 (Residential); and WHEREAS the Marana Planning Commission held a public hearing on this Rezoning on July 28, 2021, and voted five to zero (with two Commissioners absent) to recommend that the Town Council approve this Rezoning, subject to the recommended conditions; and WHEREAS the Marana Mayor and Town Council held a public hearing on August 17, 2021 and determined that the application for rezoning should be approved; and NOW, THEREFORE, BE IT ORDAINED by the Mayor and Council of the Town of Marana, Arizona, as follows: Section 1. The zoning of the Rezoning Area is hereby changed from R-16 (Residential) to R-6 (Residential). Section 2. This Rezoning is subject to the following conditions, the violation of which shall be treated in the same manner as a violation of the Town of Marana Land Development Code (but which shall not cause a reversion of this Rezoning), and which shall be binding on the Property Owner and their successors in interest (all of whom are collectively included in the term "Property Owners" in the following conditions): 1. Compliance with all applicable provisions of the Towri s Codes and Ordinances current at the time of any subsequent development including, but not limited to, requirements for public improvements and payment of application fees and applicable development impact fees. 2. Any preliminary plat or development plan for any portion of the Rezoning Area shall be in substantial conformance with the tentative development plan (shown Ordinance No. 2021.016 -1- 8/16/2021 2:33 PM [CLR] Marana Town Council Regular Meeting Agenda Packet Page 117 of 395 4,p, November 19, 2024 as "Exhibit A" attached to and incorporated by this reference in this ordinance) presented to and approved by the Town Council as part of this Rezoning. 3. A master drainage study must be submitted by the Property Owners and accepted by the Town Engineer prior to Town approval of a preliminary plat or development plan for any portion of the Rezoning Area. 4. The Property Owners shall design and construct a continuous left -turn lane along the entire frontage of the Rezoning Area. The design shall be subject to approval by the Town Engineer. 5. A water infrastructure and phasing plan (WIP) must be submitted by the Property Owners and accepted by the water provider prior to approval of a preliminary plat for any portion of the Rezoning Area. The WIP shall identify all on -site and off -site water facilities needed to serve the proposed development. The WIP shall include all information required by the water provider, such as (but not limited to) analysis of water use and fire flow requirements, and well source, reservoir, and booster station infrastructure needed to serve the proposed development. If the water provider requires a water service agreement as a condition of service to the proposed development, the Property Owners must enter into a water service agreement with the water provider consistent with the accepted WIP. 6. A master sewer plan must be submitted by the Property Owners and accepted by Pima County Regional Wastewater Reclamation Department (the "wastewater utility") prior to the approval of any final plat or development plan for the Rezoning Area. The master sewer plan shall identify all on -site and off -site wastewater facilities needed to serve the proposed development, and shall include all information required by the wastewater utility. If the wastewater utility requires a sewer service agreement as a condition of service to the proposed development, the Property Owners must enter into a sewer service agreement with the wastewater utility consistent with the accepted master sewer plan. 7. The Property Owners must design and construct any roadway, drainage, water, and wastewater improvements, and dedicate or acquire any property rights associated with those improvements, that the Town requires based on the data and findings of the accepted traffic impact analysis, the accepted master drainage study, the accepted WIP, the accepted master sewer plan, and other studies approved in connection with the approval of a preliminary plat or development plan for any portion of the Rezoning Area. 8. The final design of all streets and circulation facilities, including any gated or emergency access, must be accepted by the Northwest Fire District prior to Town Council consideration of a final plat for any portion of the Rezoning Area. 9. The Rezoning Area shall be limited to a maximum of 57 lots, laid out in substantial conformance with the tentative development plan attached as Exhibit A. Site disturbance in the 49-acre Rezoning Area shall not exceed 34% or 725,710 square feet. Ordinance No. 2021.016 -2- 8/16/2021 2:33 PM [CLR] Marana Town Council Regular Meeting Agenda Packet Page 118 of 395 November 19, 2024 10. No approval, permit or authorization by the Town of Marana authorizes violation of any Federal or State law or regulation or relieves the Property Owners from responsibility to ensure compliance with all applicable federal and state laws and regulations, including the Endangered Species Act and the Clean Water Act. The Property Owners should retain appropriate experts and consult appropriate Federal and State agencies to determine any action necessary to assure compliance with applicable laws and regulations. 11. The Property Owners shall transfer to Marana, by the appropriate Arizona Department of Water Resources form, those water rights being IGR, Type I or Type II for the Town providing designation of assured water supply and water service to the Rezoning Area. If Type I or Type II is needed on the Rezoning Area, the Town and the Property Owners shall arrive at an agreeable solution to the use of those water rights appurtenant to the affected portion of the Rezoning Area. 12. Prior to the issuance of any grading permits, the Property Owners shall submit evidence to the Town that all federal permit requirements have been met through the Army Corps of Engineers and the State Historic Preservation Office, if federal permits are required for the development of the Rezoning Area. 13. The Property Owners shall not cause any lot split of any kind without the written consent of the Town of Marana. 14. The Property Owners shall provide the necessary authorization and documentation from the Western Area Power Administration (WAPA) with the subsequent plat submittal. 15. All open space easements and wildlife corridors shall be left entirely undisturbed and in their natural desert state, except for necessary utility installations, which shall be revegetated. All such easements and corridors shall be dedicated to the appropriate entity, acceptable to the Town and at a time acceptable to the Town. All utilities shall be underground, and all utility trenches shall be revegetated to be identical with the surrounding desert with the exception of the overhead electric WAPA easement which shall be to WAPA specifications. 16. Lots 18-57 as designated on Exhibit A are restricted to one story and a maximum height of 20 feet. Two story homes are permitted on Lots 1-17 as designated on Exhibit A. 17. The preliminary plat for the Rezoning Area shall establish a minimum lot size of 6,000 square feet and the rezoning parcel will be mass graded. 18. There shall be no connectivity between Waycross Road, Martingale Lane, Bridle Way, or Abington Lane and any access point, right of way, road, or lot within the Rezoning Area. 19. There shall be a 120 - foot "No Disturbance" bufferyard along the southern boundary of the Rezoning Area (as identified on Exhibit A). 20. There shall be a 100 - foot "No Disturbance" bufferyard along the western boundary of the Rezoning Area (as identified on Exhibit A). Ordinance No. 2021.016 - 3 - Marana Town Council Regular Meeting Agenda Packet November 19, 2024 8/16/2021 2:33 PM [CLR] Page 119 of 395 21. The Property Owners, through the Town of Marana's normal notification process, shall notify the impacted parties, as specified in Exhibit B attached to and incorporated by this reference in this ordinance, if any request is made to modify, eliminate, or add to the conditions listed in this ordinance. 22. The minimum width of the two designated wildlife corridors shall be 230 feet and, where possible, revegetation shall occur in disturbed areas beyond the 230-foot minimum width. Reseeding with a native Mohave, Chihuahua and/ or Sonoran arid/ adapted mix of groundcovers, mid -story shrubs and canopy trees, including hackberry (Cletis pallida), is preferable for areas where it is impossible to reliably deliver water. 23. This Rezoning is subject to the Residential Design Standards found in the Marana Land Development Code as amended from time to time. 24. The Property Owners agree to enter into a finance contract establishing their contribution for schools. The Property Owners shall provide written documentation that an agreement with the Marana Unified School District is completed prior to the issuance of the first single-family residential building permit for the Rezoning Area. A receipt of payment shall be provided with each individual residential building permit. 25. No view fencing shall be allowed on lots facing the two wildlife corridors. 26. All outdoor lighting shall be down -lit and shall adhere to "dark sky -friendly" lighting design, and such language shall be placed in the Conditions, Covenants and Restrictions. 27. All Natural Undisturbed Open Space set -asides shall be protected in perpetuity, by either a Restrictive Covenant or Conservation Easement and such language shall be placed in the Conditions, Covenants and Restrictions. Prior to or upon requesting a building permit for any lot in the Rezoning Area, the Property Owners shall record a covenant, to run with the land, memorializing the terms of this condition. 28. Free -ranging domestic animals shall be prohibited in the subdivision and such language shall be placed in the Conditions, Covenants and Restrictions. 29. No side or backyard gates shall be constructed leading to undisturbed open space areas on each lot or within the two onsite wash corridors and such language shall be placed in the Conditions, Covenants and Restrictions. 30. Upon the effective date of this Ordinance, the Property Owners shall have a continuing responsibility to remove from the Rezoning Area invasive non-native species, including those listed in Exhibit C attached to and incorporated by this reference in this ordinance. Acceptable methods of removal include chemical treatment, physical removal, or other known effective means of removal. Property Owners and future owners of individual lots in the Rezoning Area shall keep private lots, including enclosed yards, free of invasive non-native plant species detailed in Exhibit C. Prior to or upon requesting a building permit for any lot in Ordinance No. 2021.016 -4- 8/16/2021 2:33 PM [CLR] Marana Town Council Regular Meeting Agenda Packet Page 120 of 395 November 19, 2024 the Rezoning Area, the Property Owners shall record a covenant, to run with the land, memorializing the terms of this condition. 31. The Property Owners shall place "no trespassing" signs along the south boundary of the Rezoning Area and signs directing people to stay out of the washes. 32. The Property Owners shall landscape the area near the emergency access roadway with a continuous row of shrubs at the time of the emergency roadway construction, as depicted on Exhibit A, the Tentative Development Plan. 33. The Property Owners shall incorporate Low Impact Development techniques to accommodate drainage such as rock -lined channels with sandy bottoms and one and two rock dams. 34. The Property Owners shall install a non -asphalt, stabilized all weather surface for the emergency access road. 35. The Property Owners shall construct a 6-foot decorative masonry wall along the back of lots 33-43 located along the south boundary to reduce noise and light impacts as depicted on Exhibit A, the Tentative Development Plan. 36. The Property Owners shall install wildlife -friendly fencing in one of two locations identified on Exhibit A, the Tentative Development Plan, prior to building permit approval of lot 44 to discourage the creation of unauthorized trails and ATV roads to access the Waycross neighborhood. 37. Property owners shall secure a license from WAPA, and provide evidence of, for the areas on Street A that encroach into the WAPA/TEP easement prior to approval of the preliminary plat. 38. Property owners shall secure, and provide evidence of, a license from WAPA for pedestrian access from the cul-de-sac on Street A to the recreation area for the residents of Lots 18-48 prior to approval of the preliminary plat. 39. The two wildlife corridors located on Town owned A.P.N. 214-04-1150 and identified on Exhibit A, the Tentative Development Plan, shall be preserved in perpetuity to ensure continued wildlife passage. The corridors will be subject to a restrictive covenant or conservation easement and protected with fencing and flagging during construction. 40. The Property Owners shall enter into an open space covenant with a reputable conservation entity to ensure that the open space areas approved within the Rezoning Area remain open space in perpetuity. 41. The Property Owners and future owners of individual lots in the Rezoning Area shall use the attached redlined Town of Marana Regulatory Plant List, Exhibit D, to vegetate all developable landscape areas in the Silverbell Ridge Rezoning area. Section 3. All ordinances, resolutions and motions and parts of ordinances, resolutions, and motions of the Marana Town Council in conflict with the provisions of this ordinance are hereby repealed, effective as of the effective date of this ordinance. Section 4. If any section, subsection, sentence, clause, phrase or portion of this ordinance is for any reason held to be invalid or unconstitutional by the decision of any Ordinance No. 2021.016 - 5 - Marana Town Council Regular Meeting Agenda Packet November 19, 2024 8/16/2021 2:33 PM [CLR] Page 121 of 395 court of competent jurisdiction, such decision shall not affect the validity of the remaining portions of this ordinance. PASSED AND ADOPTED by the Mayor and Council of the Town of Marana, Arizona, this 17th day of August, 2021. ATTE Cherry L. awson, own Clerk ley' Mayor Ed Honea APPROVED AS TO FORM: MARANA AZ ESTABLISHED 1977 'rall, Town Attorney Ordinance No. 2021.016 - 6 - Marana Town Council Regular Meeting Agenda Packet November 19, 2024 8/16/2021 2:33 PM [CLRI Page 122 of 395 TENTATIVE DEVELOPMENT PLAN Martingale Lane 6' Buffer between lot and northern property boundary 100' No Disturbance—�� Limit 709.16 *57 Pocket Park 3,200 sf i 43 42 41 40 39 * * * * * / Fence Location Option #2 Waycross Roa• 45' ROW Dedication by 2005 Silverbell & Ina Final Plat Park 13,900 sf 2181.31 Emergency Access Only (non -asphalt, stabilized all-weather surface) Roadway area adjacent to wash to be landscaped with a continuous row of shrubs. / ' I Lots 33-43, 6' Decorative Masonry Wall Required Site Boundary (56.44 ac) Subject Property (49.aoac) Marana Parcel (APN: 214-04-1150) Dedicated to Town per the Final Plat for Ina & Silverbell (Book 61 Page 20) (7.44 ac) 45' ROW Dedication by 2005 Ina & Silverbell Final Plat (Book 61, Page 20-2) (2.34 ac) 57 Proposed Lot (TYP Lot size is 55' x 110', Minimum 6,000 sf) Natural Undisturbed Open Space (NUOS) Total: 32.34 ac (1,408,730 sf) of the Subject Property Recreation Area Total: 17,100 sf (May consist of habitat gardens, seat walls, picnic areas, play structures, shade structure, etc. Emphasis on passive recreation) Slopes Greater than 15% Park Connection Path 2015 Wildlife Corridor (200' Minimum Width) Proposed Wildlife Corridor Wildlife Friendly Fencing to Prevent ATVs FEMA Floodplain Limits Erosion Hazard Setback Single -story Restriction Lots 18 - 57 (Single -story building height not to exceed 20') 120' WAPA/TEP Easement Pb`o, Road Silverbell Ridge Estates SOP ALE: 1'-2 -cr PROJECT: CAC-06 DATE:07/28/21 FILE NAME, CAC-0o TJP.DWG NOPTM u THFFSANMNGCEMER gem „ate ,Zn @m Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 123 of 395 LEGEND 1111 Subject Property 177 imparted Parties IMPACTED PARTIES 1 6701 N Waycross Rd 2 6745 N Waycross Rd 3 6750 N Waycross Rd 4 6760 N Waycross Rd 5 5660 W Abington Ln 6 6745 N Abington Rd 7 6760 N Abington Rd 8 6700 N Abington Rd 9 5651 W Abington Ln 10 6650 N Waycross Rd 11 5855 W Abington Ln 12 6645 N Waycross Rd 13 5460 W De Green Ln 14 5445 W De Green Ln 15 5650 W Belmont Rd 16 5930 W Belmont Rd 17 5740 W Belmont Rd Belmont Road EXHIBIT "B" PACED,PARTISet / FIL E tI ALI fo g.-6-1e4s4ibflgB_SKS_CAS-06 IJRCIE Pima County GIS 2021 November 19, 2024 Exhibit C Invasive Non -Native Plant Species Subject to Control Scientific Name Common Name Ailanthus altissima Tree of Heaven Alhagi pseudalhagi Camelthorn Arundo donax Giant reed Baccharis sarothroides Desert Broom Brassica tournefortii Sahara mustard Bromus rubens Red brome Bromus tectorum Cheatgrass Centaurea melitensis Malta starthistle Centaurea solstitalis Yellow starthistle Cynodon dactylon Bermuda grass (exclude sod hybrid) Digitaria spp. Crabgrass Elaeagnus angustifolia Russian olive Eragrostis spp. Lovegrass (exclude E. intermedia, plains lovegrass) Melinis repens Natal grass Mesembryanthemum spp. Iceplant Oncosiphon piluliferum Globe Chamomile aka Stinknet Peganum harmala African rue Pennisetum ciliare Buffelgrass Pennisetum setaceum Fountain grass Rhus lancea African sumac Salsola spp. Russian thistle Schinus spp. Pepper tree Schismus arabicus Arabian grass Schismus barbatus Mediterranean grass Sorghum halepense Johnson grass Tamarix spp. Tamarisk 7/16/2021 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 125 of 395 Exhibit D Town of Marana *Redlined Town of Marana Regulatory Plant List (Acceptable Silverbell Ridge subdivision OFFICIAL REGULATORY PLANT LIST vegetation as determined and redlined by Coalition for Sonoran Desert Protection on LOW WATER USE / DROUGHT TOLERANT PLANT LIST 7/12/21) The plants on this list can be grown with moderate to no supplemental irrigation once they are established. Occasionally, for good appearance, supplemental irrigation may be applied during the growing season. In addition to the cacti on this list, any cacti salvaged and tagged in compliance with state agricultural and horticultural regulations may be used. All of the plants on the Plant List meet the Arizona Department of Water Resources (ADWR) standard for low consumption. Some plants on the list may fall under more than one plant type category (e.g. Acacia constricta can be grown as a tree or a shrub depending upon the growth habit that is preferred). Applications for additions, deletions or exceptions to the list may be submitted to the Zoning Administrator. Key to symbols: A - Accent Plant * - Toxic; may be harmful if eaten. (For more information call Arizona Poison Control Center at (520) 626-6016.) C - Cactus Gc - Groundcover - Invasive -- may spread and intrude into natural areas. Gr - Ornamental Grass sh - Semi -hardy -- some dieback in a hard frost S - Shrub (t) - Tender ( may be severely damaged or killed in a hard frost) Sc - Succulent (other than cacti) # - Exceptions to the nomenclature in Hortus III. T - Tree an - Annual ✓ - Vine p - Perennial cl - Seasonal Color (showy flowers, fall color or berries). CD - Chihuahuan Desert Region - (broadly interpreted to include a large area of north central and northwest Mexico, southwest Texas, southern New Mexico and extreme southeast Arizona.) SD - Sonoran Desert Region - (broadly interpreted to include the arid and semi -arid areas of northwest Mexico, southeast California and most of Arizona south of the Mogollon Rim.) (Note: Chihuahuan and Sonoran Desert Regions annotated by Matt Johnson, Native Plant Society.) Approximate Watering Needs (depending on soil and climate conditions) 1 - No supplemental irrigation once established. 2 - Once a month during the growing season once established. 3 - Twice a month during the growing season once established. 4 - Once a week during the growing season once established. Revised 10/01 Title 17 — Environmental Resource, Native Plant & Landscape Page 31 of 42 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Ord.200page 126 of 395 TOWN OF MARANA, ARIZONA LAND DEVELOPMENT CODE TABLE 7-2 Town of Marana OFFICIAL REGULATORY PLANT LIST BOTANICAL NAME COMMON NAME STATUS ORIGIN NEEDS HARDY Abronia villosa Sand verbena Gc, an SD 1 Acacia aby Abyssinian Acacia T Africa 2 {sh) cinica Acacia ancura a T Australia 2 {s#} Acacia angustissima White Ball Acacia S SD 2 (sh) Acacia berlandieri Guajillo S,T CD 3 Acacia constricta Whitethorn Acacia, Mescat T,S* SD, CD 1 Acacia crascpcdocarpa Waxioof Acacia T,S Australia 4- Acacia cultriformis Knife Leaf Acacia T,S Australia 2 {sh) Acacia greggii Cat's Claw Acacia T,S SD, CD 1 Acacia minuta (smallii) Southwestern Sweet Acacia T,S,ci SD, CD 2 Acacia notabilis Acacia S Australia 2. Acacia redolcns Prostrate Acacia S,Cc Australia 2 Acacia rigidula Black Brush Acacia S,T CD 3 Acacia salicina Wccping Wattic T,cl Australia 2 {sh) Acacia saligna Wattic Trcc T Australia 4-2 (oh) Acacia schaffneri Twisted Acacia T CD 1-2 Acacia stcnophylla Pcncillcaf Acacia T Australia 4-2 Acacia willardiana Palo Blanco T SD 1-2 (sh) Agave americana Century Plant Sc CD 1-2 Agave colorata Agave Sc SD 1 Agave filifera Agave Sc CD 1-2 Agave huachucensis Huachuca Agave Sc SD 1-2 Agave lophantha (univittata) Agave Sc CD 2 Agave ocahui Ocahui Agave Sc SD 1-2 Agave palmeri Palmer Agave Sc SD 1 Agave victoriae-reginae Victoria Regina Agave Sc CD 1-2 Agave vilmoriniana Octopus Agave Sc SD 1-2 (sh) Aloc barbadensis Barbados Aloe Steel Africa 2 3 {sh) Aloe fcrox Capc Aloc Se—,e1 Africa 2 3 {sh) Aloc saponaria Mediterranean Se77el Africa 2 3 (sh) Aloe Aloysia gratissimma Fragrant Bush, Bee Brush S SD, CD 2 Aloysia wrightii Wright's Oregano, Lemon Verbena S SD, CD 2 Ambrosia (Franseria) Triangle -leaf S SD Revised 10/01 Title 17 — Environmental Resource, Native Plant & Landscape Page 32 of 42 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Ord.200 ,7age 127 of 395 TOWN OF MARANA, ARIZONA LAND DEVELOPMENT CODE BOTANICAL NAME COMMON NAME STATUS ORIGIN NEEDS HARDY deltoidea Bursage Ambrosia (Franseria) dumosa White Bursage S SD 1 Anisacanthus thurberi Desert Honeysuckle S SD 2 Antigonon leptopus Queen's Wreath V,cl SD 2-3 (t) Aristida purpurea Purple Three -Awn Gr,cl SD, CD 1 Asclepias linaria Pine -Leaf Milkweed S SD, CD 2 Asclepias subulata Desert Milkweed A SD 2 (sh) Aster bigelovii Aster an SD 1 (t) Aster tanacetifolius Aster an SD, CD 1 (t) Atriplex canescens Four -Wing Saltbush S SD, CD 1 Atriplex Ientiformis Quail Bush S SD 1 Atriplex Ientiformis breweri Brewer Saltbush S SD 1-2 Atriplcx nummularia Old Man Saltbush S Australia 4. Atriplex polycarpa Desert Saltbush S SD 1 Atriplcx ocmibaccata Australian Saltbuch S Australia 2 Baccharis sarothroides Desert Broom STl SD 4-2 (male plants only) Baccharis sarothroidca Centennial STGe SD 2 3 'Centennial' Bahia absinthifolia Desert Daisy p,cl SD 2 Baileya multiradiata Desert Marigold p,cl* SD, CD 1-2 Berberis harrisoniana Barberry S SD 3 Berberis trifoliata Agritos S SD 3 Bothriochloa barbinodis Cane Beardgrass Gr,cl SD, CD 1 Bougainvill a spp. V,S,cl Brazil 2 (44 Bouteloua chondrosioides Sprucetop Grama Gr SD, CD 2 Bouteloua curtipendula Sideoats Grama Gr,cl SD, CD 2 Bouteloua eriopoda Black Grama Gr,cl SD 3 Bouteloua gracilis Blue Grama Gr SD, CD 2 Bouteloua hirsuta Hairy Grama Gr SD 2 Bouteloua rothrockii Rothrock Grama Gr SD, CD 1 Brachychiton Bottle Tree T Australia 2 3 populncu:, Brahea (Erythea) armata Mexican Blue Palm T SD 2-3 Buchloe dactyloides Buffalo Grass Gr CD 2-3 Buddleia marrubifolia Wooly Butterfly Bush S,cl CD 2-3 Caesalpinia (Poinciana) mexicana, Mexican Bird of Paradise (yellow) S,cl* CD 2 Title 17 — Environmental Resource, Native Plant & Landscape l'agc 33 of 42 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Revised 10/01 Ord.200'kr-lige 128 of 395 TOWN OF MARANA, ARIZONA LAND DEVELOPMENT CODE BOTANICAL NAME COMMON NAME STATUS ORIGIN NEEDS HARDY Cacsalpinia (Poinciana) Yellow Bird S,cr Argentina 4-2 gilliccii of Paradise Cacsalpinia Rcd Bird of Paradise S,cl* Caribbean 3 Oh) pulchcrrima Calliandra californica Red Fairy Duster, Baja Fairy Duster S,cl SD 2-3 Calliandra eriophylla Fairy Duster, False Mesquite S,cl SD 1 Calliandra peninsularis Red Calliandra, Baja Fairy Duster S,cl SD 2-3 (sh) Callistcmon Lemon Bottlebrush T,S,ci Australia 3 citrinus (sh) Calylophus hartwegii Calylophus Gc,cl CD 3 Campsis radicans Common Trumpet Creeper V,cl SD, CD 2-3 Carnegiea gigantea Saguaro C SD 1 Carpobrotus 'cc Plant Cc,Sc,cl, Africa 3 03 cdulis Cassia artemisioidcs Wormwood S,ci Australia 2-3 (sh) Senna, Feathery Cassia Cassia ncmophila Crecn Cassia S,ci Australia 2 (crcmophila) Cassia Silvery Cassia S,ci Australia 2 3 phyllodinoa Casuarina Australian Pine T Australia 3 cunninghamiana Casuarina Coast Bccfwood T Australia 2-3 stricta Cathostecum erectum False Grama Gr,cl SD 1 Celtis pallida Spiny or Desert Hackberry S SD, CD 1-2 Celtis reticulata Netleaf or Western Hackberry T SD, CD 2 Centaur a Dusty Miller Mediterranean 3 cincraria p,ci Cephalophyllum 'Red Spike' Red Spike Ice Plant Gc,Sc,cl 2 Ccratonia Carob, St. John's T Mediterranean 3 (sh) siliqua Bread Tree Cercidium floridum Blue Palo Verde T,cl SD 2-3 Cercidium microphyllum Littleleaf or Foothill Palo Verde T,cl SD 1 Cercidium praecox Palo Brea T,cl SD 2 (sh) Cercidium sonorae Sonoran Palo Verde T,cl SD 1-2 Cercis canadensis var. mexicana Mexican Redbud T,S CD 3 Ccrcus Peruvian Cereus G South America 4-2 Esia-) peruvianus 'Monstrosus' Chamacrops humilis Mediterranean Fan T Spain 2-3 Palm Chilopsis linearis Desert Willow T,S,cl SD, CD 2-3 Title 17 — Environmental Resource, Native Plant & Landscape Page 34 of 42 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Revised 10/01 Ord.200p1a�e 129 of 395 TOWN OF MARANA, ARIZONA LAND DEVELOPMENT CODE BOTANICAL NAME COMMON NAME STATUS ORIGIN NEEDS HARDY Cisus incisa Desert Crape Ivy 14 613 4-2 Cissus trifoliata Desert Grape Ivy V SD 1-2 Condalia warnockii var. kearneyana Condalia S SD, CD 1 Convolvulus cncorum Bush Morning Clory S,Cc,cl* Mediterranean 4 2 Convolvulus Cround Morning Cc,cl Africa 3 mauritanicus Clory (sh) Cordia boissieri Anacahuita, Texas Olive T,S,cl CD 2-3 (sh) Cordia parvifolia Littleleaf Cordia S,cl SD, CD 1-2 Cortadcria sclloana Pampas Gras 6+ Argentina 3 Cupressus arizonica Arizona Cypress T SD, CD 2 Cupressus glabra Smooth Bark Cypress T SD 2-3 Dalbcrgia sisoo Rosewood T India 3 {oh) Dalea bicolor var. argyrea Silver Dalea S SD 2-3 Dalea frutescens Black Dalea S,cl CD 2-3 Dalea greggii Trailing Indigo Bush Gc CD 2-3 Dalea pulchra Indigo Bush S,cl SD 2-3 Dalea versicolor var. sessilis Indigo Bush, Dalea S,cl SD 3 Dasylirion acrotriche Green Desert Spoon A CD 1 Dasylirion wheeleri Soto!, Desert Spoon A SD, CD 1 Datura wrightii Sacred Datura Gc,p,cl* SD 3 (sh) Digitaria californica Arizona Cottontop Gr SD, CD 4 Dimorphothcca African Daisy, South Africa 4 sinuata Cape Marigold an,cl Dodonaea viscosa Hopbush S SD, CD 1-2 (sh) Dyssodia acerosa Dogweed Gc,p,cl,S D,CD SD, CD 2-3 Dyssodia Dysodia Cc,an,p,c SD,CD 2 3 pcntachacta l Echinocactus grusonii Golden Barrel C,cl SD 1-2 Echinocereus spp. Hedgehog, Rainbow Cactus C,cl SD, CD 1 Echinopsis Easter Lily, Sea C,cl So. America 4 spp. Urchin Cactus Encelia californica California Brittlebush (green) S,cl SD 1-2 (sh) Encelia farinosa Brittlebush S,cl SD 1-2 (sh) Ephedra nevadensis Ephedra S SD 3 Eragrostis intcrmcdia Plains lovcgras 6f SD, CD 4 Ercmophila dccipicns Emu Bush S,cl Australia 4- Revised 10/01 Title 17 — Environmental Resource, Native Plant & Landscape Page 35 of 42 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 ��ic4 '2()' Page 130 of 395 TOWN OF MARANA, ARIZONA LAND DEVELOPMENT CODE BOTANICAL NAME COMMON NAME STATUS ORIGIN NEEDS HARDY Erioneuron pulchellus Fluffgrass Gr SD, CD 1 Eschscholtzia californica California Poppy an,cl SD 2-3 Eschscholtzia mexicana Mexican Gold Poppy an,cl SD 3 Eucalyptus Red River Gum T Australia 2 camaldulensis Eucalyptus campaspe Silver Gimlet T Australia 2-a (oh) Eucalyptus formanii Eucalyptus T Australia 2 Eucalyptus Icucoxylon Whitc Iron Bark T,cl Australia 2 (roscca) Eucalyptus microthcca Tiny Capsule T Australia 4 2 Eucalyptus Eucalyptus Silver Dollar Cum T Australia 2 polyanthcmos Eucalyptus rudis Des T Australia 2 Eucalyptus Swamp-Mallee T Australia 3 spathulata Euphorbia antisyphilitica Wax Plant, Candelilla S CD 1 Euphorbia myrsinites Euphorbia Gc 2 Euphorbia rigida Gopher Plant A,Sc,cl* Africa 2 (biglandulosa) Africa Fcijoa scllowiana Pineapple Guava T,S,cl So. America 3 Ferocactus spp. Barrel Cactus C,cl SD, CD 1 Fouquieria splendens Ocotillo A,cl SD, CD 1 Gaillardia pulchella Fire Wheel, Blanket Flower an,cl CD 3 Cazania rigcns 'Copper Copper King Cc,cl Africa King' Cazania Gazania rigcns Treasure Flower Cc,cl Africa 4 Gazania Gazania rigcns, Trailing Gazania Cc,cl Africa 2-4 (4) lcucolacna Ccoffreya (Courleia) Chilean Palo T,cl So. America 4 dccorticans Verde Gossypium harknessii Gossypium S,cl SD 2 (t) Haplopappus (Ericameria) Iaricifolius Turpentine Bush S,cl SD, CD 1 Hesperaloe funifera Giant Hesperaloe A CD 1-2 Hesperaloe parviflora Red Yucca, Red Flowered Hesperaloe A,cl CD 1-2 Hetropogon contortus Tanglehead Gr SD 3 Hibiscus coulteri Yellow Hibiscus, Coulter's Hibiscus S SD, CD 2 Hilaria berlangeri Curly Mesquite Gr SD, CD 2 Hilaria mutica Tobosa Grass Gr SD, CD 1 Hilaria rigida Big Galleta Grass Gr SD, CD 2 Revised 10/01 Title 17 — Environmental Resource, Native Plant & Landscape Page 36 of 42 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Ord.200Pd16e 131 of 395 TOWN OF MARANA, ARIZONA LAND DEVELOPMENT CODE BOTANICAL NAME COMMON NAME STATUS ORIGIN NEEDS HARDY Hyptis emoryi Desert Lavendar S SD 3 (sh) Jatropha cardiophylla Limberbush S SD 1 Jatropha dioica Jatropha S,cl CD 1 (t) Juniperus chincncis Juniper Asia 4 (many culitvars) Juniperus deppeana Alligator Bark Juniper T SD, CD 3 Juniperus sabina Arcadia Juniper S 3 'Arcadia' Justicia (Beloperone) californica Chuparosa S,cl SD 2-3 Justicia candicans Red Jacobinia S,cl SD 3 (sh) Justicia spicigera Mexican Honeysuckle, Firecracker Bush S,cl SD 3 (sh) Lantana camara Bush Lantana (many cultivars) S,cl* No. America 3-4 (t) Lantana montevidensis Trailing Lantana Gc,cl* S. Am. So. America 3-4 (t) Larrea tridentata (divaricata) Creosote Bush, Greasewood S,cl SD, CD 1 Leptochloa dubia Green Sprangle-Top Gr CD 3 Leucaena retusa Golden Leadball T,S,cl CD 1-2 Leucophyllum spp. Texas Ranger (all cultivars) S,cl CD 2 Linum grandiflorum ' Rubrum' Scarlet Flax Gc,an,cl 3 Linum lewisii Blue Flax an,cl SD, CD 3 Lupinus arizonicus Lupine an,cl SD 1 Lupinus sparsiflorus Desert Lupine an,cl SD 1 Lupinus succulentus Arroyo Lupine an,cl SD 1 Lycium exsertum Lycium S SD 1 Lycium fremontii Wolfberry S SD 1 Lysiloma thornberi Feather Tree T,S SD 2-3 (sh) Macfadyena unguis-cati Cat's Claw Vine V,cl America 2-3 Malephora Croceum, Ice Cc,Sc,cl 2 3 crocea Plant Mamillaria spp. Mamillaria Cactus C,cl SD, CD 1-2 Mascagnia lilacina Lavender Orchid Vine V,cl CD 2-3 Mascagnia macroptera Yellow Orchid Vine V,cl SD, CD 2-3 (sh) Maytenus phyllanthoides Mangle Dulce S SD, CD 2 Revised 10/01 Title 17 — Environmental Resource, Native Plant & Landscape Page 37 of 42 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 (hd?OO ,Jage 132 of 395 TOWN OF MARANA, ARIZONA LAND DEVELOPMENT CODE BOTANICAL NAME COMMON NAME STATUS ORIGIN NEEDS HARDY Melampodium leucanthum Blackfoot Daisy Gc,p,cl SD,CD SD, CD 2 Merremia aurea Yellow Merremia V,cl SD 2-3 (t) Mimosa dysocarpa Velvetpod S,cl SD 2 Muhlenbergia dumosa Bush Muhlenbergia, Bamboo Muhly Gr SD 3-4 Muhlenbergia emersleyi Bullgrass Gr,cl SD 1 Muhlenbergia porteri Bush Muhly Gr,cl SD, CD 1 Muhlenbergia rigens Deer Grass Gr SD 3 Muhlenbergia rigida 'Nashville' TM Gr,cl SD 3 Fe Australia 2 Myrtus communis Truc Myrtle, S Mediterranc\an 2 Myrtus communis Twisted Myrtle S# Mediterranean a Boctica' Myrtus communis �aff--My441-e S Mediterranean 3 `Compact Nandina domcctica Heavenly Bamboo 8,cl 2 {many cultivars) Ncrium of andcr Oleander S,cl* Asia 2 3 (many cultivars) Nolina bigelovii Beargrass A SD 1-2 Nolina matapensis Tree Beargrass A,T SD 1-2 Nolina microcarpa Beargrass A SD 1-2 Nolina parryi Parry's Beargrass A SD 1-2 Oenothera berlandieri (speciosa childsii) Mexican Evening Primrose Gc,cl CD 3 Oenothera caespitosa Tufted Evening Primrose p,cl SD 2-3 Oenothera stubbei Chihuahuan Primrose, Baja Primrose Gc,cl CD 2-3 Olea curopaca Swan Swan Hill Olive T Mcditcrranoan a 1.4111 Olneya tesota Desert Ironwood, Tesota T SD, CD 1 (sh) Opuntia spp. Prickly Pear, Cholla C SD, CD 1 Oryzopsis hymenoides Indian Ricegrass Gr SD, CD 3 Ostcospermum Trailing African Cc,cl Africa 3-4 (sh) f-Futieestifft Daisy Pappophorum mucronulatum Pappusgrass Gr SD 1 Parkinsonia aculcata Mexican Palo T,I,cl SD, CD 4 2 Verde Revised 10/01 Title 17 — Environmental Resource, Native Plant & Landscape Page 38 of 42 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Ord 2OOP�lge 133 of 395 TOWN OF MARANA, ARIZONA LAND DEVELOPMENT CODE BOTANICAL NAME COMMON NAME STATUS ORIGIN NEEDS HARDY Passiflora foetida Passion Flower V SD 3 (sh) Pedilanthus macrocarpus Slipper Flower A,Sc,cl* SD 2 Pennicctum sctaccum Purple Fountain Gf Africa 1-2 'Cuprcum' Crac Penstemon baccharifolius Cutleaf Penstemon p,cl CD 1 Penstemon barbatus Beardtongue Penstemon p,ci SD, CD 1 Penstemon eatoni Eaton's Penstemon p,cl SD 1 Penstemon parryi Parry Penstemon p,cl SD 1 Penstemon pseudospectabilis Canyon Penstemon, Mohave Beardtongue p,cl SD 1 Penstemon superbus Superb Penstemon p,cl CD 1 Pcntzia incana Karoo Bush Ge Africa 1-2 Phacelia campanularia Desert Canterbury Bells an,cl SD 2-3 Phacelia tanacetifolia Tansy Phacelia an,cl SD 2-3 Phoenix Canary Island Date-P T 3 canariensis Phoenix dactylifcra gate T Asia 3 -Rai -RI Phyla nodiflora Lippia Cc,cl 2,4 Pinus Pinon Nut Pine T 2 3 edulis Pinus cldarica Afghan Pine T# Asia 2 Pinus halcpcnois Aleppo Pine T Mediterranean 2 Pinus monophylla Singlcleaf Pilion T Mojave 2 Pine Pinus Italian Stonc Pine T Mediterranean 2 3 pine Pinus roxburghii Chir Pine T Asia 3 Pistacia atiantica Mt. Atlas Piotachc T Africa 2 Pistacia chincnsis Chinese Pistache T,cl Asia 3 Pistacia tcrcbinthus Piotachc hybrid Tel 3 x intcgcrrima tcrcbinthus x integcrrima Pistacia vcra Pistachio T Asia 23 Pithecellobium flexicaule Texas Ebony T CD 2 (sh) Pithecellobium mexicanum Mexican Ebony T SD 3 Pithecellobium pallens Tenaza T CD 2 (sh) P-itteseaFtifFi Willew Pittosporum T Australia 2 phillyraeoidcs Plantago spp. Indian Wheat an SD, CD 1-2 Title 17 — Environmental Resource, Native Plant & Landscape Page 39 of 42 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Revised 10/01 Ord.200IPlge 134 of 395 TOWN OF MARANA, ARIZONA LAND DEVELOPMENT CODE BOTANICAL NAME COMMON NAME STATUS ORIGIN NEEDS HARDY Prosopis (So. Am. hybrid) Thornless Mesquite (So. Am. hybrid) T# So. America 2 Prosopis alba Argentine T-# So. America 2 Mesquite Prosopis chilenois Chilean Mesquite 1# So. America 2 Prosopis glandulosa glandulosa Honey or Texas Mesquite T# CD 2 Prosopis pubescens Screwbean Mesquite T SD, CD 2 Prosopis velutina Velvet Mesquite T# SD 2 Psilostrophe cooperi Paper Flower p,cl SD, CD 2 Punica granatum Pomegranate S,T,cl India 2 3 Pyracantha (rcd berried Pyracantha S,cl 3 t (many cultivars) s) Quercus arizonica Arizona White Oak T SD, CD 3 Quercus emoryi Emory Oak T SD, CD 3 Qucrcus ilex Holly Oak T 3 Qucrcus cubcr Cork Oak Mediterranean 2 Qucrcus virginiana Heritage Live Oak T SE U.S.A. 3 'Heritage' Rhus lancoa African Sumac l Africa 2 Rhus microphylla Littleleaf Sumac S,cl CD 2 Rhus ovata Sugar Bush, Sugar Sumac S SD 2 Rhus virens Evergreen Sumac S,cl CD 2 Rosa bankciac Lady Banks Rose, S,Gc,V 3 Tombstone Rose Roomarinus officinalio Bush Rosemary S,cl Mediterranean 2-3 Roomarinus Dwarf Trailing Gc,,el Mediterranean 2 3 officinalis ' Prootratus' or Rosemary Ruellia californica Ruellia S,cl SD 3 (t) Ruellia peninsularis Ruellia S,cl SD 3 (t) Ruochia uncinatus Ruochia Sc,Cc 2- Salvia chamaedryoides Blue Sage S,p,cl CD 2-3 Salvia clevelandii Cleveland Sage S,cl 3 Salvia columbariae Chia an,cl SD 3 Salvia farinacea Mealy Blue Sage S,cl CD 3-4 Salvia greggii Texas Red Salvia, Autumn Sage S,cl CD 2-3 Salvia mohavensis Mohave Sage S,cl SD 2 Sambucus mexicana Mexican Elderberry T SD, CD 2 Santolina t-avendar Cotton S,Gc Meditcrran 2 3 on chamaccypariscus Revised 10/01 Title 17 — Environmental Resource, Native Plant & Landscape Page 40 of 42 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Ord 2001Page 135 of 395 TOWN OF MARANA, ARIZONA LAND DEVELOPMENT CODE BOTANICAL NAME COMMON NAME STATUS ORIGIN NEEDS HARDY Santolina vircns Crccn Santolina Gc,S,cl Mediterranean 2-4 Mcdit. Sapindus saponaria Soapberry T* SD, CD 3-4 Schinus mollo California Pepper T So. America 2 3 Tree Scnccio cincraria Dusty Miller, SIIVCF 2 Plant p,cl* Senna covesii Desert Senna p,cl SD 1-2 Senna Iindheimeriana Senna S CD 4 (sh) Senna wislizenii Cassia, Shrubby Senna S,p,cl SD, CD 2 Sesuvium verrucosum Scaa Purslane, Ice Ge Africa 2 (43 Plant Setaria macrostachya Plains Bristle Grass Gr SD, CD 3 Simmondsia chinensis Jojoba, Goat Nut S SD 1-2 Sophora secundiflora Mescal Bean, Texas Mountain Laurel S,T,ci* CD 2-3 Sphaeralcea spp. Globe -Mallow p,cl SD, CD 1 Sporobolus airoides Alkali Sacaton Gr SD, CD 3 Sporobolus contractus Spike Dropseed Gr SD, CD 1 Sporobolus cryptandrus Sand Drops Gr SD, CD 3 Sporobolus flexuosus Mesa Dropseed Gr SD, CD 2 Sporobolus wrightii Sacaton Gr SD, CD 1 Stenocereus (Lemaireocereus) thurberi Organ Pipe Cactus C SD 1 Stipa neomexicana New Mexico Feathergrass Gr SD, CD 2 Tagetes lemmoni Mountain Marigold p,cl SD 3-4 Tamarix Athcl Trcc, 4 Asia 4- aphylla Tamarisk Tamarix Spring Flowering T,S,I Asia 2 parviflora or chinensia Salt Cedar Tecoma stans var. angustata Trumpet -Bush S,cl SD, CD 2-3 (sh) Tccomaria capcnsi;, Capc Hone S,c4 Africa 4 (sh) suckle Tcucrium chamacdrys Prostrate GeTp Mediterranean 2 3 (prostratum) Ccrmandcr Tcucrium fruticans Bush Germander S 3 Trucklers crinita Two -feather Trichloris Gr SD, CD 2 Trichocereus spp. Trichocerius Cactus C 1-2 Tridens muticus Slim Tridens Gr SD, CD 2 Revised 10/01 Title 17 — Environmental Resource, Native Plant & Landscape Page 41 of 42 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Ord.200 ,jage 136 of 395 TOWN OF MARANA, ARIZONA LAND DEVELOPMENT CODE BOTANICAL NAME COMMON NAME STATUS ORIGIN NEEDS HARDY Ungnadia speciosa Mexican Buckeye T,cl CD 3 Vauquelinia californica Arizona Rosewood S,T# SD 2 Verbena gooddingii Goodding Verbena p,cl SD 3-4 Verbena Peruvian Vcrbcna So. Amcrica 4 peruviana p7et Vcrbcna tenuisccta N1o: Vcrbena, 13761 So. Amcrica a (pulchclla) c Fincicaf Verbena Verbesina encelioides Crown Beard an,cl SD, CD 2 Viguiera deltoidea Golden Eye p,cl SD 2 Vitcx agnus Chaste Trcc, T,S,ci 2 castus Monks Pepper Wachingtonia filifcra California Fan T S•D 2 Wachingtonia robucta Mcxican Fan Palm T &ID 23 (ch) Xylocma congcctum Xylocma T,S China 3-4 Yucca aloifolia Spanish Bayonet Yucca A SD 1 Yucca baccata Banana Yucca A SD, CD 1 Yucca brevifolia Joshua Tree A CD 1 Yucca carnerosana Giant Dagger Yucca A CD 1 Yucca elata Soaptree Yucca A SD, CD 1 Yucca glauca Small Soapweed Yucca Sc U.S.A. 1 Yucca recurvifolia (pendula) Pendulous or Curveleaf Yucca A U.S.A. 2 Yucca rigida Blue Dagger Yucca A,cl CD 1 Yucca rostrata Beaked Yucca A CD 1 Yucca schottii Mountain Yucca Sc SD 1 Yucca treculeana Tree Yucca A CD 1 Yucca whipplei Our Lord's Candle A SD 1 Zauschneria californica Hummingbird Trumpet Gc,cl SD 3 Zinnia acerosa Desert Zinnia p,cl SD, CD 1 Zinnia grandiflora Rocky Mountain Zinnia p,cl CD 2 Zizyphus Chinese Date T-4 As4e 2 jujuba List Sorted Alphabetically by Botanical Name Revised 10/01 Title 17 — Environmental Resource, Native Plant & Landscape Page 42 of 42 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Ord.200 ,jage 137 of 395 EXHIBIT E LEGAL DESCRIPTION THE LAND REFERRED TO HEREIN BELOW IS SITUATED IN THE COUNTY OF PIMA, STATE OF ARIZONA, AND IS DESCRIBED AS FOLLOWS: Blocks 1, 2 and 3, SILVERBELL RIDGE ESTATES, according to plat recorded in Sequence No. 20182500098, records of Pima County, Arizona. APN: 214-04-1170, 214-04-1180 and 114-04-1190 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 138 of 395 MARANA ESTABLISHED 1 9 7 7 Council -Regular Meeting A2 Meeting Date: 11/19/2024 To: Mayor and Council Submitted For: Jason Angell, Development Services Director From: Date: Dustin Ward, Development Engineering Division Manager November 19, 2024 Strategic Plan Focus Area: Not Applicable Subject: Ordinance No. 2024.025: Relating to Land Development, adopting the Town of Marana Drainage Manual (Jason Angell) Resolution No. 2024-103: Relating to Land Development, declaring as a public record filed with the Town Clerk the Town of Marana Drainage Manual adopted by Ordinance No. 2024.025 (Jason Angell) Discussion: The Town of Marana (Town) has prepared this Drainage Manual for the civil engineering and floodplain management community designing improvements within the Town limits. Historically, the Town has relied on regional standards and methods in the hydrology/hydraulic discipline that mainly originated in the City of Tucson and Pima County. The core purpose of this manual is to compile the Town's policies by taking into consideration the historically used regional standards and methods, but modifying standards to be more reflective of Marana's topography and culture. With the Town's growth over the last several years, staff have observed that there is a need to position the Town so that we are not reliant on other jurisdictions for drainage standards. Creating the Town of Marana Drainage Manual will allow the Town to decide how we will require drainage to be designed. This will also position us to guide development in a direction that allows us to protect our residents, foster town growth, provide consistency within the developments, and maintain our relationships with the development community. Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 139 of 395 The current drainage design practices across the Town have been inconsistent in terms of the methods used while constant in their approach to design. The Drainage Manual will set the standards, making the designs consistent with the developments. It will also provide guidance to new developers who are developing within the Town. The manual, as developed, has pulled together the relevant design standards from jurisdictions within the region that staff have determined to align with the Town's master plan. As part of the development of the Drainage Manual, Town staff worked with SAHBA and the engineers within the development community to get feedback on the manual. We evaluated all the feedback received for the impact on the residents, staff, and the community; we incorporated the suggestions that were in the Town's best interest. Staff Recommendation: Staff recommends adopting the Town of Marana Drainage Manual as the Town standard for drainage development. Suggested Motion: I move to adopt Ordinance No. 2024.025, adopting the Town of Marana Drainage Manual, and Resolution No. 2024-103, declaring the Drainage Manual as a public record filed with the Town Clerk. Ordinance No. 2024.025 Resolution No. 2024-103 Exhibit A - Drainage Manual Attachments Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 140 of 395 MARANA ORDINANCE NO. 2024.025 RELATING TO LAND DEVELOPMENT; ADOPTING THE TOWN OF MARANA DRAINAGE MANUAL WHEREAS A.R.S. §48-3610 authorizes an incorporated city or town to assume floodplain management powers and duties within its area of jurisdiction; and WHEREAS the Town of Marana has assumed floodplain management powers and duties within its area of jurisdiction via the adoption of Marana Town Code Chapter 17- 15 "Floodplain and Erosion Hazard Management Code" to promote the public health, safety and general welfare of its citizens; and WHEREAS Town staff has promulgated the Town of Marana Drainage Manual, providing general commercial and residential development regulations for developing properties within the Town of Marana; and WHEREAS the Mayor and Council find that the approval of the proposed Town of Marana Drainage Manual is in the best interest of the residents and businesses of the Town of Marana. NOW, THEREFORE, BE IT ORDAINED by the Mayor and Council of the Town of Marana as follows: SECTION 1. The Town of Marana Drainage Manual, one paper copy and one electronic copy of which are on file in the office of the Town Clerk, which was made a public record by and attached as Exhibit A to Resolution No. 2024-103 of the Town of Marana, Arizona, is hereby referred to, adopted and made a part of this ordinance as if fully set out here. SECTION 2. Violation of the Town of Marana Drainage Manual shall be treated in the same manner as a violation of the Town of Marana Land Development Code, as set forth in Marana Town Code Chapter 17-3 "Administration and Enforcement." SECTION 3. The Marana Town Council hereby authorizes the Town Engineer to administratively update and revise the Town of Marana Drainage Manual from time to time as needed due to changes to the Marana Town Code and other Town standards or regulations, or when necessary based on sound engineering judgment consistent with accepted practices, as long as the administrative changes do not alter the general purpose or intent of the Drainage Manual. Ordinance No. 2024.025 -1- Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 141 of 395 SECTION 4. The various town officers and employees are authorized and directed to perform all acts necessary or desirable to give effect to this ordinance. SECTION 5. All ordinances, resolutions, or motions and parts of ordinances, resolutions, or motions of the Council in conflict with the provisions of this ordinance are hereby repealed, effective as of the effective date of this ordinance. SECTION 6. If any section, subsection, sentence, clause, phrase or portion of this ordinance is for any reason held to be invalid or unconstitutional by the decision of any court of competent jurisdiction, the decision shall not affect the validity of the remaining portions of this ordinance. SECTION 7. This ordinance is effective on the 31st day after its adoption. PASSED AND ADOPTED by the Mayor and Council of the Town of Marana, Arizona, this 19th day of November, 2024. Mayor Ed Honea ATTEST: APPROVED AS TO FORM: David L. Udall, Town Clerk Jane Fairall, Town Attorney Ordinance No. 2024.025 -2- Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 142 of 395 MARANA RESOLUTION NO. 2024-103 RELATING TO LAND DEVELOPMENT; DECLARING AS A PUBLIC RECORD FILED WITH THE TOWN CLERK THE TOWN OF MARANA DRAINAGE MANUAL ADOPTED BY ORDINANCE NO. 2024.025 BE IT RESOLVED BY THE MAYOR AND COUNCIL OF THE TOWN OF MARANA, ARIZONA, that the Town of Marana Drainage Manual adopted by Marana Ordinance No. 2024.025, a copy of which is attached to and incorporated in this resolution as Exhibit A and one paper copy and one electronic copy of which are on file in the office of the Town Clerk, are hereby declared to be a public record and ordered to remain on file with the Town Clerk. PASSED AND ADOPTED BY THE MAYOR AND COUNCIL OF THE TOWN OF MARANA, ARIZONA, this 19th day of November, 2024. Mayor Ed Honea ATTEST: APPROVED AS TO FORM: David L. Udall, Town Clerk Jane Fairall, Town Attorney Resolution No. 2024-103 1 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 143 of 395 • "Mon. •••... le !k, Exhibit A to Resktion No. 2024-103 MARANA AZ 4 -r4,41,71 ret. ',... • • - . tig: sictil 7.- ....• . ., -.-4.. -.... _ d• _ _ •••••!" . _.a. -._ --•••••••• • .._ _ ,41110.211111040ziprommi AN. .••••• - • -1, ` . , - ‘1, ...1 -,. -,,,,,,jr, Or.ir.--..--.• - -.-- -..4.----- t- . 1: IRKA.-_- ...:-.t.*Y-;4*• : -:-.......----- , t .-- 1 l-- _ . ....,.... • ••••• • /a._ Marna own • own Council Regular Meeting Agenda Packet November 19, 2024 - TABLE OF CONTENTS CHAPTER & SECTION MARANA AZ 1. Introduction and Purpose 4 1.1 Introduction 4 1.2 Purpose 4 1.3 Applicability 5 2. Documentation Requirements 5 2.1 Drainage Statement 5 2.2 Drainage Report 5 2.3 Master Drainage Report 5 2.3.1 Master Drainage Concept 6 2.4 Technical Data Support Notebook 6 2.5 Revisions 6 3. Regulatory Requirements 7 3.1 Floodplain and Erosion Hazard Management Code 7 3.2 Northwest Policy 7 3.2.1 Sheet Flow 7 3.2.2 Insufficient Receiving Waters 7 3.2.3 Ponding Restrictions 8 3.3 Excavations next to Flood Control Infrastructure 8 3.31 Upstream of Avra Valley Road 8 3.32 Downstream of Avra Valley Road 8 3.33 Additional Geotechnical Analysis 9 4. Hydrology 10 4.1 Tortolita Alluvial Fan Study (TAFS) Area 10 4.2 Areas outside of TAFS 11 4.3 Regulatory Discharges 11 4.4 Previously Approved Discharges 11 4.5 Accepted Software Programs 11 4.6 Hydrologic Parameters 11 2024 Town of Marana Drainage Manual 1 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 145 of 395 MARANA AZ 5. Hydraulics 12 5.1 Open Channel Design 12 5.2 Cross -Drainage 12 5.2.1 Culverts 13 5.2.2 Bridges 14 5.3 Storm Drain Design 14 5.3.1 Trunklines 14 5.3.2 Laterals 15 5.4 Pavement Drainage 15 5.5 Scour 16 5.6 Erosion Mitigation 16 5.6.1 Calculating Rip -rap Dso 17 5.6.2 Calculating the Rip -rap Gradation 17 5.7 Sedimentation 17 6. Detention/Retention 18 6.1 Design Standards for Stormwater Detention and Retention (2015) 18 6.1.1 Dry Well Design Requirements and Procedures 18 6.1.2 Infiltration Trenches 19 6.2 Town of Marana Exceptions to the DSSDR 19 6.3 Basin Depth and Perimeter Safety Requirements 20 6.3.1 Single Subdivision 20 6.3.2 Master -Planned Subdivisions (with regional detention/retention) and Commercial Developments 20 6.4 Critical Basin Map 20 6.5 In -lieu Fee Process 21 7. Dedication of Drainage Right of Way 21 8. Maintenance 21 9. Storm Water Requirements 21 10. References 22 11. Glossary 22 2024 Town of Marana Drainage Manual 2 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 146 of 395 MARANA AZ FIGURES 26 APPENDIX A A APPENDIX B B 2024 Town of Marana Drainage Manual 3 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 147 of 395 MARANA AZ 1. Introduction and Purpose 1.1 Introduction The Town of Marana (Town) has prepared this manual for the civil engineering and floodplain management community that is designing improvements within the Town limits. This shall apply to public and private improvements. Historically, the Town has relied on regional standards and methods in the hydrology/hydraulic discipline that mainly originated in the City of Tucson and Pima County. The Town prepared its own Subdivision Street Standards Manual for the first time in 2004 and has since updated that manual a total of two (2) times. This experience of having standards specific to the Town, compiled and referenced all in one location, has been very helpful to not only Town Staff but to the end users of the manuals: planners and engineers. The purpose of this manual is to compile the Town's policy by consolidating the historically used regional standards and methods but modifying standards to be more reflective of Marana's topography and culture. New methods and requirements for specific situations that are applicable within the Town Limits are also included. The standards in this manual are guidelines, which will be criteria for approval of submittals. However, it is recognized that there are situations for which these standards may not be applicable. In these cases, and in cases of conflict or contradiction, sound engineering judgment consistent with accepted practice shall be used and in some cases approval in writing by the Town Engineer will be necessary. Those portions of these standards prepared by the Pima County Regional Flood Control District (District) or the City of Tucson have been included herein as public domain information. It should be noted that this manual is adopting those standards from other agencies as they were at the time of publishing of this manual. Future changes to policy and methodology are not automatically incorporated into this manual. 1.2 Purpose The Town has grown substantially in area and population since first incorporating in 1977 and the growth has been subject to standards and policies through development processes that have been implemented and adapted as the town has grown. The Town is developing this drainage manual to manage the future growth of the Town with a single point of reference for drainage policy. This manual seeks to accomplish the following: • Compile drainage policies that currently exist in multiple references. • Establish policies that are appropriate to the Town's topography and culture. • Provide consistency for the development community, the public, and the Town. • Provide clarity to the development and engineering community of what to expect during the review and approval process. • A more consistent/efficient review and approval process. • A better final design that aims to keep the public safe from flooding for an established set of criteria that is achievable and cost-effective. • A design that acknowledges the maintenance costs of improvements and attempts to minimize undue maintenance for both publicly and privately owned infrastructure. 2024 Town of Marana Drainage Manual 4 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 148 of 395 MARANA AZ 1.3 Applicability These standards should be applied to development, both commercial and residential, and public works improvements when no such overriding standards, agreements and conditions apply. In the future, there could be overlapping of these standards with the Marana Town Code, Chapter 17-15 Floodplain and Erosion Hazard Management Code (Ordinance) and in those cases, the more restrictive of the two will take priority. 2. Documentation Requirements Drainage submittals supporting improvements and developments will need to meet minimum content standards in accordance with the size and complexity of the project. The types of drainage support documents and specific requirements are detailed in this section. 2.1 Drainage Statement A drainage statement is an appropriate supporting document when the project is five (5) acres or less and meets all of the following conditions: • Detention/Retention is not required. • No hydrologic or hydraulic modeling is required. Prior to pursuing or scoping a Drainage Statement as the supporting documentation for a project, consult with the Town to determine if this is acceptable. A Drainage Statement may be appropriate for developments covered by an approved Master Drainage Report under the condition that Detention/Retention was handled regionally and within the spine infrastructure of the development. There are other scenarios where a drainage statement may be appropriate when the density of development and subsequent drainage complexity does not require a report. See Appendix A for Drainage Statement Format. 2.2 Drainage Report A drainage report is an appropriate supporting document for public infrastructure projects that may affect drainage and those private development projects that exceed the thresholds for a drainage statement. Drainage reports are appropriate for the following: • Subdivisions with single family residential land -use. • Commercial, Industrial and Institutional Developments that are single owner — non -phased improvements. • Public infrastructure projects. • Private utility projects. See Appendix A for Drainage Report Format. 2.3 Master Drainage Report A master drainage report (MDR) is an appropriate supporting document for master planned developments, phased developments, and any platted subdivisions (residential or commercial) with Blocks that are created for future development. The MDR is approved in perpetuity by virtue of the development review process. MDRs may become obsolete, non -conforming, or not in -step with the owner's/Town's vision for the area. At such time the MDR must be revised and entitled the "Revised" MDR and make reference to former MDR approval. Reasons for revising the MDR include, but are not limited to the following: • Change in federal flood hazard zone designation • Change in land -use of the property 2024 Town of Marana Drainage Manual 5 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 149 of 395 MARANA AZ • Change in hydrology methodology (runoff method, rainfall, etc.) • Change in drainage concept 2.3.1 Master Drainage Concept The master drainage concept (MDC) must address the spine infrastructure drainage, regional detention, and block to block drainage concept. This drainage concept addresses the potential runoff of the entire block and its ultimate destination in the MDC. Blocks that do not drain into spine infrastructure must establish flow types, amounts across block boundaries. Flow types across block boundaries can be divided into three (3) categories: • Sheet flow — downstream block must account for future sheet flow from upstream developed block • Dispersed flow — downstream block must account for at least 2 or more locations of flow from the upstream block • Concentrated flow — downstream block need only account for one concentrated inflow from the upstream block Blocks that develop first shall establish the location of flow acceptance and discharge and post - developed blocks shall adhere and accept those locations. The concept of individual block detention/retention over regional detention must be approved in writing by the Town Engineer. See Appendix A for Master Drainage Report Format 2.4 Technical Data Support Notebook The Technical Data Support Notebook (SDTSDN) is a nationally accepted report format for documenting large scale hydrologic and hydraulic analyses with the intent to establish flood risk inundation. This format is required for supporting a Conditional Letter of Map Revision (CLOMR) and Letter of Map Revision (LOMR). A regionally accepted format for the DDTSDN has been published by Arizona Department of Water Resources as State Standard SS1. Attention should be given to projects that overlap municipal boundaries that multiple community concurrence forms may be required. See MT-2 form instructions. 2.5 Revisions Revisions are for the purpose of revising or adding to approved reports. A report that is not yet approved by the town cannot have a revision or addendum to it. Revisions or refinements to a drainage concept may need to be documented in a re -submittal during the development review process. The decision matrix for submitting a revision (Revised Drainage Report) versus an addendum is laid out in the flow chart below: Did the drainage I No concept change? Ycs 2024 Town of Marana Did peak discharges change? Ycs Submit a Revised DR No Are lot lines changing? Yes No Are changes limited to field changes or structure sizes? Drainage Manual 6 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 150 of 395 MARANA AZ 3. Regulatory Requirements 3.1 Floodplain and Erosion Hazard Management Code Chapter 17-15 of Marana Town Code is entitled Floodplain and Erosion Hazard Management Code and was approved by Ordinance 2015.021. This section of the Town Code shall hereafter in this document be referred to as the "Ordinance." In the future, there could be overlapping of these standards with the Ordinance and in those cases, the more restrictive of the two will take priority. 3.2 Northwest Policy The Northwest Policy is hereby incorporated into the Drainage Manual and will now be the home for future modifications and updates. The Northwest Policy was first introduced in December of 2000 for the purpose of addressing the development of the area of the Town Limits which are largely devoid of drainage conveyance mechanisms either natural or improved. The boundary in which the Northwest Policy shall be administered is shown on Figure 1, NW Policy Area Map. Accordingly, the Town adopted the following requirements for this region: 3.2.1 Sheet Flow Any offsite sheet flow intercepted by a project shall be passed through the project, onsite, or shall be accommodated via an approved alternative facility. Simply elevating a project out of a sheet -flow area without regard to the displaced floodwaters will not suffice. The Town may require flow corridors to be dedicated to provide conveyance of offsite flow in sheet flow areas. 3.2.2 Insufficient Receiving Waters Projects lacking sufficient improved or natural receiving waters into which stormwater runoff may be discharged shall be required to retain 100% of all on -site runoff volume generated during the design storm. The design storm shall be a 100-year, 1-hr storm, followed by a 10-year, 1-hr storm. These storms shall be applied assuming a lag of 24 hours between (This is important for calculating drain time). Drain time must be 36 hours or less and the clock begins at the end of the 10-year storm. The volume of runoff to be retained shall be computed using the applicable equation excerpted below. An emergency overflow weir, which may discharge to an existing public street, shall be provided as an element of any onsite retention facility. Equation 3.1 Vpost-rp 12 Cw-rp Pi-rp A Where: A = Watershed area Cw_rp = Weighted runoff coefficient for the return period, dimensionless Pi-rp = 1-hour rainfall depth for the return period, inches Vpost-rp = Runoff volume for the return period, acre feet 2024 Town of Marana Drainage Manual 7 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 151 of 395 MARANA AZ 3.2.3 Ponding Restrictions Ponded water in basins shall be in conformance with Section 6.3 of this manual, "Basin Depth and Perimeter Safety Requirements." Drywells are the most common disposal method used to meet drain time requirements. Drywell and Infiltration Trench requirements are discussed in Sections 6.1.1 and 6.1.2 respectively. 3.3 Excavations next to Flood Control Infrastructure Recognizing the inherent hazard of potentially unstable slopes from deep excavations upon public infrastructure due to failure mechanisms such as seepage, rilling, and headcutting, the Town has generated a standard for safe setback to public infrastructure and neighboring property for all new sand and gravel operations that are permitted within the town limits. Without additional geotechnical analysis supporting stability of excavations, the following setbacks from property lines shall be adhered to under the following conditions: 3.31 Upstream of Avra Valley Road 1. Maximum excavation slope shall be 1:1 2. Top of slope (as first permitted) shall be setback: a. No closer than 100 feet for 25-50-foot depth excavation b. No closer than 200 feet for 50-100-foot depth excavation 3. Excavations deeper than 75 feet shall first install piezometers in the area between effluent flow and excavation to evaluate presence of lateral groundwater flow. A slope failure analysis due to saturation will be required at time of submittal. 4. Final reclaimed slopes shall be no steeper than 3:1 3.32 Downstream of Avra Valley Road 1. Maximum excavation slope shall be 1:1 2. Top of slope (as first permitted) shall be setback: a. No closer than 150 feet for 25-75-foot depth excavation b. No closer than 300 feet for 75-150-foot depth excavation 3. Excavations deeper than 125 feet shall first install piezometers in the area between effluent flow and excavation to evaluate presence of lateral groundwater flow. A slope failure analysis due to saturation will be required at time of submittal. 4. Final reclaimed slopes shall be no steeper than 3:1 2024 Town of Marana Drainage Manual 8 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 152 of 395 MARANA AZ 3.33 Additional Geotechnical Analysis Minimum setback to property line/public infrastructure shall be 100-feet when supported by additional geotechnical analysis, including: • Appropriate characterization of soils on slope and in between property line/public infrastructure to a depth greater than ultimate excavation depth • When setbacks are proposed which do not provide for sufficient distance to achieve a reclaimed 3:1 slope, a statement that slopes are stable and will not create a hazard to adjacent personal property or public infrastructure must be made under the seal of a registered professional engineer in the State of Arizona. • A slope failure analysis will be required for any setbacks proposed that are less than standard minimums published above. Additional restrictions on excavations outlined in the Ordinance shall remain and be full in force. 2024 Town of Marana Drainage Manual 9 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 153 of 395 MARANA AZ 4. Hydrology The Town uses a combination of rainfall runoff methodology to quantify peak discharges within the town limits that depends on purpose of the discharge quantity, the location of the project and the size of the watershed. One distinction in terms of location within Town Limits is the Tortolita Fan which comprises a good portion of the Marana Town Limits. Because the Tortolita Fan area is unique geomorphologically and is subject to unconsolidated sheet flow, distributary flow, and active alluvial channel formation, the method for rainfall runoff requires a rain on grid analysis using finite difference methodology. The remainder of the Town Limits should utilize the Pima County Hydrology Methodology. Both methodologies are discussed in detail below. 4.1 Tortolita Alluvial Fan Study (TAFS) Area Figure 2, TAFS Area is provided to show the region that is covered by the Town's TAFS model. The TAFS model uses two software programs: HEC-1 and FLO-2D. This modeling effort was approved by FEMA for flood hazard mapping use. The study area has two model scenarios to address rainfall aerial reduction: Regional and Non -regional. Refer to References to download the models. Regional: Rainfall aerial reduction factor was based on the watershed size of the entire TAFS area (±165 square miles). The regional model was approved by FEMA for floodplain mapping in the TAFS area. Non -regional: Rainfall aerial reduction factors were based on the watershed size of each major watershed (total 10 major watersheds, with varying watershed size in the range of 7.8 — 24.8 square miles (measured by extending major watersheds to Interstate 10). The non -regional model is intended to be used by the Town for development projects The size of the TAFS area necessitates aerial reduction for accurate flood risk; without aerial reduction the regional discharges would be exaggerated. However, a scenario was executed and entitled "non -regional" which applies aerial reduction at the sub -basin level instead of at the watershed scale. This non -regional scenario was approved for determining design discharges for areas within the fan. When preparing a Letter of Map Change (LOMC) through FEMA to address changes to flood boundaries within the TAFS area, the revision should utilize hydrology from the regional model. When preparing a development submittal (commercial or residential) and the purpose is to support the plats, development plans and improvement plans for drainage design and accommodation of offsite flows, the Drainage Report should utilize non -regional hydrologic results for offsite hydrology. Non -regional results can come from a non -regional FLO-2D run. The consultant needs to use sound engineering judgement in selecting the offsite hydrology method. Pima County methodology, specifically use of PC -Hydro software, is very conservative and is an accepted method for design hydrology on the fan (See Section 4.2). Exceptions within the TAFS Area: • Onsite hydrology within TAFS shall be prepared using PC -Hydro software and methodology. • Regional FLO-2D model results are not permitted for design discharges. • Locations on the fan where the FLO-2D does not show flow accumulation and clearly has contributing watershed upstream of planned development must be accounted for with a PC -Hydro runoff calculation. Regional FLO-2D model results shall only be used for FEMA purposes. Design discharges shall be either the Non -regional FLO-2D model value or other design discharge specified by the Town. Both regional and non -regional FLO-2D models will be provided by the Town with a public information request. 2024 Town of Marana Drainage Manual 10 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 154 of 395 MARANA AZ 4.2 Areas outside of TAFS Projects located outside of the TAFS boundary should use Pima County Hydrology Methodology as published in TECH-015. One exception to TECH-015 is that Marana will accept use of PC -Hydro on watersheds up to 10 square miles or times of concentration up to 180 minutes for design purposes only. Rainfall shall use NOAA Atlas 14 (or latest published Atlas) mean point precipitation frequency estimates. If PC -Hydro is used it defaults to Upper 90% point precipitation estimates. The Town will accept manual input of the mean rainfall estimate into the PC -Hydro web application under the following conditions: • The report shall clearly state that the decision was made to use mean rainfall values. • The plotted PC -Hydro results sheets shall be clearly marked that they were conducted with mean rainfall data and not Upper 90%. • A plot of NOAA Atlas 14 rainfall depths showing mean rainfall depths shall be provided. FEMA remapping projects outside of TAFS should use a rainfall runoff method acceptable to FEMA that is as accurate as possible and verified to published frequency estimates and/or within the confidence intervals of regional regression estimates. 4.3 Regulatory Discharges The Town has published regulatory and design discharges for certain watercourses. The discharges can be found in the Ordinance Section 17-15-11 Appendix 1. 4.4 Previously Approved Discharges In addition to Section 4.3 published discharges, the town has authority to direct the use of other design discharges that may have been approved with other projects. Consult with the Town about other discharges that may be affecting the project in question. 4.5 Accepted Software Programs The Town will accept the following software programs for hydrology in accordance with Section 4.2: • FLO-2D Pro versions. In the TAFS area, only FLO-2D Pro [Build No. 17.08.17] will be allowed due to other FLO-2D Pro versions having issues with the combined Green-Ampt and SCS curve number method, which was utilized in the TAFS models. • PC -Hydro 7.4 • HEC-1 allowed for generational projects that have been prepared using HEC-1. • HEC-HMS for new projects 4.6 Hydrologic Parameters For projects that use Pima County Hydrology Methodology, parameter selection is defined in the PC - Hydro 7.4 Users Manual embedded in the web application. Soils are not populated automatically, so when choosing soil coverage use PimaMaps-SDCP. Toggle on the Geology Layer and then the Hydrologic Soils Group — NRCS layer. For projects that use FLO-2D user shall utilize: • TAFS modeling parameters for projects located in the TAFS area. • Outside the TAFS area, Pima County's Criteria for Two -Dimensional Modeling Technical Policy (TECH-033) shall be used. 2024 Town of Marana Drainage Manual 11 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 155 of 395 MARANA AZ 5. Hydraulics Hydraulic methodology originates from multiple sources that have been accepted by the Town. The most robust source on hydraulics is the Standards Manual for Drainage Design and Floodplain Management in Tucson, Arizona (City Manual) (1998) prepared by Simon, Li and Associates, Inc. for the City of Tucson. The City Manual is widely accepted in Southern Arizona and adjacent jurisdictions for drainage design methodology. The following sections make any clarifications or specific departures from the City Manual standards. 5.1 Open Channel Design It is the preference of the Town to preserve existing natural channels with a natural bottom. If the channel bottom cannot be maintained as natural, then a justification must be provided within the report. Open Channel design methodology is discussed in Chapter 8 of the City Manual (See Appendix B). What follows are some clarifications and/or supplemental information to those standards: • Sheet flow areas, specifically in the Northwest Area, may require some corridors for offsite generated drainage conveyance. Do not assume that upstream development will retain pass - through flow. • Sheet flow in areas upstream of residential developments or habitable structures shall be collected following the Collector Channels standards in Chapter 8 of the City Manual. Sheet flow in areas upstream of other projects such as linear roadways may be collected in collector channels designed per alternative capacity and freeboard criteria as approved on a project -specific basis by the Town Engineer. Collector channels should be fully -lined with a material that is resistant to erosion and provides a means to remove sediment to restore constructed grades. • Constructed channel slopes in the Northwest Marana area (only) may be as flat as 0.0015 ft/ft • When a project runs adjacent to one of the future Marana Drainage Master Plan channel alignments on Barnett Rd, Marana Rd, or CMID 10.5 canal the Town may require construction or dedication of right-of-way for the future channel. • CMID Canals shall not be considered as providing flood conveyance capacity. • Open Channels shall be designed with non -regional discharges. Acceptable methods for calculating water surface elevations/capacity of channels includes normal depth calculations for those channels/watercourses that do not have the presence of structures/ineffective flow areas that would create backwater. If the watercourse is regulatory (>50 cfs) and has culvert crossings, then it needs to be evaluated with a steady flow direct step backwater model that also has internal drainage structure calculations rather than simple normal depth calculations. Acceptable software includes Federal Highway's Hydraulic Toolbox and other proprietary software for calculating normal depth. For backwater applications, it is recommended to use the latest available version of HEC-RAS. 5.2 Cross -Drainage The goal of cross -drainage design will be to achieve all-weather access. On -site roadways shall be designed to convey the 100-year discharge under the roadway. Off -site public roadways will continue to be a challenge until the Town's Master Drainage Plan is implemented. Because of sheet -flow from the TAFS area and large expanses of the Town limits inundated by the Santa Cruz River, there will need to be exceptions until regional flood control improvements go in. As a matter of interpretation and consistency with other adjacent jurisdictions, a development provides all-weather access when it connects to an 2024 Town of Marana Drainage Manual 12 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 156 of 395 MARANA AZ existing public collector or arterial roadway despite whether the Town or County maintained collector roadway provides all-weather access along its entire length. An on -site all-weather at -grade crossing may be considered if it can be demonstrated that a dry -crossing is not feasible, that it conforms to Section 9.3 of the Marana Streets and Subdivision Standards and that is has attained prior approval by the Town before it is included in a development package. 5.2.1 Culverts Culvert analysis shall follow FHWA's Hydraulic Design Series (HDS) No. 5 (2012). Software based on HDS No. 5 methodology is acceptable for calculating hydraulic results. Culvert headwater shall be designed to be a minimum of six inches below the hinge point of roadway for newly designed on -site roadways. 4i+ 12' TWO WAY LEFT TURN LANE 75' 11' TRAVEL LANE 2j CLEAR ZONE R/W Y i 5 SHLO VARIES 4' Hinge Point NNW Figure 1- Partial Roadway Cross Section Off -site public roadway improvements cross -drainage design criteria shall be determined by the Town on a case -by -case basis. Inlet and outlet treatment for culverts shall be required and be appropriate for the design of the road. Pipe ends projecting from slope are acceptable in local rural road applications only. Mitered culvert ends are acceptable only on slopes 2:1 and steeper; surrounding slopes must be armored with erosion protection. Additional provisions for inlet and outlet treatment may be required based on Roadside Design Guide (AASHTO). Barricade railing shall be provided at the top of culvert headwalls when distance between established walkway and back of headwall is less than 5-feet. Drop inlets used to accommodate cover over a cross -culvert must be evaluated in both inlet control and weir control and use the highest calculated headwater. Drop inlets must also provide a minimum of 7-feet from the face of the culvert to the toe of the drop slope to accommodate maintenance equipment. One side of the drop inlet shall be traversable to a piece of tracked equipment. Traversable is defined as a 3:1 slope that can support the weight of a 950G loader or equivalent. 2024 Town of Marana Drainage Manual 13 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 157 of 395 MARANA AZ 5.2.2 Bridges Bridges shall be analyzed using a direct step backwater model in a sub -critical regime with the goal to get the most conservative water surface elevation (WSEL) on the upstream side of the bridge face in a 1- dimensional environment. Refer to HEC-RAS Hydraulic Reference Manual Section 7.1 for bridge modeling considerations. Freeboard at bridges shall conform to the guidance in Guidelines for Establishing Scour and Freeboard for Bridges in Pima County (2012). Bridge Scour is addressed in Section 5.5. If the bridge falls in a 2- Dimensional flow environment, it is recommended to schedule a meeting with the Town to discuss the design approach. There could be occasions where a low -flow bridge is acceptable, and those occasions will be reviewed on a case -by -case basis. 5.3 Storm Drain Design This section is included for describing policy and methodology of hydraulics in storm drain trunklines and laterals. Inlet design capacity will be discussed in Section 5.4, Pavement Drainage. Hydraulic grade line (HGL) calculations should be performed on the trunkline and associated junctions and manholes along the trunkline beginning at the downstream terminus and calculating in the upstream direction. See City Manual Section 10.8 for instructions on HGL calculations. StormCAD and other proprietary software may be appropriate for performing these calculations. 5.3.1 Trunklines 5.3.1.1 Private Systems Storm drain systems on developed sites that are not in public right-of-way will be maintained by the owner or property owners association. Sites that have a sediment yield shall follow design criteria for public systems. Sites that are determined to be clear -water conditions may follow the guidelines below: • Minimum trunkline slope may be 0.1 % for smooth interior pipes. • Pipe materials other than reinforced concrete pipe may be used provided the manufacturers recommendations for cover are followed and documented in the drainage report. • Pipe segments may match at the invert although preference would be to match soffits. • Pipe diameter or aggregate cross -sectional flow area must increase in the downstream direction. • Design event can be less than 100-year event if it is demonstrated that the combination of surface and sub -surface flow for the 100-year event is conveyed safely to downstream destination and adjacent habitable structures are elevated appropriately. • If pipe system is used for supplemental storage volume, then pipes must be designed to be water tight. Furthermore, pipes must also meet basin drain time requirements. 5.3.1.2 Public Systems Storm drain systems within public right-of-way are maintained by the Town and therefore must meet the following requirements: • Pipe material shall be rubber gasket reinforced concrete pipe (RGRCP). • Minimum trunkline slope may be 0.25% if velocity conditions are met. • Velocity in pipe shall not be less than 3 fps. • Velocity in trunkline must be maintained or increased in the downstream direction. Decreased velocity will subject the pipe to deposition of sediment. • Minimum pipe diameter is 24-inches for smooth interior pipes. • Pipes segments shall match at the inside top of pipe in the downstream direction. • HGL shall be designed to stay below finished grade and 6-inches below inlets and manholes. 2024 Town of Marana Drainage Manual 14 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 158 of 395 MARANA AZ The Town Engineer may allow manhole rims to be bolted down in rare cases when the 6-inch separation cannot be achieved. • Trunklines shall be designed for the 100-year event. 5.3.2 Laterals The following requirements shall apply to laterals of both public and private systems: • Laterals slope may not exceed 10% and should not be less than 0.5% • Laterals shall connect to trunkline at no greater than 90-degrees. • Laterals on public systems shall not be smaller than 18-inches. • HGL at upstream terminus of lateral shall be at least 6-inches below gutter grade or grate elevation for the 100-year event. • Cover over pipe shall be in accordance with manufacturer's recommendations. 5.4 Pavement Drainage Subdivision and Commercial Developments shall follow the guidelines in Section 9.0 of the Subdivision Streets Standards. Additional stipulations have been added below: • Parking may be proposed with ponding areas (including within flood hazard zones) provided that the flooding depth does not exceed 1-foot during the 100-year event. • Parking areas subject to flooding from a regulatory watercourse must be signed to warn vehicle owners of such risk. • Arterial Streets and multi-laned curbed roadways shall provide at least one dry lane (10-feet) in each direction during a 10-year storm event. • Cross -slopes may flatten to zero on local roads to accommodate transverse grates which extend from curb to curb. Cross -slopes must immediately transition back to the design cross-slope(s) in accordance with AASHTO guidance on transition lengths on either side of the transverse grate. • Curbs may transition from 4-inch roll/5-inch wedge curb to 6-inch vertical for curb inlets and scuppers. Transition must happen abruptly and not impact driveway access. • Maximum depth in roadway shall be 1-foot at any point, provided it is contained in the right-of- way or is discharged through a controlled structure into a facility with capacity to receive the peak flow. Depth shall be measured at the gutter/base of curb going upward irrespective of inlet depression. • Inlet capacity calculations should follow procedures in the City Manual Section 10.6. • Inlet clogging factors can be found in the City Manual Section 10.6.9. • When sidewalk is present, a curb inlet shall be provided to take the 10-year flow under the sidewalk. • Overtopping of sidewalks during the 100-year may be allowed provided that the entire length of susceptible overtopping area is protected from erosion. • Depressed curb, where no sidewalk is provided, may be longer than 10-feet provided post barricades are provided at 5-foot (center to center) but in no case shall be longer than 20-feet. With the prevalence of transverse grate inlets that extend across the entire road, the City Manual may be appropriate for inlet capacity calculations; however, when curved vane grates are utilized it is recommended to use the capacity calculations within the FHWA's Hydraulic Toolbox, which is a publicly available software. Other proprietary inlet performance charts may be accepted on a case -by -case basis by the Town. Offsite public roadways pavement drainage design shall follow guidelines in the 4th Edition of the Pima County Roadway Design Manual (2013). 2024 Town of Marana Drainage Manual 15 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 159 of 395 MARANA AZ It is the position of the Town that discharge from the street via scuppers to the surface is more desirable than the addition of storm -drain to the Town's infrastructure inventory. Use of public storm drain must be accompanied with a demonstration that it is the best alternative for conveyance of stormwater. 5.5 Scour There are three scenarios that need scour analysis: 1) Bridge Design; 2) Outfall Scour; and 3) Riverine Scour. Bridge design shall follow the Guidelines for Establishing Scour and Freeboard for Bridges in Pima County (2012). The latter two scenarios should follow methodology in the City Manual, Chapter 6. When determining a design scour depth on the Santa Cruz River an additional 5-feet shall be added to the design toe -down to account for continuous presence of effluent and the entrenching created by the long-term presence of clear water. A headcut on the Santa Cruz River continues to migrate towards Marana from Pinal County. For future regional flood control improvements or new bridges over the Santa Cruz River, the propagation of the headcut upstream should be considered in design of features with design life greater than 25-years. 5.6 Erosion Mitigation For practical purposes most natural undisturbed washes can be considered to be at equilibrium. Once washes are modified or graded, they are susceptible to changes in equilibrium and must be treated as unstable. Grade control shall be provided on earthen channels/bottoms that have design slopes steeper than the equilibrium slope. See Section 6.9 of the City Manual for the procedure on channel grade control. Erosion potential is also required to be evaluated and mitigated at outlets of drainage structures. There is guidance in Section VI, Drainage and Channel Design Standards for Local Drainage (1984) for scour protection at culvert outlets. Sheet flow areas are not typically environments for erosion; however, newly placed fill and earthen embankment are usually susceptible to erosion even during sheet flooding. To mitigate erosion of fill pads, follow the guidance in Pima County Technical Policy, TECH-006 Erosion Protection of Fill Pads in Regulatory Floodplains. The test for susceptibility to erosion on a fluvial watercourse is to determine what the lateral migration limits are. Erosion Hazard Setbacks (EHS) are calculated for potential migration areas and any improvements within those limits are susceptible. The Ordinance restricts uses within the EHS and if a project needs to mitigate the erosion hazard to reclaim the use of that property, erosion mitigation in the form of bank protection should be installed to eliminate the potential of lateral migration. Bank protection design should follow the guidance in Section 8.5 of the City Manual. Rock rip -rap is one alternative for bank protection. The effectiveness of dumped rock rip -rap is dependent upon a satisfactory gradation that allows the rock to be laid without significant voids. Voids in rip -rap layers due to homogenous sized rock can induce undermining, sloughing and failure as fine sediments are washed out from behind the layer because of too much porosity. There are two steps to appropriately size rip -rap for use as bank protection: 1) Calculate the D50 (the rock diameter that at which 50% passes in a sieve analysis); 2) Calculate the gradation of rip -rap. 2024 Town of Marana Drainage Manual 16 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 160 of 395 5.6.1 Calculating Rip -rap Dso The rip -rap d5o can be calculated using the Isbash equation for a straight reach of channel. The equation (as adapted from Maricopa County) is as follows: d50 = With: C7 0.0191V4 Yw cosy) \ss — y d5o = the median diameter (ft), V. = average velocity (ft/s) yS = specific weight of stone (lb/ft3) = assumed 165 lb/ft3 yW = specific weight of water (lb/ft3) = 62.4 lb/ft3 cp = bank angle (degrees), see figure above MARANA AZ Minimum D50 in all applications is 6-inches. Rip -rap sizing methodology other than the Ishbash equation may be proposed within the drainage report. Refer to the Maricopa County manual for rip - rap sizing guidance in situations where curved reaches are present. 5.6.2 Calculating the Rip -rap Gradation Rip -rap gradation limits should be specified in drainage reports and on construction documents where rip - rap is to be installed. Limits are meant to be for visual inspection of a mock-up prior to installation of rip - rap. The three-point gradation (adapted from HEC-11) below should be satisfactory in most applications for bank protection: Stone Size Range (ft) Stone Weight Range (lb) Percent of Gradation Smaller Than 1.5 D50 to 1.7 D50 3.0 W50 to 5.0 W50 100 1.0 D50 to 1.15 D50 1.0 W50 to 1.5 W50 50 0.4 D50 to 0.6 D50 0.1 W50 to 0.2 W50 15 5.7 Sedimentation The Town's concern with sedimentation exists where infrastructure can get plugged with sediment due to abrupt changes in sediment carrying capacity. The areas where this is most likely to happen is at cross - drainage structures of public roadways and storm drain systems. To prevent this, cross -drainage culverts should be designed to transport the sediment delivered to them. The City Manual Section 11.5 has a metric which gives indication of a sedimentation problem, referred to as the Sediment -transport ratio. The ratio compares sediment transport in the approach channel to the sediment transport capacity of the culvert. It is not desirable to collect off -site, sediment laden flow into a closed storm -drain system. Storm drain systems should be limited to collect clear water from developed areas that do not have a sediment yield. In the event a closed system must convey flow from a watershed with sediment yield, a sediment trap should be sized and installed at the inlet. 2024 Town of Marana Drainage Manual 17 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 161 of 395 MARANA AZ Section 5.3.1.2 of this manual provides criteria for storm -drains to ensure they don't create an environment for deposition. 6. Detention/Retention 6.1 Design Standards for Stormwater Detention and Retention (2015) The Town has adopted the Design Standards for Stormwater Detention and Retention (2015) (DSSDR). The standards and procedures within shall apply to those areas outside of the Northwest Policy Area. See Figure 1. Areas within the Northwest Policy Area should reference Section 3.2 of this manual. 6.1.1 Dry Well Design Requirements and Procedures The Northwest Drainage policy requires the total retention of the 100 year, 1-hour storm followed by a 10 year, 1-hour storm. Although the policy does not specify, there is an expected lag of 24 hours between the storms. The retention basins associated with this storage are required to drain within 36 hours after the end of the 10-year storm. Drywells are the most common method of draining these basins. The calculations of basin size needs and well -injection rates must conform to these requirements. More conservative designs are encouraged. These requirements are based upon the DSSDR, the Northwest Policy, Arizona Department of Environmental Quality Drywell Guidance Manual (ADEQ), and empirical experience from existing projects in Northwest Marana: 1. The maximum drywell well -injection rate to be used for design is nominally 0.5 cubic feet per second (cfs). With specific geotechnical recommendations, the well -injection rate may be increased up to 0.6 cfs. The well -injection rate must be multiplied by a 0.5 de -rating factor for determining the number of drywells needed. 2. The basin must at a minimum totally contain the 100-year, 1 hour storm. Since these basins rely on infiltration as their means of draining, no outflow rate may be considered during the volume design of the basin. 3. Prior to introduction of the 10-year, 1 hour storm, the Town of Marana allows a credit to reduce the amount of stored volume in the basin from the original 100-year storm. This credit is half the aged drywell drain rate over the 24-hour lag period. Ex: 0.25 cfs/well * 0.5 * 3600 sec/hr* 24 hours/ 43560 = 0.25 acre-ft/well 4. After drywell credit is applied, the 10-year, 1 hour storm volume is added to the basin. The basin must contain this new volume plus the prior volume less the credit. This final basin volume cannot be lower than the volume calculated in number 2 above (total containment of the 100-year, 1 hour storm). 100 yr — credit + 10 year > 100 year for volume requirement 2024 Town of Marana Drainage Manual 18 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 162 of 395 MARANA AZ 5. The de -rated well -injection rate, while not allowed to be considered for volume requirements, can be used immediately in the calculations for determining if the basin will drain in 36 hours after the final ten-year storm. 6. Other key factors to be considered for basin design: a. Ponding depth maximum is 3.0 feet (Section 6.3) b. Backwater is allowed into drainage channels and parking areas but not onto streets. c. Basin floors may not be designed totally flat. They must be designed with positive drainage to the drywells — 0.5% minimum d. Multiple Drywells should be spaced a minimum of 100 feet apart from center to center. (ADEQ) e. Drywell grates should be 24-inch cast iron with raised letters "STORMWATER ONLY". (ADEQ) f. Drywell grates should be a minimum of 6 inches above the bottom of landscaped retention basins (ADEQ). 7. During construction, a minimum of 1 well per basin must be tested for verification of flow rate at or above the original design. If the wells do not flow as designed, redesign is necessary, and more wells may be needed. 8. Drywells must be protected from silt infiltration during construction. Any and every drywell known to have been compromised during construction will have to be cleaned and tested prior to closeout of permitting. 9. Drywells must be registered with ADEQ prior to closeout of permitting. 6.1.2 Infiltration Trenches Alternative methods for disposing of stormwater into the subsurface will be evaluated on a case -by - case basis. Drain time requirements will continue to drive the viability of subsurface disposal and a separate study prepared by a registered geotechnical engineer or hydrogeologist must accompany the construction plans and include at a minimum: • Design percolation rate of stormwater into subsurface • Native percolation rates of soils beneath the alternative structure • Potential for fine sediments to clog the porous material. • Annual inspection checklist • Means to maintain the alternative structure. • Certified statement by a registered professional engineer in the State of Arizona that the structure complies with ADEQ regulations. 6.2 Town of Marana Exceptions to the DSSDR • Redevelopment of a property shall assume an existing impervious percentage equivalent to its last use prior to demolition of the site. • First Flush Retention is not required in the Northwest Policy Area. • The Town has issued its own Balanced and Critical Basin Map (Section 6.4) and will update that from time to time. All updates to that map will be automatically incorporated into the drainage manual. • The minimum freeboard on detention basins (between maximum water surface and top of impoundment) in all cases will be 6-inches. This freeboard shall apply to Northwest Policy area as well. 2024 Town of Marana Drainage Manual 19 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 163 of 395 MARANA AZ 6.3 Basin Depth and Perimeter Safety Requirements Recognizing that ponded water under the right conditions can be a hazard and an environment for insect breeding, to deter the public and protect the pedestrian from potential hazards associated with ponded water, precautions should be taken when certain physical criteria are met. Specific safety requirements are dependent upon land use and the size of development as follows: 6.3.1 Single Subdivision 1. Maximum ponding depth of 3 feet. 2. Barricade railing must be provided when both of the following occur: a. Ponding depth exceeds 2 feet b. Side slope is steeper than 4:1 (H:V) 3. If a minimum of 5 feet of refuge does not exist between the top of slope and back of pedestrian way and condition 2(b) is exceeded, then barricade railing must be provided. 4. Railing, at least 42 inches high, must extend along all portions of the basin accessible to pedestrians via a constructed walkway, the railing should terminate in a manner that protects the public from the hazard. 6.3.2 Master -Planned Subdivisions (with regional detention/retention) and Commercial Developments 1. In no case will ponding exceed 6 feet, unless approved by the Town Engineer (3 feet when a full retention system is employed). 2. Barricade railing must be provided when both of the following occur: a. Ponding depth exceeds 2 feet b. Side slope is steeper than 4:1 (H:V) 3. If a minimum of 5 feet of refuge does not exist between top of slope and back of pedestrian way, then barricade railing must be provided. 4. Railing, at least 42 inches high, must extend along all portions of the basin accessible to pedestrians via a constructed walkway, the railing should terminate in a manner that protects the public from the hazard. a. For commercial applications the railing should be provided along the basin edges that have the potential for employee foot traffic if the 5 feet refuge is not provided. 5. When ponding depth exceeds 3 feet and the side slope is steeper than 4:1, the entire basin perimeter must be secured with non -penetrable fencing. This standard applies to all areas of the Town of Marana. Master -planned subdivisions that do not provide regional detention must follow the Single Subdivision requirements. 6.4 Critical Basin Map All watersheds within the Town Boundary are designated Balanced Basins unless it has been determined to be a Critical Basin. See Figure 3, Balanced and Critical Basins Map. Future revisions to the Balanced and Critical Basins Map will be automatically incorporated into the Drainage Manual. 2024 Town of Marana Drainage Manual 20 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 164 of 395 MARANA AZ 6.5 In -lieu Fee Process Any request to waive the detention requirements shall come in writing in the form of a waiver request letter to the Town Engineer. The process for requesting a waiver should follow the guidance in Section 9 of the DSSDR. Upon approval of the waiver request, an in -lieu fee calculation sheet will be provided to the applicant. The in -lieu fee calculation will require the following: • Total required peak detention volume to meet the appropriate balanced or critical designation. • Total required first flush retention volume. • The area of land required with volume distributed over 3-feet in depth. • A sample In -lieu calculation can be downloaded here. 7. Dedication of Drainage Right of Way Constructed channels that are dedicated to the public must be labeled as public drainageway on a subdivision plat or via separate instrument. Minimum 16-foot maintenance access shall be provided on each side of the channel. Projects adjacent to regional watercourses shall dedicate 50-feet measured from the front of bank protection. Consult the Town prior to proposing dedication to the public. 8. Maintenance Improved Channels with side slopes steeper than 6:1 must be equipped with maintenance ramps for both private common areas and public rights of way. Access for maintenance on fully lined channels shall be designed to support the loads of the following equipment: • 10 CY dump truck • 950G Loader or equivalent Ramps shall be a minimum of 10 feet wide and fall in the downstream direction. Ramps shall be cut-out of the bank to prevent loss of conveyance. When roadways bisect the channels and the culverts structures are not big enough for access, ramps shall be designed on the downstream side of each crossing. Detention Basins must be inspected on an annual basis. A maintenance checklist shall be submitted within the Drainage Report. A sample channel/basin maintenance plan is provided in Appendix A 9. Storm Water Requirements Storm water regulations exist for the purpose of monitoring water quality and are governed by the Arizona Department of Water Quality under the Arizona Pollution Discharge Elimination System (AZPDES) program. Marana is a Small MS4 General Permit area and must comply with requirements of the AZPDES program. Requirements to comply with the Town of Marana Stormwater division are separate and unique and can be found in the Marana Town Code Chapter 17-16, Stormwater Management. 2024 Town of Marana Drainage Manual 21 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 165 of 395 MARANA AZ 10. References TAFS model (Click to access Models) Town of Marana. Subdivision Street Standards Manual. 2020 Town of Marana. Chapter 17-15 Floodplain and Erosion Hazard Management Code (Ordinance). 2015 City of Tucson. Standards Manual for Drainage Design and Floodplain Management in Tucson, AZ. 1998 Pima County. Drainage and Channel Design Standards for Local Drainage. 1984 Pima County. Pima County Roadway Design Manual (4t1i Edition). 2013 Pima County Regional Flood Control District. PC -Hydro 7.4 (Web Application). Pima County Regional Flood Control District. Design Standards for Stormwater Detention and Retention for Pima County. 2015 Pima County Regional Flood Control District. TECH-006: Erosion Protection for Fill Pads in Regulatory Floodplains. 2021 Pima County Regional Flood Control District. TECH-015: Acceptable Methods for Determining Peak Discharges. 2021 Pima County Regional Flood Control District. TECH-033: Criteria for Two -Dimensional Modeling. 2021 FLO-2D Software, Inc. FLO-2D Pro software. 2023 Arizona Department of Water Resources. State Standard 1 Instructions for Organizing and Submitting Technical Support Data Notebooks (TSDN) for Flood Studies. 2012 Flood Control District of Maricopa County. Drainage Design Manual. 2018 Federal Highway Administration. Design of Riprap Revetment (Hydraulic Engineering Circular No. 11). 1989 U.S. Army Corps of Engineers. Hydrologic Engineering Center. HEC-RAS (River Analysis System). Hydraulic Reference Manual. 11. Glossary AASHTO: Abbreviation for the American Association of State Highway and Transportation Officials. AERIAL REDUCTION FACTOR: The ratio of mean precipitation depth over a watershed resulting from a storm to the maximum point depth of the storm. 2024 Town of Marana Drainage Manual 22 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 166 of 395 MARANA AZ ALL WEATHER ACCESS: Access considered traversable by normal passenger vehicles, defined as a permanent, durable material with adequate protection against scour and erosion and having a depth of water no more than 12 inches above the roadway surface during a Base Flood. Asphalt, Concrete, and traffic rated pavers are considered durable surfaces. All other surfaces must be approved by the Town Engineer. See also the Floodplain and Erosion Hazard Management Code, Chapter 17-15 of the Town Code. ALLUVIAL CHANNEL: Water channels made up of loose sediments. The loose sedimentary materials are known as alluvium. The banks of the channel are subjected to erosion, or wearing away, by fast running water. ADEQ: Abbreviation for Arizona Department of Environmental Quality. ADWR: Abbreviation for Arizona Department of Water Resources AZPDES: Abbreviation for Arizona Pollution Discharge Elimination System AT -GRADE CROSSING: A depression or vertical sag in the roadway designed to allow drainage to cross "at -grade" without using culverts. BACKWATER: The effect tailwater has upon upstream flow. Backwater can also refer to the calculations that are performed to compute water -surface profiles in an open channel. CMID CANALS: Cortaro- Marana Irrigation District Canals that provide irrigation water to more than 10,000 acres of farmland. CONDITIONAL LETTER OF MAP REVISION (CLOMR): Federal Emergency Management Agency's (FEMA's) comment on a proposed project that would affect the hydrologic or hydraulic characteristics of a flooding source. A CLOMR does not revise the current National Flood Hazard Layer (NFHL). CURB INLET: An inlet which captures street drainage and discharges through the curb. This can consist of a sidewalk scupper or catch basin. DEPRESSED CURB: This drainage mechanism occurs when the curb is transitioned from full height curb to flowline of the road or parking area and can also be referred to as a curb cut for the purpose of taking flow off pavement without the use of a curb inlet. DRY WELL: An engineered hole with a grated inlet designed to dispose of floodwaters through a process of passive infiltration of floodwaters into the vadose zone (ie., the unsaturated sediments commonly found above the water table). DSSRR: Abbreviation for Design Standards for Stormwater Detention and Retention (2015) 2024 Town of Marana Drainage Manual 23 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 167 of 395 MARANA AZ EROSION HAZARD SETBACK (EHS): The minimum horizontal distance from the top of bank or the floodplain limit, whichever is closest to the centerline of the primary channel or outside channels in a multiple channel watercourse. FEDERAL HIGHWAY ASSOCIATION (FHWA) HYDRAULIC TOOLBOX: A stand-alone suite of calculators that perform routine hydrologic and hydraulic analysis and design computations. FEMA: Abbreviation for Federal Emergency Management Agency FLO-2D: A two-dimensional flood routing model that can simulate rainfall -runoff. HEC-1: A watershed computer program designed to simulate the surface runoff response of a river basin to precipitation by representing the basin as an interconnected system of hydrologic and hydraulic components. HEC-HMS: Hydrologic modeling system designed to simulate the complete hydrologic processes of dendritic watershed systems. HEC-RAS: One- and two-dimensional simulation software used in computation fluid dynamics to model the hydraulics of water flow through natural rivers and other channels. HYDRAULIC DESIGN SERIES (HDS) NO. 5 (2012): Combines culvert design information previously contained in Hydraulic Engineering Circulars (HEC) No. 5, No. 10, and No. 13 with hydrologic, storage routing, and special culvert design information. HYDRAULIC GRADE LINE (HGL): A line which represents the static head plus pressure head of flowing water. INFILTRATION TRENCH: Rock -filled trench designed for the purpose of temporarily storing runoff, and then subsequently disposing of runoff within the sub -surface through the process of infiltration. LETTER OF MAP CHANGE (LOMC): A general term used to refer to the several types of revisions and amendments to FEMA maps that can be accomplished by letter. LETTER OF MAP REVISION (LOMR): FEMA's official modification to an effective Flood Insurance Rate Map (FIRM). LOMRs can result in a physical change to the existing regulatory floodway, the effective Base Flood Elevations (BFEs), or the Special Flood Hazard Area (SFHA). LOW FLOW BRIDGE: a bridge which does not convey the standard 1% chance flow event with freeboard and typically has overtopping during the less frequent events. Low Flow Bridges may not meet the all-weather access requirement. MS4 GENERAL PERMIT: Authorizes the discharge of storm water from small Municipal 2024 Town of Marana Drainage Manual 24 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 168 of 395 MARANA AZ Separate Storm Sewer Systems provided that the permittee complies with the requirements set forth in the permit. NATURAL: Undeveloped; existed, undisturbed, prior to development of the site. NORTHWEST POLICY: Town policy that describes the requirements for total site retention and allowances for drywells within the Northwest Policy area shown on Figure 1. PC -HYDRO: The official modeling method for hydrology to be submitted to Pima County Regional Flood Control District and accepted by the Town of Marana. RECLAIMED SLOPE: Restored slope after excavation. RETENTION BASIN: A facility which stores surface runoff but is not provided with a positive outlet. No flow is discharged directly into a downstream watercourse from a retention basin but may be drained into the subsurface by infiltration. RILLING: A pattern of narrow, vertical troughs formed in relatively steep earthen embankments by floodwaters cascading down the embankment. SETBACK: The minimum horizontal distance between a structure and a channel, stream, wash, watercourse, or detention basin. A channel setback is measured from the top edge of the highest channel bank or from the edge of the 100-year water -surface elevation, whichever is closer to the channel centerline. SINGLE SUBDIVISION: A subdivision which is comprised of lots that is platted without a master plan and can be built without regional/spine infrastructure. TAFS: Abbreviation for the Tortolita Alluvial Fan Study TECH-015: Pima County Regional Flood Control District Technical Policy describing acceptable methods for determining peak discharges. TECH-033: Pima County Regional Flood Control District Technical Policy describing the criteria for two-dimensional modeling. TOWN: Town of Marana, a political subdivision of the State of Arizona. UNCONSOLIDATED SHEET FLOW: Shallow, unconcentrated and irregular flow along a plane. 2024 Town of Marana Drainage Manual 25 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 169 of 395 FIGURES 2023 Town of Marana Drainage Manual 26 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 170 of 395 N WPIMA )I S AUGUST 2024 MARICOPA COUNTY PINAL COUNTY 1<l& FIGURE 1 NW POLICY AREA MAP TOWN OF MARANA DRAINAGE MANUALE COUNT , � -,, �S14NTA \�� ��i COUNTY \ - CRU - ....... MARANA ... �' 0 0.5 1 2 3 Miles Town of Marana 11555 West Civic Center Drive Marana, Arizona 85653 (520) 382-1999 1 Inch = 0.5 Mile Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 171 of 395 '111_III_11I_111_ 111_ 111_ 111_111_I 11_ IH_111 �111_III _11y • •1 R11_111_111_1I1_111_111_111_ }- 1 -I IIL 1 :_III _III_L ! 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VALLEY I_lll_II I_III_111_III_111_111_I11_I11_111_ I11_ 111_111_I11_I11_ 111_III 11_Ill 1_111_III_111_111_111_lll_ 111_1 II_III_111_III _ 111_111_111_ III_ 111_111_111_ II Robles MARANA RD - 1_111_11I_111_III111_ Il l_l 11_111d111_ II 1_ 111_III MOORE RD Brawley Wash -Santa Cruz4River TANGERINE RD PEAKS 11 _ III_ 111_ 111_III_111_111_111_111_111_II 1_111_111_ III_I I I _ II1 _ II -- -1-r. ;_111F111 4H « C-ORTARO,FARMS]RD RE SUNSETRDmiL- J- MO.ORE RD i .. LAMBERT L-N INA,RD ®analda HARDY RD MAGEE RD County Boundaries NW Policy Area Marana Planning Boundary Watersheds j Town of Marana Limits Critical Basins Streams CAP Canal Major Roads WILDS LEGEND i a111_I11_111_111_111_111_111_111t 1 1 111_111_III_III_III_111_111_111_111I _ _ r h IOW Tanque Verde Creek=Rillito 44/ 7 Source: Esri, Maxar, Earths'tar,Geoggraph cs, and the GISNUse_r Community 1<l& N _ S /� 1 g August ust 2024 7 MARICOPA PINAL COUNTY FIGURE 3 BALANCED & CRITICAL BASINS MAP TOWN OF MARANA DRAINAGE MANUALCOUNTY PIMA _, �� S�4NTA �- �i� COUNTY CRU MARANA 1. AZ 0 1 2 4 6 Miles Town of Marana 11555 West Civic Center Drive Marana, Arizona 85653 (520) 382-1999 1 Inch = 1 Mile Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 173 of 395 APPENDIX A Report Formats/Maintenance Checklist 2024 Town of Marana 1 MARANA AZ Drainage Manual A Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 174 of 395 Drainage Statement Outline • Project Description • Project Location • Prior Studies • Floodplain Status o Local Regulatory o Federal • Methodology/Parameter Selection • Hydrology & Hydraulics o Offsite Drainage o Onsite Existing Conditions o Onsite Proposed Conditions • Erosion Mitigation • Sediment Deposition Mitigation • Clean Water Act Compliance • Conclusion Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 175 of 395 Drainage Report Outline • Cover • Table of Contents • Project Description • Project Location • Prior Studies • Floodplain Status o Local Regulatory o Federal • Methodology/Parameter Selection • Hydrology & Hydraulics o Offsite Drainage o Onsite Existing Conditions o Onsite Proposed Conditions • Detention/Retention • Erosion Mitigation • Sediment Deposition Mitigation • Clean Water Act Compliance • Conclusion Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 176 of 395 Master Drainage Report Outline • Cover • Table of Contents • Master Plan Description • Master Plan Location • Prior Studies • Floodplain Status o Local Regulatory o Federal • Methodology/Parameter Selection • Hydrology & Hydraulics o Offsite Drainage o Onsite Existing Conditions • Master Drainage Concept o Block Drainage Plan o Regional Detention/Retention o Spine Drainage Infrastructure o Erosion Mitigation o Sediment Deposition Mitigation • Phasing/Interim Drainage Requirements • Clean Water Act Compliance • Conclusion Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 177 of 395 Private Drainage Improvement Inspection and Maintenance Checklist Date: Project Name/Location: Inspector: Title: Affiliation: Type of Inspection: ❑ Annual ❑ After a Significant Storm Event General Requirements • Improvements shall be maintained to perform as designed for the life of the project and shall not be converted to a different use without a Floodplain Use Permit. A Floodplain Use Permit is not required for maintenance activities. • Improvements shall be inspected annually and after significant storm events. • The purpose of the inspection is to evaluate whether as -built characteristics are maintained. Component Inspection Item Requires Maintenance If maintenance is required, describe corrective action As -built grades and elevations ❑ Inlet Presence of obstructions ❑ Evidence of material damage ❑ As -built grades and elevations ❑ Outlet Presence of obstructions ❑ Evidence of material damage ❑ As -built grades and elevations ❑ Earthen Invasive non-native plants ❑ Slopes Slope treatment ❑ As -built grades and elevations ❑ Retaining walls Presence of damage or instability ❑ Drainage function ❑ As -built grades and elevations ❑ Depth Sediment accumulation >10% of design volume ❑ As -built grades and elevations ❑ Presence of ponding ❑ Basin/Channel Floor Evidence of oil, grease, chemicals or trash ❑ Presence of invasive non-native plants Marana Town Council Regular Meeting Agenda Packet Page 178 of 395 November 19, 2024 Private Drainage Improvement Inspection and Maintenance Checklist (Continued) Date: Project Name/Location: Component Inspection Item Requires Maintenance If maintenance is required, describe corrective action Perimeter Wall As -built grades and elevations Presence of damage or instability Drainage function Security Barrier Presence of damage or instability Access Presence of obstruction Landscaping Presence of overgrown vegetation Presence of invasive non-native plants Damage to basin due to landscape elements Pump Alarm System Presence of obstruction As -built specifications Dry/Rock Well Presence of sediment and/or standing water for more than 36-hours Armored Slopes Cracking Sloughing As -built grades and elevations Toe Down Exposed Buried/not visible Sediment Deposition As -built grades and elevations Aggradation ongoing Only at specific locations Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 179 of 395 APPENDIX B Excerpts from Other Manuals 2024 Town of Marana .46., MARANA AZ Drainage Manual B Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 180 of 395 VI. EROSION AND SEDIMENTATION On watersheds larger than one square mile, the guidelines cited above may result in overdesign. The design of sediment basins on these watersheds is a more complicated procedure, involving total watershed sediment yield and channel sediment - transport capacity over a range of discharges. Total watershed sediment yield can be estimated by such methods as the Modified Universal Soil Loss Equation (Williams, 1975; and Williams and Berndt, 1977), the Pacific Southwest Inter -Agency Committee (PSIAC) Method (Pacific Southwest Inter -Agency Committee, 1968), the Flaxman Method (Flaxman, 1972), the SCS Method (U.S. Soil Conservation Service, 1971), the Dendy/ Bolton Method (Dendy and Bolton, 1976), and the Renard Method (Renard, 1972). A publication by Renard and Stone (1981) contains a detailed discussion and comparison of some of these methods. The equations for watershed sediment yield which are listed above do not readily distinguish between sediment production that would be classified as wash load and sediment production that would be classified as bed load. Wash load particles are so small that they would generally remain in suspension as the water passes through the detention basin. Therefore, the wash load is not generally to be considered in sediment basin design. An estimate of wash load, as compared to bed load estimated from equations for total watershed sediment yield, can be made by taking samples of the topsoil throughout the watershed. Total watershed sediment production may not be an entirely accurate estimate of the amount of sediment that would be delivered to a certain point, because there is sediment storage within the watershed system. Sediment -volume estimates must therefore also consider the sediment -transport capacity of the channel. A detailed discussion of this type of analysis will not be presented here. However, the reader is referred to publications by the U.S. Army Corps of Engineers (1977), Simons, Li & Associates (1982, 1985), the American Society of Civil Engineers (1977), Simons and Senturk (1977), and Zeller and Fullerton (1983) for more detailed information about performing such analyses. 6.9 Equilibrium Slopes within Constructed Channels Given a fixed size distribution of sediments, the sediment -transport capacity of a stream is dependent primarily upon flow velocity and depth. Within the City of Tucson, transport of all particle sizes of bed material increases, as flow velocity increases, at a rate proportional to approximately the third to fifth power of the velocity. Correspondingly, transport of sediment particles composed of bed material generally decreases as depth increases, while transport increases with decreased depth. However, flow velocity is by far the more important variable. For purposes of analysis and design, most natural, undisturbed channels in the Tucson area can be assumed to be at or near a state of dynamic equilibrium with regard to sediment transport. This means that, for a given reach of the channel, the sediment -transport capacity of the channel, over the long term, is more or less equal to the sediment supply. The channel bed slope is therefore "stable." When channelization occurs, the channel top width is often narrowed, and channel roughness is normally decreased. The result is an increase in velocity and depth, with 6.31 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 181 of 395 VI. EROSION AND SEDIMENTATION a corresponding increase in sediment -transport capacity. Sediment -transport capacity then exceeds the sediment supply; and, if the bed is composed of sediment that can be transported, the deficiency will be made up from bed material --causing the channel to degrade. Another factor that contributes to this degradation is upstream urbanization. Urbanization increases flood peaks, which also lead to higher flow velocities and depths. Urbanization also reduces the watershed sediment supply, and increases the frequency of runoff. The result of all these occurrences is that channel bed degradation will occur until the channel slope is flat enough to cause the sediment - transport rate to be equal to the incoming sediment supply. This slope then becomes the new, "stable," equilibrium slope. Streambed degradation can threaten underground improvements, bank -protection toe -downs, culverts, and other hydraulic structures that are within and/or that cross the channel. Grade -control structures, or lining of the channel bed, are usually required in order to prevent damage caused by streambed degradation. The equilibrium slope for a channel which has an upstream sediment supply that is considered to be essentially zero (e.g., a channel located within a highly urbanized watershed) can be computed from: 2 1.45n `Seq — g0.11 Where: Seq = Equilibrium slope after urbanization, in feet per foot; n — Manning's roughness coefficient; and, q = Channel unit discharge, in cubic feet per second per foot. (6.25) For use with Equation 6.25, channel unit discharge is defined as the channel discharge divided by the channel bottom width. Use of this equation will produce the flattest slope that can be reasonably expected to transport sediment within channels located in the Tucson area. The discharge associated with a 10-year flood is normally chosen when computing the unit discharge for use in Equation 6.25. For lesser degrees of urbanization, the equilibrium slope is computed from Equation 6.26, which is a generalization of the theoretically derived sediment -transport relationships for sandbed channels developed by Zeller and Fullerton (1983): Seq 2 nu Qu,10 l[ nn Qn,10 6.32 b„ bn Sn (6.26) Marana Town Council Regular Meeting Agenda Packet Page 182 of 395 November 19, 2024 VI. EROSION AND SEDIMENTATION Where: nu = Manning's roughness coefficient for an urban channel; nn = Manning's roughness coefficient for a natural or existing channel; Qu io = Ten-year discharge, under urbanized conditions, in cubic feet per second; Qn io = Ten-year or bank -full discharge (whichever is less), under natural conditions, in cubic feet per second; b„ = Bottom width of channel, under urbanized conditions, in feet; bn = Bottom width of channel, under natural conditions, in feet; Rs = Reduction factor for sediment supply. This factor is usually assumed to be equal to the ratio of the impervious area to the total area of the upstream watershed (i.e., 0.0 < Rs < 1.0); and, Sn = Natural or existing channel slope, in feet per foot. The roughness coefficients for natural and urbanized channel beds are often very nearly the same, so the term in which these coefficients appear in Equation 6.26 can usually be assumed equal to the value 1.0. However, from time to time exceptions to this assumption may occur. For instance, when the existing channel is a wide, flat, sheetflow watercourse; and the proposed channel is a narrow, sand -bed channel, nu will ordinarily not be equal to nn. For moderately urbanized to highly urbanized watersheds, the equilibrium slope should be computed by using both Equation 6.25 and Equation 6.26. The steeper of the two computed slopes should then be used for design. The reason for this is that Equation 6.26 can sometimes produce slope values that are too flat to generate reasonable sediment -transport rates for maintenance of channel stability, when impervious cover within a watershed is very high. Equation 6.26 should be used with caution within the City of Tucson. An underlying assumption of this equation is that the existing or natural channel is itself in equilibrium. This is not always true in the City, because most channels have undergone alteration. If there is any question as to whether or not the existing channel is in equilibrium, it is best to try and determine through old (pre -development) aerial photographs and topography what the channel characteristics were in its original, undisturbed (i.e., natural) state. In the absence of historical information about the original channel, an examination may be made of existing stable channels in the area to help estimate what the channel in question may have looked like before urbanization. Equation 6.26 can be used for more than merely the quantification of streambed degradation. It can also be used to determine whether aggradation will occur when a channel is widened beyond existing or natural conditions. Another application would be to use it to design a stable channel cross-section in lieu of installing grade -control structures to otherwise control degradation of the channel bed. 6.33 Marana Town Council Regular Meeting Agenda Packet Page 183 of 395 November 19, 2024 VI. EROSION AND SEDIMENTATION 6.10 Spacing and Depth of Grade -Control Structures If the equilibrium slope of a channel, as determined by use of either Equation 6.25 or Equation 6.26, is flatter than the design slope, grade -control structures may be needed to limit degradation from exceeding a certain depth at any point along the channel. Grade -control structures, sometimes called "cut-off walls" or "check dams," are non -erodible vertical barriers in the channel that prevent the channel bed from degrading at a point located immediately upstream of where they are located. After the channel bed has reached equilibrium, the bed elevation immediately upstream of the grade -control structure is at the design elevation. Downstream of the grade -control structure, the bed is at an "equilibrium" elevation that is lower than the design elevation. For most channels, the design of grade -control structures is an iterative process, involving drop height, reach length, and depth of scour downstream of the drop. Once a drop height is chosen, the reach length, or spacing, between adjacent structures can be computed from: h Lr— Sib - Sec, Where: (6.27) Li. = Reach length, or spacing, between adjacent grade -control structures, in feet; h = Drop height downstream of the grade -control structure, in feet; Sib = Initial channel bed slope, in feet per foot; and, Seq = Channelized equilibrium bed slope, in feet per foot. If the initial and final bed slopes are approximately the same, the distance between grade -control structures will be very large. Under these circumstances, such structures may not be required. Normally, the drop height downstream of a grade -control structure which consists of poured concrete without reinforcements shall not exceed two feet; and preferably should be only one foot, where feasible. For economical and technical reasons, grade - control structures should be spaced no closer together than twelve times the local scour depth below the grade -control structures, as computed by the use of either Equation 6.13 or Equation 6.14. The total height of a cut-off wall or a grade -control structure (Dcw), from top to toe, shall not be less than the drop height plus the computed depth of scour below the wall or structure (see Figure 6.6). The depth of scour below grade -control structures should be computed according to the guidelines presented in Section 6.6.6 of this Manual. For a one -foot -wide, unreinforced concrete cut-off wall, if structural calculations support same, the maximum allowable height of a cut-off wall, from top to toe, can be six feet. If the depth of scour plus the drop height is greater than six feet, the drop shall be considered to be too great for unreinforced concrete cut-off walls, unless a structural analysis can demonstrate otherwise, and the spacing between 6.34 Marana Town Council Regular Meeting Agenda Packet Page 184 of 395 November 19, 2024 VI. EROSION AND SEDIMENTATION the cut-off walls must be reduced. The example which follows (i.e., Example 6.1), illustrates the recommended procedure for cut-off wall design. There will be many design situations, especially when unit discharges are high, where a cut-off wall with a hegith of six feet, from top to toe, is not sufficient. In such cases, a reinforced concrete cut-off wall that has a height greater than six feet, from top to toe, may be used, provided that a structural analysis is submitted showing that the proposed cut-off wall will be structurally stable. If a structural analysis is submitted and approved, the maximum drop height of two feet will no longer apply. Grade -control structures for large discharges need not necessarily be vertical on the downstream side. For structural stability, a triangular or wedge-shaped soil -cement grade -control structure is recommended for use on regional watercourses. However, for hydraulic reasons, the use of any grade -control structure with a face flatter than I:1 on the downstream side shall not be permitted without prior written approval from the City Engineer. EXAMPLE 6.1: SPACING AND DEPTH OF GRADE -CONTROL STRUCTURES A channel in a highly urbanized watershed is to be built to contain the 100-year- flood discharge. The sides of the channel are to be of shotcrete, the bottom of earth. Channel characteristics are as follows: Bottom Width Design Slope Side Slopes Manning's "n" = 20 feet = 0.006 feet/foot = 1:1 = 0.022 Hydraulic characteristics are as follows: Q100 Y100 v 100 4100 = 700 cfs = 3.1 feet = 9.7 fps = 35.0 cfs/foot Qio = 350 cfs 2.1 feet Yio = Vio = 7.7 fps q10 = 17.5 cfs/foot Because the watershed is highly urbanized, Equation 6.25 will be used to compute the equilibrium slope. Therefore: 2 Seq. 1.95 (0.022) = 0.0005 feet/foot. (17.5)0.11 Assume a two -foot drop height. From Equation 6.27, the spacing between grade - control structures should be: 6.35 Marana Town Council Regular Meeting Agenda Packet Page 185 of 395 November 19, 2024 VI. EROSION AND SEDIMENTATION 2.0 Lr (0.006)-(0.0005) = 364 feet. The grade -control structure will be submerged. Using Equation 6.14 yields: Ziss = 0.581 o s67 h Y o 411 1- h Y ° 118 (4100) (/ loo) [ (/ 100)] g100 = 35.0 cfs; Zi88 = 0.581 (35.0)0.667 (0.645)0.411 (0.355)-0.118; so, Zhae = 5.9 feet. Therefore, the total height of the grade -control structure, from top to toe, should be 5.9 feet plus the two -foot drop height; or, 7.9 feet (round to 8.0 feet). However, it is desirable to keep the total vertical dimension of the grade -control structure, from top to toe, equal to or less than six feet. Therefore, a smaller drop height should be used. Using a drop height of one foot yields: Lr _ 1.0 = 182 feet. (0.006)-(0.0005) Z183 = 0.581 (35.0)0.667 (0.323)0 411(0.677)0.118; so, Z1 = 4.10 feet (round to 4.0 ft). Since, in this example, the ultimate drop height at the downstream side of a grade -control structure will be set at one foot, cut-off walls with a height of five feet, from top to toe, could be placed at approximately 180-foot intervals along the bottom of the channel to serve as grade -control structures in order to limit long-term bed degradation to a maximum of one foot anywhere along the subject channel. 6.36 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 186 of 395 CHAPTER VI: EROSION AND SEDIMENTATION 6.1 Introduction The hydrology and hydraulics of floodwaters are not the only concern of floodplain-management administrators and/or drainage design engineers who work in arid or semi -arid environments which contain alluvial rivers such as those that exist both within and around the City of Tucson, Arizona. The transport of sediment by floodwaters is also a major concern because of the potential for rapid bank erosion and changes in channel bed elevations. Bank erosion can often be so severe that it causes much more damage than inundation by floodwaters. Aggradation or degradation of the channel bed can rapidly change flood limits, or cause bank protection and other channel improvements to fail over a very short period of time. The study of fluvial geomorphology and the analysis of sediment transport are usually undertaken in an attempt to quantify the broad effects of erosion and sedimentation and the impacts of sediment -transport capacity upon channel morphology. Sediment -transport analysis is a relatively specialized field of study. Predictions based upon its application are often expensive to produce, and can be highly variable in nature. Therefore, as an aid to the user, this chapter of the Manual presents some design and predictive guidelines that can be used within the City of Tucson in the absence of a more detailed sediment -transport analysis. 6.2 Purpose The purpose of this chapter is to provide guidelines for the estimation of erosion, sedimentation, and channel bed scour when designing drainage channels and hydraulic structures which are to be located within the City of Tucson. These design guidelines and procedures are to be used when normal design situations are encountered. Deviations from these guidelines may occur, provided that the user has experience in sediment -transport technology; and provided that the deviation is technically justified, through detailed sediment -transport analysis, to the satisfaction of the City Engineer. 6.3 Fluvial Geomorphology The study of fluvial geomorphology normally involves analyses which encompass entire drainage systems. This is so because the response of an individual channel to change within a watershed can often have an effect upon the entire drainage system. Conversely, the fluvial system, as a whole, will ultimately dictate the response of an individual channel to overall change within a watershed. Rarely is it possible to understand the fluvial processes which occur within even a short reach of an alluvial channel in isolation from its upstream and downstream system controls. The fluvial system is generally divided into three zones (Schumm, 1977). Zone 1 is characterized as the drainage basin, watershed, or source area for sediment. This is the area from which water and sediment are derived. Storage of sediment is not significant in this zone. Zone 2 is characterized as the transport zone; where, for a stable channel, sediment input can equal sediment output. For those reaches where the sediment -transport capacity exceeds the upstream supply, it can be assumed that the sediment deficit will be made up out of the channel bed or banks. Channel bed 6.0I Marana Town Council Regular Meeting Agenda Packet Page 187 of 395 November 19, 2024 VI. EROSION AND SEDIMENTATION degradation or erosion of channel banks will be the result. Zone 3 is characterized as the sediment sink or area of deposition. Obviously, the division between these three zones is indiscrete. Each zone has characteristics of the other two, which are subordinate to the primary characteristic of the zone. Zone 2 is of major concern to the hydraulic and river -control engineer, and to geomorphologists concerned primarily with river -channel morphology. It is this zone with which this chapter deals. 6.3.1 Channel Morphology Sediment and water moving through alluvial channels are the independent variables that determine the size, shape, and pattern of the channel. Numerous empirical relations have been developed that relate channel morphology to water and sediment discharge. 6.3.1.1 Hydraulic Geometry of Alluvial Channels As a general rule, the greater the quantity of water that moves through a channel, the larger is the cross -sectional area of that channel. Preceded by numerous studies of canal morphology and stability, Leliaysky (1955) and Leopold and Maddock (1953) demonstrated that, for most rivers, the water surface width, T, and depth, Y, increase with mean -annual discharge, Qa, in a downstream direction such that: and, T = klcda Y = k2Qa (6.1) (6.2) Both the coefficients and exponents of Equations 6.1 and 6.2 (i.e., the "kl," "k2," "b," and "c" values) are different for each river and, when data from a number of rivers are plotted against discharge, the scatter covers an entire log cycle. For a given discharge, there is an order of magnitude range of width and depth. Therefore, other variables apparently influence the hydraulic geometry of channels as well. 6.3.1.2 Influence of Sediment Load A primary variable which significantly controls river morphology is sediment load. Bed -material load is defined as that part of the stream's sediment load that consists of sediment sizes comprising a significant part of the streambed. The other component of total sediment load is wash load, which is part of the total load not significantly represented in the bed. In and around the Tucson area, wash load is generally composed of sediments smaller than sand (i.e., smaller than about 0.06 mm to 0.07 mm). Wash load is held in suspension by the turbulence of the flowing water, and therefore is transported at the same velocity as the water. Bed -material load is composed of sands and larger sediments, and therefore is generally transported at an average velocity less than the velocity of flowing water. 6.02 Marana Town Council Regular Meeting Agenda Packet Page 188 of 395 November 19, 2024 VI. EROSION AND SEDIMENTATION From an analysis of data from regime canals, Lacey (1930) concluded that the wetted perimeter of a channel is directly dependent upon discharge; but that channel shape reflects sediment size. It is also generally recognized that coarse sediment produces channels with high width/depth ratios, while fine sediment produces channels with narrow and deep cross sections. In addition to the size of the transported sediment, relative amounts of bed - material load and wash load significantly influence the morphology of sand -bed streams. Large bed -material loads are associated with wide channels, and large wash loads are associated with narrow widths. The type of sediment load is considered to be a more important control on stable channel shape than the total quantity of sediment transported through a channel. For example, in one channel a certain quantity of bed -material load may exert the dominant control if it is the total load, whereas in another channel the same amount of bed - material load may exert much less influence on channel shape because it is only a small part of the total sediment load (i.e., wash load and bed -material load). Therefore, when load and discharge are constant, an increase in the quantity of bed - material load will cause an increase in channel width, and a corresponding increase in the width/depth ratio. This phenomenon is probably related to the high gradient and velocity of flow generally associated with large bed -material Ioads. In summary, for alluvial channels which occur in the Tucson area, the type and amount of sediment load exerts a major control on their shape. Therefore, for a single channel under the ideal assumption of a constant discharge and a fixed amount of wash load, a change in bed -material load would be reflected by a change in both the shape and gradient of the channel. 6.4 Sediment -Transport Theory Sediment particles are transported by flowing water in one or more of the following ways: (1) surface creep, (2) saltation, and (3) suspension. Surface creep is the rolling or sliding of particles along the bed. Saltation (jumping) is the cycle of motion above the bed, with resting periods on the bed. Suspension involves the sediment particle being supported by the water during its entire motion. Sediments transported by surface creep, sliding, rolling, and saltation are referred to as bed load, and those transported by suspension are called suspended load. The suspended load consists of sands, silts, and clays. Total sediment load is defined as the sum of the bed load and suspended load. Generally, the amount of bed load transported by a large river is on the order of five to twenty-five percent of the suspended load. Although the amount of bed load may be relatively small compared with total sediment load, it is important because it shapes the bed, influences channel stability, determines the form of bed roughness, and affects various other hydraulic factors as well. As presented earlier, the total sediment load in a channel can be more simply defined as the sum of bed -material load and wash load; where the bed -material load is the sum of bed load and suspended bed -material load, representing that part of the total sediment discharge which is composed of grain sizes found in the bed; and the wash load is that part of the sediment discharge which is composed of particle sizes 6.03 Marana Town Council Regular Meeting Agenda Packet Page 189 of 395 November 19, 2024 VI. EROSION AND SEDIMENTATION finer than those found in appreciable quantities in the bed (Simons and Senturk, 1977). The presence of wash load can increase bank stability, reduce seepage, and increase bed -material transport. Wash load can be easily transported in large quantities by the stream, but is usually limited by availability from the watershed. The bed -material load is more difficult for the stream to move, and is normally limited in quantity by the transport capacity of the channel. Figure 6.1 summarizes the various definitions of the components of sediment load, and their contribution to total sediment load. There is no clear size distinction between wash load and bed -material load. As a rule of thumb for the Tucson area, it should be assumed that the size of bed -material particles is equal to or larger than 0.0625 mm, which is the division point between sand and silt. The sediment load consisting of grains smaller than this size is then considered as wash load. It is generally assumed that most of the wash load is transported through the system by stream flow, and that little wash load is deposited on or in the stream bed. Wash Ioad deposited with coarse material is usually only a very small fraction of the total bed material within the channel. The amount of material transported, eroded, or deposited in an alluvial channel is a function of both the sediment supply and the sediment -transport capacity of the channel. Sediment supply includes the quality and quantity of sediment brought to a given reach. Sediment -transport capacity is a function of the size of bed material, flow rate, and geometric and hydraulic properties of the channel. Generally, the single most important factor determining sediment -transport capacity is flow velocity. Additionally, since sediment -transport capacity is generally proportional to the third to fifth power of the velocity, small changes in velocity can cause large changes in sediment -transport capacity (Simons, Li & Associates, 1982, 1985). Either the sediment supply or sediment -transport capacity may limit the actual sediment -transport rate in a given reach. 6.5 Sediment Routing Supported by qualitative and quantitative analysis, a detailed evaluation of the fluvial -system response can be made based upon mathematical -modeling concepts. A mathematical model is simply a quantitative expression of the physical processes. The mathematical processes governing watershed and river responses are complicated. Computer programs can provide a means of assessing the many parameters of these complex processes within a fluvial system. There are several computer models available which are applicable to this region. For information on where to obtain these models, the user should contact the City Engineer. 6.5.1 Simplified Sediment Modeling After evaluating the hydraulic conditions of the river by water -routing programs such as the U.S. Army Corps of Engineers HEC-2 program, the sediment -transporting capacity can be established. Sediment -transport equations are used to determine the sediment -transport capacity for a specific set of flow conditions. Different transport capacities can be expected for different sediment sizes. For each sediment size, the transport rate includes the transport rate of the bed Ioad and the transport rate of the suspended bed -material load. 6.04 Marana Town Council Regular Meeting Agenda Packet Page 190 of 395 November 19, 2024 VELOCITY PROFILE VI. EROSION AND SEDIMENTATION v WASH LOAD COMPOSED OF PARTICLE SIZES FINER THAN THOSE FOUND IN APPRECIABLE QUANTITIES IN THE BED. WASH LOAD MOVES 1N SUS- PENSION, AND IS PROVIDED BY AVAILABLE BANK AND WATERSHED SUPPLY. BED LOAD COMPOSED OF PARTICLE SIZES TYPICALLY FOUND IN THE BED THAT MOVE BY SURFACE CREEP, SLIDING, SATIATION, OR ROLLING WITHIN THE BED LAYER. 11 1 SUSPENDED BED - MATERIAL LOAD COMPOSED OF PARTICLES TYPICALLY FOUND IN THE BED THAT REMAIN IN SUSPENSION DURING TRANSPORT. BED —MATERIAL LOA D TOTAL SEDIMENT LOA D NOTE: THE TERM "SUSPENDED LOAD" IS USED WHEN REFERRING TO THE SUM OF THE "WASH LOAD" AND "SUS- PENDED BED -MATERIAL LOAD" COMPONENTS. THEREFORE, AN ALTERNATE DEFINITION OF TOTAL SEDIMENT LOAD IS THE SUM OF THE SUSPENDED LOAD AND BED LOAD. FIGURE 6.1 DEFINITION OF SEDIMENT- LOAD COMPONENTS 6.05 Marana Town Council Regular Meeting Agenda Packet Page 191 of 395 November 19, 2024 VI. EROSION AND SEDIMENTATION One modeling method uses hydraulic conditions from a rigid -boundary model such as HEC-2, or an equivalent program, and computes sediment transport based upon the Meyer -Peter, Muller bed -load equation and the Einstein suspended -load procedure for each sediment size found in the bed. The data required are the same as for HEC-2 (channel geometry, resistance, bridge constriction, etc.). Also needed are the size distribution of the bed -material and the upstream sediment supply. Using the generated hydraulic conditions, the transport capacity for each sediment size at each cross section is then determined. Actual transport rates depend upon transport capacities as well as supply rates. The change in transport capacity between two cross sections can be used to estimate aggradation or degradation, based upon availability. For example, if sediment is in ample supply to meet the transport capacity at an upstream cross section but at the next cross section downstream the transport capacity is only one-half as much, then the other one-half of the sediment passing the upstream cross section must be deposited between the upper and lower cross sections. This comparison of transport capacities continues reach by reach and size fraction by size fraction through the entire stream segment. The drawback to this simplified approach is that the hydraulic conditions are not readjusted, due to aggradation or degradation, at frequent time increments during the passage of the flood hydrograph. However, this technique does provide "trends" in bed -elevation changes without using more complex techniques. 6.5.2 Quasi -Dynamic Sediment Modeling The sediment -routing model previously discussed is based upon a gradually -varied - flow backwater program which assumes a rigid -boundary system. This methodology can be extended to account for unsteady flow and alluvial -channel boundaries without going to a fully unsteady water and sediment -routing model. The quasi -dynamic sediment model uses the same gradually -varied -flow backwater program for hydraulic computations. However, the flow is assumed constant for a given time increment at. A flow event, either short-term or long-term, can be broken into a number of time increments, each with a different flow rate, but during each increment the flow is considered steady. To account for a non -rigid or alluvial boundary, when a predetermined volume of sediment is either deposited on or eroded from the streambed, the cross section is recomputed in the following manner. Sediment aggradation or degradation within a reach for a given time period is nVa = (sediment supply - sediment transport) x BF, where AV, is the change in sediment volume in the reach and BF is a bulking factor. The change in sediment volume is assumed to be uniformly distributed throughout the reach. Change in area for each cross section is determined by a weighting factor based upon the conveyance in adjacent segments of the cross sections. The changes in elevation are used to generate a new HEC-2 data file for the next time period. Therefore, during any given time period the channel boundary is assumed to be rigid and the HEC-2 analysis is assumed to be valid. After evaluating the hydraulic conditions and the sediment - transport capacity, the channel boundary is modified to reflect the aggradation/ 6.06 Marana Town Council Regular Meeting Agenda Packet Page 192 of 395 November 19, 2024 VI. EROSION AND SEDIMENTATION degradation changes occurring throughout the river, and to establish the new channel configuration for the next time step. This methodology has been successfully applied to a number of practical engineering problems. It provides a feasible and relatively cost-effective approach to design problems in alluvial rivers. 6.5.3 Dynamic Mathematical Modeling Dynamic mathematical modeling of water and sediment routing is the next level of sophistication and complexity in determining alluvial -channel changes. It involves unsteady, non -uniform flow routing for determining the hydraulic conditions to be used to calculate sediment transport, aggradation, and degradation. Unsteady, non -uniform flow routing solves equations governing the motion of water in open channels. These equations are mathematical descriptions of the physical phenomena. The two basic principles for water routing are continuity and momentum. Continuity states that water coming into a reach is either stored in the reach or passes downstream without gaining or losing water. The momentum principle balances the forces and accelerations acting on flowing water. Generally, the continuity and momentum equations, along with a resistance to flow equation involving Manning's n or. Chezy's C, are solved numerically in finite - difference form. The results are the hydraulic variables of velocity, depth, and width for unsteady, non -uniform flow. These are then used to route sediment. Sediment movement is controlled by the shear forces acting on the bed, transport capacity of the flow, and both availability and supply. Equations used in these calculations are described in most sedimentation textbooks. To compute aggradation and degradation, the sediment -continuity equation is used. While dynamic mathematical modeling can give excellent results, it is very complex. Fortunately, it is not often required to solve many of the more straightforward, practical problems that designers will usually encounter within the Tucson area. In fact, most aggradation and degradation problems can be solved to an acceptable degree of accuracy by the several methods previously described within this chapter of the Manual. 6.6 Depth of Scour Scour, or lowering of a channel bed (excluding long-term aggradation/ degradation), can be caused by discontinuity in the sediment -transport capacity of the flow during a runoff event (general scour); the formation of anti -dunes in the channel bed during a runoff event; transverse currents within the flow through a bend (bend scour) during a runoff event; local disturbances, such as abutments or bridge piers, during a runoff event; and the formation of a low -flow channel thalweg. The design depth of scour (excluding long-term aggradation/degradation, which must be added for toe -down design) is the sum of all these individual scour components, and can be expressed by: 6.07 Marana Town Council Regular Meeting Agenda Packet Page 193 of 395 November 19, 2024 VI. EROSION AND SEDIMENTATION Zt = 1.3 (ZgB + 1/2Za + ZlB + ZbB + Zlft) (6.3) Where: Zt = Design scour depth, excluding long-term aggradation/degradation, in feet; Zgs = General scour depth, in feet; Za = Anti -dune trough depth, in feet; Zia = Local scour depth, in feet; ZbB = Bend scour depth, in feet; Zlft = Low -flow thalweg depth, in feet; and, 1.3 = Factor of safety to account for nonuniform flow distribution. The various equations for depth of scour which are to follow were developed strictly for use in conjunction with sand -bed channels in which the bed material is erodible to the depth specified by the applicable equations. However, this situation does not always exist in channels located within the City of Tucson. In some areas of the city, the channel has degraded to a point where the exposed bed is no longer composed of strictly unconsolidated alluvial material, but rather of consolidated hard- pan or caliche. Channel beds composed of this type of material are not freely erodible, and thus the scour equations which follow may not strictly apply. Should such conditions be encountered, a geotechnical investigation should be submitted by an Arizona Registered Professional Civil Engineer to justify the use of a lesser scour depth than would be determined from the use of Equation 6.3. 6.6.1 General Scour As previously discussed in Section 6.5 of this Manual, the depth of general scour is best estimated by performing a detailed sediment -transport analysis using the bed grain -size distribution, hydraulic conditions, sediment -transport capacity at different stages throughout the flow event, changes in bed levels throughout the event, and the sediment supply into the reach being studied. An analysis to this level of detail is beyond the scope of this Manual. However, there are several computer models commercially available to aid in making an estimate of general scour. Unfortunately, these models are very sensitive to input, and the results are best interpreted by someone with extensive experience in the field of sediment transport. A detailed discussion of sediment -transport analysis for computing general scour can be found in "Engineering Analysis of Fluvial Systems" (Simons, Li & Associates, 1982), and "Arizona Department of Water Resources Design Manual for Engineering Analysis of Fluvial Systems" (Simons, Li & Associates, 1985). General scour on regional watercourses should be estimated by undertaking a detailed sediment -transport study, as described above, when and where it is feasible to do so. However, such a study is not usually practical on smaller watercourses. Therefore, as an alternative to the above, on watercourses other than regional watercourses, the following equation (Zeller, 1981) should be used to predict general scour. 6.08 Marana Town Council Regular Meeting Agenda Packet Page 194 of 395 November 19, 2024 Zgs = Ymax Where: 0.0685 Vm8 _ A.4S0.3 VI. EROSION AND SEDIMENTATION -1 I (6.4) Za, = General scour depth, in feet; Vm = Average velocity of flow, in feet per second; Ymax = Maximum depth of flow, in feet; Yh = Hydraulic depth of flow, in feet; and, Se = Energy slope (or bed slope for uniform -flow conditions), in feet per foot. NOTE: Should become negative, assume that the general -scour com- ponent is equal to zero (i.e., Zs, = 0). 6.6.2 Anti -Dune Trough Depth Anti -dunes are bed forms, in the shape of dunes, which move in an upstream rather than a downstream direction within the channel; hence the term "anti -dunes." They form as trains of waves that build up from a plane bed and a plane water surface. Anti -dunes can form either during transitional flow, between subcritical and supercritical flow, or during supercritical flow. The wave Iength is proportional to the velocity of flow. The corresponding surface waves, which are in phase with the anti - dunes, tend to break like surf when the waves reach a height approximately equal to 0.14 times the wave length. A relationship between average channel velocity, Vm, and anti -dune trough depth, Za, can therefore be developed (Simons, Li & Associates, 1982). This relationship is: 1 2nV2m Za = 2 (0.14) g — 0.0137Vm (6.5) A restriction on the above equation is that the anti -dune trough depth can never exceed one-half the depth of flow. Therefore, if the computed depth of Z. obtained by using Equation 6.5 exceeds one-half of the depth of flow, the anti -dune trough depth should then be taken as equal to one-half the depth of flow. Figure 6.2 shows a definition sketch for anti -dune trough depth. 6.6.3 Low -Flow Thalweg A low -flow thalweg is a small channel which forms within the bed of the main channel, and in which low discharges are carried. Low -flow thalwegs form when the width/depth ratio of the main channel is large. Rather than flow in a very wide, shallow state, low flows will develop a low -flow channel thalweg below the average channel bed elevation in order to provide more efficient conveyance of these discharges. 6.09 Marana Town Council Regular Meeting Agenda Packet Page 195 of 395 November 19, 2024 VI. EROSION AND SEDIMENTATION CREST OF ANTI - DUNE WAVE-1 RIGINAL.* 6EQ - 'TROUGH -OF ANTI=DUNE:: . ORIGINAL WATERSURFACE 0 FIGURE 6.2 DEFINITION SKETCH FOR ANTI -DUNE TROUGH DEPTH 6.10 Marana Town Council Regular Meeting Agenda Packet Page 196 of 395 November 19, 2024 VI. EROSION AND SEDIMENTATION When the ratio of the flow width to the flow depth of a channel is greater than 1.15 times the average velocity of flow for the 100-year discharge, a low -flow thalweg must be included in all scour calculations. When the flow width or flow depth exceeds the top width and bank heights of the channel, use the top width and flow depth at bank -full conditions, instead of the actual flow width and flow depth. Presently, there is no known methodology for predicting low -flow thalweg depth. However, observation of channels in the Tucson area has revealed that low -flow thalwegs are normally one to two feet deep. Therefore, if a low -flow thalweg is predicted to be present, it should be assumed to be at least two feet deep within regional watercourses, and at least one foot deep within all other watercourses, unless field observations dictate otherwise. 6.6.4 Bend Scour Bend scour normally occurs along the outside of bends, and is caused by spiral, transverse currents which form within the flow as the water moves around the bend. Presently, there is no single procedure which will consistently and accurately predict bend scour over a wide range of hydraulic conditions. However, the following relationship has been developed by Zeller (1981) for estimating bend scour in sand -bed channels based upon the assumption of the maintenance of constant stream power within the channel bend: 0.2 0.0685YmaxVm8 sin2(a/2) Zbe a o.s 2.1 -1 (6.6) Yh' Se cos a Where: Zbe = Bend -scour component of total scour depth, in feet; = 0 when rc/T > 10.0, or a < 17.8° = computed value when 0.5 < rc/T < 10.0, or 17.8° < a < 60° = computed value at a = 60° when rc/T < 0.5, or a > 60° Vm = Average velocity of flow immediately upstream of bend, in feet per second; Ymax = Maximum depth of flow immediately upstream of bend, in feet; Yh -- Hydraulic depth of flow immediately upstream of bend, in feet; Se — Energy slope immediately upstream of bend (or bed slope for uniform -flow conditions), in feet per foot; and, a = Angle formed by the projection of the channel centerline from the point of curvature to a point which meets a line tangent to the outer bank of the channel, in degrees (see Figure 6.3). NOTE: Mathematically, it can be shown that, for a simple circular curve, the following relationship exists between a and the ratio of the centerline radius of curvature, ro to channel top width, T. rc cos a T 4 sin2(a/2) 6.11 (6.7) Marana Town Council Regular Meeting Agenda Packet Page 197 of 395 November 19, 2024 VI. EROSION AND SEDIMENTATION TANGENT TO CURVE CENTER OF CURVATURE PT• CHANNEL CENTERLINE PT = Downstream point of tangency to the centerline radius of curvature. PC = Upstream point of curvature at the centerline radius of curvature. FIGURE 6.3 ILLUSTRATION OF TERMINOLOGY FOR BEND -SCOUR CALCULATIONS 6.12 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 198 of 395 VI. EROSION AND SEDIMENTATION Where: rc = Radius of curvature along centerline of channel, in feet; and, T = Channel top width, in feet. If the bend deviates significantly from a simple circular curve, the curve should be divided into a series of circular curves, and the bend scour computed for each segment should be based upon the angle a applicable to that segment. Equation 6.6 can be applied to obtain an approximation of the scour depth that can be expected in a bend during a specific water discharge. The impact that other simultaneously occurring phenomena such as sand waves, local scour, long-term degradation, etc., might have upon bend scour is not known for certain, given the present state of the art. Therefore, in order that the maximum scour in a bend not be underestimated, it is recommended that bend scour be considered as an independent channel adjustment that should be added to those adjustments computed for long-term degradation, general scour, and sand -wave troughs. The Iongitudinal extent of the bend -scour component is as difficult to quantify as the vertical extent. Rozovskii (1961) developed an expression for predicting the distance from the end of a bend at which the secondary currents will have decayed to a negligible magnitude. This relationship, in a simplified form, can be expressed as: x = 0.6 Y' 0.6 n Where: (6.8) x = Distance from the end of channel curvature (point of tangency, PT) to the downstream point at which secondary currents have dissipated, in feet; n = Manning's roughness coefficient; g = Acceleration due to gravity, 32.2 ft/sec2; and, Y = Depth of flow (to be conservative, use maximum depth of flow, exclusive of scour, within the bend), in feet. Equation 6.8 should be used for determining the distance downstream of a curve that secondary currents will continue to be effective in producing bend scour. As a conservative estimate of the longitudinal extent of bend scour, both through and downstream of the curve, it would be advisable to consider bend scour as commencing at the upstream point of curvature (PC), and extending a distance x (computed with Equation 6.8) beyond the downstream point of tangency (PT). 6.6.5 Local Scour Local scour occurs whenever there is an abrupt change in the direction of flow. Abrupt changes in flow direction can be caused by obstructions to flow, such as bridge piers or abrupt contractions at bridge abutments. 6.13 Marana Town Council Regular Meeting Agenda Packet Page 199 of 395 November 19, 2024 VI. EROSION AND SEDIMENTATION The depth of scour at bridge piers is highly dependent upon the shape of the pier. Figure 6.4 gives several common pier shapes. A square -nosed pier causes the deepest scour. The depth of scour caused by a square -nosed pier is computed from (Richardson et al., 1975): 0.65 by Z1ep = 2.2 Y Y F0.43 u Where: Z1ap = Local scour depth due to pier, in feet; Y = Flow depth, in feet; by = Pier width normal to the flow direction, in feet; and, Fu = Upstream Froude number. (6.9) Table 6.1 can be used for computing the reduction in the depth of pier scour for the various types of piers shown in Figure 6.4. TABLE 6.1: REDUCTION FACTORS TO BE USED WHEN APPLYING SCOUR FORMULAS FOR SQUARE -NOSED PIERS TO OTHER SHAPES (assuming equally projected widths of piers) Type of Pier Reduction Factor Square Nose Cylinder Round Nose Sharp Nose Group of Cylinders 1.0 0.9 0.9 0.8 0.9 Scour is reduced if the pier is streamlined in the direction of flow. However, many watercourses transport significant amounts of debris during large floods. Such debris can become impaled upon bridge piers, leading to an increase in the pier -width component, bp, found in Equation 6.9. Therefore, in instances where significant debris 6.14 Marana Town Council Regular Meeting Agenda Packet Page 200 of 395 November 19, 2024 (a) Square nose L (d) Sharp nose FIGURE 6.4 COMMON PIER SHAPES VI. EROSION AND SEDIMENTATION (b) Round nose 6.15 (c) Cylinder (e) Group of Cylinders Marana Town Council Regular Meeting Agenda Packet Page 201 of 395 November 19, 2024 VI. EROSION AND SEDIMENTATION transport is anticipated (e.g., within regional watercourses), by should be assumed equal to a width of five feet or 1.5 bp, whichever value is greater. Additionally, pier scour will increase significantly as the direction of flow at the pier becomes more and more skewed in relationship to the pier wall. In such instances, an effective pier width, bpe, can be calculated from the following equation and substituted into Equation 6.9 in lieu of bp. bpe = LsinOp + bpcosOp (6.10) Where: bpe = Effective pier width, in feet; L = Length of pier wall, in feet; Op = Angle of approach flow in relationship to pier wall, in degrees (Op = 0° for cylindrical piers); and, bp = As defined in Equation 6.9. In Equation 6.10, by should incorporate any width increase due to debris, where applicable. Local scour caused by embankments projecting into the flow, such as at bridge abutments, fill projections, and overbank levees, can be computed from the following equation: 0.4 ae Zi.. = 2.15 sin(ea) Y F0•33 Y Where: (6.11) Zise = Local scour depth due to embankment, in feet; ea = Slope angle of abutment face, measured from the horizontal, in degrees; Y = Upstream normal flow depth, in feet; ae = Embankment or encroachment length, measured normal to the edge of the floodplain or channel bank, in feet (see Figure 6.5); and, F. = Upstream Froude number. For33 embankments where the quantity ae/Y is exceedingly large, such that ZIse/YFu > 4.0, the following equation (Richardson et al., 1975) should be used in lieu of Equation 6.11: 0.33 Zi8e = 4YFu (6.12) Equations 6.I1 and 6.12 are based upon relationships developed from both empirical observations and experiments in laboratory flumes. As can be seen from the formulas, the scour depth can be significantly affected by embankment length. In 6.16 Marana Town Council Regular Meeting Agenda Packet Page 202 of 395 November 19, 2024 1 I SCOUR l HOLE- 1 Main Channel Left Overbonk VI. EROSION AND SEDIMENTATION Right Overbank I ,SCOUR HOLE TTT T TT'f aez 1 CASE I Overbank Levee Upstreom depth of ftow,Y,ond Froude number should be bosed on hydraulic conditions for right overbonk flow. CASE ?_ Bridge Embankment Upstream depth of flow,Y, and Froude number should be bosed on hydroulic con— ditions for main channel flow when using ac and overbank flow when use- ing aez. A comparison of scour calculations using these two definitions of embankment length is recommended_ FIGURE 6.5 DEFINITION SKETCH OF EMBANKMENT LENGTH "ae' 6.17 Marana Town Council Regular Meeting Agenda Packet Page 203 of 395 November 19, 2024 VI. EROSION AND SEDIMENTATION practical situations, the embankment may span a wide floodplain overbank and extend partially into the main channel itself. Due to the normally large differences which exist between channel and overbank hydraulics, caution must be exercised in defining the embankment length. Figure 6.5 shows a recommended embankment Length definition for different cases that might be encountered. In the situation where the embankment crosses the entire overbank and extends into the main channel, it is recommended that the scour be computed by utilizing the overbank hydraulics in combination with the embankment length ae2, and that this depth of scour then be compared to the scour depth computed by utilizing the main -channel hydraulics in combination with the embankment length ael. The larger of the two values should then be used for design purposes. 6.6.6 Scour Below Channel Drops Scour below channel drops, such as grade -control structures, is a special case of local scour. Where the drop consists of a free, unsubmerged overfall, the depth of scour below the drop (U.S. Bureau of Reclamation, 1977) shall be computed from: Zlet Where: 1.32 9 0.54 „0.225t w - T (6.13) Z1sf = Depth of local scour due to a free-overfall drop, in feet, measured below the streambed surface downstream of the drop; q = Discharge per unit width of the channel bottom, in cubic feet per second per foot; Ht = Total drop in head, measured from the upstream energy grade line to the downstream energy grade line, in feet; and TW = Tailwater elevation (downstream water -surface elevation), in feet. Figure 6.6 shows the relationship of the parameters in Equation 6.13. Where the drop is submerged, as will be the case for most instances involving grade -control structures placed along watercourses located within the City of Tucson, the depth of scour below the drop (Simons, Li & Associates, 1986) shall be computed from: Z18® = 0.581q°.as7(h/Y)o.4uu-(h/Y)]-0.118 Where: (6.14) h/Y < 0.99; and, Z18e = Depth of local scour due to a submerged drop, in feet, measured below the streambed surface downstream of the drop; q = Discharge per unit width of the channel bottom, in cubic feet per second per foot; h = Drop height, in feet; and, Y = Downstream depth of flow, in feet. 6.18 Marana Town Council Regular Meeting Agenda Packet Page 204 of 395 November 19, 2024 UPSTREAM WATER - SURFACE ELEVATION H FLOW UPSTREAM BED SURFACE h Dew A Ye h vu VI. EROSION AND SEDIMENTATION A Ht Hd DOWNSTREAM ( EQUILIBRIUM ) BED SURFACE 1 Ztsf SCOUR HOLE GRADE -CONTROL STRUCTURE FIGURE 6.6 DEPTH OF SCOUR BELOW A FREE OVERFALL 6.19 TW Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 205 of 395 VI. EROSION AND SEDIMENTATION NOTE: If h/Y > 0.85, the predicted scour below a channel drop should also be computed using Equation 6.13. The smaller of the two values thus computed should then be used for design purposes. Figure 6.7 gives the relationship of the parameters in Equation 6.14. The longitudinal extent of a scour hole created by either a free or submerged overfall is represented by the distances xace and LB, as depicted in Figure 6.7. These dimensions are given by the equations: xace = 6.0 Z1at, or 6.0 Z18e (6.15) L. = 12.0 Z1er, or 12.0 Z18e (6.16) Bank protection toe -downs downstream of a grade -control structure shall extend to the computed depth of scour for a distance equal to xaCe beyond of the grade - control structure, as computed by Equation 6.15. They shall then taper back to the normal toe -down depth within a total distance downstream of the grade -control structure equal to Le, as computed by Equation 6.16. Note that L. includes x9Ce. In the absence of bridge piers and/or abutments, the depth of scour below grade - control structures is not added to the other scour components. Rather, the depth of scour caused by the grade -control structure is compared to the depth of scour computed by Equation 6.3, and the larger of the two values is then used for toe -down design. 6.7 Scour -Hole Geometry at Culvert Outlets Culverts normally have less cross -sectional area available for the conveyance of flow than do the natural channels they replace. Consequently, flow velocities are increased and a potential for erosion is created at the culvert outlet. Often there is a drop at the culvert outlet, either under design conditions or as a result of outlet scour, and this further increases the possibility of outlet scour. The scour hole created at the outlet of a culvert can become large enough to threaten the culvert, the roadway, adjacent property, or other nearby improvements. For non -cohesive soils, the dimensions of a scour hole downstream of a culvert outlet where no drop exists can be computed by: Qr g1/2 D5/2 6.20 (6.17) Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 206 of 395 VI. EROSION AND SEDIMENTATION FLOW —.- i i- i i i r» i i i i i� i I 111 DROP STRUCTURE �_ EQUILIBRIUM BED -SLOPE k (VERTICAL FACE) PROFILE Y FIGURE 6.7 RELATIONSHIP OF VARIABLES IN EQUATION FOR SCOUR BELOW A SUBMERGED GRADE -CONTROL STRUCTURE 6.21 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 207 of 395 VI. EROSION AND SEDIMENTATION Where: Zlsc Wac Lec Yec DSG = Dimensionless scour geometry = D ' D ' D or D , and, Zlb. = Depth of scour hole below culvert, in feet; Wee = Width of scour hole below culvert, in feet; Lai = Length of scour hole below culvert, in feet; V.. = Volume of scour hole below culvert, in cubic feet; D = Culvert diameter, in feet; Qr = Representative discharge, in cubic feet per second; g = Acceleration due to gravity (32.2 ft/sec2); and, a,ae,$,B = Empirically derived coefficients (see Table 6.2). The representative discharge is the average maximum discharge that can be expected to occur within a thirty -minute time period during the storm runoff event which is selected for design. In the City of Tucson, the design discharge is the 100- year flood. The representative discharge is calculated by: Q100 Tr - 10 Qr = 2 1 + Tr Where: Qr = Q100 = Tr = (6.18) Representative discharge, in cubic feet per second; 100-year peak discharge, in cubic feet per second; and, Hydrograph rise time, in minutes (see Chapter IV, Section 4.5, of this Manual). For either non -circular or partially -full culverts, the culvert diameter, D, should be replaced in Equation 6.17 by an equivalent depth, Ye, where Ye is defined as: 0.5 Ye = A Where: A = Cross -sectional area of flow, in square feet. Equation 6.18 is then modified to the following form: 6.22 (6.19) Marana Town Council Regular Meeting Agenda Packet Page 208 of 395 November 19, 2024 VI. EROSION AND SEDIMENTATION TABLE 6.2A: EXPERIMENTAL COEFFICIENTS FOR SCOUR DEPTH, Zlsc, AT CULVERT OUTLETS NOMINAL GRAIN SCOUR MATERIAL SIZE EQUATION COEFFICIENTS Dso (mm) a /3 B ae Uniform Sand 0.20 6.17 or 6.20 2.72 0.375 0.10 2.79 Uniform Sand 2.0 6.17 or 6.20 1.86 0.45 0.09 I.76 Graded Sand 2.0 6.17 or 6.20 1.22 0.85 0.07 0.75 Uniform Gravel 8.0 6.17 or 6.20 1.78 0.45 0.04 1.68 Graded Gravel 8.0 6.17 or 6.20 1.49 0.50 0.03 1.33 Cohesive Sandy Clay: 60% Sand, PI 15 0.15 6.17 or 6.20 1.86 0.57 0.10 1.53 Clay, PI 5-16 Varies 6.22 or 6.23 0.86 0.18 0.10 1.37 6.23 Marana Town Council Regular Meeting Agenda Packet Page 209 of 395 November 19, 2024 VI. EROSION AND SEDIMENTATION TABLE 6.2B: EXPERIMENTAL COEFFICIENTS FOR SCOUR WIDTH, W„, AT CULVERT OUTLETS NOMINAL GRAIN SCOUR MATERIAL SIZE EQUATION COEFFICIENTS D50 (mm) a /3 0 ae Uniform Sand 0.20 6.17 or 6.20 11.73 0.92 0.15 6.44 Uniform Sand 2.0 6.17 or 6.20 8.44 0.57 0.06 6.94 Graded Sand 2.0 6.17 or 6.20 7.25 0.76 0.06 4.78 Uniform Gravel 8.0 6.17 or 6.20 9.13 0.62 0.08 7.08 Graded Gravel 8.0 6.17 or 6.20 8.76 0.89 0.10 4.97 Cohesive Sandy Clav: 60% Sand, PI 15 0.15 6.17 or 6.20 8.63 0.35 0.07 9.14 Clay, PI 5-16 Varies 6.22 or 6.23 3.55 0.17 0.07 5.63 6.24 Marana Town Council Regular Meeting Agenda Packet Page 210 of 395 November 19, 2024 VI. EROSION AND SEDIMENTATION TABLE 6.2C: EXPERIMENTAL COEFFICIENTS FOR SCOUR LENGTH, L.., AT CULVERT OUTLETS NOMINAL GRAIN SCOUR MATERIAL SIZE EQUATION COEFFICIENTS D50 (mm) a /3 8 ae Uniform Sand 0.20 6.17 or 6.20 16.82 0.71 0.125 11.75 Uniform Sand 2.0 6.17 or 6.20 18.28 0.51 0.17 16.10 Graded Sand 2.0 6.17 or 6.20 12.77 0.41 0.04 12.62 Uniform Gravel 8.0 6.17 or 6.20 14.36 0.95 0.12 7.61 Graded Gravel 8.0 6.17 or 6.20 13.09 0.62 0.07 10.15 Cohesive Sandy Clay: 60% Sand, PI 15 0.15 6.17 or 6.20 15.30 0.43 0.09 14.78 Clay, PI 5-16 Varies 6.22 or 6.23 2.82 0.33 0.09 4.48 6.25 Marana Town Council Regular Meeting Agenda Packet Page 211 of 395 November 19, 2024 VI. EROSION AND SEDIMENTATION TABLE 6.2D: EXPERIMENTAL COEFFICIENTS FOR SCOUR VOLUME, Vac, AT CULVERT OUTLETS NOMINAL GRAIN SCOUR MATERIAL SIZE EQUATION COEFFICIENTS D50 (mm) a # B ae Uniform Sand 0.20 6.17 or 6.20 203.36 2.0 0.375 80.71 Uniform Sand 2.0 6.17 or 6.20 101.48 1.41 0.34 79.62 Graded Sand 2.0 6.17 or 6.20 36.17 2.09 0.19 12.94 Uniform Gravel 8.0 6.17 or 6.20 65.91 1.86 0.19 12.15 Graded Gravel 8.0 6.17 or 6.20 42.31 2.28 0.17 32.82 Cohesive Sandy Clay: 60% Sand, PI 15 0.15 6.17 or 6.20 79.73 1.42 0.23 61.84 Clay, PI 5-16 Varies 6.22 or 6.23 0.62 0.93 0.23 2.48 6.26 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 212 of 395 i3 Qr DSG = ae gl/2 Ye 2 (0.09)6 The coefficient ae can also be found in Table 6.2. VI. EROSION AND SEDIMENTATION (6.20) Bed materials are classified in Table 6.2 as being either uniform or graded. Uniform materials are classified as those for which the standard deviation (a) of the grain -size distribution is less than or equal to 1.5. The material is classified as graded if the standard deviation of the grain -size distribution is greater than 1.5. A simple formula often used for computing the standard deviation is: 0.5 D84 a D16 Where: D84 = D16 = (6.21) The grain -size diameter for which 84% of the bed material consists of smaller particles; and The grain -size diameter for which 16% of the bed material consists of smaller particles. The grain -size distribution can be determined by a sieve analysis of the bed material. For planning purposes, or in the absence of a sieve analysis, bed material in the City of Tucson should be classified as graded sand, with a median diameter, D50, equal to one millimeter and a = 4.0. If the soil at the culvert outlet is a sandy clay with a mean grain size in the range of 0.10 to 0.20 mm and a plasticity index, PI, of approximately 15, either Equation 6.17 or 6.20 may be used; where the coefficients for such a soil type are also given in Table 6.2. Equations 6.17 and 6.20 are not applicable to cohesive soils, which have very different properties than the soil types described above. The potential for scour in cohesive soils is related to the critical shear stress of the soils, and is reflected by Equations 6.22 and 6.23. These equations have a wider range of applicability than do the above expressions. These equations are: DSG = a1 19 P Y2 (0.00 rc For circular culverts, and 6.27 (6.22) Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 213 of 395 VI. EROSION AND SEDIMENTATION DSG = a .[—Pl2) (0.09)e (6.23) c For culverts with other shapes. Where: p V2 Modified shear number; re V = Average velocity at outlet, in feet per second; r� = Critical tractive shear stress, in pounds per square foot; and, p = Fluid density, in slugs per cubic foot. All other terms are as previously defined. The critical tractive shear stress is defined as: rc - 0.0001 (S„ + 180) tan (30 + 1.73 PI) Where: S� = Saturated shear strength, in pounds per square inch; and, PI = The plasticity index (limits 5-16). (6.24) Equations 6.17 to 6.24 can therefore be used to estimate the dimensions of the scour hole that would form at the outlet of a culvert for varying types of soils. Figures 6.8 and 6.9 should be used to determine the shape of the scour hole. If the scour hole is large enough to threaten nearby improvements, adjacent property, or the culvert itself, outlet protection will be required to contain and/or prevent erosion. The user is referred to a publication by the Federal Highway Administration (1983) for further information regarding the design of culvert outlet protection. 6.8 Design of Sediment Basins On watercourses with a potential for high sediment discharge, sediment basins may be necessary to protect detention basins, culverts, or storm drains from being filled with sediment. If it is felt that sedimentation could pose a problem for a proposed structure, basins should be built to collect and hold sediment for later removal by maintenance personnel. The design of these basins on watercourses where the upstream watershed area is one square mile, or less, shall be in accordance with the guidelines as presented within Section 3.4 of the Pima County and City of Tucson Stormwater Detention/Retention Manual (1987). 6.28 Marana Town Council Regular Meeting Agenda Packet Page 214 of 395 November 19, 2024 0 0.2 0.4 VI. EROSION AND SEDIMENTATION FLOW Z1sc 0.6 Zlsc(max) 0.8 1.0 iivORIGINAL GROUND LINE 1.2 1 i 1 I 1 1 1 1 I 1 I 1 1 I 1 1 1 1 1 0 O_I 0.2 0.3 0.4 0.5 0-6 0.7 0.8 0.9 1.0 Lsc / l-sc (maxi DIMENSIONLESS CENTER -LINE PROFILE /et/ORIGINAL GROUND LINE 0.2 0.4 Zlsc 0.6 Z1sc (max) 0.8 1.0 1.2 1.0 !4CULVERT I 1 1 1 1 1 1 1 1 1 1 I 1 1 1 1 I i 1 1 0.8 0.6 0.4 0.2 0 0.2 0.4 0.6 Wsc / Wsc (max) 0.8 1 0 DIMENSIONLESS CROSS SECTION AT 0.4 Lsc(mox.) FIGURE 6.8 DIMENSIONLESS SCOUR -HOLE GEOMETRY FOR MAXIMUM TAILWATER 6.29 Marana Town Council Regular Meeting Agenda Packet Page 215 of 395 November 19, 2024 VI. EROSION AND SEDIMENTATION FLOW "t.ORIGINAL GROUND LINE 0.2 0.4 Zlsc 0.6 Z1sc (max.) 0.8 1.0 1.20 0 0.2 0.4 Zlsc 0.6 Zisc (max.) 0.8 1.0 1.2 10 [ 1 1 1 1 1 J 1 1 1 1 1 1 1 1 1 1 1 i 0.1 0.2 0.3 0.4 0.5 0.8 0.6 0.6 0.7 0.8 0.9 1 0 Lec/Lsc(mc .) DIMENSIONLESS CENTER -LINE PROFILE 0.4 a 0 0.2 Wac/Wsc(max) .,lr.ORIGINAL GROUND LINE 0.4 0.6 0.8 DIMENSIONLESS CROSS SECTION AT 0.4 Larnax.) FIGURE 6.9 DIMENSIONLESS SCOUR -HOL E GEOMETRY FOR MINIMUM TAILWATER 6.30 I0 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 216 of 395 VI. EROSION AND SEDIMENTATION On watersheds larger than one square mile, the guidelines cited above may result in overdesign. The design of sediment basins on these watersheds is a more complicated procedure, involving total watershed sediment yield and channel sediment - transport capacity over a range of discharges. Total watershed sediment yield can be estimated by such methods as the Modified Universal Soil Loss Equation (Williams, 1975; and Williams and Berndt, 1977), the Pacific Southwest Inter -Agency Committee (PSIAC) Method (Pacific Southwest Inter -Agency Committee, 1968), the Flaxman Method (Flaxman, 1972), the SCS Method (U.S. Soil Conservation Service, 1971), the Dendy/ Bolton Method (Dendy and Bolton, 1976), and the Renard Method (Renard, 1972). A publication by Renard and Stone (1981) contains a detailed discussion and comparison of some of these methods. The equations for watershed sediment yield which are listed above do not readily distinguish between sediment production that would be classified as wash load and sediment production that would be classified as bed load. Wash load particles are so small that they would generally remain in suspension as the water passes through the detention basin. Therefore, the wash load is not generally to be considered in sediment basin design. An estimate of wash load, as compared to bed load estimated from equations for total watershed sediment yield, can be made by taking samples of the topsoil throughout the watershed. Total watershed sediment production may not be an entirely accurate estimate of the amount of sediment that would be delivered to a certain point, because there is sediment storage within the watershed system. Sediment -volume estimates must therefore also consider the sediment -transport capacity of the channel. A detailed discussion of this type of analysis will not be presented here. However, the reader is referred to publications by the U.S. Army Corps of Engineers (1977), Simons, Li & Associates (1982, 1985), the American Society of Civil Engineers (1977), Simons and Senturk (1977), and Zeller and Fullerton (1983) for more detailed information about performing such analyses. 6.9 Equilibrium Slopes within Constructed Channels Given a fixed size distribution of sediments, the sediment -transport capacity of a stream is dependent primarily upon flow velocity and depth. Within the City of Tucson, transport of all particle sizes of bed material increases, as flow velocity increases, at a rate proportional to approximately the third to fifth power of the velocity. Correspondingly, transport of sediment particles composed of bed material generally decreases as depth increases, while transport increases with decreased depth. However, flow velocity is by far the more important variable. For purposes of analysis and design, most natural, undisturbed channels in the Tucson area can be assumed to be at or near a state of dynamic equilibrium with regard to sediment transport. This means that, for a given reach of the channel, the sediment -transport capacity of the channel, over the long term, is more or less equal to the sediment supply. The channel bed slope is therefore "stable." When channelization occurs, the channel top width is often narrowed, and channel roughness is normally decreased. The result is an increase in velocity and depth, with 6.31 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 217 of 395 VI. EROSION AND SEDIMENTATION a corresponding increase in sediment -transport capacity. Sediment -transport capacity then exceeds the sediment supply; and, if the bed is composed of sediment that can be transported, the deficiency will be made up from bed material --causing the channel to degrade. Another factor that contributes to this degradation is upstream urbanization. Urbanization increases flood peaks, which also lead to higher flow velocities and depths. Urbanization also reduces the watershed sediment supply, and increases the frequency of runoff. The result of all these occurrences is that channel bed degradation will occur until the channel slope is flat enough to cause the sediment - transport rate to be equal to the incoming sediment supply. This slope then becomes the new, "stable," equilibrium slope. Streambed degradation can threaten underground improvements, bank -protection toe -downs, culverts, and other hydraulic structures that are within and/or that cross the channel. Grade -control structures, or lining of the channel bed, are usually required in order to prevent damage caused by streambed degradation. The equilibrium slope for a channel which has an upstream sediment supply that is considered to be essentially zero (e.g., a channel located within a highly urbanized watershed) can be computed from: 2 1.45n `Seq — g0.11 Where: Seq = Equilibrium slope after urbanization, in feet per foot; n — Manning's roughness coefficient; and, q = Channel unit discharge, in cubic feet per second per foot. (6.25) For use with Equation 6.25, channel unit discharge is defined as the channel discharge divided by the channel bottom width. Use of this equation will produce the flattest slope that can be reasonably expected to transport sediment within channels located in the Tucson area. The discharge associated with a 10-year flood is normally chosen when computing the unit discharge for use in Equation 6.25. For lesser degrees of urbanization, the equilibrium slope is computed from Equation 6.26, which is a generalization of the theoretically derived sediment -transport relationships for sandbed channels developed by Zeller and Fullerton (1983): Seq 2 nu Qu,10 l[ nn Qn,10 6.32 b„ bn Sn (6.26) Marana Town Council Regular Meeting Agenda Packet Page 218 of 395 November 19, 2024 VI. EROSION AND SEDIMENTATION Where: nu = Manning's roughness coefficient for an urban channel; nn = Manning's roughness coefficient for a natural or existing channel; Qu io = Ten-year discharge, under urbanized conditions, in cubic feet per second; Qn io = Ten-year or bank -full discharge (whichever is less), under natural conditions, in cubic feet per second; b„ = Bottom width of channel, under urbanized conditions, in feet; bn = Bottom width of channel, under natural conditions, in feet; Rs = Reduction factor for sediment supply. This factor is usually assumed to be equal to the ratio of the impervious area to the total area of the upstream watershed (i.e., 0.0 < Rs < 1.0); and, Sn = Natural or existing channel slope, in feet per foot. The roughness coefficients for natural and urbanized channel beds are often very nearly the same, so the term in which these coefficients appear in Equation 6.26 can usually be assumed equal to the value 1.0. However, from time to time exceptions to this assumption may occur. For instance, when the existing channel is a wide, flat, sheetflow watercourse; and the proposed channel is a narrow, sand -bed channel, nu will ordinarily not be equal to nn. For moderately urbanized to highly urbanized watersheds, the equilibrium slope should be computed by using both Equation 6.25 and Equation 6.26. The steeper of the two computed slopes should then be used for design. The reason for this is that Equation 6.26 can sometimes produce slope values that are too flat to generate reasonable sediment -transport rates for maintenance of channel stability, when impervious cover within a watershed is very high. Equation 6.26 should be used with caution within the City of Tucson. An underlying assumption of this equation is that the existing or natural channel is itself in equilibrium. This is not always true in the City, because most channels have undergone alteration. If there is any question as to whether or not the existing channel is in equilibrium, it is best to try and determine through old (pre -development) aerial photographs and topography what the channel characteristics were in its original, undisturbed (i.e., natural) state. In the absence of historical information about the original channel, an examination may be made of existing stable channels in the area to help estimate what the channel in question may have looked like before urbanization. Equation 6.26 can be used for more than merely the quantification of streambed degradation. It can also be used to determine whether aggradation will occur when a channel is widened beyond existing or natural conditions. Another application would be to use it to design a stable channel cross-section in lieu of installing grade -control structures to otherwise control degradation of the channel bed. 6.33 Marana Town Council Regular Meeting Agenda Packet Page 219 of 395 November 19, 2024 VI. EROSION AND SEDIMENTATION 6.10 Spacing and Depth of Grade -Control Structures If the equilibrium slope of a channel, as determined by use of either Equation 6.25 or Equation 6.26, is flatter than the design slope, grade -control structures may be needed to limit degradation from exceeding a certain depth at any point along the channel. Grade -control structures, sometimes called "cut-off walls" or "check dams," are non -erodible vertical barriers in the channel that prevent the channel bed from degrading at a point located immediately upstream of where they are located. After the channel bed has reached equilibrium, the bed elevation immediately upstream of the grade -control structure is at the design elevation. Downstream of the grade -control structure, the bed is at an "equilibrium" elevation that is lower than the design elevation. For most channels, the design of grade -control structures is an iterative process, involving drop height, reach length, and depth of scour downstream of the drop. Once a drop height is chosen, the reach length, or spacing, between adjacent structures can be computed from: h Lr— Sib - Sec, Where: (6.27) Li. = Reach length, or spacing, between adjacent grade -control structures, in feet; h = Drop height downstream of the grade -control structure, in feet; Sib = Initial channel bed slope, in feet per foot; and, Seq = Channelized equilibrium bed slope, in feet per foot. If the initial and final bed slopes are approximately the same, the distance between grade -control structures will be very large. Under these circumstances, such structures may not be required. Normally, the drop height downstream of a grade -control structure which consists of poured concrete without reinforcements shall not exceed two feet; and preferably should be only one foot, where feasible. For economical and technical reasons, grade - control structures should be spaced no closer together than twelve times the local scour depth below the grade -control structures, as computed by the use of either Equation 6.13 or Equation 6.14. The total height of a cut-off wall or a grade -control structure (Dcw), from top to toe, shall not be less than the drop height plus the computed depth of scour below the wall or structure (see Figure 6.6). The depth of scour below grade -control structures should be computed according to the guidelines presented in Section 6.6.6 of this Manual. For a one -foot -wide, unreinforced concrete cut-off wall, if structural calculations support same, the maximum allowable height of a cut-off wall, from top to toe, can be six feet. If the depth of scour plus the drop height is greater than six feet, the drop shall be considered to be too great for unreinforced concrete cut-off walls, unless a structural analysis can demonstrate otherwise, and the spacing between 6.34 Marana Town Council Regular Meeting Agenda Packet Page 220 of 395 November 19, 2024 VI. EROSION AND SEDIMENTATION the cut-off walls must be reduced. The example which follows (i.e., Example 6.1), illustrates the recommended procedure for cut-off wall design. There will be many design situations, especially when unit discharges are high, where a cut-off wall with a hegith of six feet, from top to toe, is not sufficient. In such cases, a reinforced concrete cut-off wall that has a height greater than six feet, from top to toe, may be used, provided that a structural analysis is submitted showing that the proposed cut-off wall will be structurally stable. If a structural analysis is submitted and approved, the maximum drop height of two feet will no longer apply. Grade -control structures for large discharges need not necessarily be vertical on the downstream side. For structural stability, a triangular or wedge-shaped soil -cement grade -control structure is recommended for use on regional watercourses. However, for hydraulic reasons, the use of any grade -control structure with a face flatter than I:1 on the downstream side shall not be permitted without prior written approval from the City Engineer. EXAMPLE 6.1: SPACING AND DEPTH OF GRADE -CONTROL STRUCTURES A channel in a highly urbanized watershed is to be built to contain the 100-year- flood discharge. The sides of the channel are to be of shotcrete, the bottom of earth. Channel characteristics are as follows: Bottom Width Design Slope Side Slopes Manning's "n" = 20 feet = 0.006 feet/foot = 1:1 = 0.022 Hydraulic characteristics are as follows: Q100 Y100 v 100 4100 = 700 cfs = 3.1 feet = 9.7 fps = 35.0 cfs/foot Qio = 350 cfs 2.1 feet Yio = Vio = 7.7 fps q10 = 17.5 cfs/foot Because the watershed is highly urbanized, Equation 6.25 will be used to compute the equilibrium slope. Therefore: 2 Seq. 1.95 (0.022) = 0.0005 feet/foot. (17.5)0.11 Assume a two -foot drop height. From Equation 6.27, the spacing between grade - control structures should be: 6.35 Marana Town Council Regular Meeting Agenda Packet Page 221 of 395 November 19, 2024 VI. EROSION AND SEDIMENTATION 2.0 Lr (0.006)-(0.0005) = 364 feet. The grade -control structure will be submerged. Using Equation 6.14 yields: Ziss = 0.581 o s67 h Y o 411 1- h Y ° 118 (4100) (/ loo) [ (/ 100)] g100 = 35.0 cfs; Zi88 = 0.581 (35.0)0.667 (0.645)0.411 (0.355)-0.118; so, Zhae = 5.9 feet. Therefore, the total height of the grade -control structure, from top to toe, should be 5.9 feet plus the two -foot drop height; or, 7.9 feet (round to 8.0 feet). However, it is desirable to keep the total vertical dimension of the grade -control structure, from top to toe, equal to or less than six feet. Therefore, a smaller drop height should be used. Using a drop height of one foot yields: Lr _ 1.0 = 182 feet. (0.006)-(0.0005) Z�ae = 0.581 (35.0)0.667 (0.323)0 411(0.677)0.118; so, Z�Bs = 4.10 feet (round to 4.0 ft). Since, in this example, the ultimate drop height at the downstream side of a grade -control structure will be set at one foot, cut-off walls with a height of five feet, from top to toe, could be placed at approximately 180-foot intervals along the bottom of the channel to serve as grade -control structures in order to limit long-term bed degradation to a maximum of one foot anywhere along the subject channel. 6.36 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 222 of 395 CHAPTER VIII: OPEN -CHANNEL DESIGN 8.1 Purpose The purpose of this chapter is to (1) provide the minimum requirements for the hydraulic design of all open channels which fall within the jurisdiction of the City of Tucson (both public and private); (2) provide the additional requirements which must be met before the city will accept a channel for maintenance (public channels); and, (3) provide the design requirements for those new channels which will either be constructed near or discharge directly into natural channels. Because erosion, sedimentation, and channel -stabilization components are also an integral part of any channel design, these topics are discussed in much greater detail in Chapters VI, VII, and IX, of this Manual, respectively. 8.2 Introduction The hydraulic design of drainage channels is not a simple procedure. For a relatively long, straight, and uniform channel, normal -depth (i.e., uniform -flow) calculations can be used to determine the discharge capacity at varying depths for a constant cross -sectional area. However, practicing engineers working in an urban environment will rarely encounter either existing conditions or design conditions where uniform -flow calculations are adequate to totally define the flow conditions associated with a given discharge. Transition sections, channel junctions or confluences, channel bends, and hydraulic structures (e.g., culverts and bridges) can create deviations from uniform -flow conditions. Therefore, the engineer must consider these deviations when designing or analyzing drainage channels. The procedures outlined in this chapter, although not exhaustive, are sufficient for most situations that will be encountered by design engineers. The basic principles behind these design procedures are found in standard textbooks and manuals which deal exclusively with open -channel hydraulics. The design engineer is encouraged to consult the references for this chapter cited at the end of this Manual for a more complete understanding of these principles. Many of the procedures presented herein are particularly similar to those included within the referenced documents prepared by the Los Angeles Flood Control District (1973) and the U.S. Army Corps of Engineers (1970). However, where appropriate, they have been modified to account for Local requirements and regulations. As with the other chapters in this Manual, the procedures outlined herein shall be adhered to unless otherwise stated in the Manual, or unless prior approval to deviate from same is obtained, in writing, from the office of the City Engineer. 8.3 Requirements for Natural Channels Washes which traverse land designated for a proposed development may be left in their natural state provided that doing so would not be in conflict with an approved master drainage plan for the area, if one exists; and provided that the development is adequately protected from flooding and erosion. One method of developing in the vicinity of a natural wash is to keep all structures out of its 100-year floodplain, as well as its attendant erosion -hazard areas. Floodplain delineations and erosion - setback distances are discussed in Chapters V and VII of this Manual. Another 8.01 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 223 of 395 VIII. OPEN -CHANNEL DESIGN possible method of developing in the vicinity of natural washes is to utilize part of the floodplain for development, while leaving the channel in its natural state. However, this approach would involve demonstrating that (1) the encroachment would not adversely affect adjacent properties; that (2) the development would be located outside of any erosion -hazard areas which border the natural wash; and that (3) in certain key areas, as identified by the City and through the 404-permit process, the disturbance to existing riparian vegetation and habitat is minimized. 8.4 Floodplain Encroachments Encroachments into the floodplain of a natural wash are to be analyzed according to the procedures outlined in Chapter V. The City of Tucson "Floodplain Regulations" state that the maximum allowable rise in water -surface elevation for the 100-year discharge shall be one -tenth of a foot. However, if the natural wash is small enough that the entire width of the floodplain is owned or controlled by a single entity or corporation, and there are no existing structures in the floodplain, it is possible that an exception to this rule might be granted by the City. Under these circumstances, the maximum rise in the water -surface elevation would be limited to one foot, as per Federal Emergency Management Agency guidelines. However, as with all floodplain encroachments, the development must be adequately protected from flooding and erosion, and must not violate restrictions imposed by area plans, basin -management plans, or Mayor and Council policies. At no time may an encroachment adversely affect the river's stability or adversely alter flooding conditions on other properties. Although the limit of encroachment under these circumstances is more flexible, it is still subject to review and approval by the City Floodplain Engineer. When encroach- ment is proposed within the floodplain of a watercourse, the City Floodplain Engineer may, at his discretion, request that a detailed study be performed to determine if a reduction in overbank flood storage will significantly affect downstream flood peaks. When fill material is placed in an encroachment area for the purpose of creating a building pad or pads, each pad must be adequately protected against erosion. In cases where these building pads will be placed outside the limits of an erosion -hazard area, as defined in Chapter VII of this Manual, erosion protection shall be designed using the hydraulic parameters associated with the overbank flow. If the building pads will be located inside an erosion -hazard area, erosion protection shall be designed to reduce the erosion -hazard area by using the hydraulic parameters associated with the main channel. See Section 8.5.5 and Chapter VI of this Manual for information on bank -protection toe -down design. In some cases, the City will require that the existing riparian vegetation be pre- served or enhanced. Therefore, it may not be possible to alter a wash or to provide certain types of bank protection, because doing so would result in the loss of significant riparian vegetation. However if, as with most small washes, the riparian vegetation exists only along the banks of the wash, it may be possible to construct erosion protection of some type outside of this vegetation zone. The width of this zone shall be determined on a case -by -case basis, as reviewed and approved by the City Engineer. 8.02 Marana Town Council Regular Meeting Agenda Packet Page 224 of 395 November 19, 2024 VIII. OPEN -CHANNEL DESIGN Individual building sites may encroach into a floodplain under circumstances where the sites would be completely surrounded by floodwaters during a regulatory flood provided that (1) the general requirements of the floodplain ordinance are met; (2) the fill slopes for any building pad or pads are protected from erosion; and (3) all-weather access is provided to all building sites. Erosion protection for the building pads shall be designed using the post - development hydraulic conditions of the overbank floodwaters in the immediate vicinity of the building site. No building shall be built within the erosion -hazard setback limit associated with the main channel, unless adequate bank protection (running the entire length of the development) is first installed to prevent lateral migration of the main channel in the direction of the development. Fill material used to elevate individual building sites must extend at least twenty-five feet away from the building in all directions, unless a study or analysis prepared by an Arizona Registered Professional Civil Engineer demonstrates that a lesser distance is acceptable or that the fill is protected from erosion. In addition, the elevation of the building pad must not be lower than the 100-year water -surface elevation. In all cases, the pad or structure must not worsen flooding on other property. All-weather access in wide floodplains must be along an obvious, commonly used route that can be easily found by drivers of emergency vehicles who may be unfamiliar with the area. Thus, all -weather -access criteria shall apply to the entire all -weather - access route. 8.5 Constructed Channels In many cases, the proposed density of a development will require the use of constructed channels. When such a use is permitted, constructed channels can minimize floodplain widths, thereby maximizing the developable area. However, the increased flow velocities generally associated with constructed channels often mandate that constructed channels be stabilized in order to prevent bed and/or bank erosion. Channelization and lining allows the channel alignment to be modified, to a certain degree, in order to accommodate urban development. Therefore, in most cases in the past, engineers and planners have found it easier, and more economical, to restructure a given parcel using constructed channels than to plan the development around natural channels. However, this policy of channelization has resulted in a significant reduction of riparian vegetation and habitat, as well as other adverse effects such as increased downstream flood peaks and channel erosion. The following discussion provides the basic design criteria for the design of constructed channels. More specific and detailed information can be obtained in the published material cited in the "References and Selected Bibliographies" section found at the end of this Manual. 8.5.1 Channel Geometry Open drainage channels shall be designed using either trapezoidal, rectangular, or compound cross sections, unless the prior approval of an alternate design is granted, in writing, by the City of Tucson Floodplain Engineer. 8.03 Marana Town Council Regular Meeting Agenda Packet Page 225 of 395 November 19, 2024 VIII. OPEN -CHANNEL DESIGN 8.5.1.1 Side -Slopes Side -slopes for constructed earthen or riprap channels shall be no steeper than 3:1, unless an approved soils analysis demonstrates that steeper side -slopes are stable. Side -slopes for lined channels may be steeper, depending upon the structural stability of the lining. Reinforced concrete lining may have vertical side -slopes, provided that the design is adequate to prevent failure from hydrostatic or earth pressures. Shot- crete may be placed on side -slopes as steep as 1:1, if these side -slopes are not significantly steeper than the natural angle of repose of the soil. A soil -cement lining may be placed on 1:1 side -slopes, provided it is of sufficient thickness to be struc- turally stable. The minimum thickness of soil cement on a 1:1 side -slope should be four feet, measured normal to its face. Where soil cement is used as slope paving, with a thickness no greater than one foot, the maximum allowable side -slope should be 4:1. Actually, for ease of construction, even flatter side -slopes (e.g., 6:1) are desirable under such circumstances. 8.5.1.2 Width Ordinarily, the minimum bottom width of a channel must be ten feet before it will be accepted for maintenance by the City of Tucson. Occasionally, bottom widths as narrow as eight feet may be allowable in certain cases, with prior approval from the City of Tucson Floodplain Engineer. Privately maintained channels have no mandatory, minimum bottom width, except as dictated by hydraulic and/or sediment -transport considerations, as described in subsequent sections of this chapter. The bottom width of constructed channels which lack bed and/or bank protection should not vary by more than fifteen percent between control points, such as at culverts, junctions, changes in slope, or abrupt contractions or expansions, except at the confluence of a major tributary. The purpose of this constraint is to prevent severe aggradation, degradation, or bank erosion from occurring due to sudden changes in sediment -transport rates. In addition, when channelizing a natural wash, the bottom width should be constructed so that the discharge per unit width within the engineered channel is approximately equal to the discharge per unit width of the natural channel of the wash. Typical ways to mitigate this latter constraint are (1) to line both the bottom and sides of the engineered channel, or (2) to line just the channel sides and install grade -control structures. The bottom widths of constructed channels which have earthen bottoms should be designed to prevent the formation of an incised, meandering, low -flow channel. Theoretically, a relatively wide channel, designed to convey the 100-year discharge, would convey the more -frequent, low -flow discharges at very shallow depths, were there an equal flow distribution across the entire flow cross section. However, by the laws of nature, such an occurrence is not the case within an alluvial channel. Under such circumstances, the channel will develop a narrow, incised, low -flow channel for more efficient conveyance of these flows. This low -flow channel will often meander within the main channel, and is capable of eroding earthen banks and/or undermining bank protection along engineered channels. In order to avoid this occurrence, the channel either should be stabilized, in order to prevent the formation of an incised low -flow channel, or should be designed so that the following equation is satisfied: 8.04 Marana Town Council Regular Meeting Agenda Packet Page 226 of 395 November 19, 2024 b Vp10017p100 VIII. OPEN -CHANNEL DESIGN < 1.15 (8.1) Where: b = Channel bottom width, in feet; Vp100 = Average velocity of flow at the peak of a 100-year flood, in feet per second; and, Yp100 = Maximum depth of flow at the peak of a 100-year flood, in feet. 8.5.1.3 Depth The depth of flow in channels, where relatively steady, uniform -flow conditions exist, can be computed by an iterative solution of Manning's equation: Q - 1.48b R2/3Sf1zA n Where: Q = Discharge, in cubic feet per second; n = Manning's roughness coefficient (see Table 8.1); R = Hydraulic radius of flow (= A/P), in feet; A = Cross -sectional area of flow, in square feet; P = Wetted perimeter of flow, in feet; and, Sf = Friction slope, in feet per foot. (8.2) The depth of flow in Equation 8.2 is implicit within the terms A and R. To solve for the depth of flow, given a known discharge, the normal procedure is to make an estimate of the depth of flow; compute A, P, and R from the channel cross-section characteristics; then solve for Q using Manning's equation. If the computed discharge is not equal to the known discharge, the depth of flow is adjusted accordingly, and the process is repeated until the computed and known discharges are sufficiently close. Under steady, uniform -flow conditions, the friction slope is assumed equal to the channel slope. Therefore, channel slope can be used for the friction slope, when channels are designed utilizing Manning's Equation. Uniform flow does not exist under most design conditions, due to disturbances caused by changes in the channel width, discharge, or slope. In addition, the presence of channel bends, transitions, junctions, or obstructions such as culverts can create conditions which lead to non -uniform flow. The effect of such disturbances can propagate far upstream, or downstream, depending upon whether or not the flow is subcritical or supercritical. Whenever there is any reason to suspect that uniform -flow conditions do not exist, the depth of flow shall be determined from backwater computations. 8.05 Marana Town Council Regular Meeting Agenda Packet Page 227 of 395 November 19, 2024 VIII. OPEN -CHANNEL DESIGN TABLE 8.1: MANNING'S ROUGHNESS COEFFICIENTS* CHANNEL MATERIAL ROUGHNESS COEFFICIENT (n) Minimum Normal Maximum Corrugated metal Concrete 1) Trowel finish 2) Float finish 3) Unfinished 4) Shotcrete, good section 5) Shotcrete, wavy section Asphalt (use maximum value when cars are present) Soil Cement Riprap (bottom and sides) Constructed channels with earth or sand bottom, sides of 1) Clean earth; straight 2) Earth with grass and weeds 3) Earth with trees and shrubs 4) Shotcrete 5) Soil cement 6) Concrete 7) Dry rubble or riprap Natural channels with sand bottom, sides of 1) Trees and shrubs 2) Rock Natural channel with rock bottom Overbank Floodplains 1) Desert brush, normal density 2) Dense vegetation 0.021 0.011 0.013 0.014 0.0I6 0.018 0.013 0.018 0.018 0.020 0.024 0.018 0.022 0.017 0.023 0.025 0.024 0.040 0.040 0.070 0.025 0.013 0.015 0.017 0.019 0.022 0.016 ** 0.020 0.04D50.is7 0.022 0.025 0.032 0.022 0.025 0.020 0.033 0.035 0.032 0.060 0.060 0 .1 00 0.030 0.015 0.016 0.020 0.023 0.025 0.020 0.025 0.025 0.030 0.040 0.025 0.028 0.024 0.036 0.045 0.040 0.090 0.080 0.160 **Adapted from Chow (1959) and Aldridge and Garrett (1973). D50 in feet. 8.06 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 228 of 395 VIII. OPEN -CHANNEL DESIGN Backwater computations proceed upstream for subcritical flow and downstream for supercritical flow. A control section must be established for computations to begin. A control section is a section at a place of known water -surface elevation. Control sections can be at such places as channel confluences, culvert inlets, or at where the flow goes through critical depth. Critical depth occurs when the Froude number (F) is equal to one. The Froude number is calculated from: F— V (8Yh) 1/2 Where: V = Average velocity of flow, in feet per second; Yh = Hydraulic depth of flow (area/top width), in feet; and, g = Acceleration due to gravity = 32.2 ft/sec2. (8.3) Equation 8.3 should be used with care whenever there is overbank flooding or variations across the cross section which cause the flow velocity to vary within the cross section. In such cases, critical depth should be estimated by the graphical method described in Section 4-4 of Chow (1959). The hydraulic flow depth, Yh, used in the Froude-number calculation represents the actual flow depth for a rectangular section, but represents the cross -sectional area of flow divided by the top width of flow for either trapezoidal sections or natural channel sections. Critical depth can occur at locations where a subcritical channel slope changes to a supercritical slope, and at locations where there is an abrupt drop in the elevation of the channel bed, when subcritical flow exists upstream. Backwater calculations should proceed both upstream and downstream from critical depth at locations where a subcritical slope changes to a supercritical slope. Backwater calculations in trapezoidal channels of uniform cross section are generally performed by the Direct Step Method. This method is easily adaptable to the computer or hand-held calculator. For those who are interested in doing these calculations manually, a very good discussion and description of the Direct Step Method can be found on page 262 of Chow (1959). 8.5.1.4 Freeboard Freeboard is the additional depth required in a channel beyond the depth which is calculated for conveyance of the design discharge. The purpose of freeboard is to protect against hydraulic disturbances such as waves, unforseen obstructions of flow, debris, or sediment accumulation. In addition, freeboard provides a margin of safety against (1) the uncertainties which exist in the methods used to predict design discharges; and (2) floods that are larger than the design flood. The amount of 8.07 Marana Town Council Regular Meeting Agenda Packet Page 229 of 395 November 19, 2024 VIII. OPEN -CHANNEL DESIGN freeboard required depends upon whether the flow is supercritical or subcritical, the flow velocity, the design discharge, the consequences of overtopping, and the mag- nitude of flow disturbances at locations such as junctions and culverts. The freeboard requirement for channels shall be computed from Equation 8.4, with a minimum freeboard of one foot for channels with design depths of three feet or more. FB = 1 /6 Yin. + 2g Where: FB = Freeboard, in feet; Yn,aX = Maximum depth of flow, in feet; V = Average velocity of flow, in feet per second; and, g = Acceleration due to gravity = 32.2 ft/sec2. (8.4) The freeboard requirements described above are for uniform channel reaches where no unusual flow disturbances are anticipated. Additional freeboard is required at channel bends and junctions, where backwater effects may occur; and at locations where hydraulic jumps may occur. The additional freeboard required at channel bends and junctions is described in Sections 8.5.10 and 8.5.12 of this Manual. At those locations where a hydraulic jump could form, additional freeboard shall be provided to contain the jump according to the guidelines provided within Section 8.5.9 of this Manual. Freeboard in regional watercourses, such as the Santa Cruz River, Rillito Creek, Tanque Verde Creek, Pantano Wash, and the Canada del Oro Wash, shall be determined on a case -by -case basis, following a detailed river -mechanics study. The lining of protected channels shall extend to an elevation necessary to include the freeboard requirement, unless approval to the contrary is granted, in writing, by the City of Tucson Floodplain Engineer. 8.5.2 Safely Considerations Deep channels with steep side -slopes and high flow velocities can be a hazard to the health, safety, and welfare of the general public. Therefore, the design engineer must always consider the safety aspects of any design. The design of hazardous channels should be avoided, if possible. All channels greater than five feet deep which have side -slopes steeper than 2:1 shall have emergency escape ladders consisting of a series of iron rungs every 600 feet. Other site -specific safety measures shall be installed as deemed necessary by either the design engineer or the City Engineer. 8.5.3 Right -of -Way All channels that are to be maintained by the City of Tucson must be dedicated to the City. Dedication may be either in fee title or in the form of an easement. The 8.08 Marana Town Council Regular Meeting Agenda Packet Page 230 of 395 November 19, 2024 VIII. OPEN -CHANNEL DESIGN width of the dedication shall be the width of the channel, including key -ins, plus the width of a maintenance access lane or lanes. The minimum maintenance access width for regional watercourses is thirty feet on each side of the channel. More right-of- way may be required, if a linear park is planned along the watercourse. For major watercourses greater than 2000 cfs, the required width for maintenance access is sixteen feet on each side of the channel. However, one of these access lanes may be omitted, at the discretion of the City Engineer, provided that the channel bottom equals or exceeds twenty feet in width, and is drivable utilizing maintenance vehicles. Maintenance access lanes on minor watercourses are variable, and will be established on a case -by -case basis. Generally, a 16-foot maintenance access lane on one side will be required, as a minimum. In all cases, the right-of-way must be sufficient to allow maintenance vehicles to operate freely. In areas where basin -management plans have recommended particular channel alignments, or an alignment for a watercourse has been established by a regulatory agency, dedication shall be in accordance with same. The width of dedication in these areas shall be as recommended in the basin -management plan, or as established by the agency, unless a more recent study shows that an alternative alignment and/or width is adequate. Studies of this type must clearly demonstrate that there are no conflicts or adverse effects with existing upstream and/or downstream improvements. 8.5.4 Bank -Protection Key -Ins and Minor Side Drainage Bank -protection key -ins refer to the additional material , provided beneath the surface of the ground at the top of the bank protection. Key -ins are normally provided for concrete and shotcrete bank protection; for thin, soil -cement bank protection; and for riprap bank protection. Their purpose is (1) to prevent fractures along the upper edge of the bank protection; (2) to provide added structural stability for the bank protection; and (3) to help prevent minor side inflow from undermining and damaging the bank protection from the top. Typical key -ins are shown in Figure 8.1. The minimum key -in depth on major channels (excluding regional watercourses) shall be eighteen inches. On minor watercourses, the key -in depth shall also be eighteen inches, unless a lesser key -in is justifiable. Key -ins for soil -cement bank protection along regional watercourses are generally not required because of the thickness of the bank protection. However, if key -ins are required, the design shall be determined by a site -specific engineering analysis acceptable to the City Engineer. When minor tributary or surface flows enter an unlined channel over its side, rill erosion can create headcuts that will travel away from the channel in the opposite direction of the tributary inflow. If the channel is lined, the side drainage can erode the soil from behind the bank protection and create hydrostatic pressures and seepage problems that can cause failure of the bank protection. Therefore, side drainage must be confined to selected entry points that are adequately protected, or the key -in associated with the lining must be deep enough to prevent, or lessen, the buildup of hydrostatic pressure and seepage behind the bank protection. Under such circumstances, and in the absence of a detailed soils analysis and a knowledge of subsurface flow patterns, the key -in shall extend to a depth that equals the depth of the channel along the tributary inflow area. 8.09 Marana Town Council Regular Meeting Agenda Packet Page 231 of 395 November 19, 2024 VIII. OPEN -CHANNEL DESIGN BANK PROTECT ION BANK PROTECTION 18" min.-0- 8 min. 8"min. �fB1EliF�iBIBIHIk�IB le l E COMPACTED• EARTH GROUND SURFACE GROUND SURFACE FIGURE 8.1 TYPICAL BANK —PROTECTION KEY— INs (NOT TO SCALE) 8.10 Marana Town Council Regular Meeting Agenda Packet Page 232 of 395 November 19, 2024 VIII. OPEN -CHANNEL DESIGN 8.5.5 Bank -Protection Toe -Downs Bank -protection toe -downs refer to the extension of bank protection below the channel bed. Although shallow (i.e., < 6.0 feet) toe -downs are normally vertical, they sometimes are extended below the channel bottom along the same side -slope as the bank itself. The purpose of a toe -down is to prevent failure of the bank protection due to scour or long-term degradation of the channel bed. Bank -protection toe -downs shall extend to the combined depth associated with general scour, bend scour, local scour, low -flow incisement, sand -wave troughs, and long-term degradation predicted to occur within the channel. The procedures used in calculating these depths are presented in Chapter VI of this Manual. Below grade - control structures, the toe -down shall conform to the geometry of the scour hole, as determined by the methodology also presented in Chapter VI of this Manual. The soil beneath the channel bed may contain erosion -resistant material, such as caliche. The scour depth calculated using the methodologies outlined in Chapter VI of this Manual may then become unrealistic. A geotechnical report which demonstrates that the bed is composed of erosion -resistant material may be submitted by a soils engineer to justify a reduction in the toe -down depth. However, the toe -down depth along major washes shall never be less than four feet, nor shall toe -downs along minor washes be less than one-half the depth of flow, unless bedrock is encountered. 8.5.6 Low -Flow and Compound Channels 8.5.6.1 Low -Flow Channels Frequently, the design of a drainage channel that conveys the 100-year discharge leads to a situation in which the bottom of the channel cross section is too wide to efficiently convey the low -flow discharges. As a consequence, these more frequent discharges will create an incised low -flow channel that may meander back and forth across the bed of the channel, instead of allowing flow to spread uniformly across the entire channel width. This meandering process can cause frequent and unnecessary scouring at the toe of the primary banks; and, if left unchecked, can ultimately threaten both the horizontal and vertical stability of the channel. This meander action might even have the capability to destabilize totally lined channels by attacking the lining at the joint between the toe of the bank and the channel bottom. To avoid this meandering process, it is recommended that consideration be given to constructing a small low -flow channel within any larger channel in order to restrict the low flows to a designated area within the primary channel. This low -flow channel should be designed, where practicable, in a manner such that the unit discharge associated with the 2-year event is the same as that which exists under natural conditions. However, practical considerations may require that the low -flow channel, if installed, be somewhat smaller. 8.5.6.2 Compound Channels A variation upon the concept of a constructed low -flow channel is the compound channel. A compound channel contains a significant portion of the design discharge in a stabilized lower channel. A terrace on each side of the stabilization contains the 8.1 I Marana Town Council Regular Meeting Agenda Packet Page 233 of 395 November 19, 2024 VIII. OPEN -CHANNEL DESIGN remainder of the design discharge at a level above the low -flow channel. This terrace may or may not be stabilized. Compound channels are normally constructed in order to satisfy a multi -use concept (e.g., flood -control channels combined with linear parks). The Appendix to this Manual contains more information on the construction of compound channels. When a compound channel is to be constructed within the corporate limits of the City of Tucson, the normal design discharge to be used in the low -flow portion of such a channel should be the 2-year to 10-year discharge. Because of the potential for erosion of a compound channel terrace during a large discharge event, bank protection which consists of a thin shell, or "veneer," over the supporting embankment is not recommended for these channels. However, observations made during major flood events in the Tucson area indicate that 9-foot-thick soil cement will remain in place following extensive removal of the bank material behind it. Therefore, this "massive" type of bank protection is recommended for the banks of a low -flow channel constructed within a compound channel, unless technical evidence can be provided to the City Engineer which clearly demonstrates that an alternate approach will function effectively within such a channel during a large discharge event. Because hydraulic roughness varies over the cross section of a compound channel, the hydraulic roughness must be "weighted" to develop a composite roughness coefficient for determining the correct depth/discharge relationship. Equation 6-18 in Open -Channel Hydraulics (Chow, 1959) is recommended for use in "weighting" roughness coefficients for compound channels. Since compound channels are normally maintenance intensive, they may not be accepted for maintenance by the City .of Tucson. The City Engineer will evaluate the acceptability of these channels on a case -by -case basis. The City Engineer may also increase building setbacks from compound channels over those normally associated with completely lined channels, should the erosion potential of the affected watercourse warrant an increased setback. Figure 8.2 illustrates typical cross sections for low -flow and compound channels. 8.5.7 Upstream and Downstream Controls The upstream end of constructed channels must be designed to collect the entire design discharge without raising water -surface elevations on adjacent properties. This may be accomplished by providing wide entrance transitions, or collector channels, at the upstream end. See Section 8.5.1I.1 of this Manual for information on entrance transitions. The downstream end must also be designed to minimize adverse impacts upon adjacent properties. Adverse impacts could result from increased discharge, velocity, or concentration of flow. Mitigation measures to reduce or eliminate these impacts can be achieved by (1) providing expansions at the downstream end of the channels; (2) providing energy -dissipation structures; or (3) building box culverts at street crossings. See Section 8.5.11.2 of this Manual for information on exit transitions. Drainage must be collected and delivered in the same manner and to the same concentration points that existed prior to channelization, unless a drainage master plan for the area dictates otherwise; or unless an agreement acceptable to the City Engineer 8.12 Marana Town Council Regular Meeting Agenda Packet Page 234 of 395 November 19, 2024 GROUND SURFACE GROUND SURFACE VIII. OPEN -CHANNEL DESIGN �-- BANK STABILIZATION CHANNEL WITH LOW -FLOW CHANNEL (NTS) —8 FOOT —THICK SOIL CEMENT COMPOUND CHANNEL (NTS) FIGURE 8.2 TYPICAL LOW -FLOW AND COMPOUND CHANNELS 8.13 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 235 of 395 VIII. OPEN -CHANNEL DESIGN is obtained from all affected property owners. If a drainage master plan is available, dedication of all necessary rights -of -way shall be required, as specified within the master plan. 8.5.8 Channel Slope The slope for a proposed channel is, to a great extent, dependent on the natural topography. However, variations can be achieved by altering the channel alignment within a development, and by adjusting the elevation of inflow and outflow points. In general, channels with unlined bottoms should not be designed with a slope less than 0.3% in order to prevent vegetation and bed irregularities from creating stagnant pools of water after flows subside. Channels with a concrete bottom may be flatter. Where the natural fall of the land is less than 0.5%, the channel alignment producing the steepest possible slope should be chosen to avoid sediment buildup. Abrupt changes in slope should be avoided, except where necessary to achieve a specific purpose (e.g., such as to induce a hydraulic jump). For example, if an abrupt change in slope might result in the formation of a hydraulic jump that is not desired, an analysis should be performed to determine whether a jump will occur, and where it will be located. When abrupt slope changes are unavoidable, the slope changes should not cause the channel top width to vary by more than fifteen percent. Whenever possible, channels should be designed to convey the incoming sediment supply without causing aggradation or degradation. Refer to Chapter VI of this Manual, which addresses erosion and sedimentation, for more detailed information. Channels with design Froude numbers between 0.86 and 1.16 should be avoided, if at all possible, because of the instability associated with critical flow. Most channels with earthen beds are constructed on slopes that are steeper than their equilibrium slopes. In such cases, grade -control structures are required. Refer to Chapter VI for grade -control design guidelines. 8.5.9 Hydraulic Jump A hydraulic jump occurs when flow changes rapidly from low -stage supercritical flow to high -stage subcritical flow. Hydraulic jumps can occur (1) when the slope of the channel abruptly changes from steep to mild; (2) at sudden expansions or contrac- tions in the channel section; (3) at locations where a barrier, such as a culvert or bridge, occurs in a channel of steep slope; (4) at the downstream side of dip crossings or culverts; (5) where channels of steep slope discharge into other channels; and (6) at sharp bends. Hydraulic jumps are useful in dissipating energy, and consequently they are often purposely forced to occur at drainageway outlet structures in order to minimize the erosive potential of floodwaters. However, because of the large amount of energy dissipated in hydraulic jumps, it is not advisable to allow them to occur except under controlled circumstances. Therefore, if during the design of a channel, it appears that a hydraulic jump might occur at an undesirable location, computations should be made 8.14 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 236 of 395 VIII. OPEN -CHANNEL DESIGN to determine the height, length, and characteristics of the jump. In addition, steps should be taken to either eliminate the jump or contain it, in order to prevent damage to the channel or surrounding property. The type of hydraulic jump that forms, and the amount of energy it dissipates, is dependent upon the upstream Froude number, F1. The various types of hydraulic jumps that can occur are listed in Table 8.2. TABLE 8.2: TYPES OF HYDRAULIC JUMPS UPSTREAM FROUDE NUMBER TYPE OF JUMP ENERGY LOSS (%) 1 < F1 < 1.7 1.7 < F1 < 2.5 2.5 < Fl < 4.5 4.5 < Fl < 9 F1 > 9 Undular Jump Weak Jump Oscillating Jump Steady Jump Strong Jump 0-5 5-18 18-44 44-70 70-85 8.5.9.1 Height of a Hydraulic Jump The depth of flow immediately downstream of a hydraulic jump is referred to as the sequent depth. The sequent depth in rectangular channels can be computed by use of the following equation: Y2 = I/2 Y1 ([1 + 8F2i]1/2-1) (8.5) Where: Yl = Initial (upstream) flow depth, in feet; Y2 = Sequent (downstream) flow depth, in feet; and, F1 = Froude number upstream of the jump = V1/(gY1)°'5, where V1 = initial (upstream) flow velocity, in feet per second. 8.15 Marana Town Council Regular Meeting Agenda Packet Page 237 of 395 November 19, 2024 VIII. OPEN -CHANNEL DESIGN The solution for sequent depth in trapezoidal channels can be obtained from a trial -and -error solution of Equation 8.6. Equation 8.6 is derived from momentum equations (see Morris and Wiggert, 1972). It is also acceptable, for design purposes, to determine the sequent depth in trapezoidal channels from Equation 8.5. Equation 8.5 is much simpler to solve, and produces only slightly greater values for sequent depth for trapezoidal channels than does Equation 8.6. ZYx bYi 22 ZYa bY22 Q2 3 + 2 + gA1 3 + 2 + gA2 Where: Yl & Y2 are as defined in Equation 8.5; and, b = Channel bottom width, in feet; Z = Channel side -slope (horizontal/vertical), in feet per foot; Q = Channel discharge, in cubic feet per second; and, Ai & A2 = Cross -sectional areas of flow upstream and downstream, respectively, of the hydraulic jump, in square feet. Figures 8.3 and 8.4 can also be used to determine the height of a hydraulic jump. 8.5.9.2 Length of a Hydraulic Jump (8.6) The length of a hydraulic jump, L, is defined as the distance from the front face of the jump to a point immediately downstream of the roller. Jump length can be determined from Figures 8.5 and 8.6. 8.5.9.3 Surface Profile of a Hydraulic Jump The surface profile of a hydraulic jump may be needed to design the profile of extra bank protection, or training walls, required to contain the jump. The surface profile can be determined from Figure 8.7. 8.5.9.4 Location of a Hydraulic Jump In most cases, a hydraulic jump will occur at the location in a channel where the initial and sequent depths and upstream Froude number satisfy Equation 8.5. This location can be found by performing direct -step calculations in either direction toward the suspected jump location, until the terms of the equation are satisfied. Refer to Section 15.7 of Chow (1959) for detailed information and an example on locating hydraulic jumps. 8.5.9.5 Undular Hydraulic Jumps An undular hydraulic jump is the type of jump which occurs where the upstream Froude number is between 1.0 and 1.7. This type of jump is characterized by a series of undular waves which form on the downstream side of the jump. Experiments have shown that the first wave of an undular jump is higher than the height given by Equation 8.5. Therefore, the height of this wave should be determined as follows: 8.16 Marana Town Council Regular Meeting Agenda Packet Page 238 of 395 November 19, 2024 VIII. OPEN -CHANNEL DESIGN O O N tO 0 O RECTANGULAR 0 O N Y2 Yi 0 to a O m a N FIGURE 8.3 HEIGHT OF A HYDRAULIC JUMP FOR A HORIZONTAL, RECTANGULAR CHANNEL 8.17 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 239 of 395 Y2 Yl VIII. OPEN -CHANNEL DESIGN TRAPEZOIDAL (Using Hydraulic Depth) I 1\ c9-vt O j') i 1\\\S \\ It '%.� Cr FIGURE 8.4 HEIGHT OF A HYDRAULIC JUMP FOR A HORIZONTAL, TRAPEZOIDAL CHANNEL (USING HYDRAULIC DEPTH) En co up L+ ti 8.18 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 240 of 395 VIII. OPEN -CHANNEL DESIGN O C- O O O (D O O N O O O O) L YI O 0, O r` O O O O � N O O O N O N CO cD co N O FIGURE 8.5 LENGTH OF A HYDRAULIC JUMP FOR A RECTANGULAR CHANNEL 8.19 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 241 of 395 VIII. OPEN -CHANNEL DESIGN 1000 500 100 50 5 I t ZYI Z=SIDE SLOPE TRAPEZOIDAL f=4,Z=2 t=B,Z=I f' I6,Z=!/2 PARABOLIC TRIANGULAR D0 NOT EXTRAPOLATE 0I F 10 100 FIGURE 8.6 LENGTH OF A HYDRAULIC JUMP FOR NONRECTANGULAR CHANNELS 8.20 Marana Town Council Regular Meeting Agenda Packet Page 242 of 395 November 19, 2024 r h� 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.I 0 VIII. OPEN -CHANNEL DESIGN F P1�� =1.98 F1 =2.92 Fi =4.09 F1 =5.53 F1 =8.63 I_V �''. . 71 2 3 4 FIGURE 8.7 SURFACE PROFILE OF A HYDRAULIC JUMP 8.21 5 6 7 8 Marana Town Council Regular Meeting Agenda Packet Page 243 of 395 November 19, 2024 VIII. OPEN -CHANNEL DESIGN Y2—Y1 Y1 2 =F1-1 Where all terms are as previously described. See U.S. Army Corps of Engineers (1970) for the source of this equation. 8.5.10 Flow in a Curved Channel (8.7) Flow in a curved channel will create centrifugal forces which will cause a rise in the water surface along the outside of a bend. At the same time, a corresponding depression will be created in the water surface along the inside of the bend. In addition, spiral secondary currents tend to form within the bends. These currents can cause scour to occur along the outside of a bend, and deposition along the inside of a bend. Cross waves that propagate downstream will also form, if the flow around the bend is supercritical. Although curves are inevitable in the design of most open channels, they should be minimized in order to avoid the special problems associated with their design. The design of channel bends must include consideration for superelevation, limiting curva- ture, bend scour, and special design curves. 8.5.10.1 Superelevation Superelevation is the rise in the water -surface elevation around the outside of a channel bend, with an accompanying lowering of the water surface along the inside of the bend. This outside rise in the water surface is generally measured with respect to the mean depth of flow in an equivalent straight reach. Additional freeboard is required along the outside of a channel bend to account for this rise (see Figure 8.8). Superelevation is computed as follows: AY — 1.5CV2T grc Where: (8.8) AY = Rise in water -surface elevation (superelevation) around the outside of a channel bend, in feet; C = A coefficient (see Table 8.3); V = Average velocity of flow, in feet per second; T = Channel width at elevation of water sulfa?, in feet; g = Acceleration due to gravity (= 32.2 ft/sec ); rc = Radius of curvature of channel centerline, in feet; and, 1.5 = Factor of safety to account for alluvial channel conditions. See U.S. Army Corps of Engineers (1970) for the source of this equation. 8.22 Marana Town Council Regular Meeting Agenda Packet Page 244 of 395 November 19, 2024 AyI VIII. OPEN -CHANNEL DESIGN A A' FIGURE 8.8 CROSS -WAVE PATTERN FOR SUPERCRITICAL FLOW IN A CURVED CHANNEL 8.23 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 245 of 395 VIII. OPEN -CHANNEL DESIGN The coefficient C in Equation 8.8 takes into account the rise due to cross waves and centrifugal forces. TABLE 8.3: COEFFICIENTS FOR USE IN SUPER - ELEVATION FORMULA FLOW TYPE CROSS SECTION TYPE OF CURVE VALUE OF C Tranquil Tranquil Rapid Rapid Rapid Rapid Rectangular Trapezoidal Rectangular Trapezoidal Rectangular Trapezoidal Simple Circular Simple Circular Simple Circular Simple Circular Easement Transition Easement Transition 0.5 0.5 1.0 1.0 0.5 1.0 For subcritical flow, the upstream and downstream limits of additional freeboard shall correspond to the beginning and ending points of curvature according to the guidelines in U.S. Army Corps of Engineers (1970). The normal channel freeboard is expected to be adequate to contain any backwater effects of the superelevation upstream of the curve. For supercritical flow, the disturbances caused by bends (cross waves) can propagate far downstream of the bend. Therefore, special treatment is required to eliminate or minimize these disturbances. Figure 8.8 shows a typical cross -wave pattern. The central angle of the cross -wave pattern, B, is computed by use of the following equation: 6 = tan-1 2b [(2r+b)tanf3 8.24 (8.9) Marana Town Council Regular Meeting Agenda Packet Page 246 of 395 November 19, 2024 VIII. OPEN -CHANNEL DESIGN Where: 0 = Central angle of the cross -wave pattern, in degrees; b = Channel bottom width, in feet; re = Radius of curvature of_clhannel centerline, in feet; /3 = Wave front angle = Sin (1/F), in degrees; and, F = Froude number. See Rouse (1950) for the source of this equation. Freeboard to account for superelevation in channels with supercritical flow shall begin at the upstream point of curvature, and continue at that level to a point downstream of the end of the curve a distance computed by Equation 8.10. 3T L' _ (8.10) Tan $ Where: L' = Distance of maximum superelevation downstream of a curve in a channel with supercritical flow, in feet. All other terms are as defined previously. Beyond this point, freeboard to account for superelevation shall taper downward to the normal bank -protection height over an additional distance equal to 0.67L'. 8.5.10.2 Easement Curves Easement curves can be used to reduce cross waves in bends with supercritical flow (see Table 8.3). Easement curves are placed at both ends of the curve proper, and may be either spiral or circular in order to produce the same hydraulic effect. Circular easement curves are recommended, and must have a radius equal to twice the radius of the main curve. The length of the easement curve, Le, is computed by: L. _ 0.32 TV Y1I2 Where all terms are as previously described. 8.5.10.3 Banking (8.11) Banking is an alternative to providing additional freeboard in order to contain superelevated flows around a channel bend. Banking is a modification of the cross slope of the channel bed such that the inside of the bend is lower than the outside of 8.25 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 247 of 395 VIII. OPEN -CHANNEL DESIGN the bend. When banking a channel, the difference in elevation between the inside of a bend (lowest point) and the outside of a bend (highest point) should be equal to the quantity V2T/grc, in feet, where all terms are as previously defined. Hydraulically, this method is preferable to providing additional freeboard, but banking is difficult to construct. Therefore, banking should only be used in conjunction with the design of totally lined channels. 8.5.10.4 Limiting Curvature For flow with a design Froude number less than 0.86, the minimum radius of curvature along the center line of the channel shall be three times the channel top width. For flow with a Froude number greater than or equal to 0.86, the minimum radius of curvature shall be computed as follows: 4V2T rr ` gYh Where: r, = Radius of curvature of channel centerline, in feet; V = Average velocity of flow, in feet per second; T = Channel top width at the water surface, in feet; and, Yh = Hydraulic depth of flow, in feet. See U.S. Army Corps of Engineers (1970) for the source of this equation. (8.12) The radius of curvature for channels with design Froude numbers greater than or equal to 0.86 shall not be less than 4T. 8.5.11 Transitions Transition sections designed to collect and/or discharge flow between the natural floodplain and constructed channels can be located at either the upstream or downstream ends of the constructed channels. They can also be located along a segment, or segments, of a constructed channel itself. In either case, it is necessary to design the flow transition to minimize the disturbance to flow. In the case where flow in a constructed channel is being transitioned back to the natural floodplain, sufficient distance must be allowed for the flow to adequately expand to the original width of the natural floodplain. 8.5.11.1 Entrance Transitions When the upstream width of flow in a natural channel exceeds the width of proposed channel, a transition section must be provided. For subcritical flow, the angle of convergence, B, between the center line of the proposed channel and the transitioning levee, or bank, is computed by use of the following equation: B = tan-1 1 3.375 Fu 8.26 (8.13) Marana Town Council Regular Meeting Agenda Packet Page 248 of 395 November 19, 2024 VIII. OPEN -CHANNEL DESIGN Where: B = Transition angle, in degrees (see Figure 8.9); and, F„ = Upstream Froude number. See Pima County Department of Transportation and Flood Control District (1984) for the source of this equation. The length, L, of the transition is computed by use of the following equation: L = AT 2tan9 Where AT is the change in top width, in feet. See U.S. Army Corps of Engineers (1970) for the source of this equation. (8.14) The maximum allowable transition angle is thirty degrees, unless supplemental engineering calculations demonstrate to the satisfaction of the City Engineer that an angle greater than thirty degrees can be used. In addition to the design calculations associated with the transition section, a backwater analysis must be performed to determine what effect, if any, the transition will have upon upstream water levels. The transition losses, ht, to be used in the backwater analysis are to be computed by use of the following equation: or h„ = C,OhY (8.15a) hte = CeOh„ (8.156) Where: htc, hte = Transition losses in contracting and expanding reaches, respectively, in feet; C� = Coefficient of contraction; Ce = Coefficient of expansion; and, Ah„ = Difference in velocity head between the upstream and downstream end of the transition, in feet. See U.S. Army Corps of Engineers (1970) for the source of this equation. The head -loss coefficients of expansion and contraction, C, and Ce, are obtained from the following table: 8.27 Marana Town Council Regular Meeting Agenda Packet Page 249 of 395 November 19, 2024 VIII. OPEN -CHANNEL DESIGN L,j Lm 1• Lt NOTE: The subscripts u, m, and d represent upstream, midpoint, and downstream flow conditions, respectively. FIGURE 8.9 TRANSITION FOR CHANNEL CONTRACTIONS IN SUPERCRITICAL FLOW 8.28 Marana Town Council Regular Meeting Agenda Packet Page 250 of 395 November 19, 2024 VIII. OPEN -CHANNEL DESIGN TABLE 8.4: HEAD -LOSS COEFFICIENTS FOR USE WITH TRANSITIONS IN OPEN CHANNELS TRANSITION TYPE Cc Ce Warped 0.10 0.20 Cylindrical quadrant 0.15 0.25 Wedge 0.30 0.50 Straight Line 0.30 0.50 Square End 0.30 0.75 For supercritical flow, entrance transitions must be designed to prevent flow disturbances which could propagate downstream. The convergence angle, 6 (Figure 8.9), must be chosen to minimize cross -wave action. To accomplish this, the following three equations must also be satisfied: and, and, (1) L1 (2) L2 b1 — 1Tanp1 ' b2 2Tan(92-0) ' (8.16) (8.17) (3) L = L1 + L2 (8.18) (4) L bl - b2 2 tan() Where all terms are as defined in Figure 8.9. See U.S. Army Corps of Engineers (1970) for the source of these equations. 8.29 (8.19) Marana Town Council Regular Meeting Agenda Packet Page 251 of 395 November 19, 2024 VIII. OPEN -CHANNEL DESIGN The procedure for design of a supercritical transition is as follows: 1. Using the upstream Froude number, Fu, compute the wave -front angle, from the formula: !3 = Sin-1(1/F) Where: # = #1 and F = Fu (see Figure 8.9). 2. Compute the distance L1 from Equation 8.16. 3. Choose a trial transition length, L, where L > L1. 4. Determine the trial transition angle, 6, from L, b1, and b2. #11 (8.20) 5. Determine the transition Froude number, Ft, from the hydraulic conditions at the distance L1. 6. From Ft, compute a new wave -front angle, 132, using Equation 8.20. 7. Compute L2 according to Equation 8.17. 8. Repeat steps 3 through 7 until Equations 8.18 and 8.19 are both satisfied. The table below is provided as an additional guide to aid in designing entrance transitions under supercritical flow conditions. TABLE 8.5: RECOMMENDED CONVERGENCE RATES FOR ENTRANCE TRANSITIONS WITH SUPERCRITICAL FLOW MEAN CHANNEL VELOCITY (FPS) WALLFLARE (HORIZONTAL TO LONGITUDINAL) 6 DEGREES 10 - 15 15 - 30 30 - 40 1:10 1:15 1:20 5.71 3.81 2.86 8.30 Marana Town Council Regular Meeting Agenda Packet Page 252 of 395 November 19, 2024 VIII. OPEN -CHANNEL DESIGN 8.5.11.2 Exit Transitions The length of the exiting transition section, LTR, where flow from the proposed channel is expanded to match the width of the natural floodplain, shall be computed by use of the following equation: LTR = 6.5 (X2 - 0.7X1) (8.21) for subcritical flow (F„ < 1); and LTR = 6.5 F. (X2 - 0.7X1) (8.22) for supercritical flow (F„ > 1). Where the terms for both equations are as described in Figure 8.10 (F„ _ upstream Froude number). Equations 8.21 and 8.22 are modified from equations found on Plate 24 of "Hydraulic Design of Flood Control Channels," U.S. Army Corps of Engineers (1970). Exit transition sections are necessary to prevent adverse downstream impacts caused by increased flow velocities and depths. Acceptable transitions are required in all cases unless (1) an agreement, satisfactory to the City Engineer, can be made with all affected downstream property owners; or (2) a drainage master plan has been developed for the wash, which specifies a particular outlet configuration. 8.5.11.3 Internal Channel Transitions Internal channel transitions must be gradual" to- minimize flow disturbances. The same formulas presented in the previous sections for entrance and exit transitions shall be used for contractions and expansions of flow within the channel. For transitions which constrict flow under subcritical conditions, use Equation 8.13 to determine the convergence angle. The maximum transition angle shall be thirty degrees. The length of the transition is computed by using Equation 8.14. Contractions under supercritical flow conditions are computed by using Equations 8.16 through 8.20. The required length for internal expansions under supercritical flow conditions is computed by using Equation 8.22. Should a shorter transition be desired, it must be justified by computations that document the expected wave heights in accordance with procedures contained in standard hydraulics textbooks, such as Chow (1959) and Morris and Wiggert (1972). Additional freeboard, and possibly additional reinforcement of the channel lining, will be required to account for the destructive effects associated with wave formation. 8.31 Marana Town Council Regular Meeting Agenda Packet Page 253 of 395 November 19, 2024 VIII. OPEN -CHANNEL DESIGN Constructed Channel x1 Flow i c_ IF u L TR NLiaturalmit Floodplain —0 Property Boundary FIGURE 8.10 TRANSITION DISTANCE REQUIRED TO ALLOW FLOW TO RETURN TO NATURAL CONDITIONS 8.32 Marana Town Council Regular Meeting Agenda Packet Page 254 of 395 November 19, 2024 VIII. OPEN -CHANNEL DESIGN Where flow is to be transitioned from a supercritical state to a subcritical state, a hydraulic jump will develop. The jump must be contained within the transition structure. Additional freeboard will be required, as needed, to contain the jump (refer to Section 8.5.12 of this Manual for information on hydraulic jumps). Additional reinforcement of the channel lining may also be required. One method of ensuring that a hydraulic jump is contained within the designated area is to build an energy dissipator or stilling basin that is designed to contain the jump within a specified reach length. Refer to Chapter IX of this Manual for more detailed information concerning energy dissipators and/or stilling basins. 8.5.12 Channel Confluences The design of a channel junction or a channel confluence is a very complex procedure due to the many variables involved (e.g., the angle of intersection, dis- charges, channel and junction shape, and the number of adjoining channels and type of flow encountered). Junctions under subcritical flow conditions must be designed to allow water to merge without creating a backwater condition that can result in the overtopping of one or more of the converging channels. The maximum wave height is generally located on the side -channel wall opposite the junction point, and on the main -channel wall downstream of the junction. 8.5.12.1 General Design Guidelines General design guidelines for junctions are as follows: 1. Tapered training walls should be constructed between adjoining flows. 2. The side -channel wave originating at the junction apex should impinge upon the main -channel wall downstream of the enlargement (see Section 8.5.12.3 of this Manual). 3. Junction angles, 0, should be no greater than twelve degrees for subcritical flow, and no greater than six degrees for supercritical flow. Angles greater than these are acceptable, but only if extra bank protection is provided to heights equal to or greater than the maximum wave heights given by Figure 8.11. In addition, if the tributary flow is greater than ten percent of the main channel flow, the maximum angle of the confluence should not be allowed to exceed forty-five degrees. The extra height of bank protection required at a junction should extend downstream of same a distance, L, which is computed from the following equation: 3b2V2 L V3sin0 (8.23) Where: b2 = Bottom width of the main channel downstream of the junction, in feet; 8.33 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 255 of 395 VIII. OPEN -CHANNEL DESIGN MAXIMUM WAVE HEIGHT 6 5 4 3 2 I I 2 Fs 3 4 MAXIMUM WAVE 6 5 3 2 I // / / 0 ph/ // / / O \�o e'- /! // // / / // /r / // / ip /1 / �1 2 Fm 3 NOTE: The subscripts m and s represent the main channel and side channel flow conditions, respectively. 0 F= s Qi=O \ / \ /' vs MAIN CHANNEL 01, Vi, ri 4 MAIN CHANNEL o. SIDE CHANNEL FLOW ONLY b. MAIN CHANNEL FLOW ONLY ---- RECTANGULAR CHANNEL TRAPEZOIDAL CHANNEL —•APPROXIMATE FLOW LINE PATTERN FOR DESIGN PURPOSES A SHOULD NOT BE GREATER THAN 12 °FOR SUBCRITICAL FLOWS, AND NOT GREATER THAN6°FOR SUPERCRITICAL FLOW. FIGURE 8.11 MAXIMUM WAVE HEIGHT AT A CHANNEL JUNCTION 8.34 Marana Town Council Regular Meeting Agenda Packet Page 256 of 395 November 19, 2024 VIII. OPEN -CHANNEL DESIGN V2 = Flow velocity in the main channel downstream of the junction, in feet per second; V3 = Flow velocity in the tributary or side channel, in feet per second; and, 0 = Junction angle, in degrees. Tributary flows that are less than ten percent of the main channel flow may enter at angles up to ninety degrees, but only if extra bank protection is provided to a height that equals the elevation of the energy grade line of the tributary flow. If the angle of confluence is greater than forty-five degrees, the extra bank protection must extend upstream of the junction at least for a distance equal to the bottom width of the tributary channel. 4. Critical flow conditions at junctions should be avoided, if at all possible. Froude numbers should either be below the value 0.86, or greater than the value 1.13. 5. Transition sections should be avoided in the immediate vicinity of junctions. 8.5.12.2 Momentum Equation Open -channel flow at a junction is best analyzed using the principle of conserva- tion of momentum. There are many momentum -balance equations available that make simplifying assumptions about the flow and confluence configuration. These equations should be used with caution, because many design situations will not adequately meet the assumptions implicit in these equations. A series of equations developed by the are of sufficient detail to be applicable for used for designing projects to be located engineer can justify using other equations. equation is: Los Angeles Flood Control District (1973) most junctions. These equations shall be within the City of Tucson, unless the The general form of the momentum Ph2 + M2 = Ph1 + M1 + M3COs0 + Phi + Phw — Pht Where: Ph1 Ph2 Phi Phw Phf M1 (8.24) Hydrostatic pressure on Section 1; • Hydrostatic pressure on Section 2; Horizontal component of hydrostatic pressure on the channel invert; • Axial component of hydrostatic pressure on the channel walls; = Retardation force of friction; = Momentum of the moving mass of water entering the junction at Section 1; 8.35 Marana Town Council Regular Meeting Agenda Packet Page 257 of 395 November 19, 2024 VIII. OPEN -CHANNEL DESIGN M2 = Momentum of moving mass of water leaving the junction at Section 2; and, M3Cos9 = Axial component of momentum of the moving mass of water entering the junction at Section 3. Figures 8.12 and 8.13 show the relationship between the main channel and the tributary channel with respect to the preceding equation. For a trapezoidal channel, the following equations represent the variables comprising Equation 8.24: Q21 Qi Mi g(b1+Z1Y1)Y1 gAi (8.25) QZ QZ M = = (8.26) 2 g(b2+Z2Y2)Y2 gA2 Q3 Q3 M3 g(b3+Z3Y3)Y3 gA3 Y21 Phi = 6 (3bi + 2Z1Y1) Y2 2 Pd2 = 6 (3b2 + 2Z2Y2) Phi -- Phw = Phf — bi+b2 (Y2-Y1)(b1+2b2) 2 hd Y1 + 3(bi+b2) (8.27) (8.28) (8.29) (8.30) Y14Y2 I b12 2 (Y1-Y2)+h'(Z1Y1+Z2Y2)+(b2+Z2Y2)Y2-( bi+Z1Yi)Yl (8.31) L(S1+S2) 4 (bi + Z1Yi)Yi + (b2+Z2Y2)Y2 (8.32) 8.36 Marana Town Council Regular Meeting Agenda Packet Page 258 of 395 November 19, 2024 t Y1 4 /� / ha VIII. OPEN -CHANNEL DESIGN 0 L-9.1 I I i o, 1 b, I l'Ac /043 y / 4'D 1 ke FIGURE 8.12 RECTANGULAR CHANNEL JUNCTION 8.37 Marana Town Council Regular Meeting Agenda Packet Page 259 of 395 November 19, 2024 VIII. OPEN -CHANNEL DESIGN Yr L I hd b, / 0-3 b2 h' 4 YI Yz hd I I 1 FIGURE 8.13 TRAPEZOIDAL CHANNEL JUNCTION 8.38 r Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 260 of 395 VIII. OPEN -CHANNEL DESIGN For a rectangular channel, the equations which represent the variables comprising Equation 8.24 are: Q1 M1= gb1Y1 222 M2 - gb2Y2 Q3 1113 gb3Y3 b1Yi Phl = 2 b2Ya2 Ph2 = 2 [bil-b21 Phi = hd 2 Phw Phf = Where: (Y2-Y1)(b1+2b2) 3(b +b2) 1 + 1 Y1+Y2 (Y2-Y1)(I'1+2Y2) 4 (b2-b1) Y1 + 3(Y 1+Y 2) L(S1+S2) 4 (8.33) (8.34) (8.35) (8.36) (8.37) (8.38) (8.39) (b1Y1+b2Y2) (8.40) b1, b2, b3 = Bottom widths of channels 1, 2, and 3, respectively, in feet; Y1, Y2, Y3 = Flow depths in channels 1, 2, and 3, respectively, in feet; Q1, Q2, Q3 = Discharges in channels 1, 2, and 3, respectively, in cubic feet per second; Z1, Z2, Z3 = Side -slopes of channels 1, 2, and 3, respectively (hori- zontal/vertical), in feet per foot; Si, S2 = Friction slopes of channels 1 and 2, respectively. L = Length of channel junction, in feet. 8.39 Marana Town Council Regular Meeting Agenda Packet Page 261 of 395 November 19, 2024 VIII. OPEN -CHANNEL DESIGN ha h' = Vertical drop in channel bottom through the junction, in feet; and, = Vertical drop in water surface through the junction, in feet. 8.5.12.3 Design Procedure: Supercritical Flow The design of junctions under supercritical flow conditions involves an iterative procedure in which different curve layouts are checked against the momentum equation until one is found that is acceptable. The upstream channel widths and hydraulic conditions are known, while the downstream channel width and depth of flow are the unknown parameters. The procedure is as follows: 1. Assume a downstream width of the channel bottom based upon the total discharge, the approximate channel shape, the selected roughness, and the slope. It is suggested that the first estimate of the width be the combined width of the two upstream channels (br+b3). (In the following discussion bl refers to the upstream width of the main channel, by is the width of the main channel at the downstream end of the junction, b3 is the width of the secondary [tributary] channel, and b4 is the width of the main channel downstream and beyond the influence of the junction). 2. Prepare the confluence layout assuming that the main -channel walls are parallel to the channel center line, as shown in Figure 8.14. If the difference (AN) in widths between b1 and by is less than bs, a centerline offset, as shown in Figure 8.14 A, is recommended. If Obl is greater than b3, an offset with respect to the right bank, as shown in Figure 8.14 B, is recommended to ensure that the horizontal distance between the parallel alignment of the left banks of the main channels bl and by is equal to or less than b3. 3. Using the point of intersection, PI, of the channel walls, draw a circular curve which is determined by the apex angle, B (Figure 8.14). The radius of curvature of the curve is determined by use of the following equation: 41gb3 r` gY3 + 400 (8.41) Where all terms are as previously defined. See U.S. Army Corps of Engineers (1970) for the source of this equation. This curve will connect the intersecting, straight channel walls, as shown in Figure 8.14, and will represent the revised edge of the bottom of the channel through the confluence area. 8.40 Marana Town Council Regular Meeting Agenda Packet Page 262 of 395 November 19, 2024 CONFLUENCE LENGTH TRANSITION LENGTH o, CENTER -LINE OFFSET DESIGN (CONFLUENCE LENGTH TRANSITION LENGTH b. SIDEWALL OFFSET DESIGN FIGURE 8.14 TYPICAL CONFLUENCE LAYOUTS *FOR DESIGN PURPDS£S,e SHOULD BE NOT GREATER THAN 12 DEGREES FOR SUBCRIT1CAL FLOW AND NOT GREAT- ER THAN 6 DEGREES FOR SUPER— CRITICAL FLOW, PIOIS1Q latsitMiVHD-Madc Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 263 of 395 VIII. OPEN -CHANNEL DESIGN 4. Make the inside bank of the tributary channel bottom concentric with the circular curve, and locate the apex of the junction at the point where this edge of the tributary channel meets the main channel. The distance, L., between the Point of Tangency, PT, and the junction apex is computed by use of the following equation: b3-Abl Lo = (rc + b3) Sin os-1 [i_ rc + bs 1 The total length of the curve, Lct, from PC to PT, can be computed from: 2irre Lct 360 The location of the point of curvature, PC, can be computed from: PC = PI - r Tan e 2 The location of the point of Tangency, PT, can be computed from: (8.42) (8.43) (8.44) PT = PC + Lct (8.45) Figure 8.14 shows the relationship of these parameters. 5. Compute the confluence length, Lc, by using the following equations (Los Angeles County Flood Control District, 1973): and, b3 Let = Sine ' (8.46) Lc2 = 5(b2 - bl) (8.47) and compare these lengths to the distance L. (Equation 8.42) from the apex to the PT point. The longest of the three is the confluence length, Lc. 8.42 Marana Town Council Regular Meeting Agenda Packet Page 264 of 395 November 19, 2024 VIIL OPEN -CHANNEL DESIGN 6. Using the confluence length, Lc, and the momentum equation (i.e., Equation 8.24), determine the depth of flow and hydraulic conditions at b2. If either the depth of flow or water -surface elevation is significantly different than its value in the upstream main channel, select a new b2 and repeat the procedure. 7. Once satisfactory hydraulic conditions at b2 have been established, determine the transition distance to b4 by the procedure outlined in Section 8.5.11 of this Manual. (Note: b2 in Section 10.5.11 of this Manual is equivalent to b4 in this section of the Manual.) An example of this procedure is provided at the end of this chapter. When designing junctions, consideration should be given to the waves that will occur along the opposite channel wall when only one of the converging channels is discharging into the composite channel. Due to the sporadic nature of thunderstorms in the Tucson Area, it is possible to have flow in one channel and not in the other. Under supercritical flow conditions, experiments have shown that waves can be quite high, particularly if the angle of confluence is excessive. Fortunately, if the angle of confluence is equal to or less than twelve degrees (preferably six degrees), and the design procedure described above is followed, these type of waves should not be a problem. However, should a greater angle of confluence be dictated by site conditions, extra freeboard will be required according to the procedure described in Section 8.5.12.1(3) of this Manual in order to contain waves created by flow impinging onto the opposite bank. 8.5.13 Collector Channels Collector channels are generally designed to collect unconsolidated sheet flow, or wide, shallow, braided flow for the purpose of removing the downstream property from the floodplain. Collector channels generally do not follow the existing drainage pattern. Therefore, they have more stringent design requirements than do most other channels. 8.5.13.1 Cross Section and Slope Collector channels provide the best hydraulic performance if the width/depth ratio is as low as possible. Cross sections with wide bottoms and low depths should be avoided, if topography permits. Channel slopes should be as steep as reasonably possible to help accelerate the water and prevent sediment buildup. 8.5.13.2 Depth The discharge in collector channels increases with distance along the channel. Collector channel flows are subject to head losses associated with the impact and turbulence created by flow entering the channel over its bank, in addition to the normal losses created by friction. Therefore, normal -depth procedures and step - backwater calculations are not applicable. The correct procedure for analyzing spatially -varied flow of the type that occurs in collector channels is given in many 8.43 Marana Town Council Regular Meeting Agenda Packet Page 265 of 395 November 19, 2024 VIII. OPEN -CHANNEL DESIGN hydraulics textbooks under the heading "Side -Channel Spillways" (e.g., see Chow, 1959, page 329). The minimum depth of a collector channel in the City of Tucson shall be twice the critical depth of the design flood for channels with supercritical slopes, and twice the normal depth of the design flood for channels with subcritical slopes. This depth will vary along the length of the channel as the discharge increases. The transition from the collector channel to the main channel shall be designed using standard backwater procedures. Backwater computations should begin at the point where inflow over the side of the collector channel ceases, and end at a point where normal depth is encountered, or where flow is no longer affected by the collector channel. When unusual circumstances exist, such as the presence of a definite control point at or near the end of a collector channel, the "Method of Numerical Integration," as outlined in Chow (1959) shall be used to design same. This method may also be used if there is reason to believe that the guidelines presented above result in an overdesign of a collector channel. 8.5.13.3 Erosion Protection Erosion protection for a collector channel requires special consideration because of inflow from the side. Hydrostatic pressure in the soil and seepage behind the bank protection can cause the bank protection to fail. Another problem is scour caused by side inflow. To prevent failure of the bank protection along a collector channel due to side inflow, seepage, and/or hydrostatic pressure, a horizontal concrete apron is normally required along the top of the upstream (inflow) side of the collector channel. This concrete apron shall be connected to the bank protection, and have a width, measured perpendicular to the bank, which is at least four times the critical depth of side inflow during the design flood. A key -in at the upstream edge of the concrete apron should extend to a depth equal to the depth of the collector channel. However, the apron and key -in are not required if the channel bank is constructed of 9-foot-thick soil cement. The bottom of the collector channel shall be lined, unless the toe -down protection for the bank is deep enough to protect against the scour caused by side inflow. The procedures given in Chapter VI of this Manual shall be used to compute side -inflow scour depth. Normal -depth shall be used as the tailwater depth in the channel for this equation. If the width of the channel is less than five times the computed scour depth, extra toe -down protection to the full depth of scour is needed on both banks. For channel bottom widths at least ten times the depth of scour, no extra toe -down is needed on the opposite bank. For widths between five and ten times the depth of scour, the toe -down on the opposite bank should be computed via a linear interpolation between the side -flow scour depth and the normal toe -down depth. A typical collector channel is shown in Figure 8.15. 8.44 Marana Town Council Regular Meeting Agenda Packet Page 266 of 395 November 19, 2024 SIDE INFLOW �LEVEE 10' MIN. cs= CRITICAL DEPTH OF SIDE FLOW c = CRITICAL DEPTH OF CHANNEL FLOW Yn = NORMAL DEPTH OF CHANNEL FLOW NOTE: A PROPERLY DESIGNED LEVEE OF HEIGHT YccOR Yne CAN BE CONSTRUCTED ALONG THE BANK OPPOSITE THE SIDE INFLOW IN LIEU OF THE 2YCCOR 2Ync REQUIREMENT. FIGURE 8.15 TYPICAL COLLECTOR -CHANNEL CROSS SECTION GROUND SURFACE NOIS311 13AIAIVHD-S13d0 Marana Town Council Regular Meeting Agenda Packet Page 267 of 395 November 19, 2024 VIII. OPEN -CHANNEL DESIGN 8.5.13.4 Sediment Depending upon the amount of sediment supply, and upon sediment -transport capacity, a collector channel could either aggrade or degrade, if not properly designed. The reader is referred to Chapter VI of this Manual for those procedures that consider the effects of deposition and/or scour of alluvial sediments upon open -channel design. 8.5.13.5 Additional Design Considerations Material removed by excavation to form the collector channel could be used to construct a levee along the side opposite the lateral inflow. Such a levee, if properly designed, would then be able to serve as a substitute for the depth requirement otherwise imposed upon the design of a collector channel (i.e., two times the appropriate flow depth), and would ensure that all lateral inflow is captured by the collector channel. The minimum height of such a levee should be equal to the normal depth of flow at the peak of the design flood for subcritical conditions, and equal to the critical depth of flow at the peak of the design flood for supercritical conditions. The lowest floor of the first tier of buildings along the downstream side of a collector channel should be at least one foot above the 100-year water -surface elevation in the collector channel in order to safeguard against possible failure of the collector -channel embankment. This water -surface elevation shall be determined either by the Method of Numerical Integration or by assuming an elevation equal to either (1) two times the normal depth at the peak of the design flood for subcritical flow, or (2) two times the critical depth at the peak of the design flood for supercritical flow, whichever is greater. 8.46 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 268 of 395 VIII. OPEN -CHANNEL DESIGN EXAMPLE 8.1: SEQUENT DEPTH IN A TRAPEZOIDAL CHANNEL A hydraulic jump is to be formed in a trapezoidal channel through the use of baffle blocks and an abrupt change in slope from steep to mild. Hydraulic conditions upstream of the jump are: Discharge (Q) Channel Slope (S) Bottom Width (b) Side Slopes (Z) Roughness (n) Depth (Y) Froude Number (F„) Hydraulic Depth (Yh) = 500 cfs = 0.015 = 10 ft = 1:1 = 0.015 = 2.3 ft = 2.2 = 1.9 ft Equation 8.6 will be used. Normal depth upstream of the jump is 2.3 feet; so, as an initial estimate, a sequent depth of four feet will be chosen. From Equation 8.6: 1(2.3)3 10(2.3)2 5002 1(4)3 10(4)2 5002 3 + 2 + g(28.3) 3 + 2 + g(56.0) 304.9 = 240.0 Momentum does not balance, so a new sequent depth is chosen. By trial and error, the sequent depth is found to be 5.6 ft: 1(2.3)3 10(2.3)2 5002 1(5.6)3 10(5.6)2 5002 3 + 2 + __ g(28.3) 3 + 2 + g(87.4) 304.9 = 304.2 (close enough) The engineer should exercise care in using Equation 8.6, especially with calculator or computer -program "root solvers," because there are two other roots besides the correct one for sequent depth. One obvious solution is Y2 = Yl. The third root is usually negative. In this case, the value -13.1 also satisfies the equation. Figure 8.4 can also be used to solve for sequent depth in this example. To do this, first compute t = 10/[1(2.3)] = 4.3. From Figure 8.4, using Fu = 2.2 and t = 4.3, Y2/Yl = 2.4. Y2 is then: 2.4 (2.3 ft) = 5.5 ft. 8.47 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 269 of 395 VIII. OPEN -CHANNEL DESIGN EXAMPLE 8.2: THE DESIGN OF AN OPEN -CHANNEL JUNCTION UNDER SUPER- CRITICAL FLOW CONDITIONS In this example, a main -channel flow, Q1, of 2000 cubic feet per second (cfs) is to be joined by a side -channel flow, Q3, of 775 cfs. The confluence angle, 0, is six degrees. The slope and bottom -width of the side channel have been established to ensure that the depth of flow at the junction is the same as the depth of flow in the main channel. It is desired that this depth of flow be maintained throughout the junction. Hydraulic conditions in the section Iocated upstream of the channel junction are as follows: Main Channel Side Channel Q1 = 2000 cfs Qg = 775 cfs n = 0.015 (concrete) n = 0.015 (concrete) b1 = 20.0 ft b3 = 8.0 ft Y1 = 4.0 ft Y3 - 4.0 ft Z = 1:1 Z = 1:1 Si = 0.01 ft/ft S9 = 0.008 ft/ft Fl = 2.0 F3 = 1.70 Al = 95.8 ft2 A3 = 47.8 ft2 Vl = 20.9 fps V3 = 16.2 fps Hydraulic conditions in the composite channel section Iocated downstream of the junction are as follows: Q4 = 2775 cfs n = 0.015 (concrete) b4 = 28.0 ft Y4 = 4.0ft Z = 1:1 S = 0.01 ft/ft F = 2.0 A4 = 127.7 ft2 V4 = 21.7 fps 8.48 Marana Town Council Regular Meeting Agenda Packet Page 270 of 395 November 19, 2024 STEP 1: Assume b2 = bl+b3 = 20+8 = 28 feet. Use centerline offset (Figure 8.14 A). AN = 8 ft rc _ 3b3 gY3 VIII. OPEN -CHANNEL DESIGN 4(16.2)2(8) + 400 = g(4) + 400 = 465.2 feet Assume station PI = 100+00 Station PC = 100+00 - rc Tan Z Station PC = 100+00 - 465.2 Tan 6/2 = 99+75.62 Curve length, Lit, — rc (0) 360 L = 465.2(6) 360 ` 48.72 feet Station PT = 99+75.62 + 48.72 = 100+24.34 Because b3 = nbl, the distance from the apex to PT is 0. The confluence length, Lc, is: or (8) — 76.5 feet Lc = Si L = (28-20)10 — 40.0 feet 2 Using the largest of these values yields: Lc=76.5feet 8.49 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 271 of 395 VIII. OPEN -CHANNEL DESIGN Assume the depth of flow at b2 = 4 feet. From Equations 8.25 to 8.32: M1 _ (20002) — 1294.0 - [20+1(4)]g(4) _ (2775)2 M2 - [28+1(4)]g(4) — 1868.4 775 z _ 390.2 M3 = (47.8)g Phl = 6 [3(20) + 2(1)4] = 181.3 (4)2 Ph2 = 6 [3(28) + 2(1)4] = 245.3 Phi 20+28 10.77[4 + (4-4)120+2(28)1 23(20+28) = 73.9 Phw — 444 120228 (4-4)+0.77[1(4)+1(4)]+[28+1(4)]4-4[20+1(4)] = 76.3 Phf — 76.5 (0.01+0.01) [20+1(4)]4+[28+1(4)]4 4 = 85.7 8.50 Marana Town Council Regular Meeting Agenda Packet Page 272 of 395 November 19, 2024 VIII. OPEN -CHANNEL DESIGN Using Equation 8.24: 245.3+1868.4 = 181.3+1294.0+390.2Cos6°+73.9+76.3-85.7 2113.7 = 1927.9 Since forces do not balance, another depth should be tried using the same width. By trial and error, obtain D5 = 4.5 feet. _ (2775)2 MZ [28+1(4.5)]g(4.5) ` 1635.2 Ph2 = (4'6)2 [3(28) + 2(1)4.5] = 313.9 Phi Phw Phf 20+28 0 77 4 + (4.5-4.0)(20+2(28)1 2 3(20+28) = 78.8 _4.0+4.5 [20+28(4045)+027[J(4)+J(45)J+[28+J(45)]45_[20+J(4)]4 4 2 = 86.2 = 76.5(0.01+0.01) [20+1(4)14 + [28+1(4.5)]4.5 4 I = 92.7 8.51 Marana Town Council Regular Meeting Agenda Packet Page 273 of 395 November 19, 2024 VIII. OPEN -CHANNEL DESIGN By Equation 8.23: 313.94-1635.2 = 181.34-1294.04-390.2Cos6°+78.8+86.2-92.7 1949.1 = 1935.7 (close enough) The momentum balance at this point is close enough to cease further itera- tions. Therefore, the hydraulic conditions at the end of the junction are as follows: Q = 2775 cfs b3 = 28.0 ft Y3 = 4.5 ft Z = 1:1 F3 = 1.7 V3 = 19.0 fps `43 = 146.3 ft2 Additional bank -protection height will be needed to accommodate this depth. A step -backwater computation may be used to compute the distance from the end of the junction to the point at which normal depth occurs. 8.52 Marana Town Council Regular Meeting Agenda Packet Page 274 of 395 November 19, 2024 X. STORM DRAINS 10.6.9 Clogging The following guidelines should be followed to provide an appropriate factor of safety against clogging at pavement inlets: GRATES AND SLOTTED DRAINS: 1. Sump Conditions: a. Orifice Flow: required area = 2.0 x calculated area. b. Weir Flow: required perimeter = 2.0 x calculated perimeter. 2. Continuous -grade conditions: a. Required length of opening = 2.0 x calculated length. CURB INLETS: 1. Sump Conditions: a. Required length of opening = 1.50 x calculated length. 2. Continuous -grade conditions: a. Required length of opening = 1.25 x calculated length. COMBINATION GRATE AND CURB INLET: 1. Sump Conditions: a. Orifice Flow: required area = 2.0 x calculated area for grate; required length = 1.25 x calculated length for curb inlet. b. Weir flow: required perimeter = 1.0 x calculated perimeter for grate; required length = 1.25 x calculated length for curb inlet. 2. Continuous -grade conditions: a. Required length of opening = 1.0 x calculated length for grate; required length = 1.25 x calculated length for curb inlet. 10.24 Marana Town Council Regular Meeting Agenda Packet Page 275 of 395 November 19, 2024 X. STORM DRAINS ADOT STANDARD TYPE-3 CATCH BASINS: 1. Continuous -Grade Conditions: a. Required curb -inlet length upstream from catch basin = 1.25 x calculated length. b. Required length of grate = 1.0 x calculated length. These general guidelines should be used unless more -detailed information about clogging for a specific grate type is available. A publication by the American Society of Civil Engineers and Water Pollution Control Federation (1987) gives relative rankings for debris -handling efficiencies of several types of grates. Figure 10.5 can also be used to obtain an estimate of the ability of a grate to handle debris. Grates that are longer than necessary to intercept 100 percent of frontal flow will have greater debris - handling efficiencies than will shorter grates. 10.7 Inlet Design Procedure Inlet Locations: 1. Using the plan -and -profile information developed for the proposed roadway, locate all points where 100-percent interception of runoff will be required. These will be located at sumps, street intersections, and at other locations where it is felt that anything less than 100-percent interception would be unacceptably hazardous. 2. Choose a proposed street -arid -gutter cross section. The maximum allowable cross -slope for a street is two percent. Depressed concrete gutters with a width of twenty-one inches and a cross -slope of 0.048 may be used to increase gutter capacity. Using the proposed cross section and slopes, determine the maximum discharge that the street will carry according to the design limitations. 3. Locate drainage area (D.A.) concentration points and determine discharges for all offsite runoff affecting the project. Offsite inlets will be needed for all offsite drainage exceeding the design capacity of the street. 4. The remaining drainage area should consist of the street itself, and possibly some offsite sheet flow. The watershed should be long, and more or less of uniform width. Using (1) an assumed time of concentration of five minutes; (2) the maximum discharge capacity computed in Step Two; and (3) an appropriate runoff coefficient, apply the City of Tucson hydrology method in order to determine the area of watershed required to produce the maximum allowable street discharge. When this area is divided by the width of the watershed, it will give the length of the watershed from its approximate upstream end to the first storm -drain inlet. Check the watershed hydrology to ensure that the assumed five-minute time of concentration is correct. 10.25 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 276 of 395 X. STORM DRAINS To determine total gutter flow, the cross section is divided into segments of equal width, and the discharge for each segment is computed by Manning's equation. The parabola can be approximated very closely by two -foot -wide segments. The total discharge is the sum of the discharges in all segments. This procedure is illustrated by Example 10.13.1, found at the end of this chapter. Some streets within the City of Tucson have inverted crowns (i.e., the lowest point is at the center of the street, instead of at the curb). Discharge for this type of street cross section can be estimated using the following procedures. For a parabolic cross section, use Manning's equation, along with the following relationships: Area (A) = 2/3TY, in square feet; (10.6) Wetted perimeter (P) = T + 8/3 YZ , in feet; (10.7) Top Width (T) = 3/2 Y , in feet; and, (10.8) Hydraulic Depth (Yh) = 2/3 Y, in feet. (10.9) Where: Y = Maximum Depth, in feet. However, it should be noted that, within the City of Tucson, streets with inverted crowns are normally built using a triangular cross section. For flow in a triangular inverted -crown section, use either Equation 10.3 or the nomograph shown in Figure 10.1. 10.6 Pavement Inlets The capability of pavement inlets to quickly remove water from the street and into a storm drain depends upon their inlet geometry and upon the flow characteristics in the street and gutter. Pavement inlets are normally divided into the following three general types, with each having many variations: 1. Grate inlets: These inlets consist either of an opening in the gutter, covered by one or more grates, or an opening which spans the entire width of pavement (i.e., a "street grate"). 10.08 Marana Town Council Regular Meeting Agenda Packet Page 277 of 395 November 19, 2024 X. STORM DRAINS 2. Curb inlets: These inlets consist of a vertical opening in the curb, through which the gutter flow passes. 3. Combination inlets: These inlets consist of a curb inlet and a grate inlet acting as a single unit. Grate inlets are most effective where clogging due to debris is not a problem. Excluding the effect of debris, the inlet capacity of grates in a sag condition depends mainly upon the open area of the grate and upon the depth of ponding. Capacity of grate inlets on a continuous grade depends primarily upon the discharge flowing directly over the grate, and upon the length and type of grate. Grate inlets become more effective in relation to curb inlets as the grade of the roadway increases. On grades of over three percent, grate inlets should be used instead of curb inlets. Grates are also useful where cross -slopes for depressed gutters at curb inlets are not desirable, from a traffic standpoint, and at locations other than the edge of curb. For instance, grates are commonly used to collect flow at the middle of an inverted street. The most efficient types of grates on a continuous grade are those which have all bars parallel to the direction of flow. Unfortunately, these grates typically are not safe for bicyclists; and therefore are not permitted to be used on City streets. However, there are many varieties of "bicycle -safe" grates which can be used on City streets (the interested reader should refer to a publication by the American Society of Civil Engineers and the Water Pollution Control Federation, 1987). Curb inlets have few clogging problems; and they are most effective on relatively flat grades, where the depth of flow is sufficient for the inlet to perform efficiently. The interception capacity of curb inlets is largely dependent upon flow or ponding depth at the curb, and upon the length and height of the curb inlet. The flow - interception capacity is increased by a gutter depression at the curb inlet, or a depressed (composite) gutter to increase the proportion of the total flow adjacent to the curb. Top -slab supports can decrease the capacity of an inlet, if placed flush with the opening. Supports should be recessed several inches from the curb line. One advantage to curb inlets is that they pose little threat to bicyclists. A disadvantage is that the openings are relatively wide, and could pose a danger to children. Therefore, it is recommended that curb inlets with a height of six inches or more be fitted with cross bars. Another disadvantage of curb inlets is that the depression adjacent to them could be hazardous to traffic at some locations. Combination inlets can be very effective if the grate is placed at the downstream end of the structure --thereby allowing the curb inlet to collect the debris before it can clog the grate. The design capacity of these structures is the sum of the individual design capacities. If the curb inlet and grate are placed adjacent to each other, the total design capacity is only that of the grate alone. 10.09 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 278 of 395 X. STORM DRAINS Capacity charts for grate and curb inlets are widely available. However, due to the variety of configurations on the market, it is considered more useful here to merely present the basic relationships under which they operate. 10.6.1 Capacity of a Grate Inlet in a Sag At low-water depths, a grate inlet in a sag operates as a weir, with a crest length equal to the outside perimeter of the grate along which the flow enters. Weir operation continues to a depth of about 0.4 foot above the top of grate, and the discharge intercepted by the grate is: Qi = 3.0 PgY3/2 (10.10) Where: Qi = Rate of discharge into the grate opening, in cubic feet per second; Pg = Perimeter of grate opening, in feet, disregarding bars and neglecting the side against the curb, if present; and, Y = Depth of water at the grate, in feet. When the depth at the grate exceeds about 1.4 feet, the grate begins to operate as an orifice, and the discharge intercepted by the grate is: Qi = 5.35 AY112 (10.11) Where: Qi = Rate of discharge into the grate opening, in cubic feet per second; A = Clear -opening area of the grate, in square feet; and, Y = Depth of ponded water above the top of grate, in feet. For depths over the grate between about 0.4 feet and about 1.4 feet, the operation of the grate inlet is indefinite. In this case, the depth of flow should be computed by both equations. The equation which yields the higher of the two values for depth should then be used for design purposes. If the grate is sloped such that the side away from the curb is considerably higher than the curb side, the side inflow and end inflow should be computed separately. Inflow over the end of a grate, when it is operating as a weir, should be computed from: Q = 2/5[ CL yZ/2 - ys/z ey2_yl 10.10 (10.12) Marana Town Council Regular Meeting Agenda Packet Page 279 of 395 November 19, 2024 X. STORM DRAINS Where: Q. = Rate of discharge over the end of the grate opening, in cubic feet per second; Y1 = Depth of flow at the shallow side of the grate, in feet; Y2 = Depth of flow at the deep side of the grate, in feet; L = Distance from Yi to Y2, in feet; and, C = Weir coefficient = 3.0. Total interception of the flow is then computed by summing the flows calculated at each end of the grate opening, using Equation 10.12, with the flow calculated on each side of the grate opening, using Equation 10.10. When a sloped grate is operating under conditions of orifice flow, the following equation should be used to compute its interception capacity: Qi = 3.60 -A [1112 - /a Y2 Y� (10.13) Where all terms are as previously defined within Equation 10.11 and Equation 10.12. 10.6.2 Capacity of a Curb Inlet in a Sag A curb inlet in a sag operates as a weir to depths up to the height of the curb inlet, and as an orifice at depths greater than 1.4 times the opening height. Between those depths, flow is in a transition stage. The equation for computing the interception capacity of a curb inlet without a depression which operates as a weir is: Qi = 2.3 LY3/2 (10.14) Where: L = Length of curb inlet, in feet; and, Yi = Depth at lip of curb inlet, in feet (i.e., Yi = TS.). The equation for computing the interception capacity of a depressed curb inlet which operates as a weir is: Qi = 2.3 (L + 1.8W)Y3/2 (10.15) 10.11 Marana Town Council Regular Meeting Agenda Packet Page 280 of 395 November 19, 2024 X. STORM DRAINS Where: W = Lateral width of depression, in feet; and all other terms are as previously described. Equation 10.15 is applicable to depths at the curb which are approximately equal to the height of the opening, plus the depth of the depression. Curb inlets operate as orifices at depths greater than 1.4(h) (see Figure 10.3). The equation for interception capacity is then: Qi = 5.35A(Yi - h/2)112 or Qi = 5.35 AYol/z Where: Yo = Effective head on the center of the orifice throat, in feet; A = Clear area of opening, in feet; Yi = Depth at lip of curb inlet, in feet; h = Height of curb -inlet orifice, in feet; and, L = Length of curb inlet, in feet. (10.16a) (10.16b) Figure 10.3 gives the relationship between the variables for horizontal -throat, inclined -throat, and vertical -throat inlets. Curb -inlet capacity in the transition stage, when ponding depth is 1.0 to 1.4 times the opening height, should be computed using both the weir equation and the orifice equation. The equation which yields the lesser discharge at equal head should then be used for design purposes. 10.6.3 Capacity of a Combination Inlet in a Sag When weir -flow applies, the interception capacity of a combination inlet in a sag, consisting of a grate and a curb inlet, is essentially equal to the capacity of the grate only, unless the grate becomes clogged. In orifice flow, the capacity is equal to the capacity of the grate, plus the capacity of the curb inlet. 10.6.4 Capacity of a Slotted Inlet in a Sag A slotted inlet in a sag normally operates as a weir to depths of about 0.2 feet. At depths greater than about 0.4 feet, it performs as an orifice. Between these depths, the more conservative of the two equations (i.e., the one which predicts the greatest depth) should be used for design purposes. The interception capacity, Qi, of a slotted inlet operating as an orifice should be computed from: Qi = 6.42 LWY1 2 (10.17) 10.12 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 281 of 395 Q= 5.35hLYo/2 L= Length of Opening X. STORM DRAINS Yo h 1 Yi Yo=Yi—h/2 (a ) HORIZONTAL THROAT .....��...... Yo=Yi—(h/2)Sine \.....�.��� ( b ) INCLINED THROAT FIGURE 10.3 CURB —OPENING INLETS 10.13 h f- (c) VERTICAL THROAT Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 282 of 395 X. STORM DRAINS Where: L = Length of slot, in feet; W = Width of slot, in feet; and, Y = Depth of water at slot, in feet. 10.6.5 Capacity of a Grate Inlet on a Continuous Grade A grate inlet on a continuous grade will intercept all of the frontal flow passing over the grate, unless the grate becomes clogged or splash -over occurs. Splash -over will occur, and only a portion of the frontal flow will be intercepted, if the velocity is high or the grate is short. Normally, a small part of the flow along the side of the grate will also be intercepted. Therefore, the total capacity of a grate is the sum of the frontal flow and the side flow, minus the splash -over flow. The amount of frontal flow, Qf, should be computed with the following equation: Qf QT = Eo = 1 - (1 - W/T)8/3 Where: Qf = Frontal flow at width W, in cubic feet per second; QT = Total gutter flow, in cubic feet per second; W = Width of grate, in feet; T = Total spread of water at the gutter, in feet; and, E. = Ratio of frontal flow to total gutter flow. Figure 10.4 provides a graphical solution of the frontal -flow equation. The ratio, Rf, of frontal flow intercepted, Qfi, to total frontal flow, expressed by: Qf, Qf = Rf = 1 - 0.09 (V - Vo) Where: V = Velocity of flow in the gutter, in feet per second; and, V. = Gutter velocity at which splash -over first occurs, in feet per second. Qf, is (10.19) V. is different for different grates, and must be determined experimentally. Figure 10.5 gives splash -over velocities for several common grate types and sizes described in a publication by the American Society of Civil Engineers and Water Pollution Control Federation (1987). Figure 10.5 also provides a graphical solution to the ratio of frontal flow captured to total frontal flow. 10.14 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 283 of 395 I.0 0.8 0.6 0 O 0 w 0.4 0.2 0 X. STORM DRAINS 1 i Cb T — I T • SX Prilliiiiiiiiii.°°- - 1 1 i T - 1 W--I T 1 1 0.2 04 W/T 0.6 Qf=EOQT 0.8 FIGURE 10.4 RATIO OF FRONTAL FLOW TO TOTAL GUTTER FLOW 10.15 I0 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 284 of 395 X. STORM DRAINS SPLASH -OVER VELOCITY, V. 13 IZ 11 10 9 8 7 6 5 4 3 2 0 0 GIVEN: RETICULINE GRATE L= 3 FT V= 8 FT/S FIND: Rf. 0.81 1 2 3 4 LENGTH OF GRATE, L (FT1 /A/ 0 al 02 0.3 04 05 0.6 0.7 08 0.9 1.0 Qfi Rf Q f Rf FIGURE 10.5 FRONTAL -FLOW INTERCEPTION EFFICIENCY FOR GRATE INLETS 10.16 Marana Town Council Regular Meeting Agenda Packet Page 285 of 395 November 19, 2024 X. STORM DRAINS The amount of side flow, Qe, is equal to the total flow minus the frontal flow (i.e., Q. = QT - Qf). The ratio, Ref, of side flow intercepted, Qei, to total side flow, Qe, is given by: Qei — = Ref = 1 + (10.20) Q. 0.15 V 1.8 Sx L2.s Where: L = Length of the grate, in feet, and the other terms are as previously defined. Note the negative exponent in this equation. Figure 10.6 provides a graphical solution to this equation. The total interception capacity (Qi) of a grate inlet on a continuous grade is therefore equal to: Qi = RfQf + RBfQ8 (10.21) 10.6.6 Capacity of a Curb Inlet on a Continuous Grade The length of a curb inlet required for total interception of gutter flow on a pavement section with a straight cross -slope (i.e., no gutter depression) is expressed by: 0.6 Lt = 0.6 QT42 oo.s n Sx (10.22) Where: Lt = Curb -inlet length required to intercept 100 percent of the gutter flow, in feet; Sx = Pavement cross -slope, in feet per foot; So = Longitudinal slope of gutter, in feet per foot; and, n = Manning's roughness coefficient. 10.17 Marana Town Council Regular Meeting Agenda Packet Page 286 of 395 November 19, 2024 X. STORM DRAINS R sf 0.8 0.6 0.4 0.3 0.2 0.1 0.08 0.06 0.04 0.03 0.02 0.2 0.1 0.08 0.06 Sx 0.04 0.03 0.02 0.01 r - IIIIIL INSitlk s IL ii.. E I o 'S lik \ \ ExAMPLE. • 1 ,c�� GIVEN: Sx= 0.025 _ L = 2 V = 4 - - FIND: + is 1 cp FT FT/S 3 1 _ ^ R5 = 0.063 Qsi = RSfQs FIGURE 10.6 SIDE -FLOW INTERCEPTION EFFICIENCY FOR GRATE INLETS 10.18 Marana Town Council Regular Meeting Agenda Packet Page 287 of 395 November 19, 2024 X. STORM DRAINS The efficiency of curb inlets shorter than the length required for total interception is expressed by: E1 = 1 - (1 - Li/Lt)1'e (10.23) Where: E; = Ratio of discharge intercepted by the curb inlet to total discharge (i.e., the "efficiency" of the curb inlet); L1 = Curb -inlet length, in feet; and, Lt = As defined in Equation 10.22 Figure 10.7 is a nomograph for the solution of Equation 10.22, and Figure 10.8 provides a solution of Equation 10.23. The length of inlet required for total interception by depressed curb inlets, or curb inlets in depressed gutter sections, can be found by the use of an equivalent cross slope, Se, in place of S. in Equation 10.22, as determined by the following equation: Se=SX+S',,,E0 (10.24) Where: a S',,, = — = Cross -slope of the gutter, measured from the cross -slope of 12W pavement, S., in feet per foot. And where: a = Gutter depression, in inches, at the curb inlet (measured as the vertical distance between the Iow point of the gutter and the point where the cross slope of the pavement intersects the curb. For a standard twenty -one -inch gutter width, with a one -inch drop from one side to the other and a two -percent street cross -slope, "a" is equal to six - tenths of an inch); W = Width of depressed gutter, in feet; and, E0 = Ratio of flow in the depressed section to total gutter flow. NOTE: Eo is the same ratio as that used to compute the frontal flow interception of a grate inlet. Equations 10.22 and 10.23 can be combined to directly compute the length of the curb inlet required to intercept a certain percentage of the total discharge. This expression is: 10.19 Marana Town Council Regular Meeting Agenda Packet Page 288 of 395 November 19, 2024 X. STORM DRAINS L t =0 6Q0.42Soo.3(I /11Sx)0.6 FOR COMPOSITE CROSS SLOPES, USE Se FOR Sx Se = Sx + Sw E. ; Syr = d 12W n - 0.01 - 0.02 So 0.00I 0.01 0.1 TURNING LINE Sx, Se -- 0.01 f 0.02 - 0.03 - 0.04 0.06 0.08 0.1 0.2 EXAMPLE: GIVEN: n=0.OI6 ; S=0.01 Sx=0.02 ; Q= 4 FT3/SEC FINO: Lt = 34 FT TURNING LINE FIGURE 10.7 INLET LENGTH FOR TOTAL INTERCEPTION BY CURB OPENINGS AND SLOTTED DRAINS 10.20 LT (FT) -80 -70 -60 50 `40 Q (FT3/S) 50 - 40- 30- 20 I0- 8 - 6- -305_ 20 I0 9 8 _7 -6 -5 -4 3- 2 0.8 0.6 - 0.5 - 0.4 - 0.3 - Marana Town Council Regular Meeting Agenda Packet Page 289 of 395 November 19, 2024 1.0 0.8 0.6 w 0.2 0 X. STORM DRAINS i f 1 1 i - �Ei-1-(1-Li/Lt)l.e 0 0.2 04 Li/Lt 0.6 FIGURE 10.8 INLET INTERCEPTION EFFICIENCY FOR CURB OPENINGS AND SLOTTED DRAINS 10.21 0.8 10 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 290 of 395 X. STORM DRAINS Q0.42 5,0.3 I [ Li = 0.6 no.s S 0.6 1 - [1-E13o.5s1 Where all terms are as previously defined. (10.25) As with Equation 10.22, the S. term is replaced by an equivalent cross slope, Se, for a compound gutter section (see Figure 10.9). The equivalent cross slope can then be computed by combining Equations 10.4 and 10.24 to form the expression: t/2 8/3 8/3 a So Ycr - Ygb Se = S. + 0.0467 (10.26) Qn Ycf -Ygb Where all terms are as previously defined. NOTE: In Equation 10.24, the "Ycf" and "Ygb" terms represent the depth of flow at the curb face and the depth of flow at the gutter edge, in the gutter approaching the curb inlet, respectively. As a rule of thumb, for preliminary sizing of curb -inlet lengths with compound gutter sections, it can be assumed that the curb -inlet capacity is 0.75 cfs/foot, if the pavement spread is over two lanes, and 0.40 cfs/foot, if the pavement spread is over only one lane. This assumes a two-inch depressed gutter at the curb inlet; a 75- percent inlet efficiency; and no consideration for clogging due 10 debris. 10.6.7 Capacity of a Combination Inlet on a Continuous Grade A combination inlet on a continuous grade, where the curb inlet and grate are placed side -by -side, does not have much greater capacity than the grate alone. This type of inlet should not be used on a continuous grade. However, combination inlets with the curb inlet located upstream of the grate are useful, because the curb inlet intercepts normal debris loads which could otherwise clog the grate on a frequent basis. The capacity of these inlets is the sum of the capacities of the curb inlet and the grate. However, the discharge over the grate must be reduced by an amount equal to the interception capacity of the curb inlet. 10.6.8 Capacity of a Sloped Inlet on a Continuous Grade The capacity of a slotted inlet on a continuous grade can be computed using the same formulas and charts that are used for computing curb -inlet capacities. The advantage of using slotted inlets is their versatility. They can be used on both curbed and uncurbed streets to collect a wide variety of flow patterns. 10.22 Marana Town Council Regular Meeting Agenda Packet Page 291 of 395 November 19, 2024 CURB FACE OR INLET t Ycf -� 1 .ZYgb S% GUTTER w ----. FIGURE 10.9 COMPOUND GUTTER SECTION 10.23 X. STORM DRAINS PAVEMENT Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 292 of 395 X. STORM DRAINS 10.6.9 Clogging The following guidelines should be followed to provide an appropriate factor of safety against clogging at pavement inlets: GRATES AND SLOTTED DRAINS: 1. Sump Conditions: a. Orifice Flow: required area = 2.0 x calculated area. b. Weir Flow: required perimeter = 2.0 x calculated perimeter. 2. Continuous -grade conditions: a. Required length of opening = 2.0 x calculated length. CURB INLETS: 1. Sump Conditions: a. Required length of opening = 1.50 x calculated length. 2. Continuous -grade conditions: a. Required length of opening = 1.25 x calculated length. COMBINATION GRATE AND CURB INLET: 1. Sump Conditions: a. Orifice Flow: required area = 2.0 x calculated area for grate; required length = 1.25 x calculated length for curb inlet. b. Weir flow: required perimeter = 1.0 x calculated perimeter for grate; required length = 1.25 x calculated length for curb inlet. 2. Continuous -grade conditions: a. Required length of opening = 1.0 x calculated length for grate; required length = 1.25 x calculated length for curb inlet. 10.24 Marana Town Council Regular Meeting Agenda Packet Page 293 of 395 November 19, 2024 X. STORM DRAINS ADOT STANDARD TYPE-3 CATCH BASINS: 1. Continuous -Grade Conditions: a. Required curb -inlet length upstream from catch basin = 1.25 x calculated length. b. Required length of grate = 1.0 x calculated length. These general guidelines should be used unless more -detailed information about clogging for a specific grate type is available. A publication by the American Society of Civil Engineers and Water Pollution Control Federation (1987) gives relative rankings for debris -handling efficiencies of several types of grates. Figure 10.5 can also be used to obtain an estimate of the ability of a grate to handle debris. Grates that are longer than necessary to intercept 100 percent of frontal flow will have greater debris - handling efficiencies than will shorter grates. 10.7 Inlet Design Procedure Inlet Locations: 1. Using the plan -and -profile information developed for the proposed roadway, locate all points where 100-percent interception of runoff will be required. These will be located at sumps, street intersections, and at other locations where it is felt that anything less than 100-percent interception would be unacceptably hazardous. 2. Choose a proposed street -arid -gutter cross section. The maximum allowable cross -slope for a street is two percent. Depressed concrete gutters with a width of twenty-one inches and a cross -slope of 0.048 may be used to increase gutter capacity. Using the proposed cross section and slopes, determine the maximum discharge that the street will carry according to the design limitations. 3. Locate drainage area (D.A.) concentration points and determine discharges for all offsite runoff affecting the project. Offsite inlets will be needed for all offsite drainage exceeding the design capacity of the street. 4. The remaining drainage area should consist of the street itself, and possibly some offsite sheet flow. The watershed should be long, and more or less of uniform width. Using (1) an assumed time of concentration of five minutes; (2) the maximum discharge capacity computed in Step Two; and (3) an appropriate runoff coefficient, apply the City of Tucson hydrology method in order to determine the area of watershed required to produce the maximum allowable street discharge. When this area is divided by the width of the watershed, it will give the length of the watershed from its approximate upstream end to the first storm -drain inlet. Check the watershed hydrology to ensure that the assumed five-minute time of concentration is correct. 10.25 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 294 of 395 X. STORM DRAINS For design discharges less than the 100-year flood, use appropriate ratios and procedures as outlined in Chapter IV of this Manual. 5. Choose a type of inlet that is appropriate for the location; and, using the appropriate procedures as described herein, develop a preliminary inlet design. Approximately 75 percent of the flow should be intercepted for maximum design efficiency. 6. Repeat Step Four to determine the distance to the next downstream inlet. Although not strictly accurate, the carry-over flow, Qco, is added directly to the discharge produced in the intervening watershed between the two inlets. In reality, there should be a lag in peaks, and the amount to be accepted by a downstream inlet should be determined by adding hydrographs. However, this procedure would soon become very tedious. In view of the fact that the times of concentration are generally small, and that the inlets are spaced close together, direct adding of peaks is acceptable, and provides a measure of safety to the final design of the inlets. 7. Steps Five and Six are repeated, as necessary, until all drainage is accounted for within the system. At this time, needed revisions may become apparent for practical or economic reasons. Revisions should be made, and standard designs chosen, for all inlets. If the standard designs differ from the preliminary designs, the procedure should be repeated with the standard designs in order to ensure that the system works properly. Work sheets for this procedure are presented in Figure 10.10, and an example is provided at the end of this chapter. 10.8 Storm -Drain Calculations The two simplest methods of hydraulic analysis for use in the design of storm drains are (1) the "normal -flow method", and (2) the "pressure -flow method". The "normal -flow method" is much simpler to utilize, but it is often inaccurate. Its use often results in undersized pipes --especially if there are manholes, bends, junctions, and transitions that create energy (head) losses in the storm drain. On the other hand, the "normal -flow method" could also result in the design of storm drains that are larger and more expensive than necessary --particularly if there is sufficient head to create higher than normal flow velocities. The pipe slope and the friction slope of storm drains designed for normal flow are assumed to be equal. It is therefore not necessary to calculate a hydraulic grade line for these storm drains if the soffits of connecting pipes of unequal size are set at the same elevation, and if the so-called "minor" head losses along the storm drain are minimal. A hydraulic grade line for pressure flow will need to be computed whenever there is a high tailwater; or when it is desired to determine the effects which occur when a larger than design -frequency storm occurs; or whenever minor losses or pipe alignment may induce pressure flow; or when it is desired to check to see if a smaller pipe size 10.26 Marana Town Council Regular Meeting Agenda Packet Page 295 of 395 November 19, 2024 PAVEMENT -DRAINAGE WORKSHEET LOCATION DATA: DESIGN DATA: Frequency Location: Project No: Tall Curb Height RUNOFF CALCULATIONS: n= Sheet 0f From Station To Station L ft. W ft. D.A. acre, Cu Tc min. I in/hr. 0100 cra 0 ign crs 0o r crs 0i cis S ft/ft S�c ft/ft Dft fC Tft INLET CALCULATIONS Station Inlet Type Y ft. 0' cts Oco = OT - O. Computed by: Figure 10.10: Pavement Drainage Worksheet Checked by: SNId2Ia WIIOIS 'X Marana Town Council Regular Meeting Agenda Packet Page 296 of 395 November 19, 2024 X. STORM DRAINS could be used under conditions of pressure flow. It will generally be a requirement to compute the design hydraulic grade line for any proposed storm drain. 10.8.1 Normal -Depth Calculations Normal -depth calculations are accomplished by using Manning's equation: Q = 2/3 1.486 [Al Si/2A n P ° Where: Q = Discharge, in cubic feet per second; A = Flow area within the pipe, in feet; n = Manning's roughness coefficient; P = Wetted perimeter of flow, in feet; and, S. = Pipe slope, in feet per foot. Figure 10.11 shows the relationship of these parameters for a circular conduit. 10.8.2 Pressure -Flow Calculations: Computation of Hydraulic Grade Line (10.27) Hydraulic grade -line computations for pressure flow are based on the Bernoulli equation. This equation is as follows: 2 V2 --+Dhgl+SoL=—+Dhg2+SiL+Hm 2g 2g (10.28) Where: Hm= "Minor" head losses, in feet, and all other terms are as defined by Figure 10.12. The hydraulic grade line is computed by starting with the control tailwater elevation at the drain outlet, and subsequently performing a hydraulic grade -line calculation in the upstream direction. Friction and minor losses are computed for each segment of the storm drain. These energy losses are added to the total energy elevation at the downstream endpoint of the storm -drain segment in order to obtain the total energy elevation at the upstream endpoint of the segment. The hydraulic grade line is equal to the total energy grade line, minus velocity head at any point along the storm drain. 10.28 Marana Town Council Regular Meeting Agenda Packet Page 297 of 395 November 19, 2024 X. STORM DRAINS 9 = COS-1 ( r rY-)(in rodions) A =r 2 (A -SING COSA) P =2r9 D = DIAMETER PIPE= 2r MAX 0 AT o = 0.938 MAX RAT p = 0.81 3 R= HYDRAULIC RADIUS= ÷ FIGURE 10.11 HYDRAULIC PARAMETERS OF A CIRCULAR CROSS SECTION V?/2g FIGURE 10.12 HEAD -LOSS DIAGRAM FOR PIPES 10.29 Sf L t Hr, V2 /2q Dhg2 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 298 of 395 X. STORM DRAINS 10.8.3 Friction Losses Friction losses, h f, are computed by Manning's equation for an assumed or given discharge. The form of Manning's equation used is: 29.2n2 V2 S (10.29) f R1.33 [2g 1 Where: R = Hydraulic radius (i.e., the cross -sectional area of flow divided by the wetted perimeter of flow), in feet. All other terms are as previously defined. The friction loss for a storm -drain segment is then computed by the following equation: hf = Sf L = Friction loss (10.30) 10.8.4 Minor Losses "Minor" losses in a storm drain are those that are associated with the energy necessary for the passage of water through areas such as junctions, manholes, and transitions. The total head loss is the sum of friction losses and minor losses. Minor losses, Hm, are normally represented as a factor K of velocity head: V2 Hm=K 1 8 (10.31) The factor K varies widely, depending on the type of loss (e.g., bend, entrance, junction, manhole, etc.) and the configuration of the particular structure creating the head Toss. A publication by the Denver Regional Council of Governments (1969) gives detailed information on minor losses, as do many hydraulics text books. It is important to note that these so-called "minor" losses can sometimes exceed friction losses within a storm -drain system, and therefore should always be evaluated at some point during the design process. Some of the more common minor losses encountered in storm -drain design are covered in the following sections. 10.8.5 Bend Losses Head -loss coefficients for pipe bends with a deflection angle of 90 degrees, Kbgo, can be determined from Figure 10.13. 10.30 Marana Town Council Regular Meeting Agenda Packet Page 299 of 395 November 19, 2024 VALUES OF K b 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 0 X. STORM DRAINS 2 3 4 5 6 7 8 RATIO r/D r = radius of of bend; D = diameter of circular section or side of square section FIGURE 10.13 HEAD -LOSS COEFFICIENT FOR 90° PIPE BEND 10.31 9 10 Marana Town Council Regular Meeting Agenda Packet Page 300 of 395 November 19, 2024 X. STORM DRAINS Kb90 for 90-degree, square elbows, where there is no rounding of corners of the intersecting conduits, ranges from 1.25 to 1.50. In cases of bends where the deflection is less than 90 degrees, determine the head -loss coefficients for bends as follows: Kb (For bend < 90°) = z 90 - deflection in degrees 90 Bend head loss, hb, is then: hb=Kb 2g 10.8.6 Junction Losses Kb90 (10.32) (10.33) Junction Iosses, hi, where the diameter of the main pipe does not change, shall be computed by: z VZ Vl A3I1 hi = - — - Cost 2g 2g A2g Figure 10.14A illustrates this type of junction. (10.34) In the case where D1 * D2, junction loss shall be calculated by the Thompson equation: 2 Q2V2 - Q1V1 - Q3V3Cos9 eHG = (10.35) Al+A2 g Figure 10.14B illustrates this type of junction. Where: eHG = Difference in hydraulic gradient for the two ends of the junction, in feet; 10.32 Marana Town Council Regular Meeting Agenda Packet Page 301 of 395 November 19, 2024 A JUNCTION E-- v2 X. STORM DRAINS FLOW Vl Di =D2 B JUNCTION C TRANSITION LDIRECTION OF FLOW V2 f 8 FIGURE 10.14 JUNCTION AND TRANSITION CONFIGURATIONS 10.33 Marana Town Council Regular Meeting Agenda Packet Page 302 of 395 November 19, 2024 X. STORM DRAINS Al = Flow area of mainline pipe upstream of the junction, in square feet; A2 = Area of mainline pipe downstream of the junction, in square feet; A3 = Area of tributary pipe, in square feet; Q1 = Discharge of mainline pipe upstream of the junction, in cubic feet per second; Q2 = Discharge of mainline pipe downstream of the junction, in cubic feet per second; Q3 = Discharge of tributary pipe, in cubic feet per second; Vl = Flow velocity in mainline pipe upstream of the junction, in feet per second; V2 = Flow velocity in mainline pipe downstream of the junction, in feet per second; V3 = Flow velocity in tributary pipe, in feet per second; and, 0 = The angle formed by the junction between the tributary pipe and the mainline pipe, in degrees. It is very important to note that AHG in this equation is the difference in hydraulic grade -line elevation, not the energy grade line. The total energy loss at the junction, hj, is represented by: V! VZ �=nHG+— - — 2g 2g Junction loss should always be applied at the upstream side of the junction. (10.36) At junctions where there is more than one tributary inflow, the computation of head loss becomes more complicated. In most simple cases, Equation 10.35 can be used by subtracting QnVnCos6 terms in the numerator for each junction pipe. A publication by the Denver Regional Council of Governments (1969) gives junction losses for many detailed examples found in storm -drain design. 10.8.7 Transition Losses Transition losses, ht, for velocities which increase in the direction of flow (i.e., a contraction) are to be calculated using the following formula: V; V2l ht,=0.1 -- 2g 2g (10.37) Where velocities decrease in the direction of flow (i.e., an expansion), the formula to be used is: 10.34 Marana Town Council Regular Meeting Agenda Packet Page 303 of 395 November 19, 2024 2 Vi VZ hte=0.2 -- 2g 2g X. STORM DRAINS (10.38) See Figure 10.14C for a diagram which illustrates how to calculate transition losses using Equation 10.36. 10.8.8 Manhole Losses For manholes with no change in pipe size or discharge, and where the flow is straight through, manhole losses, hmh, shall be computed by: __ VZ hmh Kmh 2g Where Kmh = 0.05. (10.39) Head loss for manholes where flow changes direction, but where there is no change in discharge or pipe size, should be determined from Figure 10.15. For manholes which contain junctions, or that have changes in pipe size, the head loss associated with these elements should be computed according to the guidelines for junction and transition losses, as presented within this chapter. This head loss should then be added to the head loss computed by use of either Equation 10.39 or Figure 10.15, in order to obtain the total head loss through these types of manholes. 10.8.9 Entrance and Outlet Losses Entrance losses, he, are calculated by the following equation: V2] he=Ke Zg Values for Ke are given by: TYPE OF INLET VALUE OF Ke Inward Projecting Sharp Cornered Bell Mouth (Beveled) 10.35 0.78 0.50 0.04 (10.40) Marana Town Council Regular Meeting Agenda Packet Page 304 of 395 November 19, 2024 X. STORM DRAINS E 0.8 1` z w U_ l.L U_ W 0 ( 0.6 0 1 0.4 0.2 0.0 0° — — I I I i I — — _ — I I I — — _ �- Bend no � at Manhole, Special Shaping Deflector �� { f I 1 I J _ _ Bend at Manhole, Curved or Deflector ( { _I1 — �CUd 6 _ Curved Sewer I r/D=2j I I I _ I I Sewer r/D>6 I 20° 40° 60° 80° DEFLECTION ANGLE,e, DEGREES FIGURE 10.15 MANHOLE HEAD LOSS I0.36 90° 100° Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 305 of 395 CULVERT OUTLET VELOCITY Less than 4 fps More than 4 fps and less than 10 fps More than 10 fps XI. CULVERTS SUGGESTED OUTLET PROTECTION No protection required Dumped rock riprap Wire -tied riprap If the velocity is greater than 10 fps, consider using a concrete energy dissipator, or increasing culvert size. 2. Structurally -designed downstream cut-off walls should be installed whenever the equilibrium channel slope is less than the existing channel slope. Refer to Chapter VI of this Manual for the sizing and spacing of cut-off walls. 3. Downstream embankment stabilization should be provided whenever the 100- year design flood overtops the roadway for a continuous period of time exceeding 10 minutes in duration (Pima County Department of Transportation and Flood Control District, 1984, P. VI-8). 11.5 Culvert vs. Bridge Crossings Sedimentation at culvert crossings may be a problem when the culvert cannot transport all of the sediment being delivered by the approach channel. In general, pipe culverts will transport less sediment than box culverts, and smooth pipes (e.g., concrete) will transport more sediment than corrugated metal pipes. However, the most effective method of eliminating sedimentation problems is to utilize a bridge structure which minimizes changes to the hydraulics or geometry of the approach channel. Equation 11.9 is provided as an aid to the engineer in determining if a particular culvert crossing may experience sediment deposition either within the culvert or at its entrance. Ns Where: Re = Qac = Qp = Sac = Sp = nac = 1.66 -1.55 0.91 Qac See nac Rac QP Sp nP RP Sediment -transport ratio (channel to culvert); Discharge in approach channel, in cubic feet per second; Total culvert discharge, in cubic feet per second; Longitudinal slope of approach channel, in feet/foot; Longitudinal slope of culvert, in feet/foot; Manning's roughness coefficient for the approach channel; 11.17 (11.9) Marana Town Council Regular Meeting Agenda Packet Page 306 of 395 November 19, 2024 XI. CULVERTS rp = Manning's roughness coefficient for the culvert; R� = Hydraulic radius of flow in approach channel, in feet; and, RP = Hydraulic radius of flow within the culvert, in feet. If the value 31. in Equation 11.9 is less than 1.0, the culvert will most likely be able to transport the sediment being delivered by the approach channel. If the value of 9i. is greater than 1.0, sedimentation may occur, and an alternate culvert or a bridge structure should be considered. The value of Sp in Equation 1I.9 should never exceed the critical slope of the culvert for the discharge involved. The culvert itself may be placed on a slope greater than critical, but critical slope should always be used in Equation 11.9 under such circumstances. Additionally, if tailwater exceeds the soffit of the culvert, then a hydraulic grade line should be calculated, and the friction slope of the culvert should be used in Equation 11.9. 11.6 At -Grade (Din) Crossings Crossings of watercourses which are designed to allow drainage to flow across roadways at -grade are commonly referred to as either at -grade or dip crossings. These "structures" are often used where strict all -weather -access criteria do not need to be met. Nevertheless, when flows pass over at -grade crossings, hazardous conditions may be created both during and immediately after such flows because of downstream erosion and/or sediment and debris buildup within the crossing itself. In order to minimize these hazardous conditions during and immediately after a flow event, the at -grade crossing should be built with a minimum four -percent cross slope, unless horizontal and vertical controls for traffic safety dictate otherwise, in order to reduce the potential for sedimentation within the crossing. The cross -slope should be accomplished by providing the vertical rise on the upstream side of the crossing, with the downstream side meeting existing grade (Pima County Department of Transportation and Flood Control District, 1984). At a minimum, a two -foot -deep cutoff wall should be placed along the upstream side of the at -grade crossing in order to protect the pavement edge from general scour. In addition, an adequately deep cutoff wall (i.e., based upon criteria contained within this Manual, but in no case less than three feet in depth), should be placed along the downstream side of the pavement in order to prevent erosion damage, due to local scour and channel degradation, from occurring immediately downstream of the at -grade crossing. 11.18 Marana Town Council Regular Meeting Agenda Packet Page 307 of 395 November 19, 2024 MARANA AZ ESTABLISHED 1 9 7 7 Council -Regular Meeting D1 Meeting Date: 11/19/2024 To: Mayor and Council Submitted For: Andrea De La Cruz, Assistant to the Town Manager From: Andrea De La Cruz, Assistant to the Town Manager Date: November 19, 2024 Strategic Plan Focus Area: Vibrant Community, Cherished Heritage Subject: Resolution No. 2024-104: Relating to Development; adopting the amended Town of Marana Public Art Policy (Andrea De La Cruz) Discussion: On September 19, 2023, the Town Council adopted the Town of Marana Public Art Policy. Since its adoption, the Marana Public Art Review Committee was created and has convened several times to identify future locations for public art and to evaluate the policy for clarity. The Committee, along with Town staff, identified sections of the policy that require revisions for better clarity and structure. The list below highlights and describes the proposed amendments to the Town of Marana Public Art Policy: • Allow either the Director or Deputy Director of Development Services, Parks and Recreation, and Public Works to serve as a member of the Committee at any meeting. • Remove the Town Engineer as a member of the Marana Public Art Review Committee and replace this position with an appointee designated by the Town Manager. • Establish a four-year term for public members serving on the Marana Public Art Review Committee. • Clarify that Capital Improvement Projects funded through restricted sources (such as impact fees, grants, or loans) are not required to contribute to the Marana Public Art Fund. Marana Town Council Regular Meeting Agenda Packet Page 308 of 395 November 19, 2024 Included within the packet are a clean copy of the amended policy and a redline showing the proposed changes to the policy. Staff Recommendation: Staff recommends approval of Resolution No. 2024-104 Suggested Motion: I move to adopt Resolution No. 2024-104; adopting the amended Town of Marana Public Art Policy. Attachments Resolution No. 2024-104 Exhibit A - Amended Public Art Policy Redline of Public Art Policy Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 309 of 395 MARANA RESOLUTION NO. 2024-104 RELATING TO DEVELOPMENT; ADOPTING THE AMENDED TOWN OF MARANA PUBLIC ART POLICY WHEREAS on September 19, 2023, the Town Council adopted Resolution No. 2023- 099 approving the Town of Marana Public Art Policy (the "Policy"); and WHEREAS since the adoption of the Policy, the Marana Public Art Review Committee (the "Committee") was created and has convened several times to identify future locations for public art and to evaluate the Policy for clarity; and WHEREAS the Committee, along with Town staff, identified sections of the Policy that require revisions for better clarity and structure; and WHEREAS the Town Council finds that adopting the amended Town of Marana Public Art Policy as set forth in this resolution is in the best interests of the Town and its citizens. NOW, THEREFORE, BE IT RESOLVED BY THE MAYOR AND COUNCIL OF THE TOWN OF MARANA, ARIZONA, that the amended Town of Marana Public Art Policy attached to this resolution and incorporated by this reference as Exhibit A is hereby approved and the Towri s Manager and staff are hereby directed and authorized to undertake all other and further tasks required or beneficial to carry out the Policy. PASSED AND ADOPTED by the Mayor and Council of the Town of Marana, Arizona, this 19th day of November, 2024. Mayor Ed Honea ATTEST: APPROVED AS TO FORM: David L. Udall, Town Clerk Jane Fairall, Town Attorney Resolution No. 2024-104 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 310 of 395 Exhibit A to Marana Resolution No. 2024-104 MARANA Z Title: Town of Marana Public Art Policy Effective Date: November 1, 2023 Approved: Council Resolution No. 2023-099 Revised: November 19, 2024 by Resolution No. 2024-104 Purpose The purposes of the Town of Marana Public Art Policy are to: ■ Identify community beautification opportunities that will strengthen Marana's identity, spirit, and pride; ■ Establish a Marana Public Art Fund; ■ Establish a Marana Public Art Review Committee; ■ Provide direction for the selection of high -quality public art. Definitions 1. Development Project: A project involving the issuance of a permit for construction or reconstruction, but not a permit to operate. 2. Marana Public Art Fund: Either a separate account within the Towri s General Fund or a separate book or ledger entry designation for funding public art on Town owned property or Town Capital Improvement Projects. 3. Public Art: Artistic creations of a professional artist within a public space or spaces. The artwork is typically large scale and may include sculpture, mosaic, painting, ceramic, video, photography, works of light, integrated artist designed land works, aesthetic landscaping and monuments, and other works determined by the Town to meet the requirements of the project. 4. Tenant Improvements: The customized alterations a building owner makes to rental space as part of a lease agreement, in order to configure the space for the needs of that particular tenant. For the purpose of this policy, tenant improvements shall exclude general maintenance and repair. - 1- TOWN OF MARANA PUBLIC ART POLICY Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 311 of 395 Marana Public Art Fund The Marana Public Art Fund is established and dedicated to funding high -quality public art installations, and maintenance, throughout the Marana community. Contributions to the Fund shall be collected from private developments and Town of Marana Capital Improvement Projects. Decisions on how to allocate the funds shall be made by the Marana Public Art Review Committee. Marana Public Art Review Committee The Marana Public Art Review Committee shall designate locations for public art installation and review design proposals according to the Marana Public Art Design Principles. The Marana Public Art Review Committee shall consist of seven members divided into two category types: - Town Representatives: • Director or Deputy of Development Services • Director or Deputy of Parks and Recreation • Director or Deputy of Public Works • Communications Manager • An appointee designated by the Town Manager For the Town Representative positions designated as either the Director or Deputy, either representative, but not both representatives, may attend and serve as a member at any Committee meeting depending upon availability. - Local Art Community Members: Two positions each serving a four-year term. These members may seek reappointment by submitting a new application upon completion of their term. Private Development Contributions Any development project that meets the following conditions shall contribute to the Marana Public Art Fund in the form of a cash donation: • New construction of a project containing 10,000 square feet or more net floor area of any commercial, industrial, or office use within any zoning district; or • Phased projects with one or more buildings that contain a total of 10,000 square feet or more net floor area of commercial, industrial, or office use within any zoning district; • New construction of any multi -family development site consisting of 50 or more units; 2 TOWN OF MARANA PUBLIC ART POLICY Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 312 of 395 ■ Tenant improvements of 10,000 square feet or more net floor area of any commercial, industrial, or office use within any zoning district. Commercial, office, and multi -family uses shall contribute 1% of the building permit valuation to the Fund. Industrial uses shall contribute 0.5% of the building permit valuation to the Fund. The contribution shall be collected at the time of the building permit issuance. If a development consists of multiple buildings, the property owners(s) shall contribute the appropriate amount with each building permit pulled. Where a building shell is constructed and tenant improvements are done separately, the building shell will be charged 50% of the applicable contribution requirement and tenant improvements will be charged the remaining 50%. Maximum Contribution The maximum contribution for any one private development project shall be $150,000. Town of Marana Capital Improvement Projects Contributions All Town of Marana Capital Improvement Projects (CIP) with an estimated budget of $500,000 or more shall include 1% of the total project cost as a contribution to the Marana Public Art Fund, except for projects funded via a restricted funding source that does not permit expenditures for public art (i.e., impact fees, grants, loans, etc.). The Public Works Director or designee will ensure that this 1% cost is added to the project's total budget. All or a portion of the contributions derived from the Marana Capital Improvement Project may fund artwork for the specific CIP project, or the balance of the funds may be deposited into the Marana Public Art Fund. Waiver: The Town Manager may waive the public art contribution requirement for projects that are determined to be solely maintenance obligations. Any waiver shall be made in writing and sent to Development Services to be placed in the project permit file. Designated Public Art Locations The Marana Public Art Review Committee shall identify locations for public art installations throughout the community. A list of locations, and priority ranking, will be presented to the Town Council for approval. The list of locations and priority ranking shall be updated as new facilities are accepted or as priorities change. Each installation shall allow for unrestricted viewing from a variety of vantage points. To ensure the general public has access, installations shall be within or adjacent to public parks, trails, or other publicly -owned property that is easily accessible and clearly visible to the general public. 3 TOWN OF MARANA PUBLIC ART POLICY Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 313 of 395 Public art installations shall not be located in a proposed or existing Town right-of-way unless the public art installation is intended to be part of a Capital Improvement Project, or as approved by the Town Engineer. Marana Public Art Design Principles The committee will use the following design principles in assessing Conceptual Art Proposals. 1. Design. Artwork should incorporate aspects of Marana's natural and cultural heritage and should be a "uniquely Marana" piece. 2. Quality. Artwork demonstrates originality, artistic quality, and excellence in design and artisanship, demonstrated through renderings, explanation of construction, materials, and artist resume. 3. Community Relevance. Artwork is appropriate in scale, material, form, and content for the immediate and general social, economic, and physical environments with which it is to relate. 4. Durability. Artwork demonstrates structural and surface integrity and permanence; material provides protection against theft, vandalism, weathering, and excessive maintenance and repair costs. 5. Safety. Artwork does not present a hazard or create unsafe conditions. 6. Diversity. Artwork contributes to a diversity of style, scale, media, artists, community values, and forms of expression within the Town. 7. Visibility. Artwork is visible and accessible for the purposes of public enjoyment and security, considering pedestrian and vehicular traffic, lighting, active hours on site, future development, and vegetation growth. 8. Feasibility. Artwork is likely to be successfully completed based on the project budget, timeline, artist's experience, soundness of materials, and any other relevant factors. 4 TOWN OF MARANA PUBLIC ART POLICY Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 314 of 395 MARANA AZ Title: Town of Marana Public Art Policy Effective Date: November 1, 2023 Approved: Approved by Council Resolution No. 2023-099 Purpose The purposes of the Town of Marana Public Art Policy are to: ■ Identify community beautification opportunities that will strengthen Marana's identity, spirit, and pride; ■ Establish a Marana Public Art Fund; ■ Establish a Marana Public Art Review Committee; ■ Provide direction for the selection of high -quality public art. Definitions 1. Development Project: A project involving the issuance of a permit for construction or reconstruction, but not a permit to operate. 2. Marana Public Art Fund: Either a separate account within the Town's General Fund or a separate book or ledger entry designation for funding public art on Town owned property or Town Capital Improvement Projects. 3. Public Art: Artistic creations of a professional artist within a public space or spaces. The artwork is typically large scale and may include sculpture, mosaic, painting, ceramic, video, photography, works of light, integrated artist designed land works, aesthetic landscaping and monuments, and other works determined by the Town to meet the requirements of the project. 4. Tenant Improvements: The customized alterations a building owner makes to rental space as part of a lease agreement, in order to configure the space for the needs of that particular tenant. For the purpose of this policy, tenant improvements shall exclude general maintenance and repair. - 1- TOWN OF MARANA PUBLIC ART POLICY Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 315 of 395 Exhibit A to Marana Resolution No. 2023-099 Marana Public Art Fund The Marana Public Art Fund is established and dedicated to funding high -quality public art installations, and maintenance, throughout the Marana community. Contributions to the Fund shall be collected from private developments and Town of Marana Capital Improvement Projects. Decisions on how to allocate the funds shall be made by the Marana Public Art Review Committee. Marana Public Art Review Committee The Marana Public Art Review Committee shall designate locations for public art installation and review design proposals according to the Marana Public Art Design Principles. The Marana Public Art Review Committee shall consist of seven members divided into two category types: - Town Representatives: • Director or Deputy of Development Services • Director or Deputy of Parks and Recreation • Director or Deputy of Public Works • Communications Manager • An appointee designated by the Town Manager For the Town Representative positions designated as either the Director or Deputy, either representative, but not both representatives, may attend and serve as a member at any Committee meeting depending upon availability. - Local Art Community Members: Two positions each serving a four-year term. These members may seek reappointment by submitting a new application upon completion of their term. Thc Marana Public Art Rcvicw Committcc shall dcsignatc locations for public art installation and review design proposals according to the Marana Public Art Dcsign Principles. Thc Marana Public Art Rcvicw Committee shall consist of the Town of Marana s Public Works Director, Town Engineer, Development Services Dircctor, Communications Manager, Parks & Recreation Dircctor, and two members of the local art community. Private Development Contributions Any development project that meets the following conditions shall contribute to the Marana Public Art Fund in the form of a cash donation: -2- TOWN OF MARANA PUBLIC ART POLICY Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 316 of 395 Exhibit A to Marana Resolution No. 2023-099 ■ New construction of a project containing 10,000 square feet or more net floor area of any commercial, industrial, or office use within any zoning district; or ■ Phased projects with one or more buildings that contain a total of 10,000 square feet or more net floor area of commercial, industrial, or office use within any zoning district; ■ New construction of any multi -family development site consisting of 50 or more units; ■ Tenant improvements of 10,000 square feet or more net floor area of any commercial, industrial, or office use within any zoning district. Commercial, office, and multi -family uses shall contribute 1% of the building permit valuation to the Fund. Industrial uses shall contribute 0.5% of the building permit valuation to the Fund. The contribution shall be collected at the time of the building permit issuance. If a development consists of multiple buildings, the property owners(s) shall contribute the appropriate amount with each building permit pulled. Where a building shell is constructed and tenant improvements are done separately, the building shell will be charged 50% of the applicable contribution requirement and tenant improvements will be charged the remaining 50%. Maximum Contribution The maximum contribution for any one private development project shall be $150,000. Town of Marana Capital Improvement Projects Contributions All Town of Marana Capital Improvement Projects (CIP) with an estimated budget of $500,000 or more shall include 1 % of the total project cost as a contribution to the Marana Public Art Fund, except for projects funded via a restricted funding source that does not permit expenditures for public art (i.e., impact fees, grants, loans, etc.). The Town EnginccrPublic Works Director or designee will as&urc ensure that this 1 % cost is added to the project's total budget. All or a portion of the contributions derived from the Marana Capital Improvement Project may fund artwork for the specific CIP project, or the balance of the funds may be deposited into the Marana Public Art Fund. Waiver: The Town Manager may waive the public art contribution requirement for projects that are determined to be solely maintenance obligations. Any waiver shall be made in writing and sent to Development Services to be placed in the project permit file. -3- TOWN OF MARANA PUBLIC ART POLICY Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 317 of 395 Exhibit A to Marana Resolution No. 2023-099 Designated Public Art Locations The Marana Public Art Review Committee shall identify locations for public art installations throughout the community. A list of locations, and priority ranking, will be presented to the Town Council for approval. The list of locations and priority ranking shall be updated as new facilities are accepted or as priorities change. Each installation shall allow for unrestricted viewing from a variety of vantage points. To assure ensure the general public has access, installations shall be within or adjacent to public parks, trails, or other publicly -owned property that is easily accessible and clearly visible to the general public. Public art installations shall not be located in a proposed or existing Town right-of-way unless the public art installation is intended to be part of a Capital Improvement Project, or as approved by the Town Engineer. Marana Public Art Design Principles The committee will use the following design principles in assessing Conceptual Art Proposals. 1. Design. Artwork should incorporate aspects of Marana's natural and cultural heritage and should be a "uniquely Marana" piece. 2. Quality. Artwork demonstrates originality, artistic quality, and excellence in design and artisanship, demonstrated through renderings, explanation of construction, materials, and artist resume. 3. Community Relevance. Artwork is appropriate in scale, material, form, and content for the immediate and general social, economic, and physical environments with which it is to relate. 4. Durability. Artwork demonstrates structural and surface integrity and permanence; material provides protection against theft, vandalism, weathering, and excessive maintenance and repair costs. 5. Safety. Artwork does not present a hazard or create unsafe conditions. 6. Diversity. Artwork contributes to a diversity of style, scale, media, artists, community values, and forms of expression within the Town. 7. Visibility. Artwork is visible and accessible for the purposes of public enjoyment and security, considering pedestrian and vehicular traffic, lighting, active hours on site, future development, and vegetation growth. -4- TOWN OF MARANA PUBLIC ART POLICY Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 318 of 395 Exhibit A to Marana Resolution No. 2023-099 8. Feasibility. Artwork is likely to be successfully completed based on the project budget, timeline, artist's experience, soundness of materials, and any other relevant factors. -5- TOWN OF MARANA PUBLIC ART POLICY Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 319 of 395 46,, MARANA AZ ESTABLISHED 1 9 7 7 Council -Regular Meeting D2 Meeting Date: 11/19/2024 To: Mayor and Council Submitted For: Terry Rozema, Town Manager From: Jane Fairall, Town Attorney Date: November 19, 2024 Strategic Plan Focus Area: Thriving Commerce, Vibrant Community, Cherished Heritage Strategic Plan Focus Area Additional Info: FOCUS AREA 1: CHERISHED HERITAGE Leverage the region's historic and cultural legacy to strengthen community character, increase community pride, and build heritage -driven tourism. Goal: PROVIDE LOCATIONS WHERE RESIDENTS CAN CELEBRATE AND LEARN ABOUT MARANA'S HISTORY AND TRADITIONS. STRATEGY: Develop strategies to leverage developments, public facilities, events, and amenities to embed heritage -related art features and cultural expression. FOCUS AREA 2: VIBRANT COMMUNITY Strengthen the sense of place and create opportunities for community connections. GOAL: ESTABLISH A STRONG SENSE OF PLACE THROUGH THE CREATION OF UNIQUE PUBLIC SPACES AND ARCHITECTURE THAT FOSTER COMMUNITY PRIDE STRATEGY: Build a Marana-wide lifestyle brand that reflects Marana's unique character and identity. FOCUS AREA 3: THRIVING COMMERCE Recruit and maintain a diverse commercial sector that is supported by local workforce training and funding opportunities. Goal: PROVIDE A SUPPORTIVE ENVIRONMENT FOR INDUSTRY LEADERS, STARTUPS, SMALL BUSINESSES, AND ENTREPRENEURS THROUGH EVERY STAGE OF BUSINESS DEVELOPMENT. STRATEGY: Evaluate and implement economic development tools and strategies to support the retention and expansion of Marana key employers and attract new compatible sectors. STRATEGY: Develop a conceptual vision, design standards, and implementation strategy for Downtown Marana. Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 320 of 395 Goal: EXPAND MARANA'S THRIVING TOURISM INDUSTRY BY PROMOTING ITS HERITAGE, CULTURAL RESOURCES, SCENIC OPEN SPACES, AND SIGNATURE EVENTS. STRATEGY: Expand Marana's tourism efforts and enhance its regional relevance through a comprehensive assessment of the Town's strengths and unique offerings. STRATEGY: Continue to enhance visitor experiences and partner with stakeholders to promote Marana's entertainment, recreation, sports and cultural events, and hospitality venues Subject: Relating to Economic Development; discussion and consideration of proposal from Marana Urban LLC in response to Town of Marana Request for Proposals (RFP) for Lease and Development of Town -Owned Property Located at Marana Main Street and Civic Center Drive and possible direction to staff to commence negotiations for a lease agreement (Terry S. Rozema) Discussion: On May 17, 2024, the Town released a Request for Proposals (RFP) for the Lease and Development of Town -Owned Property Located at Marana Main Street and Civic Center Drive. The Town sought proposals from developers to lease and develop approximately 19 acres of Town -owned land as part of a vibrant Downtown Marana. As noted in the Town's Economic Development Strategic Plan: "Across the entire world, a community's downtown personifies its window to the world. Downtowns are not only how the world sees a community, they also represent the heart and soul of the people and businesses who call that community home. Downtown is a vital intersection of business, commerce, tourism and cultural exchanges and serves as a fundamental cornerstone for the community's economy and identity. A vibrant and healthy downtown benefits all citizens and businesses of Marana." The Town of Marana has a unique opportunity to build its downtown from the ground up and seeks a creative and innovative partner to help bring the Town's vision to life. As the RFP detailed, the Town seeks a developer who will enter into a long-term lease of up to 50 years, with potential options for renewal, to develop the property located adjacent to the Town's Marana Municipal Complex, east of Marana Main Street and north of Civic Center Drive. The developer must commit to long-term investment in the property and in the development of Downtown Marana. The successful proposer must be the primary developer of the property and will be responsible for securing long-term tenants, if applicable. The Town's goals for development of the property include: • Spurring development of Downtown Marana • Stimulating economic development and expanding employment opportunities in the Town • Complementing other nearby retail, academic, residential, and professional office development with a vibrant downtown area • Expanding entertainment and dining options by providing more variety, as well as providing amenities desirable to attract and retain the employees sought by Marana Town Council Regular Meeting Agenda Packet Page 321 of 395 November 19, 2024 employers in Southern Arizona • Generating new tax revenues The Town desires for the development of the property to be initiated and completed within a reasonable time period acceptable to the Town. The lease agreement ultimately negotiated between the Town and the successful developer will include timelines for development of the property and provisions that allow the Town to terminate the lease agreement if development timelines are not met. The Town received one proposal in response to the RFP, from Marana Urban LLC. An evaluation committee consisting of Town staff from Development Services, Economic Development, Town Manager's Office, Water, and Legal evaluated the initial response and submitted additional clarifying questions to the proposer. Marana Urban responded to those additional questions and also provided a preliminary infrastructure cost estimate for the Downtown Marana development. The RFP provides that once the evaluation committee process has been completed, a recommendation will be submitted to the Town Council. If the Town Council approves the recommendation, Town staff will commence negotiations with the successful proposer on the final form of lease agreement. No binding contract will be formed until the lease agreement is finalized and approved by the Town Council. Negotiations may be terminated by the Town and its designated representatives at any time for any reason(s) the Town deems appropriate. At this time, the evaluation committee recommends that the Council direct staff to begin negotiations with Marana Urban LLC on a final form of lease agreement for the Town -owned property subject to the provisions of the RFP. Attached to this report are the following documents: • RFP 2024-015 Lease and Development of Town -Owned Property Located at Marana Main Street and Civic Center Drive • Marana Urban LLC's July 11, 2024 submittal in response to the RFP • Marana Urban LLC's September 10, 2024 response to follow-up questions • Marana Urban LLC's October 31, 2024 preliminary infrastructure cost estimate Financial Impact: There is no immediate financial impact associated with tonight's item, which is the consideration and possible approval to proceed with negotiations. The complete financial impact will be dependent on the benefits and obligations described in the final, negotiated lease. We do, however, anticipate that the Town will have some obligation to either construct or reimburse the developer for certain public infrastructure elements within the public rights -of -way including, but not limited to, parking, road infrastructure, landscaping, lighting and illuminated signage. Town benefits and obligations of the final, negotiated lease will be budgeted in future years as part of the annual budget process. Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 322 of 395 Staff Recommendation: Staff recommends that Council direct staff to commence negotiations with Marana Urban LLC for a lease agreement for the lease of Town -owned property located adjacent to the Towri s Marana Municipal Complex, east of Marana Main Street and north of Civic Center Drive. Suggested Motion: I move to direct staff to commence negotiations for a lease agreement with Marana Urban LLC for the lease and development of Town -owned property located at Marana Main Street and Civic Center Drive. Attachments RFP 2024-015 Marana Urban LLC Response to RFP 2024-015 Marana Urban Response to Follow-up questions Marana Urban Preliminary Cost Estimate Map of Parcel Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 323 of 395 Solicitation Number: Solicitation Title: Release Date: Final Date for Inquiries: Due Date and Time: Submittal Location: Contact for Inquiries: MARANA FINANCE TOWN OF MARANA REQUEST FOR PROPOSALS (RFP) 2024 - 015 Lease and Development of Town -Owned Property Located at Marana Main Street and Civic Center Drive May 17th, 2024 June 20th, 2024, at 3:00pm Arizona time July 11th, 2024, at 3:00 pm Arizona time Marana Municipal Complex First Floor Reception Desk 11555 W. Civic Center Drive Marana, AZ 85653 Vicky Edwards / Rudy Torres Procurement Officers 11555 W. Civic Center Drive Marana, Arizona 85653 (520) 382-2642 vedwards@maranaaz.gov and rtorres@maranaaz.gov This solicitation is available at www.PublicPurchase.com. All prospective proposers are responsible for obtaining the RFP and any subsequent related documents from the Towri s partner: www.PublicPurchase.com. This system provides automatic notification and transmittal of solicitation opportunities. To view a solicitation, you must be registered with Public Purchase. The Town will not be responsible for the failure of a prospective proposer to obtain addenda and other information related to this RFP. Published: Daily Territorial on May 17th, 2024, and May 21st, 2024 Page 1 of 12 RFP 2024-015: Lease & Developmeittlf$DT w council Regular Meeting Agenda Packet & Civic Center D j?age 324 of 395 November 19, 2024 Table of Contents Schedule - 3 - Instructions to Proposers - 4 - Evaluation Criteria - 8 - Requirements Specific to Evaluation Criteria - 8 - Evaluation Process - 11 - RFP Signature Page - 12 - Page - 2 - of 12 RFP 2024-015: Lease & Development of Town -Owned Property/Marana Main St. & Civic Center Dr. Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 325 of 395 Schedule Released May 17th, 2024 Final Date for Inquiries June 20th, 2024, at 3:00pm Arizona time Due Date and Time July 11th, 2024, at 3:OOpm Arizona time Evaluation To be determined Lease Award To be determined All inquiries regarding this RFP shall be directed to the Solicitation Contact for Inquiries identified on page 1 of this solicitation. Page - 3 - of 12 RFP 2024-015: Lease & Development of Town -Owned Property/Marana Main St. & Civic Center Dr. Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 326 of 395 Instructions to Proposers 1. Preparation of Proposal: a. There is no prescribed format for proposals, but all proposals must include the required information necessary to adequately respond to this Request for Proposal. b. Faxed or e-mailed proposals will not be considered. c. Periods of time, stated as a number of days, will be calendar days. d. It is the responsibility of all proposers to examine the entire Request for Proposal package and seek clarification of any item or requirement that may not be clear and to check all responses for accuracy before submitting a proposal. 2. Proposal Packet: a. Proposals shall be submitted in one original and two hard copies in a sealed envelope, along with one electronic copy on a CD or flash drive. The original shall be marked "ORIGINAL". Detailed written responses shall be on 81/2" x 11" paper, using a font no smaller than 12 point. b. The proposer's name and address must appear on the outside of the sealed envelope, which shall be clearly marked as: Lease and Development of Town -Owned Property Located at Marana Main Street and Civic Center Drive - RFP #2024-015. c. All proposals must include the signed RFP Signature Page. 3. Inquiries: Any question related to the Request for Proposals must be directed to the contact whose name appears on the cover page. 4. Irrevocable Offer: A proposal is an offer to contract with the Town based upon the terms, conditions and specifications contained in this RFP and all addenda thereto, and the proposal. No contractual relationship will be established until the proposer has signed and the Town Council has approved, at a public meeting in compliance with the Arizona Open Meeting law, an agreement between the Town and the proposer. To allow for an adequate evaluation, the proposal shall be considered valid and irrevocable for 180 days after the Proposal Due Date and Time indicated on the cover of this RFP. 5. Withdrawal of Proposal: At any time prior to the specified proposal due date and time, a proposer may withdraw the proposal in writing. 6. Cost of Proposal Preparation: The Town will not reimburse proposers for the cost of developing, presenting, or providing a proposal. 7. Public Record: Properly submitted proposals will not be returned to proposers. All proposals will become the property of the Town and will, after approval of an agreement by the Town Council as a result of this RFP, become public records available for public inspection in accordance with Town policy and state law. The proposer must clearly label any portions of the proposal that it deems confidential or proprietary. If the Town receives a public records request to which such portions are responsive, the Town will promptly notify the proposer. The Town will disclose those portions to the requesting party unless the proposer obtains an order from a court of competent jurisdiction, within ten days after the Towri s notice to the proposer, that prohibits the Town from doing so. Page-4- of 12 RFP 2024-015: Lease & Development of Town -Owned Property/Marana Main St. & Civic Center Dr. Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 327 of 395 8. Applicability of Procurement Code. Except for Article III (Ethics), the Towri s Procurement Code does not apply to this RFP. This RFP is governed by the terms stated in this RFP and any applicable law. 9. Additional Information: Notwithstanding any other provision of this Request for Proposals, the Town expressly reserves the right to: a. Select one or more respondents with whom the Town may pursue negotiations pursuant to this Request for Proposals. b. Reject any or all proposals for whatever reason deemed necessary or for no specified reason. c. Amend or otherwise modify or cancel this Request for Proposals with or without substitution. Page - 5 - of 12 RFP 2024-015: Lease & Development of Town -Owned Property/Marana Main St. & Civic Center Dr. Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 328 of 395 A. Purpose The Town of Marana seeks proposals from developers to lease and develop approximately 19 acres of Town -owned land as part of a vibrant Downtown Marana. As noted in the Town's Economic Development Strategic Plan: Across the entire world, a community's downtown personifies its window to the world. Downtowns are not only how the world sees a community, they also represent the heart and soul of the people and businesses who call that community home. Downtown is a vital intersection of business, commerce, tourism, and cultural exchanges and serves as a fundamental cornerstone for the community's economy and identity. A vibrant and healthy downtown benefits all citizens and businesses of Marana. Marana, Arizona: Honoring Our Heritage. Heralding the Future. An Economic Development Strategy for Marana, AZ, IO. Inc., p. 21. The Town of Marana has a unique opportunity to build its downtown from the ground up and seeks a creative and innovative partner to help bring the Town's vision to life. B. Background Information The Town of Marana, incorporated in 1977, is a rapidly growing community located in Southern Arizona between Phoenix and Tucson. The population of the Town per the 2020 Census was 51,908, having grown at least 43% from the 2010 Census. Current estimates place the Town's population at approximately 60,000 residents. The Town covers approximately 121 square miles, resides in two counties (Pima and Pinal), and spans 18 miles of Interstate 10. Three mountain ranges hug the outer borders of the Town, the Tortolita Mountains to the northeast, Ironwood Forest National Monument to the west, and the Saguaro National Park to the south. C. Scope The Town of Marana seeks proposals from developers to lease and develop approximately 19 acres of Town -owned land located adjacent to the Town's Marana Municipal Complex, east of Marana Main Street and north of Civic Center Drive. A map of the property is included as Appendix A. The property is bisected by an El Paso Natural Gas (EPNG) utility easement. The property is also located in two Federal Emergency Management Agency (FEMA) Flood Hazard Zones: Zone AO 1 (90.25% or about 17.23 acres), Zone X - Shaded (9.75% or about 1.86 acres). Development of the property must comply with any applicable limitations imposed by the EPNG easement and the FEMA Flood Hazard Zones. The property is zoned SP - Specific Plan and is part of the Rancho Marana West Town Center Specific Plan Amendment implemented by the June 17, 2008 adoption of Marana Ordinance No. 2008.14. The Specific Plan was amended on March 21, 2023, by adoption of Marana Page - 6 - of 12 RFP 2024-015: Lease & Development of Town -Owned Property/Marana Main St. & Civic Center Dr. Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 329 of 395 Ordinance No. 2023.007. The 2023 amendment updated development and architectural standards for commercial uses. The Rancho Marana West Town Center Specific Plan Amendment implements the Town Center concept for the Town of Marana, as an activity center with a comprehensive mixed -use environment including commercial, retail, office, institutional, entertainment, and residential uses. The Town Center is planned to be the focus of civic activities for the residents of Marana. A variety of uses will be organized around public open spaces in a high -intensity and multi -story development setting. The Town Center encourages development of compact, pedestrian -scaled, mixed -use commercial and neighborhood areas. Consistent with the Town Center concept, in October 2023, the Town began construction of the new Marana Community & Aquatic Center (MCAC). The MCAC will be located at 13455 N. Marana Main Street, on the east side of Marana Main Street, across the street from the 19-acre parcel that is the subject of this Request for Proposals. The MCAC will be a cornerstone of development in the Downtown Marana area, bringing citizens from all over Marana to its state-of-the-art gymnasium, aquatic center, and gathering facilities. The Town seeks a developer who will enter into a long-term lease of up to 50 years, with potential options for renewal, to develop the property as part of a vibrant Downtown Marana. The developer must commit to long-term investment in the property and in the development of Downtown Marana. The successful proposer must be the primary developer of the property and will be responsible for securing long-term tenants, if applicable. The Towri s goals for development of the property include: • Spurring development of Downtown Marana • Stimulating economic development and expanding employment opportunities in the Town • Complementing other nearby retail, academic, residential, and professional office development with a vibrant downtown area • Expanding entertainment and dining options by providing more variety, as well as providing amenities desirable to attract and retain the employees sought by employers in Southern Arizona • Generating new tax revenues The Town desires for the development of the property to be initiated and completed within a reasonable time period acceptable to the Town. The lease agreement ultimately negotiated between the Town and the successful developer will include timelines for development of the property and provisions that allow the Town to terminate the lease agreement if development timelines are not met. The Town has had the property appraised and the appraiser's opinion of fair market rental value is $0.26 per square foot. While a developer's rent proposal will be a factor in evaluation of proposals, it is not dispositive. The Town Council has authority under A.R.S. §9-500.11 to Page -7-of12 RFP 2024-015: Lease & Development of Town -Owned Property/Marana Main St. & Civic Center Dr. Marana Town Council Regular Meeting Agenda Packet Page 330 of 395 November 19, 2024 engage in any activity that it "has found and determined will assist in the creation or retention of jobs or will otherwise improve or enhance the economic welfare of the inhabitants" of the Town, including specifically "the acquisition, improvement, leasing or conveyance of real or personal property." Evaluation Criteria The proposals will be evaluated based on the below criteria. The Town has not assigned numerical weighting to the criteria as the Town will evaluate proposals based on the totality of the circumstances. 1. Project Description 2. Qualifications & Experience 3. Project Delivery Approach 4. Business Plan 5. Lease and Rent Proposal Requirements Specific to Evaluation Criteria 1. Project Description a. Executive Summary: Include a summary of the entire proposal describing the most important elements of the proposal. b. Land Use/Site Plan: Include a conceptual site plan and building elevations for the development of the property. c. Proposed Development Elements: Describe the proposed mixed uses planned for the project site. Describe the conceptual mix of uses onsite, including how commercial retail, restaurant, or other uses will be balanced amongst themselves and complement one another. Provide breakdown by square footage and percentage of total buildable area. Discuss mix of elements such as multi -family, office, retail usage by local, regional, or national chain, and how that is determined. Briefly detail any discussion and coordination that has already occurred with potential occupants and users. d. Circulation: Provide circulation plan(s) showing transit, vehicular, bicycle and pedestrian access and circulation within and around the project site for the various existing and proposed users. e. Infrastructure: Describe infrastructure included in the project, including utilities, site access/ egress, and any other supporting elements necessary to have the site function. f. Local Impacts: Describe how the proposed uses fit within the immediate neighborhood location and how it will serve the neighborhood and local area. In particular, describe how the proposed development complements or leverages current or future development in the area. g. Schedule: Include a tentative proposed schedule for construction of improvements and investments in the property, taking into account the Towri s desire to have the Page - 8 - of 12 RFP 2024-015: Lease & Development of Town -Owned Property/Marana Main St. & Civic Center Dr. Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 331 of 395 project initiated and completed within a reasonable time period acceptable to the Town. i. Provide a schedule for the design and construction of the project. Include the time frames for those steps deemed critical to initiate immediately following award, if the lease is awarded to proposer. ii. Provide separate information regarding the timing of the various planned structures, site development and shared spaces. Indicate phasing of these elements based on the level of support to the anchor elements and location within the conceptual site plan. h. Economic Impact to Town: Describe the potential economic impact and benefits to the Marana community of the proposed project, including how the project will achieve the Towri s goals for development of the property as described in the Scope, above. 2. Qualifications & Experience a. Identification of the Lead Entity, including: i. Legal name and address of organization or individual proposing to lease the property. ii. Legal form of organization (e.g. partnership, corporation, non-profit status, etc.), with supporting documentation, such as articles of incorporation. If joint venture, identify the members of the joint venture and provide all information required within this section for each member. iii. Disclosure of "parent company" if proposer is a wholly -owned subsidiary (or subject to other partnerships). iv. Physical address(es) of office(s) working on this project. v. Name, title, address, email, and telephone number of the person to serve as project manager and a proposal contact (if different). b. Experience i. Describe the development team's experience in developing similar projects. ii. Provide information regarding at least two representative projects completed by the development team, that demonstrate the proposer's capacity to deliver the project as described. iii. Describe the development team's capacity and intent to proceed without delay if awarded the lease. iv. Include resumes for key personnel as attachments. 3. Project Delivery Approach a. Proposed Method to Accomplish the Work i. Briefly describe the proposer's technical and management philosophy regarding the successful development of property. ii. Describe how the proposer will attract and retain businesses and tenants for the development. iii. Describe how the proposer will work with the Town of Marana to promote Town programs and special events in coordination with the development. b. Knowledge an Understanding of the Local Environment Page - 9 - of 12 RFP 2024-015: Lease & Development of Town -Owned Property/Marana Main St. & Civic Center Dr. Marana Town Council Regular Meeting Agenda Packet Page 332 of 395 November 19, 2024 i. Express and demonstrate a knowledge and understanding of the local environment and culture by describing the proposer's experience with the Tucson Metro community and how the proposer plans on maintaining an open local presence while working with Town of Marana staff. ii. Display an understanding of the proposed Downtown Marana area and its vicinity, as part of a vibrant destination center with a complement of unique dining and entertainment experiences. 4. Business and Financial Plan a. Preliminary Project Business Plan i. Submit a business and financial plan for the project. ii. Demonstrate the developer's business and financial resources to meet the development goals as stated in the Scope, above. iii. Demonstrate a balanced business plan that identifies potential project revenues and expenses. iv. If the project is to be developed in phases, describe the timing and triggers for each phase. b. Financial Capacity i. Describe the developer's financial capacity to execute, complete, and operate the project successfully. ii. Provide credit and business references. c. Business Revenue Risk i. Describe the plan for long-term success. ii. Describe how the project is sustainable over the long term. 5. Lease and Rent Proposal a. Lease Proposal i. Describe the proposed lease term. ii. Describe any public improvements to the property the developer proposes the Town complete as part of the lease agreement. iii. Describe any other terms or conditions of the lease relevant to the developer's proposal. b. Rent Proposal i. Provide a rent proposal based on the totality of the circumstances, including the proposer's review of the Town appraiser's opinion of rental value. ii. Describe the rent structure, including any proposals for reduced or graduated rates during different phases of the project, based on a reasonable rate of return for the developer. c. Gift Clause Considerations i. Describe how the lease and rent proposal complies with the Arizona Gift Clause (Gift Clause, Ariz. Const. art. IX, § 7) in light of recent caselaw, including Schires v. Carlat, 250 Ariz. 371, 374, 480 P.3d 639, 642 (2021) and Neptune Swimming Foundation v. City of Scottsdale, -- Ariz. --, 542 P.3d 241 (2024). Page -10- of 12 RFP 2024-015: Lease & Development of Town -Owned Property/Marana Main St. & Civic Center Dr. Marana Town Council Regular Meeting Agenda Packet Page 333 of 395 November 19, 2024 Evaluation Process The Town will appoint an Evaluation Committee, which will conduct the selection process generally according to the schedule listed on the cover page of this RFP and in accordance with the terms of this RFP. The Town may conduct discussions/clarifications with any responsible proposer to assure full understanding of the proposer's proposal and its conformance to the RFP requirements and to clarify proposal details provided that they do not substantially change the content of the proposal. The Town does not intend to conduct interviews, but reserves the right to short-list proposers and conduct interviews if determined in the best interest of the Town. If the Town holds interviews or requests clarifications from short-listed proposers, the Town will issue a written request for Best and Final Proposal setting forth the date, time, and place for submission. If a proposer fails to respond to the request for Best and Final Proposal or fails to submit a notice of withdrawal, the Town will consider their immediate previous proposal as their Best and Final Proposal. After the evaluation process has been completed, a recommendation will be submitted to the Town Council for approval. If the Town Council approves the award recommendation, Town staff will commence negotiations with the successful proposer on the final form of lease agreement. No binding contract will be formed until the lease agreement is finalized and approved by the Town Council. Negotiations may be terminated by the Town and its designated representatives at any time for any reason(s) the Town deems appropriate. Page -11-of12 RFP 2024-015: Lease & Development of Town -Owned Property/Marana Main St. & Civic Center Dr. Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 334 of 395 RFP Signature Page The proposer must sign this Signature Page. In the absence of any exceptions identified in the proposal, the proposer will be bound by all of the terms and conditions outlined in the RFP. TO THE TOWN OF MARANA: The undersigned represents that he or she: 1. Is duly authorized to make binding offers on behalf of the proposer. 2. Has read and understands all information, terms, and conditions in the RFP. 3. Has not engaged in any collusive actions with any other potential proposers for this RFP. 4. Hereby certifies that the proposer takes no exception(s) to any portion of the RFP, unless an exception(s) is specifically noted in the proposal. For Clarification of this Offer contact: Proposer Name Name Address Title City State ZIP Phone Signature of Person Authorized to Sign/Date Fax Printed Name Email Title Page -12-of12 RFP 2024-015: Lease & Development of Town -Owned Property/Marana Main St. & Civic Center Dr. Marana Town Council Regular Meeting Agenda Packet Page 335 of 395 November 19, 2024 17370110 217370 21737073C 21737067A ZONE AO 1 ZONE X - SHADED Meeting'Agenda P 217370 0 Appendix A Duo MARANA . , �'. - C a 75 150 225 21737053A 300 Feet Default Folder: U:1Towi;_: 2024\E1 Paso Gu)_FEMA_Zones RFP 2024-015 Lease and Development of Town -Owned Property Located at Marana Main Street and Civic Center Drive Prepared for Submittal Date Submitted by Town of Marana 07.11.2024 Marana Urban Marana Urban LLC AyArchitecture MadiVgrown Council Regular Meeting Agenda Packet November 19, 2024 Page 337 of 395 Table of Contents 1 Project Description 2 Qualifications & Experience 3 Project Delivery Approach 4 Business Plan 5 Lease and Rent Proposal Marana Urban LLC A> 1 S Architecture Ma46"'own Council Regular Meeting Agenda Packet November 19, 2024 Page 338 of 395 2 1 Project Description Marana Urban LLC AyI S Architecture Ma46"'own Council Regular Meeting Agenda Packet November 19, 2024 Page 339 of 395 3 1. a. Executive Summary "Our downtown" Our desire is to design and deliver a world -class, full -service downtown. It will capture Marana's rich history and highlight Marana's bright future. At its core will be a curved, brick covered street that is framed by an arch with Marana proudly sitting at the top. Stepping through the arch begins the experience of downtown Marana. The road to creating a ground up downtown of this caliber will be incremental. Every phase is a building block for the next. Corners cannot be cut. Building materials will be carefully selected so they age properly adding value as the years pass. The scale must provide the precise balance of high density tempered by soft landings and charming streets. Art is essential. It is the glue that stitches the buildings, the streets and the story together. Our firm has controlled 40 acres to the north of the Town's 19 acres for the past 15 years. We see this request as an opportunity to jointly develop our properties. This increases the probability of self-sufficiency within the neighborhood. A key governor of our success is determining the appropriate size of each phase. Current, local demand exists. The catalyst for subsequent phases will come from demand that will be increased by a downtown that acts and feels like home. Marana Urban LLC A Y I S Architecture Mai*a4f"I'own Council Regular Meeting Agenda Packet November 19, 2024 Page 340 of 395 4 1. b. Land Use / Site Plan The proposed project is envisioned as the first step on a journey towards a vibrant new entertainment district. This proposed phase one begins with the first portion of an arcing street, extending from Bill Gaudette Drive towards the northeast; in time this street should extend to loop back to meet N Marana Main Street south of W Grier Rd. A sense of arrival is to be established by an arch spanning the street, proclaiming the town's name in lights and demarcating the transition from the public road network to a primarily pedestrian environment. Eventually, this arch should be joined by another at the north end of the street, bookending the entertainment quarter. In the era of social media, this landmark arch also creates an opportunity for news of this emerging phenomenon to be spread by enthusiastic visitors to their friends and followers. This development is encumbered by a substantial easement, but the proposed project seeks to turn this constraint into an opportunity. The proposed first phase comprises two buildings of modest size, in conversation across the easement, re -imagined as a public plaza. The project seeks to deploy native trees and shade structures to temper the heat naturally, including trees in removable planters where necessary atop the easement. The proposed buildings, both in the first phase and the eventual full build -out, will be designed to be flexible in their use, and to reflect the best of southern Arizona architecture through traditional forms and a palette of durable, hard wearing materials; primarily red brick. In the short term, a gravel lotto the south of the new street will provide ample parking for visitors. In the long term, two large parking lots are envisioned, one each at the north and south entrances to the district. A multi -use path which allows for a continuous loop around the perimeter of the 20 acres is planned, with connections to the businesses and amenities at key locations. Marana Urban LLC A Y I S Architecture Mai*a4f"I'own Council Regular Meeting Agenda Packet November 19, 2024 Page 341 of 395 5 Pictured Above: Site orientation diagram. Marana Urban LLC AXIS Architecture + Design South 20 Acres Marana Town Council Regular Meeting Agenda Packet November 19, 2024 N Marana Main St N Sandario Rd zD Page 342 of 395 111 MIXED -USE RETAIL & RESIDENTIAL MID DENSITY RESIDENTIAL LOW DENSITY RESIDENTIAL ■ RETAIL ■ HOTEL POSSIBLE HOTEL LOCATION PUBLIC MARKET w/ RESIDENTIAL ABOVE ■ GREEN SPACE IIIPEDESTRIAN PASEO . 5 LEVEL PARKING GARAGE SURFACE PARKING ■ DESTINATION ANCHOR • RODEO CORRAL ENTERTAINMENT El CIVIC BUILDINGS COMMUNITY CENTER HEALTH SERVICES 1 BILLBOARD 0 00 0 W L—J LJ I Proposed Phase One Site Concept Graphic by ELS Architecture and Urban Design, modified by AXIS Architecture + Design Marana Urban LLC A X lc Architecture Mar*igfbwn Council Regular Meeting Agenda Packet November 19, 2024 Page 343 of 395 Pictured Above: Conceptual site plan of full development. Marana Urban LLC A) I S Architecture + Design Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 344 of 395 Pictured Above: Conceptual overview of full development. Marana Urban LLC A X I S Architecture + Design Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 345 of 395 MARANA In due course, it is envisioned that additional buildings will join the first phase, including food and beverage, entertainment, select retail, and a hotel. The desire is to create a place where the spaces between buildings are as lively and active, if not more so, than the buildings themselves. Architectural, landscape, and urban design seek to accommodate indoor -outdoor connections, curbside, covered, and outdoor dining, and entertainment programming including live music, parades and national holidays, public art, and gymkhana barrel racing. The project seeks to leverage thoughtful design, a tremendous opportunity afforded by the Town and the setting, and demand for future development stoked by a purposeful initial investment, to create a uniquely vibrant and walkable entertainment district for the community. Pictured above: Artist's impression of billboard. Marana Urban LLC A Y I S Architecture Ma46-Frown Council Regular Meeting Agenda Packet November 19, 2024 Page 346 of 395 10 Design Inspiration and Reference Imagery Marana Urban LLC AXISArchitecture MaffIrown Council Regular Meeting Agenda Packet November 19, 2024 Page 347 of 395 11 Design Inspiration and Reference Imagery Ay IC Architectre Marana Urban LLC' -0 Mai*iffIrown Council Regular Meeting Agenda Packet November 19, 2024 Page 348 of 395 12 Pictured Above: Conceptual rendering of Marana Arch, curved street, and future Hotel. Marana Urban LLC AXIS Architecture + Design Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 349 of 395 Pictured Above: Conceptual rendering of curved street, phase one food and beverage (page right) and future additional food and beverage (page left). Marana Urban LLC AXIS Architecture + Design Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 350 of 395 1. c. Proposed Development Elements The attached conceptual site plan includes a design for 59 acres. Our intent is to begin phase one on the Town's 19 acres. The adage, "walk before we run" will be a guidepost. Each phase will provide critical experience to determine what future phases will be. Each phase will be a teacher. The attached plan will undoubtedly change. The goal for a downtown built form the ground up of this caliber is ambitious. We cannot say with any certainty what the final chapter will be. We can focus on each step and build a foundation, together. Phase one is illustrated in the attached plans. Marana Arch, a portion of the curved brick road, two restaurants with courtyards, parking and the beginning of the El Paso easement softscape will be how we would like to start. An iconic, well lit, entry monument/sign clearly visible from 1-10 is a crucial part of phase 1. It will likely sit on the northeast corner of the north parcel. It is too early to build hotel, residential or larger entertainment/hospitality without sacrificing quality. Each restaurant in phase one will be approximately 7,500 square feet including the courtyard. Approximately 200 surface parking spaces will be located nearby. The Marana arch is critical to setting the stage for the entrance to downtown. The columns and arch will tell a story. We will leverage off the success of phase one into phase two with a heightened level of design integrity. It will likely include more commercial along the brick road, a hotel and additional parking. This phase will set the stage for a larger, destination focused entertainment experience along with residential on the north parcel. Quality design comes with an additional cost and expected return. Each phase needs to solidify the strategic investment in quality. We are in a unique position to deliver high quality operators. Our company has concepted, built and currently operates several restaurants and businesses in Tucson and Marana. We also have relationships with dozens of operators who we believe will compete to have a chance to be part of our downtown. Marana Urban LLC A) IS Architecture Mae*"P'own Council Regular Meeting Agenda Packet November 19, 2024 Page 351 of 395 1. d. Circulation See site concept graphics. 1. e. Infrastructure Will be determined as design unfolds. 1. f. Local Impacts The Town's investment in high quality, public buildings has set the stage for the first phase of downtown. Demand already exists in the buildings surrounding this parcel. The time has come to provide more dining options for the immediate neighborhood. Tangerine Farms Loop connection opens up Gladden Farms and the surrounding communities. Established annual celebrations provide another anchor for full service restaurants. 1. g. Schedule Entitlement, design, and construction drawings will start after terms for a lease are accepted. This design phase will take approximately 15 months followed by construction lasting approximately 18 months. Coordination of simultaneous public and private improvements will allow for efficiencies. Ideally, design and approval of a monument sign at Marana Road and 1-10 will happen in the first phase. 1. h. Economic Impact to Town Gross taxable revenue from the first phase of construction should exceed $12M in the first year and increase more than the inflation rate annually. Most importantly, the first phase of downtown Marana will establish an elevated design aesthetic that future phases can build from. Marana Urban LLC A Y I S Architecture Mai*a4f"I'own Council Regular Meeting Agenda Packet November 19, 2024 Page 352 of 395 16 2 Qualifications & Experience Marana Urban LLC A> 1 S Architecture Ma46"'own Council Regular Meeting Agenda Packet November 19, 2024 Page 353 of 395 17 2. a. Identification of the Lead Entity i. Legal Name And Address Of Organization Marana Urban LLC 30 South 5th Avenue Tucson, AZ 85701 ii. Legal Form Of Organization Limited Liability Company, EIN 99-3865313 Articles of Organization available under separate cover. iii. Parent Company N/A iv. Physical Address of Office Working on This Project Marana Urban LLC 30 South 5th Avenue Tucson, AZ 85701 v. Project Manager and Proposal Contact Scott Stiteler Manager # 415-259-8844 Marana Urban LLC 30 South 5th Avenue Tucson, AZ 85701 Marana Urban LLC A> 1 S Architecture Ma46-Frown Council Regular Meeting Agenda Packet November 19, 2024 Page 354 of 395 18 2. b. Experience Our team played an integral role in the redevelopment of downtown Tucson. We purchased and renovated the former MLK building at 5th and Congress. We added street level retail. We quietly provided financial support and guidance for the first phase of the Mercado District. The homes we built at Mercado established the design quality that exists today with the core part of the development. We purchased and renovated the historic Rialto building in downtown Tucson. We purchased and renovated the 200 block of Congress adding several restaurants and an AC by Marriott hotel. We purchased and renovated the historic Corbett building on 6th Avenue in the warehouse district in downtown Tucson. The Corbett project includes indoor and outdoor pickleball, a beer garden, and outdoor live music venue and restaurant/bar. We own and operate all of the projects. Our team has a long history in Marana including development of Sky Ranch, a complicated workout of Saguaro Ranch on behalf of the lender, and the development of Marana Mortuary and Cemetery. Pictured above: AC Hotel Tucson Marana Urban LLC A i I S Architecture Ma46-Frown Council Regular Meeting Agenda Packet November 19, 2024 Page 355 of 395 19 Marana Urban has engaged AXIS Architecture + Design to provide design services for this proposed project. Other design and professionals will be engaged as required. With studios in San Francisco, Seattle, and Los Angeles, as well as satellite offices in Hawaii, and Boston, AXIS is able to deliver accessible and responsive expertise across the continent. Proudly having helped our client partners launch successful projects across the United States. AXIS's award -winning hotel and hospitality architectural design practice sets us apart. With over twenty years of experience helping hospitality investors and hotel brands maximize their investment potential, we've proudly earned our reputation as one of the United States' most practiced and experienced hospitality architectural design firms. Pictured above: AXIS was the executive architect of La Peer boutique hotel by Kimpton Hotels in Los Angeles Marana Urban LLC A Y I S Architecture Ma46"'own Council Regular Meeting Agenda Packet November 19, 2024 Page 356 of 395 20 With over 20 years of proven experience, and a list of international award -winning projects as part of our design portfolio, AXIS Architecture + Design has a demonstrated record of leading word -class developments and architectural design projects to success. As a project stakeholder, AXIS has a proven reputation acting as project manager, coordinating project partners and sub -contractors, and advising stakeholders on best practices to ensure project success. Pictured above: AXIS has designed a new21-story multi -family residential and boutique hotel high rise in the heart of trendy Koreatown, Los Angeles. Marana Urban LLC A Y I S Architecture MaedigigrOWn Council Regular Meeting Agenda Packet November 19, 2024 Page 357 of 395 If awarded the opportunity, our intent is to begin negotiations on the lease without delay. We have successfully purchased, designed, developed, and operate dozens of businesses and real estate projects over several decades in Southern Arizona. Our team has focused on this opportunity as our priority for the coming years. We have not accepted new business offers in anticipation of the opportunity to be a part of building downtown Marana. Pictured above: The Corbett Site, one of this group's premier development projects in Tucson. Marana Urban LLC A Y I S Architecture Mai*M'Irown Council Regular Meeting Agenda Packet November 19, 2024 Page 358 of 395 22 iv. Resumes of Key Personnel Scott Stiteler Scott Stiteler is the principal owner of Marana Urban LLC, Tucson Urban LLC, and several related entities. He received a BS in Economics from Santa Clara University in 1989 and a MBA from Santa Clara University in 1992. In 1990 Mr. Stiteler formed Stellar Homes, Inc. to build urban, infill, residential projects in the San Francisco Bay Area. In 1994 Mr. Stiteler expanded development activities to Tucson, Arizona. He has developed approximately twenty-five projects in the Tucson area and continues with those endeavors. While in Tucson, Mr. Stiteler diversified his development focus, expanding into income producing properties and redevelopment of vintage buildings in downtown Tucson. In 2012, Mr. Stiteler partnered with Rudy Dabdoub and his family on a variety of endeavors. In 2023, Mr. Stiteler partnered with Regan Jasper to provide hospitality experience. In the past sixteen years, projects in downtown Tucson include redevelopment and renovation of three city blocks at the intersection of 5th Avenue and Congress Street and recently the renovation of the Corbett block at 6th Avenue and 7th Street. Notable downtown projects include One North Fifth apartments, the Hub Restaurant, Connect Coworking at Rialto, Hub Ice Cream Factory, Playground, Good Oak Bar, Love Burger, Corbett's and AC Tucson Hotel by Marriott. Future projects include Moxy Hotel by Marriott, a joint venture on the Ronstadt Transit Center, and main street in downtown Marana. In addition to real estate development, he is an early -stage investor in several consumer product companies. Mr. Stiteler currently resides in Belvedere, California with his wife, Jane, two daughters and two sons. He is a founder and board member at Del Bac in Tucson along with the Wiener Friendship Cup in Tiburon, California. In his free time, Mr. Stiteler enjoys open water swimming, triathlon, travel with family, and taking pictures of urban settings. Marana Urban LLC A Y I S Architecture Mai*a4f"I'own Council Regular Meeting Agenda Packet November 19, 2024 Page 359 of 395 23 Rudy Dabdoub Rudy Dabdoub has had a long-standing career in real estate development and hospitality management, primarily based in Southern Arizona and Sonora, Mexico. After earning his BS in Business Administration from Northern Arizona University in 1990, Rudy joined his family's business, DAB Developers, contributing to significant industrial, commercial, and residential projects in Nogales, Sonora. In 1994, he expanded the family's business interests into the United States, where he founded D&D Properties and ventured into the gasoline station & convenience store sector. In 1998, Rudy redirected the U.S. side of the family business towards developing office and industrial buildings, before shifting focus to residential projects in 2017. Simultaneously, since 2001, he has managed the development and operation of several hotel projects across Arizona under North Face Investments L.L.0 and associated companies. Through NFI and in partnership with Scott Stiteler, he has also managed a diverse portfolio including restaurants, bars, retail spaces, and a large mixed -use project all in the Downtown Tucson area. Under his direction, NFI has acquired multiple sites in Arizona for future development. Further, Rudy founded Cima Enterprises L.L.C. in 2003, a full -service management firm overseeing many of the aforementioned businesses and employing over 250 staff members. He has also explored other real estate endeavors through the years, ranging from student housing and co -working office space to mixed -use commercial projects. Beyond his professional pursuits, Rudy is an active community member, serving on multiple boards and receiving accolades for his contributions. Rudy is a proud Tucsonan, husband, and father of five. He spends his free time with his family, attending University of Arizona sporting events, traveling, exercising, and sailing. Marana Urban LLC A Y I S Architecture Ma46"'own Council Regular Meeting Agenda Packet November 19, 2024 Page 360 of 395 24 Regan Jasper Regan Jasper, current partner at Corbett's and Seven Corners Management and founding partner of Fox Restaurant Concepts, discovered Tucson Arizona through the University of Arizona as a Sophomore, fell in love with the sunshine, and never returned to the Pacific Northwest. He has worked his way through the restaurant industry focusing on his passion for wine and hospitality. As a partner in Fox Restaurants Concepts from 1999 until its sale in October 2019, he helped grow the company from Wildflower to 135 restaurants with over 15 unique concepts. In 2020, Jasper stepped away from FRC and Cheesecake Factory and was woo'd by the possibilities of a new project that would later be called Corbett's. This led to the formation of Seven Corners Management to oversee multiple restaurant operations in downtown and downtown - adjacent Tucson. Jasper has most recently partnered with Scott Stiteler and Rudy Dabdoub to plan and develop a 40 acre parcel in downtown Marana. Marana Urban LLC A i I S Architecture Ma46"'own Council Regular Meeting Agenda Packet November 19, 2024 Page 361 of 395 25 Cory Creath Ruairi O'Connell As President and CEO of AXIS, Cory works closely with fellow firm principals to set the strategic vision for the company. Under his leadership, AXIS has grown to be one of the pre-eminent hospitality and multi -family design firms in the western US, serving owners and developers on ground - up, renovation/reposition, value add, and adaptive re -use projects. Mr. Creath is a licensed Architect with forty years of experience in the design industry. In addition to managing projects, Cory's responsibilities consist of overseeing business development and administration. He expertly guides projects from the feasibility stage through the design and entitlement phases, and brings focused attention to the integration of design concepts with the budget, schedule and approval realm. Prior to the formation of AXIS in September 2001, Mr. Creath was a studio director and senior project manager with Gensler's San Francisco office. Mr. Creath has managed large-scale architecture, building renovation and interior projects. He has proven his ability to coordinate consultants, interface with general contractors and approval agencies. His focus is bringing the whole design team together to deliver quality design that is within the Client's budget. Major clients have included: Prism Hotels, Kensington Management, Lotus Management, HOST, Carlyle Group, Blackstone/LXR, Montclair Hotel Investors, Reneson Hotels, Blackridge, K2 Development, Sunstone, Chelsea, Z&L Properties, Paradigm Hotels, Westbrook Realty, Hong Kong Shanghai Hotel Group, United Pacific Hotel Group, and Tucson North. Ruairi joined AXIS at the beginning of 2019, bringing experience of diverse project types across market sectors and five continents, gleamed from over a decade working at and with design firms large and small in the San Francisco Bay Area. As the firm's Design Director, Ruairi works closely with stakeholders and the design team to develop and ensure functional, programmatic, and aesthetic criteria are defined and met or exceeded. Major clients have included federal, state, and municipal government agencies, institutional clients, and private developers including Reneson Hotels and Newcrest. Ruairi has led design for the successful entitlement of approximately $345 million in new hospitality and mixed use projects, has delivered $47 million in new construction as lead designer, and almost half a billion as part of larger collaborative efforts. Marana Urban LLC A Y I S Architecture Ma46"'own Council Regular Meeting Agenda Packet November 19, 2024 Page 362 of 395 26 3 Project Delivery Approach Marana Urban LLC AyI S Architecture MadiVgI'own Council Regular Meeting Agenda Packet November 19, 2024 Page 363 of 395 27 3. a. Proposed Method to Accomplish the Work Building a downtown from the ground up is obviously a large endeavor. With expectations of delivering a genuine downtown so high on the public and private side of this relationship, the objective rises toward unprecedented. Our passion to design and construct structures that have charm, strength and deliver experience is the reason we have been successful with our part of rebuilding downtown Tucson. It is the reason we will deliver for downtown Marana. Thankfully, we enjoy a trusting relationship with the Town of Marana and its leaders based on our work in the past. This is a partnership that requires all participants to enter the relationship wanting to give more than is received. Every business and tenant that becomes a part of downtown Marana will be part of setting a high standard. Our company has adhered to this principle since its founding. The projects we have completed in downtown Tucson reflect this important requirement. There will be nothing that qualifies as mediocre in our downtown. One of the main attractions to this opportunity is based on traditions the Town of Marana has successfully established. Founder's Day, Marana Holiday Festival and Christmas Tree Lighting, and Marana Pumpkin Patch are only a few examples of community pride and respect for history. We will fully engage with the Town to leverage and grow these and other special events. Marana Urban LLC A Y I S Architecture Mai*a4f"I'own Council Regular Meeting Agenda Packet November 19, 2024 Page 364 of 395 28 3. b. Knowledge and Understanding of the Local Environment Our company has been involved starting and finishing dozens of real estate developments in southern Arizona. We have immersed ourselves in the community with how we approach design, materials and experience. We have consistently been part of supporting entities from non profit to cultural and look forward to continuing this duty in the future. Main street and Marana arch will deliver an experience that makes residents and visitors want to come back. The streets and surrounding buildings will be clean, charming, interesting and vibrant. They will have personality during the day and night. They will feel comfortable and safe. They will attract business owners that want to maintain this feel knowing that it is not easy to find and requires personal pride to maintain it. Marana Urban LLC A i I S Architecture Ma46-Frown Council Regular Meeting Agenda Packet November 19, 2024 Page 365 of 395 29 4 Business and Financial Plan Marana Urban LLC A> 1 S Architecture Ma46"'own Council Regular Meeting Agenda Packet November 19, 2024 Page 366 of 395 30 cio? .0! • - AIM II.- — U7111/ 11111 AMM=IWPA. I WII=VIISIVIMWM, Nor 2 :.70,1,1111MC 1/114=11.11M0111 iminN ••••:: mdogiawr7 Am -rag mwm Ialr=IN Mk:IFIIMMENI/ ms. ' - 11J I 1 11 11 1.ra, Pictured Above: Past success in activating an urban environment; the Corbett Site in Tucson. Axic Architect:ire Marana Urban LLC madOgrown Council Regular Meeting Agenda Packet November 19, 2024 Page 367 of 395 4. a. Preliminary Project Business Plan It is too early in the process to provide a fully developed business plan. The spreadsheet included here outlines the scale and timing of what we believe is appropriate for the combined parcels. We have designed, entitled, built and currently own several, substantial real estate assets in southern Arizona. We have been active in the region for over thirty years. We have finished every project we started. Our combined assets are suitable to deliver on a project of this scale. Bank references are provided in this proposal. Please see 4.a.i. above. iv. The project will be built in phases. Each phase will be a building block for the next. The complexity and scope of this project makes it difficult to predict timing. A key driver of timing will be increased local employers with rising salaries. As soon as the lease and development agreement are in place, our focus will be on the design, construction and opening of the entry of Marana Arch with restaurants, parking, courtyard seating, and quality art. The success of this first phase is critical to the elevated experience we want throughout downtown and the surrounding area. Marana Urban LLC A Y I S Architecture Mai*iffIrown Council Regular Meeting Agenda Packet November 19, 2024 Page 368 of 395 32 PHASE / MILESTONE SIZE, UNITS, KEYS, SPACES SOUTH 19 NORTH 40 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 PHASE ZERO SELECT APPLICANT (MARANA URBAN "MU") LEASE AND DEVELOPMENTAGREEEMENT PHASE ONE TOWN PARKING TOWN PARTIAL ROAD AND ARCH TOWN SIGN @ I-10 MU COMMERCIAL PHASE TWO TOWN PARKING EXTEND ROAD AND SECOND ARCH MU COMMERCIAL 25K MU HOTEL PHASE THREE TOWN PARKING MAIN STREET MU COMMERCIAL MU RESIDENTIAL MU HOTEL PHASE FOUR TOWN PARKING MU COMMERCIAL MU RESIDENTIAL PHASE FIVE TOWN PARKING MU COMMERCIAL MU RESIDENTIAL MU HOTEL X X 200 SPACES X X X X 400 LINEAL FEET X X X X 30 FEET X X X X 15,000 SQUARE FEET X X X X 500 SPACES X X X X 700 LINEAL FEET X X X X 25,000 SQUARE FEET X X X X 175 KEYS X X X X 700 SPACES X X 2,000 FEET X X 25,000 SQUARE FEET X X X X 450 UNITS X X X X 150 KEYS X X X X 900 SPACES 15,000 SQUARE FEET 650 UNITS 800 SPACES 15,000 SQUARE FEET 700 UNITS 150 KEYS X X X X x x X x x x X x x TOTALS 9 10 2 4 4 4 3 4 6 5 5 5 3 3 2 PROJECT SUMMARY UNITS PARKING COMMERCIAL RESIDENTIAL HOTEL 3,100 SPACES 95,000 SQUARE FEET 1,800 UNITS 475 KEYS PROJECT SUMMARY UNITS # UNITS PER UNIT TOTAL COST ESTIMATED COST IN 2024 $ ROADS AND UTILITIES $ 23,000,000 MONUMENT SIGN $ 1,375,000 ART, ROW IMPROVEMENTS, OPEN SPACE $ 7,000,000 PARKING 3,100SPACES 3100 $ 12,000 $ 37,200,000 COMMERCIAL 95,000 SQUARE FEET 95000 $ 445 $ 42,275,000 RESIDENTIAL 1,800 UNITS 1800 $ 330,000 $ 594,000,000 HOTEL 475 KEYS 475 $ 350,000 $ 166,250,000 TOTAL $ 871,100,000 Marana Urban LLC AXIS Architecture + Design Marana Town Council Regular Meeting Agenda Packet Page 369 of 395 November 19, 2024 4. b. Financial Capacity i. Financial Capacity See response in 4a ii ii. Credit and Business References Dave Lyons National Bank of Arizona Sandra Barton Alliance Bank 520-584-4140 520-784-6037 David.Lyons@nbarizona.com sbarton@ alliancebankofarizona.com 4. c. Business Revenue Risk Fletcher McCusker Rio Nuevo Board fjmccusker@gmail.com Long term success will be based on humility, focus, tenacity, realistic expectations and decades of experience from our team building in the region. Managing cashflows and resources will obviously play a vital role. Our success will be bolstered by a strong and trusting relationship between the Town, the Community and our group. Marana Urban LLC A) I S Architecture Ma46-Frown Council Regular Meeting Agenda Packet November 19, 2024 Page 370 of 395 34 5 Lease and Rent Proposal Marana Urban LLC A> 1 S Architecture Ma46"'own Council Regular Meeting Agenda Packet November 19, 2024 Page 371 of 395 35 Design Inspiration from research expeditions. Marana Urban LLC A Y I Architecture S Mai* frown Council Regular Meeting Agenda Packet November 19, 2024 Page 372 of 395 36 5. a. Lease Proposal i. Proposed Lease Term 50 years with mutually agreeable extensions ii. Public Improvements the Developer Proposes the Town Complete Utilities with adequate capacity to perimeter of each parcel. Right of way improvements including Main Street. Surface and structured parking to support demand. Open space improvements to support neighborhood. Marana arch at entry to curved walking street. Billboard that anchors and announces downtown Marana visible from 110. iii. Other Terms or Conditions Sales tax rebates until minimum acceptable return on investment occurs. Fee offset from design spend. Marana Urban LLC A Y I S Architecture MadiVgrown Council Regular Meeting Agenda Packet November 19, 2024 Page 373 of 395 37 5. b. Rent Proposal i. Rent Proposal & ii. Rent Structure Rent timing and rate tied to minimum acceptable return on investment. Ideally, the minimum return is reached in the first half of the term and the Town receives a higher return than the developer going forward. All returns shall be independently audited on an annual basis to satisfy any concerns regarding gift clause requirements or unfair sharing of public and private investment. Marana Urban LLC A Y I S Architecture Mai*iffIrown Council Regular Meeting Agenda Packet November 19, 2024 Page 374 of 395 38 5. c. Gift Clause Considerations We do not believe the gift clause is implicated by this proposal. As a preliminary matter, the Town's performance under our proposal consists of expenditures improving and benefiting the Town's own land, or incentives to reimburse the developer for improvements on Town land. As noted by the Arizona appellate court in Stuart v City of Scottsdale, CACV 18-154 (Arizona App December 8, 2020), the gift clause isn't generally violated by improvements by a governmental body to its own property. Additionally, (i) the lease will generate actual rental receipts to the Town (we propose a percentage rent arrangement whereby the Town's share of net profit from the development increases as the developer's costs have been returned with a reasonable rate of return), and (ii) at the end of the lease term, all improvements revert to the Town. As a result, while general "economic impact" is anticipated to be large, there are direct and tangible financial benefits to the Town through the payment of the rent and the reversionary interest in the improvements, contrary to the situation in Shires. Although we are not privy to any competing responses to the RFP, we argue that our proposal will be more compelling because of the ability to develop our 40 acres alongside the Town's 19 acres, providing a larger, more integrated and more compelling downtown; we assume, in connection with the Neptune Swimming Foundation case, the Town will consider that "the Gift Clause does not prevent a public entity from considering nonpecuniary factors in deciding what arrangement terms are most advantageous, even if more financially profitable deals exist." (Neptune,1136). Marana Urban LLC A Y I S Architecture Ma46"'own Council Regular Meeting Agenda Packet November 19, 2024 Page 375 of 395 39 RFP Signature Page The proposer must sign this Signature Page. In the absence of any exceptions identified in the proposal, the proposer will be bound by all of the terms and conditions outlined in the RFP. TO THE TOWN OF MARANA: The undersigned represents that he or she: 1. Is duly authorized to make binding offers on behalf of the proposer. 2. Has read and understands all information, terms, and conditions in the RFP. 3. Has not engaged in any collusive actions with any other potential proposers for this RFP. 4. Hereby certifies that the proposer takes no exception(s) to any portion of the RFP, unless an exception(s) is specifically noted in the proposal. For Clarification of this Offer contact: Proposer Name Name Address Title City State ZIP Phone Signature of Person Authorized to Sign/Date Fax Printed Name Email Title Marana Urban LLC A X i S Architecture Mar+figrown Council Regular Meeting Agenda Packet November 19, 2024 Page 376 of 395 Thank You Marana Urban LLC Ay IC Architecture Mai*iffIrown Council Regular Meeting Agenda Packet November 19, 2024 Page 377 of 395 41 • • • • • • • • • • • • 1 1 1 RFP Signature Page The proposer must sign this Signature Page. In the absence of any exceptions identified in the proposal, the proposer will be bound by all of the terms and conditions outlined in the RFP. TO THE TOWN OF MARANA: The undersigned represents that he or she: 1. Is duly authorized to make binding offers on behalf of the proposer. 2. Has read and understands all information, terms, and conditions in the RFP. 3. Has not engaged in any collusive actions with any other potential proposers for this RFP. 4. Hereby certifies that the proposer takes no exception(s) to any portion of the RFP, unless an exception(s) is specifically noted in the proposal. rvicaremci ur bC4V1 L Lc. Proposer Name 3osdttiS}"Ana. Address TAcSty AZ City„ .. S $SIOZIP Ili IZ4 Signaltire of Person Authorized to Sign/Date SC0+4— Printed Name MgV1QcQC Title For Clarification of this Offer contact: Sco'+ S+11-ele.r Name Matv1gcer Title '415 2S 9 8 8 L N Phone Fax +VICSCi..lvbe 1@9iMct►IAo Email Marana Urban LLC AXIS Arch+iMaa�a Town Council Regular Meeting Agenda Packet Design November 19, 2024 Page 378 of 395 40 OPUS® THE OPUS GROUP September 10, 2024 Vicky Edwards Procurement Officer I Finance Town of Marana 11555 W Civic Center Dr Marana, AZ 85653 RE: 2024-015 Lease and Development of Downtown Marana 19 Acres Dear Vicky Edwards, We appreciate your follow-up questions and are pleased to provide the following responses to address the information you requested. We hope these responses further clarify our proposal, and we remain fully committed to the success of this project. If there are any additional questions or if further clarification is needed, please do not hesitate to contact us. We look forward to working with the Town of Marana on this exciting project. Sincerely, Scott Stiteler Partner I Marana Urban LLC 30 S 5th Ave Tucson, AZ 85701 Phone: 415.259.8844 Email: tucsonurban@gmail.com Jay A. Ramos Senior Director, Real Estate Development I Opus Development Company, L.L.C. 2555 E Camelback Road, Phoenix, AZ 85016 Phone: 602.648.5065 Email: Jay.Ramos@opus-group.com Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 379 of 395 OPUS® THE OPUS GROUP Q1) Business & Financial Plan — Based on the spreadsheet provided for Section 4.a. Preliminary Project Business Plan on page 33 of your proposal, provide a detailed breakdown of estimated revenue and expenses for each phase of the project to include the following: • Expected timeline defined by each phase • Detailed preliminary revenue and expense projections RESPONSE This project presents a unique and valuable opportunity for the Town of Marana to invest in long-term economic growth and community development. By partnering on the infrastructure buildout and offering incentives such as the initial ground lease rent-free period, sales tax rebates, Marana will unlock substantial future tax revenues from a vibrant retail center spanning 95,000 square feet, a hotel with 175 keys and 700 parking spaces. While the financial benefits may not be immediate, the long-term payoff after the 10-year buildout will provide a significant boost to the town's tax base, enhance job creation, and stimulate local economic activity. Additionally, once Marana Urban LLC and Opus meet their investment hurdles, the town will share in all project revenues ensuring a steady stream of income. This public -private partnership will set the stage for Marana's sustained growth, making it an attractive destination for both residents and visitors. See next spreadsheet named "Operating Cash Flows". Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 380 of 395 YEAR 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 Hotel Cost $/Room $350,000 $61,250,000 Retail Cost $/SF $310 Cumulative SF Built 6,000 15,000 15,000 106,500 114,500 119,500 125,000 135,000 150,000 165,000 180,000 SF Built Per Period 6,000 9,000 0 6,500 8,000 5,000 5,500 10,000 15,000 15,000 15,000 Cost Per Period $1,860,000 $2,790,000 $0 $2,015,000 $2,480,000 $1,550,000 $1,705,000 $3,100,000 $4,650,000 $4,650,000 $4,650,000 Cumulative Costs $4,650,000 $4,650,000 $67,915,000 $70,395,000 $71,945,000 $73,650,000 $76,750,000 $81,400,000 $86,050,000 $90,700,000 OPERATING CASH FLOWS Space Rental Rate $/SF/YR SF 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 Brewery $35.00 6,000 $180,000 $185,400 $190,962 $196,691 $202,592 $208,669 $214,929 $221,377 $228,019 $234,859 $241,905 F&B 1 $35.00 5,000 $175,000 $180,250 $185,658 $191,227 $196,964 $202,873 $208,959 $215,228 $221,685 $228,335 F&B 2 $35.00 4,000 $140,000 $144,200 $148,526 $152,982 $157,571 $162,298 $167,167 $172,182 $177,348 $182,668 F&B 3 $35.00 3,500 $122,500 $126,175 $129,960 $133,859 $137,875 $142,011 $146,271 $150,660 Dance Barn $30.00 3,000 $90,000 $92,700 $95,481 $98,345 $101,296 $104,335 $107,465 $110,689 Rodeo $30.00 8,000 $240,000 $247,200 $254,616 $262,254 $270,122 $278,226 $286,573 Steakhouse $35.00 5,000 $175,000 $180,250 $185,658 $191,227 $196,964 $202,873 F&B 4 $36.00 5,500 $192,500 $198,275 $204,223 $210,350 $216,660 General Retail $36.00 5,000 $180,000 $185,400 $190,962 $196,691 General Retail $36.00 5,000 $180,000 $185,400 $190,962 $196,691 General Retail $36.00 5,000 $180,000 $185,400 $190,962 General Retail $36.00 5,000 $180,000 $185,400 $190,962 General Retail $36.00 5,000 $180,000 $185,400 $190,962 General Retail $36.00 5,000 $180,000 $185,400 General Retail $36.00 5,000 $180,000 $185,400 General Retail $36.00 5,000 $180,000 $185,400 General Retail $36.00 5,000 $180,000 General Retail $36.00 5,000 $180,000 General Retail $36.00 5,000 $180,000 Total SF 95,000 Rental Income Expense Recovery Income POTENTIAL GROSS INCOME Vacancy @ 5% EFFECTIVE GROSS INCOME Common Area Maintenance Management Fee Insurance Ground Rent Property Taxes TOTAL OPERATING EXPENSES RETAIL NET OPERATING INCOME HOTEL NET OPERATING INCOME Total Net Operating Income Parking ales Tax Bene Parking Revenue Less Leasing Costs NET Revenue $180,000 $500,400 $515,412 $743,374 $1,005,676 $1,210,846 $1,439,671 $1,842,861 $2,438,147 $3,051,292 $3,682,830 $74,106 $185,265 $185,265 $265,547 $364,355 $467,354 $541,860 $677,325 $799,244 $880,523 $1,083,720 $254,106 $685,665 $700,677 $1,008,921 $1,370,031 $1,678,200 $1,981,531 $2,520,186 $3,237,391 $3,931,814 $4,766,550 $9,000 $25,020 $25,771 $37,169 $50,284 $60,542 $71,984 $92,143 $121,907 $152,565 $184,142 Per SF $245,106 $660,645 $674,907 $971,753 $1,319,747 $1,617,658 $1,909,548 $2,428,043 $3,115,483 $3,779,250 $4,582,409 $5.00 $30,000 $75,000 $75,000 $532,500 $572,500 $597,500 $625,000 $675,000 $750,000 $825,000 $900,000 3% $7,353 $19,819 $20,247 $29,153 $39,592 $48,530 $57,286 $72,841 $93,465 $113,377 $137,472 $2.00 $12,000 $30,000 $30,000 $43,000 $59,000 $69,000 $80,000 $100,000 $130,000 $160,000 $190,000 $216,000 $90 Yield on Costs $49,353 $124,819 $125,247 $604,653 $671,092 $715,030 $762,286 $847,841 $973,465 $1,098,377 $1,443,472 $195,753 $535,826 $549,660 $367,100 $648,655 $902,628 $1,147,261 $1,580,202 $2,142,019 $2,680,872 $3,138,937 50.00 50.00 50.00 $0 $3,481,433 $4,724,344 $4,856,110 $5,006,699 $5,161,817 $5,333,450 $5,481,796 $195,753 $535,826 $549,660 $367,100 $4,130,088 $5,626,972 $6,003,371 $6,586,901 $7,303,836 $8,014,322 $8,620,733 $52,500 T131,250 $131,250 $188,125 5258,12 301,875 350,000 $437,50 8,75 $700,000 $831,250 $80,000 $80,000 $80,000 $80,000 $80,000 $80,000 $80,000 $80,000 $80,000 $80,000 $80,000 $540,000 $810,000 $0 $585,000 $720,000 $450,000 $495,000 $900,000 $1,350,000 $1,350,000 $1,350,000 ($211,747) ($62,924) $760,910 $50,225 $3,748,213 $5,558,847 $5,938,371 $6,204,401 $6,602,586 $7,444,322 $8,181,983 -11.4% -1.4% 16.4% 0.1% 5.3% 7.7% 8.1% 8.1% 8.1% 8.7% 9.0% Annual Sales Per Year $/SF Average Town of Marana Sales Tax Rate $350 $2,100,000 $5,250,000 $5,250,000 $7,525,000 $10,325,000 $12,075,000 $14,000,000 $17,500,000 $22,750,000 $28,000,000 $33,250,000 2.50% $52,500 $131,250 $131,250 $188,125 $258,125 $301,875 $350,000 $437,500 $568,750 $700,000 $831,250 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 381 of 395 Marana Hotel - Tucson, AZ - Version v1.57 Operating Cash Flow J Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Year 8 Year 9 Year 10 ar ear Ending Year Ending Year Ending Year Ending Year Ending Year Ending Year Ending Year Ending Year Ending Year Ending Year Ending December December December December December December December December December December December 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 Rooms 175 Days 365 Available Rooms 63,875 Occupied Rooms 34,108 Occupancy 53.4% ADR $175.00 ADR Growth N/A RevPAR $93.45 RevPAR Growth N/A TRevPAR $82.60 TRevPAR Growth N/A Departmental Revenues Rooms Food & Beverage Other Operated Departments Parking Income Total Revenue 5,968,813 68,215 17,054 51,161 6,105,243 97.8% 1.1% 0.3% 0.8% 100.0% Departmental Expenses Rooms 800,000 13.4% Food & Beverage 20,465 30.0% Other Operated Departments 8,527 50.0% Total Departmental Expenses 828,991 13.6% 175 366 64,050 43,554 68.0% $180.25 3.00% $122.57 31.17% $109.67 32.76% 7,850,609 89,721 22,430 67,291 8,030,051 970,059 25,223 10,607 1,005,889 97.8% 1.1% 0.3% 0.8% 100.0% 12.4% 28.1% 47.3% 12.5% 175 365 63,875 43,435 68.0% $185.66 3.00% $126.25 3.00% $112.94 2.99% 8,064,034 92,160 23,040 69,120 8,248,354 997,414 25,930 10,903 1,034,246 97.8% 1.1% 0.3% 0.8% 100.0% 12.4% 28.1% 47.3% 12.5% 175 365 63,875 43,435 68.0% $191.23 3.00% $130.03 3.00% $116.33 3.00% 8,305,955 94,925 23,731 71,194 8,495,805 1,027,336 26,708 11,230 1,065,273 97.8% 1.1% 0.3% 0.8% 100.0% 12.4% 28.1% 47.3% 12.5% 175 365 63,875 43,435 68.0% $196.96 3.00% $133.94 3.00% $119.82 3.00% 8,555,133 97,773 24,443 73,330 8,750,679 1,058,156 27,509 11,567 1,097,232 97.8% 1.1% 0.3% 0.8% 100.0% 12.4% 28.1% 47.3% 12.5% 175 366 64,050 43,554 68.0% $202.87 3.00% $137.95 3.00% $123.43 3.01% 8,835,929 100,982 25,246 75,737 9,037,893 1,091,812 28,389 11,938 1,132,139 97.8% 1.1% 0.3% 0.8% 100.0% 12.4% 28.1% 47.3% 12.5% 175 365 63,875 43,435 68.0% $208.96 3.00% $142.09 3.00% $127.12 2.99% 9,076,141 103,727 25,932 77,795 9,283,595 1,122,600 29,184 12,271 1,164,055 97.8% 1.1% 0.3% 0.8% 100.0% 12.4% 28.1% 47.3% 12.5% 175 365 63,875 43,435 68.0% $215.23 3.00% $146.35 3.00% $130.93 3.00% 9,348,425 106,839 26,710 80,129 9,562,103 1,156, 278 30,060 12,639 1,198,977 97.8% 1.1% 0.3% 0.8% 100.0% 12.4% 28.1% 47.3% 12.5% 175 365 63,875 43,435 68.0% $221.68 3.00% $150.75 3.00% $134.86 3.00% 9,628,878 110,044 27,511 82,533 9,848,966 1,190,966 30,961 13,019 1,234,946 97.8% 1.1% 0.3% 0.8% 100.0% 12.4% 28.1% 47.3% 12.5% 175 366 64,050 43,554 68.0% $228.34 3.00% $155.27 3.00% $138.92 3.01% 9,944,916 97.8% 113,656 1.1% 28,414 0.3% 85,242 0.8% 10,172,228 100.0% 1,228,846 31,952 13,437 1,274,235 12.4% 28.1% 47.3% 12.5% 175 365 63,875 43,435 68.0% $235.19 3.00% $159.93 3.00% $143.07 2.99% 10,215,276 97.8% 116,746 1.1% 29,187 0.3% 87,560 0.8% 10,448,768 100.0% 1,263,498 32,847 13,811 1,310,157 12.4% 28.1% 47.3% 12.5% DEPARTMENTAL PROFIT 5,276,251 86.4% 7,024,162 87.5% 7,214,108 87.5% 7,430,531 87.5% 7,653,447 87.5% 7,905,754 87.5% 8,119,540 87.5% 8,363,127 87.5% 8,614,020 87.5% 8,897,993 87.5% 9,138,612 87.5% Undistributed Expenses Admin. & General 341,075 5.6% Information and Telecommunications Systems 51,161 0.8% Sales, Marketing & Franchise Fee 511,613 8.4% Prop. Op. & Maintenance 272,860 4.5% Utilities 238,753 3.9% Total Undistributed Expenses 1,415,461 23.2% 448,606 5.6% 67,291 0.8% 672,909 8.4% 358,885 4.5% 314,024 3.9% 1,861,716 23.2% 460,802 5.6% 69,120 0.8% 691,203 8.4% 368,642 4.5% 322,561 3.9% 1,912,328 23.2% 474,626 71,194 711,939 379,701 332,238 1,969,698 5.6% 0.8% 8.4% 4.5% 3.9% 23.2% 488,865 73,330 733,297 391,092 342,205 2,028,789 5.6% 0.8% 8.4% 4.5% 3.9% 23.2% 504,910 5.6% 75,737 0.8% 757,365 8.4% 403,928 4.5% 353,437 3.9% 2,095,377 23.2% 518,637 5.6% 77,795 0.8% 777,955 8.4% 414,909 4.5% 363,046 3.9% 2,152,342 23.2% 534,196 5.6% 80,129 0.8% 801,294 8.4% 427,357 4.5% 373,937 3.9% 2,216,912 23.2% 550,222 5.6% 82,533 0.8% 825,332 8.4% 440,177 4.5% 385,155 3.9% 2,283,420 23.2% 568,281 5.6% 85,242 0.8% 852,421 8.4% 454,625 4.5% 397,797 3.9% 2,358,366 23.2% 583,730 5.6% 87,560 0.8% 875,595 8.4% 466,984 4.5% 408,611 3.9% 2,422,480 23.2% GROSS OPERATING PROFIT 3,860,790 63.2% 5,162,446 64.3% 5,301,780 64.3% 5,460,834 64.3% 5,624,659 64.3% 5,810,376 64.3% 5,967,198 64.3% 6,146,214 64.3% 6,330,601 64.3% 6,539,628 64.3% 6,716,132 64.3% Management Fee 183,157 3.0% 240,902 3.0% 247,451 3.0% 254,874 3.0% 262,520 3.0% 271,137 3.0% 278,508 3.0% 286,863 3.0% 295,469 3.0% 305,167 3.0% 313,463 3.0% INCOME BEFORE FIXED EXPENSES 3,677,633 60.2% 4,921,544 61.3% 5,054,330 61.3% 5,205,959 61.3% 5,362,138 61.3% 5,539,240 61.3% 5,688,690 61.3% 5,859,351 61.3% 6,035,132 61.3% 6,234,461 61.3% 6,402,669 61.3% Fixed Expenses Property Taxes 146,200 2.4% Insurance 50,000 0.8% Lease & Rental Expense 0.0% Total Fixed Expenses 196,200 3.2% 146,200 51,000 197,200 1.8% 0.6% 0.0% 2.5% 146,200 52,020 198,220 1.8% 0.6% 0.0% 2.4% 146,200 53,060 199,260 1.7% 0.6% 0.0% 2.3% 146,200 54,122 200,322 1.7% 0.6% 0.0% 2.3% 150,586 55,204 205,790 1.7% 0.6% 0.0% 2.3% 150,586 56,308 206,894 1.6% 0.6% 0.0% 2.2% 150,586 57,434 208,020 1.6% 0.6% 0.0% 2.2% 150,586 58,583 209,169 1.5% 0.6% 0.0% 2.1% 150,586 59,755 210,341 1.5% 0.6% 0.0% 2.1% 150,586 60,950 211,536 1.4% 0.6% 0.0% 2.0% EBITDA 3,481,433 57.0% 4,724,344 58.8% 4,856,110 58.9% 5,006,699 58.9% 5,161,817 59.0% 5,333,450 59.0% 5,481,796 59.0% 5,651,331 59.1% 5,825,963 59.2% 6,024,120 59.2% 6,191,133 59.3% Reserve for Replacement 122,105 2.0% 160,601 2.0% 164,967 2.0% 169,916 2.0% 175,014 2.0% 180,758 2.0% 185,672 2.0% 191,242 2.0% 196,979 2.0% 203,445 2.0% 208,975 2.0% NET OPERATING INCOME 3,359,328 55.0% 4,563,743 56.8% 4,691,143 56.9% 4,836,783 56.9% 4,986,803 57.0% 5,152,692 57.0% 5,296,124 57.0% 5,460,089 57.1% 5,628,983 57.2% 5,820,676 57.2% 5,982,158 57.3% Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 382 of 395 OPUS® THE OPUS GROUP Q2) Business Plan/Financial Resources — Identify the sources of capital for the project and provide initial financial projections to include key assumptions underlying these projections. RESPONSE Business Plan/Financial Resources Sources of Capital: Marana Urban LLC's project will be funded through a well-balanced capital stack, comprising 60% debt financing and 40% equity. The primary sources of capital include: 1. Equity Partners: We have various existing relationships with Institutional investors, that will provide the equity portion of the capital stack, contributing 40% of the total project cost. These partners bring a wealth of experience and capital resources to support the project's long-term success. 2. Debt Financing: The remaining 60% of the capital stack will come from debt financing. We will leverage our strong relationships with both regional and national banks. The construction loan will transition to permanent financing upon stabilization of the project, ensuring favorable loan terms throughout the development process. 3. Additional Funding Opportunities: We are exploring additional funding opportunities, including local grants and tax incentives available through city, county and state, which could further reduce the overall capital needs. Initial Financial Projections: The financial projections for the project are based on key assumptions related to development costs, revenue generation, and the timeline for stabilization. Development Costs: • Land Acquisition: from the Town of Marana, will be a 50-year ground lease at a fair market rent of $0.26 PSF, with abated rent for the first 10 years of the project with CPI adjustments every 5 years. • Construction Costs: Total construction costs, for the phases are estimated at $871M. However, Phase 1 will incur most offsite costs including roads and utilities estimated at $23M. The retail portion on the 19-acre parcel including the hotel will have a total estimated cost of $91M. • Contingency: A 5% contingency fund will be set aside for unforeseen expenses. Revenue Projections: Hotel Component: Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 383 of 395 OPUS® THE OPUS GROUP With an Average Daily Rate (ADR) of $175 per night and a projected 68% occupancy rate, the 175-key hotel component is expected to generate annual gross room revenues of $7.8M by Year 2, following a stabilization period of 18 months. Net revenues are estimated at $4.5M. Retail Component: Retail tenants will be offered rental rates ranging from $30 to $36 per square foot, with NNN expenses at $9.00 per square foot. During the initial 18 months, rent concessions will be provided to attract high - quality tenants. Once stabilized, the retail component will contribute approximately $4.7M Gross Rent annually and $3.1M net. Operating Expenses: • Hotel Operating Expenses: Operating expenses for the hotel will account for 30-35% of total revenue, including staffing, utilities, and maintenance costs. • Retail Operating Expenses: Retail tenants will cover NNN expenses, estimated at $9.00 per square foot. Key Assumptions: Stabilization Timeline: The hotel is expected to stabilize within 18 months, and each phase of the retail component will stabilize within 18 months of its construction date. Occupancy Rates: Hotel occupancy is projected to stabilize at 68%, while retail occupancy is expected to stabilize at 95%. Rental Rates: Retail rental rates will range from $30 to $36 per square foot, with a 3% annual increase post -stabilization. It is to early to calculate, however, a percentage rent will also be collected from the majority of the tenants. Financing Terms: We expect to secure a construction loan at market interest for the 60% debt portion, with permanent financing terms transitioning after stabilization. Profitability: Yield on Costs(YOC): We aim for a minimum Yield on Cost of 8%. Internal Rate of Return (IRR): The project is expected to achieve an IRR of 18% over a 10-year period, supported by steady cash flow from the hotel and retail components. Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 384 of 395 OPUS® THE OPUS GROUP Q3) Detailed Rent Proposal/Structure — Provide a detailed rent proposal to include the following: • Given the appraiser's opinion of fair market rental value of $0.26 per square foot, specify whether you will request any flexible pricing or reduced rates during any phases of the project. • Define Marana Urban LLC's minimum acceptable return on investment and provide clarification on how this will be reached in the first half of the term. RESPONSE Detailed Rent Proposal/Structure Marana Urban LLC acknowledges the appraiser's assessment of the fair market rental value at $0.26 per square foot. To ensure the successful launch and stabilization of our project, we are requesting free rent for the first 10 years of the project. This approach is necessary to provide competitive rent concessions to our retail tenants and to support the hotel's stabilization. Phase 1 (Initial 60 Months): Free Rent Period During the first 60 months, we request a complete rent waiver. This period is critical for establishing strong relationships with our retail tenants by offering attractive rent concessions, which will help achieve high occupancy rates and foster a vibrant retail environment. Additionally, this timeframe allows the hotel to stabilize its operations without the immediate financial pressure of ground rent obligations. Phase 2 (Subsequent 60 Months): Continued Free Rent To maintain tenant retention and ensure ongoing operational stability, we propose extending the free rent period through the subsequent 60 months. This extension supports sustained occupancy levels and provides the hotel ample time to achieve full operational efficiency and profitability. Yield on Cost (YOC): Marana Urban LLC's minimum acceptable Yield on Cost is 8%. To achieve this target, we will implement the following strategies: 1. Tenant Attraction and Retention: By offering free rent during both phases, we create an attractive proposition for high -quality retail tenants, ensuring rapid lease -up and sustained occupancy. High occupancy rates will generate steady revenue streams, which are crucial for meeting our YOC objectives. 2. Operational Stabilization: The 10-year free ground rent period for the hotel allows for a focused effort on operational efficiency and service excellence without the immediate burden of rent costs. As the hotel stabilizes and begins to Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 385 of 395 OPUS® THE OPUS GROUP generate consistent revenue, we will be well -positioned to transition to standard rental terms, thereby enhancing overall profitability. 3. Cost Management: Effective management of development and operational costs during the free rent periods will enable us to maintain financial health and allocate resources efficiently. This disciplined approach ensures that we can achieve our YOC targets even with the initial rent concessions. 4. Revenue Growth: As the hotel stabilizes and the retail component reaches full occupancy, we anticipate significant revenue growth. This growth, combined with the eventual transition to market rent, will drive the overall internal rate of return (IRR), ensuring that Marana Urban LLC meets or exceeds the minimum 18% IRR by the end of the 10-year period. Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 386 of 395 OPUS® THE OPUS GROUP Q4) Business Attraction Approach — Describe your plan to attract and retain businesses and tenants for the development by providing the following: • Detail the strategies to attract businesses to the development and how you plan to maintain high occupancy rates. • Outline your approach to working with the Town to promote local programs and special events to maximize community engagement. RESPONSE We will follow the same approach we successfully used in downtown Tucson to attract and retain quality operators. Today the intersection is 100% leased with a diverse group of businesses. We focused on three blocks at one intersection. We fully renovated existing historic structures with high quality materials. Rusted steel, heritage woods, hand -built leaded glass, reused brick, and local art turned a boarded -up intersection into an anchor for downtown. Our intersection is adjacent to the historic Train Depot that went through a comprehensive renovation from the city. Every part of the aesthetic was planned to elevate the area. With help from incentives provided by the city and the TIF district, we provided significant support to operators to open businesses in an area that had been blighted for decades. Reduced rent, free parking, sales tax rebates, generous tenant improvement allowances, and zero property tax pass throughs were instrumental in our pursuit of successful businesses and high occupancy. In the middle of the redevelopment, we were awarded an AC Hotel by Marriott franchise. This was one of the first AC Hotels approved in North America. With our downtown Tucson blocks, we provided support or partnered with dozens of local groups and regular events including the historic Rialto Theater, the Tucson Jazz Festival, the Tucson Film Festival, Second Saturdays, Meet me at Maynard's, Ben's Bells, the January 8th Memorial, and many others. These partnerships are required to deliver a lasting and lively downtown. We will continue this strategy with Marana Main Street. The Irvine Company has a development model that is one we respect. They consistently build neighborhoods that look established as soon as construction is completed. Every tree, wall, light fixture, sign, and building design guideline are excellent. They invite a short list of the most respected builders and businesses to tour each of their blocks when an opportunity is released. Because of the constant commitment to quality materials, design, and management it is common for the Irvine Company to receive an offer from every invited prospect. Creating this type of experience and demand is our goal. Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 387 of 395 OPUS® THE OPUS GROUP Q5) Public Infrastructure — Provide a comprehensive overview of the necessary public infrastructure for the project. RESPONSE When developing a specialty retail center, several types of public infrastructure are typically required to support the site and ensure connectivity and accessibility. These include: 1. Roadways and Access Points: Upgrading or constructing new roads to handle increased traffic is essential. This can include widening existing streets, creating new access points, signalization, turn lanes, and potentially roundabouts to facilitate smooth vehicle movement. 2. Utilities: Power retail centers require access to sufficient utilities, such as: • Water supply: Adequate capacity for fire protection, irrigation, and domestic use. • Sewer systems: Including stormwater drainage to prevent flooding and proper waste management. • Electricity and Gas: Extensions of electrical grids or gas lines to meet the needs of large retail outlets and related amenities. 3. Parking: Large parking lots with appropriate drainage and lighting are essential for customer convenience and safety. Infrastructure for electric vehicle (EV) charging stations may also be required. 4. Public Transit Connectivity: In some cases, nearby bus stops or shuttle services, access may be developed or enhanced to encourage alternative transportation options for customers and employees. 5. Pedestrian and Bike Infrastructure: Sidewalks, bike lanes, crosswalks, and pedestrian bridges to safely connect the center with surrounding neighborhoods or other retail areas. 6. Stormwater Management: Detention ponds, green spaces, permeable paving, and other infrastructure to manage runoff and meet environmental requirements. 7. Landscaping and Green Spaces: Often required to create a more aesthetically pleasing environment and contribute to sustainability efforts. 8. Signage and Wayfinding: For both vehicles and pedestrians, ensuring that directional and informational signage is well -placed. Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 388 of 395 Jane Fairall From: Sent: To: Cc: Subject: Scott Stiteler <tucsonurban@gmail.com> Thursday, October 31, 2024 2:42 PM Vicky Edwards Ramos, Jay; Rudy Dabdoub; Regan Jasper; Terry Rozema; Jane Fairall; Werner J. Meyer Re: Lease and Development Downtown Marana response PLEASE BE CAUTIOUS THIS MESSAGE AND SENDER COME FROM OUTSIDE THE TOWN OF MARANA. IF YOU DID NOT EXPECT THIS MESSAGE, PROCEED WITH CAUTION. VERIFY THE SENDER'S IDENTITY BEFORE PERFORMING ANY ACTION, SUCH AS CLICKING ON A LINK OR OPENING AN ATTACHMENT. Vicky, Attached letter and response should be dated 10/31 ® Happy Halloween! On Thu, Oct 31, 2024 at 2:39 PM Scott Stiteler <tucsonurban@gmail.com> wrote: Vicky, Thanks for requesting more clarity on this opportunity. 1. Yes, we support a fee structure that meets the requirements of the Gift Clause and demonstrates mutual benefit for Marana Urban and the Town. Ideally, the structure should favor the Town of Marana more than Marana Urban over the duration of the lease. 2. I've attached the response from Opus and Maran Urban regarding phase one costs. Thanks and please reach out anytime, Scott Scott Stiteler 1 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 389 of 395 Tucson Urban LLC Stellar Homes Inc. 415 259 8844 Scott Stiteler Tucson Urban LLC Stellar Homes Inc. 415 259 8844 2 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 390 of 395 September 10, 2024 Vicky Edwards Procurement Officer I Finance Town of Marana 11555 W Civic Center Dr Marana, AZ 85653 RE: Preliminary Infrastructure Cost Estimate for Downtown Marana Development Dear Vicky Edwards, Thank you for the opportunity to submit a preliminary infrastructure cost estimate for the Downtown Marana development. Below, we provide cost estimates for the key infrastructure components requested, which the Town of Marana will be supporting. We appreciate the Town of Marana's partnership in this development and look forward to furthering the vision for Downtown Marana. Should there be any questions or additional details required, please feel free to reach out. Sincerely, Scott Stiteler Partner I Marana Urban LLC 30 S 5th Ave Tucson, AZ 85701 Phone: 415.259.8844 Email: tucsonurban@gmail.com Jay A. Ramos Senior Director, Real Estate Development Opus Development Company, L.L.C. 2555 E Camelback Road, Phoenix, AZ 85016 Phone: 602.648.5065 Email: Jay.Ramos@opusgroup.com Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 391 of 395 Preliminary Infrastructure Cost Estimate 1. Temporary Parking Lot Description: A 600+/ space temporary parking lot spanning approximately 182,000 square feet, intended to support initial traffic demands for Phase One. The surface will use crushed gravel or similar temporary material to help control dust and ensure adequate parking in the early phases of development. Specifications: Dust mitigation and minimal grading for even surfaces are prioritized to create a functional, yet cost effective parking solution. Cost Estimate: $835,700 Includes: Site grading, gravel installation, and dust control measures. 2. Marana Illuminated Arches Description: Two striking, largescale illuminated arches bearing the "MARANA" name in bold, letters, set in a vintage industrial style. Inspired by early 20th century architectural designs, the arch will feature decorative circular elements above the lettering, echoing a rustic wagon wheel or gear motif. This visually prominent gateway will anchor each end of the brick paved roadway, elevating the town square ambiance. Specifications: Constructed from steel or metal, the arches include an elevated design that spans two brick buildings, creating a bridge like effect. String lights will be suspended around the area, contributing to a warm, inviting glow over the plaza setting below. Cost Estimate: $365,000 for each arch. Decision on one or two arches in phase one to be determined on cost savings. Includes: Structural materials, lighting installation, and labor. Brick -Paved Roadway (Phase One) Description: A pedestrian -friendly brick -paved roadway covering approximately 14,000 square feet for the initial phase, with sidewalks on both sides to encourage community interaction. This distinctive herringbone -patterned street will bring a historic charm, using warm, earthy tones that seamlessly complement adjacent brick architecture. Street Lighting: The street lighting will feature minimalist, industrial -style pole lights that add to the vintage charm of the brick -paved street and surrounding architecture. Each slender, dark -colored pole has a single fixture extending outward, casting a focused, warm light downward. Mounted at a medium height, these lights provide a cozy, inviting glow that enhances the brickwork and landscaping. Additional string lights overhead contribute a festive ambiance, creating a lively, communal atmosphere. Specifications: Curbs and brick -paver sidewalks will border both sides, providing a cohesive and accessible space for residents and visitors. The completed roadway will double this area in future phases, expanding this welcoming town square setting. Cost Estimate: $815,000 Includes: Paving, sidewalk installation, curbs, street lighting, and related labor. Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 392 of 395 4. Open -Air Easement Garden Description: This 9,000 square foot open-air garden serves as a social hub, featuring artificial turf to create a comfortable gathering space, bordered by breweries on both ends. Patrons can enjoy the casual atmosphere with seating areas on the turf and various venues surrounding the garden, forming a vibrant central attraction within the development. Specifications: Artificial turf provides a low maintenance solution, while tables and seating options enhance the inviting, communal setting. Surrounded by other venues, this beer garden will be a focal point for socializing and entertainment. Cost Estimate: $450,000 Includes: Artificial turf, seating, landscaping, and installation. 5. Monument Sign Along Interstate 10 Description: A large, attention -grabbing monument sign designed to be visible from Interstate 10, welcoming travelers and locals into Downtown Marana. This 40-foot high by 18-foot-wide sign will feature bold, distinctive elements —potentially including unique imagery or figures that represent Marana's identity —illuminated with neon or LED lighting to make it visible day and night. Specifications: Inspired by iconic signs such as the Hard Rock Cafe guitar, Pike Place Market sign in Seattle and Vegas Vic, this structure is intended to become a memorable landmark for Marana, standing out with vibrant lighting and a creative design that embodies the town's character. Cost Estimate: $1,375,000 Includes: Structural materials, lighting, electrical work, engineering, and installation. 6. Utilities Connection to Site Description: This infrastructure component involves establishing essential utility connections to support the site's initial and ongoing operations, including water, sewer, electricity, gas, and telecommunications. These connections are necessary to meet the demands of the planned development and ensure reliable, efficient service for all facilities on -site. Specifications: Water and Sewer: Includes installation of main water and sewer lines with capacity for fire protection, irrigation, and domestic use, meeting both current and future demands of the development. Appropriate stormwater management measures will be implemented to prevent flooding and manage runoff effectively. Electricity and Gas: Extension of electrical and gas lines to provide power and heating for buildings, public spaces, and lighting, ensuring reliable energy distribution across the development. Telecommunications: High-speed Internet and telecommunications infrastructure will be extended to the site, enabling modern connectivity for residents, visitors, and businesses. Cost Estimate: $700,000 Includes: Installation of main water and sewer lines, electrical and gas line extensions, stormwater management infrastructure, and telecommunications setup. Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 393 of 395 7. Landscaping Description: The landscaping for this development is designed to enhance the aesthetic appeal, create natural shade, and foster a welcoming atmosphere for visitors. It includes a combination of trees, shrubs, ground cover, and irrigation infrastructure to maintain the greenery throughout the first phase of the development. Specifications: • Trees: A total of 2,000 trees will be purchased, comprising 1,500 15-gallon trees and 500 24-inch box trees. These trees are strategically placed to provide shade, define pathways, and beautify the surroundings. The trees will be in planter boxes to allow them to grow and increase value before planting in a permanent location. • Shrubs and Ground Cover: Additional shrubs and ground cover will be installed to add visual interest, soften hardscape areas, and contribute to the overall greenery of the site. • Irrigation: An efficient irrigation system will be implemented to ensure sustainable water usage and maintain the health of all landscaping elements. The system will include automated controls for water conservation and efficient distribution across all landscaped areas. Cost Estimate: $612,500 Includes: Tree planting, shrubs and ground cover, irrigation system installation, and landscaping materials and labor. IInfrastructure Component Cost Estimate ($) Temporary Parking Lot $835,700.00 Marana Illuminated Arches (2) $730,000.00 Brick -Paved Roadway (Phase -One) $815,000.00 Open -Air Beer Garden (Turf) $450,000.00 Utilities Connection to Site $700,000.00 Landscaping $612,500.00 Monument Sign Along Interstate 10 $1375.000.00 Total $5.518.200.00 Marana Town Council Regular Meeting Agenda Packet November 19, 2024 Page 394 of 395 17370110 217370 21737073C 21737067A ZONE AO 1 ZONE X - SHADED Meeting'Agenda P 217370 0 Appendix A Duo MARANA . , �'. - C a 75 150 225 300 Feet Default Folder: 2024\E1 Paso Ga_FEMA_Zones