HomeMy WebLinkAboutResolution 2007-148 updating the stormwater management programMARANA RESOLUTION NO. 2007-148
RELATING TO PUBLIC WORKS; APPROVING AND AUTHORIZING AN UPDATED
VERSION OF THE TOWN OF MARANA STORM WATER MANAGEMENT PROGRAM
(PLAN) AS REQUIRED BY STATE AND FEDERAL LAW.
WHEREAS the Town of Marana is a regulated Phase 11 Small Municipal Separate Storm
Sewer System (MS4); and
WHEREAS the Town of Marana is mandated by the Arizona Department Of
Environmental Quality (ADEQ) to comply with Arizona Pollutant Discharge Elimination System
(AZPDES) Program requirements; and
WHEREAS the Mayor and Council adopted the original Storm Water Management
Program (Plan) on March 7, 2006; and
WHEREAS the Town of Marana submitted a Notice of Intent (NOI) to Discharge and a
Storm Water Management Program (Plan) (SWMP) in March of 2003 to the Arizona Department
of Environmental Quality (ADEQ) as required by the AZPDES Phase 11 implementation; and
WHEREAS the Town of Marana received an NOI authorization letter from ADEQ, and
the Town is operating under an MS4 stormwater permit; and
WHEREAS the Mayor and Council of the Town of Marana find that it is in the best
interests of the public to reduce stormwater pollution.
NOW, THEREFORE, BE IT RESOLVED BY THE MAYOR AND COUNCIL OF THE
TOWN OF MARANA, ARIZONA, that the Storm Water Management Program (Plan) for the
Town of Marana, attached as Exhibit A, is hereby approved, and the Mayor is hereby authorized
and directed to execute it for and on behalf of the Town of Marana.
IT IS FURTHER RESOLVED that the Town's Manager and staff are hereby directed and
authorized to undertake all other and further tasks required or beneficial to carry out the terms,
obligations, and objectives of SWMP.
PASSED AND ADOPTED BY THE MAYOR AND COUNCIL OF THE TOWN OF
MARANA, ARIZONA, this 4th day of September, 2007.
OF 4
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wsf?? OF( Mayor Ed Honea
ATTEST:
Town Clerk
(00005962.DOC /)
List of Abbreviations
AAC Arizona Administrative Code
ADEQ Arizona Department of Environmental Quality
ADOT Arizona Department of Transportation
ARS Arizona Revised Statutes
AZPDES Arizona Pollutant Discharge Elimination System
BMP Best Management Practice
CFR Code of Federal Regulations
CWA Clean Water Act
EPA Environmental Protection Agency, U.S.
FR Federal Register
MMC Marana Municipal Complex
MOC Marana Operations Center
MS4 Municipal Separate Storm Sewer System
NPDES National Pollutant Discharge Elimination System
PAG Pima Association of Governments
PCDOT Pima County Department of Transportation
PCFCD Pima County Flood Control District
SWMP Stormwater Management Program
SWPPP Stormwater Pollution Prevention Plan
SWP3 Stormwater Pollution Prevention Plan
UA Urbanized Area
VA Veteran's Administration
Water C.A.S.A. Water Conservation Alliance of Southern Arizona
WET Water Education for Teachers
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SWMP Revision History
March 2003, Initial Draft
Leslie Liberti, Intern, Town of Marana
Jennifer Ward, Environmental Engineering Technician, Town of Marana
First Revision: October 26, 2005
Lisa M. Duncan, Environmental Planner, Town of Marana.
Jennifer Christelman (formerly J. Ward), Manager, Environmental Engineering
Division, Town of Marana
Second Revision: April 2007
Corby Lust, Environmental Projects Coordinator, Town of Marana
Jennifer Christelman, Manager, Environmental Engineering Division, Town of Marana.
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Definitions
MS4 Operator: An operator of an MS4 can be a town, city, county; Department of
Transportation, tribe, flood control, drainage improvement or other special district;
university, prison, hospital, or other government - owned facility.
Municipal Separate Storm Sewer System (MS4): An MS4 is a conveyance or
system of conveyances that transport storinwater runoff. The stormwater conveyance
system is separate and distinct from a combined sewer system, which carries both
stormwater and wastewater. Storm sewer systems can be comprised of pipes, culverts,
municipal streets, detention or retention basins, curbs, gutters, natural channels or
ditches, man-made channels, drywells, and/or treatment systems designed to remove
pollutants from the first flush like oil/grease separators, sediment filters, or other water
quality treatments prior to discharge into the MS4.
Navigable Waters: Waters of the United States that either are connected to or
immediately adjacent to (therefore affecting) waters that may be navigated in interstate
commerce in the United States of America. Navigable waters of the U.S can include
oceans, streams (perennial, intermittent, or ephemeral), lakes, rivers, washes, playas,
wetlands, and natural or man-made channels (ADEQ, 2004).
Point Source: A point source is any discernible, confined and discrete conveyance,
including, but not limited to, any pipe, ditch, channel, tunnel, conduit, well, discrete
fissure, container, rolling stock, concentrated animal feeding operation, vessel, or other
floating craft from which pollutants are or may be discharged to navigable waters. Point
source does not include return flows from irrigated agriculture (ADEQ, 2004).
Pollutant: The term 'pollutant' (defined in A.A.C. R18-9-A901) can generally be
thought to encompass any chemical wastes, biological materials, or constituents
discharged to receiving waters. For example, pollutants could include bacteria from
wastewater discharges, sediments from construction projects or chlorine from a well
development project. Even groundwater redirected to a river could contain pollutants,
such as nitrates or metals, and the project could require an AZPDES permit (ADEQ,
2004).
Regulated Small MS4s: A regulated small MS4 is any small MS4 located in an
Urbanized Area (UA), as defined by the Bureau of the Census. Small MS4s that are
located outside of a UA can be brought under Phase II by the NPDES permitting
authority.
Small MS4s: A small MS4 is any MS4 not covered under Phase I of NPDES as a large
or medium MS4. Large MS4s are those that serve populations of 250,000 or more.
MS4s that serve a population of 249,999 to 100,000 are considered medium MS4s. In
addition some MS4s that served populations of less than 100,000 were brought under
the Phase I regulations and treated as a medium MS4 regardless of their actual
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population. There is no population threshold associated with small MS4s, although they
are typically understood to be entities with a population of less than 100,000.
Urbanized Area: Urbanized Areas (UAs) constitute the largest and most dense areas
of settlement. UA calculations delineate boundaries around these dense areas of
settlement and, in doing so; identify the areas of concentrated development. UA
designations are used for several purposes in both the public and private sectors. For
example, the federal government has used UAs to calculate allocations for
transportation funding, and planning agencies and developers use UA boundaries to
help ascertain current, and predict future, growth areas. The Bureau of the Census
determines UAs by applying a detailed set of published UA criteria (see 55 FR 42592,
October 22, 1990) to the latest decennial Census data. Although the full UA definition
is complex, the Bureau of the Census' general definition of a UA, based on population
and population density, is provided below. An urbanized area is a land area comprising
one or more places central place(s) -- and the adjacent densely settled surrounding
area -- urban fringe that together have a residential population of at least 50,000 and
an overall population density of at least 1,000 people per square mile (EPA, 2003).
Waters of the United States:
A. All waters that are currently used, were used in the past, or may be susceptible
to use in interstate or foreign commerce, including all waters that are subject to
the ebb and flow of the tide;
B. All interstate waters, including interstate wetlands;
C. All other waters such as intrastate lakes, rivers, streams (including intermittent
streams), mudflats, sand flats, wetlands, sloughs, prairie potholes, wet
meadows, playa lakes, or natural ponds the use, degradation, or destruction of
which would affect or could affect interstate or foreign commerce including any
waters:
i. That are or could be used by interstate or foreign travelers for recreational
or other purposes;
ii. From which fish or shellfish are or could be taken and sold in interstate or
foreign commerce; or
iii. That are used or could be used for industrial purposes by industries in
interstate commerce;
D. All impoundments of waters defined as waters of the United States under this
definition;
E. Tributaries of waters identified in subsections (a) through (d);
F. The territorial sea; and
Wetlands adjacent to waters (other than waters that are themselves wetlands) identified
in subsections (a) through (f) (ADEQ, 2004).
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TABLE OF CONTENTS
1 INTRODUCTION 1
1.1 Regulatory Background ......................................................... . ................................ 1
1.2 Arizona Small MS4s ................................................................................................. 2
1.3 Town of Marana ....................................................................................................... 4
1.4 Town of Mar2na Stormwater Management Program ... . ..................................... 4
1.5 Funding Mechanisms ............................................. . ......... . ...................................... 5
2 TOWN OF MARANA STORMWATER MASTER PLAN 7
2.1 Existing Stormwater Conveyance System ................. ........................ . .................. 7
2.2 Stormw2ter Policy and Criteria ................................. . ........................................... 8
2.3 Storinwater Management Alternatives ..................................................... ....... . ..... 8
2.4 Area-Specific Stormwater Alternatives .................................................... ............ 10
3 AZPDES PHASE H PROGRAM REQUIREMENTS 12
4 PUBLIC EDUCATION AND OUTREACH 15
4.1 AZPDES Requirements and Guidelines .................................... . ......................... 15
4.2 Efforts to Date ................... . ........................................................................ ............ 16
4.3 Action Plan for Public Education and Outreach ................................................. 18
4.4 Measurable Goals and Implementation .................................................... ............ 29
5 PUBLIC INVOLVEMENT AND PARTICIPATION 33
5.1 AZPDES Requirements and Guidelines .................... . .............. . ......................... 33
5.2 Efforts to Date ............................................................................................. ............ 34
5.3 Action Plan for Public Involvement and Participation ........................... ............. 36
5.4 Measurable Goals and Implementation ............ . .................................................. 44
6 ILLICIT DISCHARGE DETECTION AND ELIMINATION 48
6.1 AZPDES Requirements and Guidelines ........ . ..................................................... 49
6.2 Efforts to Date .. . ........... . ............................................................................ ............ 51
6.3 Action Plan for Illicit Discharge Detection and Elimination .................. ............ 59
6.4 Measurable Goals and Implementation .............................. ................................. 68
7 CONSTRUCTION SITE STORMWATER RUNOFF CONTROL 72
7.1 AZPDES Requirements and Guidelines ............................................................... 73
7.2 Efforts to Date ......................................................................................................... 74
7.3 Ordinances ........................................................................................... . .................. 77
7.4 Action Plan for Construction Site Stormwater Runoff Control ......................... 84
7.5 Measurable Goals and Implementation ................................................................ 91
8 POST-CONSTRUCTION STORMWATER MANAGEMENT IN NEW
DEVELOPMENT AND REDEVELOPMENT 93
8.1 AZPDES Requirements and Guidelines ............................................................... 93
8.2 Efforts to Date ......................................................................................................... 94
8.3 Action Plan for Post-Construction Site Stormwater Runoff Control ................ %
8.4 Measurable Goals and Implementation .............................................................. 100
9 POLLUTION PREVENTION/ GOOD HOUSEKEEPING FOR MUNICIPAL
OPERATIONS 103
9.1 AZPDES Requirements and Guidelines ............................................................. 103
9.2 Efforts to Date ............ . ......................................................................................... 104
9-3 Action Plan for Pollution Prevention/ Good Housekeeping for Municipal
Operations .......................................................................................................................... 109
9.4 Measurable Goals and Implementation .................................... . ........................ 111
10 IMPLEMENTATION CONSIDERATIONS 113
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10.1 Qualifying State or Local Program ....................... . ... . ................................ . ..... 113
10.2 Sharing Responsibility .......................................................................................... 113
10.3 Reviewing and updating the SWMP ...................... . ........................................... 113
10.4 Monitoring ................ . ........... . ................................. . ..... . ..... . ............................. 114
10.5 Annual Reports ..................... . ............ . ............... . .. . .......................... . ............... 114
APPENDIX A
Town of Marana AZPDES Compliance Area ............................... A-1
NOI and Revisions ............................................................... A-3
Table of Responsible Individuals ............................................ A-12
APPENDIX B
Illicit Discharge Detection and Elimination Procedures .................. B-1
Dry Weather Outfall Inspection Form ...................................... B-17
Community Response Report Form ......................................... B-19
APPENDIX C
Citizen Concern Procedures .................................................... C-1
Notice of Violation Letters ....................................................... C-3
APPENDIX D
Town of Marana Land Development Code - Title 19 ..................... D-1
Grading Permit Application and Checklists ............................... D-23
Residential and Commercial Permit Checklists ......................... -D-35
Form A - Major Utility Installation Permit ................................ D41
Form B - Public Improvement Dedication to Town permit ............ D45
Floodplain Use Permit .......................................................... D-52
Flood Hazard Information Sheet ............................................. D-53
Elevation Certificate ............................................................. D-54
Residential and Commercial Building Permit Applications ............ D-56
APPENDIX E
Service Request Form ............................................................ E-1
Facilities Maintenance Work Order Request Forms ....................... E-2
APPENDIX F
Pima County Stormwater Detention/Retention Manual .................. F-1
APPENDIX G
2000 Revised Development Requirements for Drainage in ............... G-1
Northern Marana
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I INTRODUCTION
Surface waters of the United States are susceptible to pollutants carried in stormwater and
urban runoff. Poorly managed stormwater systems can lead to high levels of nutrients,
bacteria, heavy metals, oils and excess sediment being discharged into rivers and washes
in Arizona. The potential consequences of uncontrolled stormwater runoff include
erosion of topsoil, the degradation of riparian habitat and modified hydrologic patterns,
resulting in flooding problems and contamination of drinking water sources.
Municipalities can prevent many of these impacts by encouraging or requiring
responsible land use practices within their jurisdictions. Prohibiting activities that
negatively affect the chemical, physical and biological characteristics of surface waters
will result in an effective stormwater management program that can lead to improved
water quality over time. The community will benefit by a reduction in storm sewer
system maintenance costs, reduced flooding problems, improved visual appearance of
receiving waters and the conservation of topsoil and vegetation, resulting in an enhanced
natural community of plants and habitat where wildlife and humans live and recreate.
1.1 Regulatory Background
"The 1972 amendments to the Federal Water Pollution Control Act (known as the Clean
Water Act [CWA]) provide the statutory basis for the National Pollutant Discharge
Elimination System (NPDES) permit program and the basic structure for regulating the
discharge of pollutants from point sources to waters of the United States. Section 402 of
the CWA specifically required the Environmental Protection Agency (EPA) to develop
and implement the NPDES program (EPA, 2003)."
The US EPA implemented the NPDES stormwater program in two phases. Phase I
covered large and medium-sized municipal separate storm sewer systems (MS4s), certain
industrial facilities, and construction activities that disturbed more than five acres. Phase
11 expanded the NPDES regulatory sphere to include construction projects disturbing one
or more acres and small MS4s that fall within an 'Urbanized Area' as defined by the
2000 U.S. Census completed by the United States Census Bureau. The Final Rule for
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Phase 11 regulations was published in the Federal Register at 64 FR 68721-68851 in
December 1999 and regulated facilities or jurisdictions are required to obtain permits by
March 10, 2003.
The CWA amendments allowed the EPA to authorize the NPDES Permit Program to
state governments, enabling states to perform many of the permitting, administrative, and
enforcement aspects of the NPDES Program. In states that have been authorized to
implement CWA programs, EPA retains oversight responsibilities (EPA 2003).
The State of Arizona assumed primacy over the NPDES program in 2002, with the
Arizona Department of Environmental Quality (ADEQ) being tasked with
implementation of the program through legislation codified by the Arizona Legislature in
the Arizona Administrative Code at 18 A.A.C. 9, Art. 9. This legislation established the
Arizona Pollution Discharge Elimination System (AZPDES). "Upon the effective date of
EPA approval of the AZPDES program, the Department shall, under A.R.S. Title 49,
Chapter 2, Article 3.1 and Articles 9 and 10 of this Chapter, administer any permit
authorized or issued under the NPDES program, including an expired permit that EPA
has continued in effect under 40 CFR 122.6" (ADEQ, RI 8-9-A902).
1.2 Arizona Small MS4s
The following entities are designated as regulated small MS4s within the State of Arizona
for the initial permitting term (2003-2007):
Cities
Apache Junction
Avondale
Cave Creek
Chandler
El Mirage
Flagstaff
Gilbert
Goodyear
Guadalupe
Litchfield Park
Marana
Oro Valley
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Paradise Valley
Peoria
Prescott
Prescott Valley
South Tucson
Surprise
Tolleson
Youngtown
Yuma
Counties
Coconino
Maricopa
Pinal
Yavapai
Yuma
Non-traditional MS4s
Arizona State University
Northern Arizona University
University of Arizona
Arizona Dept. of Corrections
Yuma Marine Corps
David-Monthan Air Force Base
Arizona State Hospital
Maricopa Community Colleges
Pima Community Colleges
Central Arizona College
Arizona Western College
Yavapai College
VA Medical Center
If any portion of a small MS4 falls within its respective Urbanized Area (UA), then only
that portion of the jurisdiction is required to comply with permit coverage under the
Phase 11 program.
The Town of Marana was designated as a small regulated MS4 because a small portion of
the Town falls within the Tucson UA; this area comprises the Town's current AZPDES
compliance area. The map in Appendix A illustrates the AZPDES-regulated portion of
Marana. With the rapid growth rate the Town is curTently experiencing, the Town expects
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a larger compliance area will be designated when the Urbanized Areas are re-assessed in
2007.
1.3 Town of Marana
The Town of Marana is a fast growing community northwest of the City of Tucson. The
Town is approximately 118 square miles and has a population of about 26,000. Over the
last decade, the Town's population grew by approximately 40% per year. Land use
within the Town of Marana is primarily vacant undeveloped land (560/6), agriculture
(22%), parks and open space (7%), Town-owned properties (50/o), and residential
development (5%). Existing light industrial activities include sand and gravel mines,
construction, and manufacturing facilities. Commercial and industrial facilities make up
just over 3% of the total land use in Marana. The Marana Regional Airport, located on
Avra Valley Road, is a municipal operation covered by an Industrial Stormwater permit.
The largest change in developed land use over the next 20 years is expected to be a
significant increase in the amount of residential development (Town of Marana General
Plan).
The major watercourses in the Marana. area are the Santa Cruz River, the Rillito Creek,
and the Caflada del Oro Wash. Of these watercourses only the Santa Cruz River, an
effluent-dominated ephemeral waterway, falls within the Tucson Urbanized Area and
thus within the Town of Marana's stormwater compliance area. There are numerous
ephemeral washes that drain into these larger waterways, but no known natural perennial
waterways exist within the Town of Marana boundaries. Runoff from both the Tortolita
Mountains (to the east) and the Tucson Mountains (to the west) also represents a major
component of the stormwater drainage pattern in the Marana. area.
1.4 Town of Marana Stormwater Management Program *W1
The Town of Marana developed this Stormwater Management Program (SWMP) to
comply with the requirements of the Arizona Pollutant Discharge Elimination System's
(AZPDES) small Municipal Separate Sewer System (MS4) permit (AZG2002-002) for
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stormwater discharges. The Town of Marana discharges under the current permit and
filed a Notice of Intent (NOI) with this SWMP to ADEQ in accordance with Part III and
Part V of the general permit. A copy of the NOI and subsequent revisions are included in
Appendix A of this document.
I- The Town of Marana intends to implement fully the conditions in this SWMP no later
than December 19, 2007. The Town will protect water quality by ensuring to the
maximum extent practicable that no discharge shall cause applicable water quality
standards to be exceeded.
1.5 Funding Mechanisms
The NPDES Phase 11 stormwater program is mandated through the Clean Water Act. This
federal legislation does not provide federal ftmds to cover the cost of program
coordination and implementation. Regulated jurisdictions are required to provide the
necessary staff, resources, and funding for their stormwater management programs.
Alternatives for ftinding municipal stormwater programs depend upon specific factors,
including the tax structure or water service systems. Some jurisdictions can ftind their
stormwater program through a dedicated "utility" fee. Although this does guarantee
substantial resources with which to implement a stormwater plan, it is contrary to the
desire that most citizens have for a reduced tax burden. As a result, a utility tax is often
an unpopular approach for a jurisdiction to take.
Municipalities such as the Town of Marana that, at the present time, do not elect to
impose an additional tax burden on their constituents must fall back on general funds to
implement stormwater programs. In the face of limited resources and stagnant
economies, few jurisdictions have a substantial amount of fimds to devote to a
stormwater management program.
With this constraint in mind, the Town of Marana has developed a stormwater program
that balances the objectives of the governing legislation with the limited resources of the
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Town. The program is designed to achieve the required outcomes as outlined in the MS4
General Permit, without posing an undue financial burden on the Town or the taxpayers.
The Town will apply for grants for applicable stormwater projects when they are made
available.
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2 TOWN OF MARANA STORMWATER MASTER PLAN
In 1998, the Town of Marana released a Stormwater Master Plan that consisted of an
evaluation of the stormwater system (Town of Marana Stormwater Master Plan Phase I
Report). This document detailed the existing drainage patterns and identified "specific
locations where major and local drainage and flooding problems/concems have been
identified." In 1999, a follow-up report was issued that discussed alternative methods of
managing stormwater that could be taken by the Town of Marana (Town of Marana.
Stormwater Master Plan Tortolita Alternative Formulation Report).
A summary of the results of the studies, as they relate to the SWMP, are presented below.
2.1 Existing Stormwater Conveyance System
The existing stormwater conveyance system in Marana is comprised of-
A. Bank stabilization measures along the Santa Cruz River that are designed for a
I 00-year flood discharge;
B. Culverts that convey stormwater runoff from the Tortolita Fan under Interstate 10
and to the Santa Cruz River;
C. A curb and gutter stormwater system that services the Ina Road/Thomydale
commercial area;
D. Constructed drainageways throughout the Continental Ranch subdivisions; and
E. Major detention basins and channel systems on the upper Tortolita. Fan to control
runoff associated with Dove Mountain developments.
Of these facilities, the curb and gutter system (C) and the constructed drainageways
within Continental Ranch (D) comprise the bulk of the stormwater conveyance system
within the Town of Marana's AZPDES compliance area.
The Ina/Thornydale area represents the core commercial area for the Town of Marana.
The curb and gutter system along these two major roadways collects stormwater runoff
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into storm drains and retention/detention basins and conveys it to the Caftada del Oro
Wash and subsequently the Santa Cruz River.
Continental Ranch represents an area of rapid development, primarily residential but with
a significant commercial component. Stormwater runoff from the Tucson Mountains and
from Continental Ranch subdivisions is carried Eastward through constructed and
stabilized drainage channels and empties into the Santa Cruz River.
2.2 Stormwater Policy and Criteria
The Town of Marana currently employs the following stormwater policy, criteria and
design standards:
A. The Pima County Department of Transportation and Flood Control District's
(PCDOT & FCD) Drainage and Channel Design Standards for Local Drainage;
B. The City of Tucson Department of Transportation's Standards Manual for
Drainage Design and Floodplain Management in Tucson, Arizona;
C. The PCDOT&FCD Stormwater Retention/Detention Manual; and
D. The PCDOT&FCD Hydrology Manual for Engineering Design and Floodplain
Management within Pima County, Arizona.
2.3 Stormwater Management Alternatives
The Alternative Formulation Report presents a number of methods for managing
stormwater concerns in Marana. These proposed management alternatives consist of non-
structural measures, structural measures, or a combination of both. 001
2-3.1 Non-structural Stormwater Alternatives
Significant non-structural stormwater pollution prevention control alternatives include:
A. The development and implementation of stormwater ordinances, policies,
standards, permits, or other regulatory controls to prevent pollution of runoff from
new or re-development projects. These regulatory controls may include grading
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ordinances, stormwater management ordinances, sediment and erosion control
ordinances, floodplain management ordinances, and subdivision ordinances.
B. Regulation of population density and the type of land use through zoning
ordinances.
C. The development and implementation of municipal inspection and maintenance
procedures. These include such practices as inspection of stormwater outfalls,
vegetation removal in concrete-lined channels, sediment and vegetation removal
from detention or retention basins, and maintenance of municipal vehicles and
facilities.
D. Periodic updates to the Town's Emergency Response Program (ERP). This pre-
planned set of steps to be taken by a community or government agency is
intended to "mitigate damage and reduce threats to public welfare", including
erosion and deposition of sediment.
E. Promotion of public education and outreach, and public participation and
involvement. Public awareness of stormwater issues can promote watershed
preservation and protection through an emphasis on the importance of individual
action in stormwater management.
Although the Alternative Formulation Report discusses other non-structural methods, the
methods presented here are those most compatible with the objectives of the AZPDES
legislation. Other non-structural stormwater control methods provide further
opportunities to meet or exceed the requirements of AZPDES if implemented in
conjunction with the Town of Marana Stormwater Master Plan.
2.3.2 Structural Stormwater Measures
Structural stormwater measures primarily involve the construction of stormwater storage
and conveyance infrastructure. By developing and implementing these structures in
manner that promotes improved stormwater quality (i.e. reduced pollutants), rather than
just as a means of controlling stormwater quantities and flows, these measures can
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provide substantial benefits to the Stormwater Management Program as required under
AZPDES.
2.4 Area-Specific Stormwater Alternatives
The Town of Marana was divided into six (6) geographically-defined planning areas.
Two of these subsections, Stormwater Planning Area I and Stormwater Planning Area 2,
roughly coincide with the Town of Marana's AZPDES compliance area.
2.4.1 Stormwater Planning Area I
Area I extends from Cortaro Road, on the north, to the southern border of the Town,
which is located near Sunset Road. This area includes a portion of the Santa Cruz River
and the Cafiada del Oro Wash, the confluence of the Santa Cruz and the Rillito Creek and
commercial areas along Ina, Thornydale, and Orange Grove Roads. In addition to
containing the existing commercial hub of the Town of Marana (the Ina/Thornydale
area), the following land uses are found along the major watercourses within this
Planning Area: sand and gravel operations, industrial park facilities, and residential
development.
The typical urban drainage system of curb and gutter, constructed drainageways, and
storm drains characterizes the Ina/Thomydale area. Most of the development in this area
is recent and thus conforins to current drainage design standards with respect to the
implementation of stormwater detention/retention facilities.
Proposed stormwater management activities for Area I include removal of sediment from
"dip crossings" along Silverbell Road after significant stormwater flows and enforcement
of standards for future new-development within the area.
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2.4.2 Stormwater Planning Area 2
Area 2 consists of that area north of Stormwater Planning Area I and south of Lambert
Road. Continental Ranch, which represents the bulk of Area 2, is heavily developed at
present and any remaining available land is rapidly being converted into residential
subdivisions. The major watercourse feature in Area 2 is the Santa Cruz River.
The Continental Ranch stormwater drainage system consists of street flow, constructed
drainageways, and a limited amount of curb and gutter. Most of the development in this
area is less than twenty years old and conforms to current drainage design standards.
Proposed stormwater management activities for Area 2 include removal of sediment from
"dip crossings" along Silverbell Road after significant stormwater flows and enforcement
of standards for future new-development within the area.
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3 AZPDES PHASE 11 PROGRAM REQUIREMENTS
The US EPA requires States to ensure that all regulated municipal separate storm sewer
systems (MS4s) develop a stormwater management program that complies with the
National Pollutant Discharge Elimination System (NPDES) program, codified in the
United States Code of Federal Regulations in Title 40, Parts 122, et seq. The Arizona
Department of Environmental Quality (ADEQ) assumed primacy under Section 402 of
the Clean Water Act in 2002 and now administers the NPDES program under the Arizona
Pollutant Discharge Elimination System (AZPDES). The AZPDES program took the
Minimum Control Measure (MCM) guidelines outlined by the EPA and made them
requirements. The EPA established these guidelines with the goal of preventing
pollutants from entering waters of the United States through urban stormwater runoff to
the municipal separate storm sewer system.
To obtain an AZPDES permit, the MS4 must develop and submit a Stormwater
Management Program (SWMP) that, at a minimum, includes the following elements:
A. Best management practices (BMPs) for implementing each (MCM) to the
64maximum extent practicable"
B. Measurable goals that outline the steps to achieving each BMP
C. Implementation schedule that specifies the timing and frequency of stormwater
management activities
D. Responsible party/parties that will coordinate the implementation of each MCM
ADEQ has defined Six MCMs necessary for AZPDES compliance:
1. Public Education and Outreach
2. Public Involvement and Participation
3. Illicit Discharge Detection and Elimination
4. Construction Site Stormwater Runoff Control
5. Post-Construction Stormwater Management
6. Pollution Prevention and Good Housekeeping for Municipal Operations
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The following sections outline the Stormwater Management Program for the Town of
Marana, and include: 1) a description of each MCM and ADEQ guidelines for
compliance; 2) information on existing Town activities that promote stormwater pollution
prevention; and 3) an action plan and associated schedule for meeting the requirements of
each MCM during the permit period.
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4 PUBLIC EDUCATION AND OUTREACH
The key to effective implementation of a stormwater management program is to foster
community awareness and understanding of the issues surrounding stormwater pollution.
Most people are unaware that stormwater flows are one of the most significant sources of
water pollutants. Support for stormwater management increases when the public
understands the importance of stormwater pollution prevention and recognizes their role
in protecting local waterways. As a result, public support for the SWMP increases the
degree of local compliance with program requirements.
4.1 AZPDES Requirements and Guidelines
The AZPDES Stormwater Phase II program MCM for public education and outreach
requires regulated MS4s to "implement a public education program to distribute
educational materials to the community or conduct equivalent outreach activities about
the impacts of stormwater discharges on water bodies and the steps that the public can
take to reduce pollutants in stormwater runoff." (V.B. La)
AZPDES regulations require that a permittee's SWMP include the following information:
AZPDES Requirement V.B.Lb
i. A description of the education program and outreach activities;
ii. A description of the methodsfor disseminating information;
iii. The target audiences and target pollutants and sources that the applicant
will address in the program, and how they were selected,
iv. An estimation of the number ofpeople with whom the applicant intends to
communicate;
V. A list ofmeasurable goalsfor the public education and outreach program;
vi. Dates, in terms of months andyears, by which the permittee will achieve
specific measurable goals; and
vii. The name(s) and title(s) of theperson(s) responsiblefor implementing and
coordinating the education activities.
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4.2 Efforts to Date
The Town currently supports the following pollution-related public education and
outreach efforts:
4.2.1 Adopt-A-Roadway
An organization may adopt a specified two-mile reach of roadway in this program. The
organization must commit to one year in the program and must collect trash and debris 4W
from the sides of the roadway at least four times during that year. The Town developed
brochures about the Adopt-a-Roadway program requirements and related safety issues.
Nineteen of the twenty sections of roadway available for adoption were adopted in 2003.
4.2.2 Neighborhood Clean-Up
The Town of Marana conducts various neighborhood clean up events. These events
solicit local volunteers to pick up trash and debris in and around Town neighborhoods.
Flyers advertising these events are created once dates and times are confirmed. Clean
ups are performed twice annually.
4.2.3 Household Hazardous Waste
In the past, the Town has sponsored a household hazardous waste collection day. Due to
low turnout, it will be more effective in the future to coordinate with Pima County's
successful Household Hazardous Waste Program. The Town will advertise the County's
program and encourage participation by Town residents.
4.2.4 Informational Material Distribution
The Town of Marana Public Works Department and the Water Department have created
several brochures relating to stormwater available for the public. These brochures will be
made available in various Town lobbies or upon request. Brochures may change as new
or updated information becomes available.
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4.2.5 Water C.A.S.A.
The Town of Marana Water Department is a member of the Water Conservation Alliance
of Southern Arizona (Water C.A.S.A.). The local water districts and small municipalities,
which make up the Water C.A.S.A. membership work together to distribute water
conservation information to the public. Member organizations do not have the resources
to develop these materials individually.
4.2.6 Employee Bulletin Board
The Town of Marana has several employee bulletin boards devoted entirely to
information on topics such as carpooling, travel reduction, air quality, waste reduction
and recycling.
4.2.7 Recycling
The Town of Marana provides a bin for recyclable materials in the employee cafeteria. In
addition, each employee has a paper recycling bin by his/her desk. Items that may be
recycled include paper, cardboard, plastic and magazines. In September of 2006, the
Town of Marana was awarded a Waste Reduction Initiative Through Education (WRITE)
grant from ADEQ to educate Marana residents and business entities about recycling.
4.2.8 Treecycle
The Town of Marana participates in a larger Christmas tree recycling program sponsored
by the City of Tucson. Each year Marana hosts a number of recycling sites where trees
can be dropped off free of charge. The purpose of the program is to prevent trees from
being dumped in washes or on vacant land. The trees that are collected are mulched and
used to stabilize slopes, for erosion control, and in other environmental projects.
Brochures are sent out with the Continental Ranch Homeowners' Association newsletter,
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which reaches approximately 6200 individuals within the Town of Marana compliance
area, and in the Marana Chamber of Commerce newsletter.
4.2.9 Water Use Monitoring
The Town of Marana Water Department performs another service that will notify
customers when their water usage is higher than normal. This service helps homeowners
identify when they might have leaks that need repair.
4.2.10 Water Conservation Audits
Upon request, the Town of Marana Water Department will perform an audit of a
customer's home water use. Auditors will identify areas of high water use in the home
and attempt to locate any leaks. This service ensures that Marana Water Department
customers have minimal problems with water runoff from their properties.
4.2.11 Adopt-A-Trail (In development)
The Town of Marana Parks and Recreation Department is currently developing an Adopt-
a-Trail program. This program will require participants to clean up local trails regularly.
The Parks and Recreation Department hopes to have this program implemented in the fall
of2006.
4.3 Action Plan for Public Education and Outreach
Th e Town of Marana's action plan for public education and outreach on the impact of
stormwater pollution is described below. The format is structured according to the
guidelines provided by ADEQ.
Is
4.3.1 Education Program and Outreach Activities
V.B.Lbd Include in the SWMP a description of the education program and
outreach activities.
4.3.1.1 Brochures
Town staff will develop and distribute brochures to target audiences. The brochures will
include information about the types of pollutants generated by the target audience, what
that target audience can do to help reduce stormwater pollution, relevant stormwater
pollution facts, and contact information for the Town of Marana for submitting questions
or concerns. The types of brochures to be developed are as follows:
A. Household brochure: The focus of this brochure will be on reduction of household
stormwater pollution and include information regarding proper septic system
maintenance, use and disposal of garden chemicals, and disposal of household
hazardous materials. There will be both Spanish and English versions of this
brochure.
B. Municipal employee brochure: The focus of this brochure will be on what
employees can do at home to reduce stormwater pollution and the responsibilities
of the Town of Marana to both manage and reduce stormwater pollution.
C. Targeted brochure: These brochures will be targeted at specific commercial
groups. The focus of these brochures will be those stormwater pollutants most
prevalent in each commercial group targeted, what steps the target businesses
should take to reduce the discharge of these pollutants, and tips for businesses to
educate their employees about stormwater pollution prevention requirements.
Targeted commercial groups may include: restaurants; auto service facilities and
gas stations; aggregate, mining, or contracting operations; hotels/motels; and
developers and contractors.
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4.3.1.2 Stormwater Pollution Prevention Library
The Town of Marana will provide a library of educational material pertaining to
stormwater pollution prevention. The materials for the library will be collected from
federal, state, and local agencies and from any relevant websites. The Environmental
Engineering Division staff will review library materials annually and update or add
materials as necessary.
4.3.1.3 Contact Person
The Town of Marana will designate a principal contact and create a procedure for
effective and timely response to public inquiries, comments, or concerns regarding
stormwater pollution and reports of illegal waste disposal. The Town will revise the
public information contact process as necessary to respond to community needs. The
designated staff member will note all comments received in a database maintained for the
stormwater management program.
4.11.4 Stormwater Website
Staff will develop a stormwater website and make it accessible through the Town of
Marana's website. This site will provide information regarding stormwater pollution
prevention, ways people can help, activities they can take part in, and contact information
(phone, address, fax, and e-mail) where the public may express concerns or comments
and report illegal dumping or other violations. Once the website is completed, major
educational institutions, environmental interest groups, and governmental entities within sw?
the region will be contacted and asked to provide links on their own websites to the Town
of Marana's stormwater website.
The Stormwater website also includes guidance documents for the construction industry
regarding Stormwater Pollution Prevention Plans. These documents include the NOI
form, NOT form, ADEQ Construction SWPPP Checklist, ADEQ Construction General
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Permit Fact Sheet, and the AZPDES Construction General Permit. Additional guidance
materials may be added as they are developed.
4.3.1.5 Educational Materials
The Town of Marana will gather and develop educational materials and make them
available online and in various public access locations for use in school classes. Staff will
review materials annually and update as necessary. Staff will contact the Marana Unified
School District schools about the materials and ask to incorporate them into their
curriculum where possible. This may include staff visiting schools for presentations of
activities and materials.
4.3.1.6 Storm Drain Marking
Many people are unaware of the connection between discharges to the storm drain and
pollution of surface waters. Storm drain marking provides a visual reminder of that
connection and increased awareness can promote public attention to illicit discharges and
other actions that may contribute to stormwater pollution. Storm drain marking is a way
of both informing the public about the importance of controlling discharges into the
municipal storm sewer system and involving them in the prevention of stormwater
pollution. The Town of Marana coordinated with other local jurisdictions to utilize a
regional logo for storm drain marking to create regional recognition of the program.
4.3.1.7 Database
To facilitate coordination and implementation of all six minimum control measures,
including public education and outreach, a database will be developed by the stormwater
program coordinating staff. This database will track information such as the materials
available in the stormwater library, public comments regarding the stormwater program,
and educational materials.
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43.2 Information Dissemination
V. B. 1. b. ii Include in the SWMP a description of the methodsfor disseminating
information.
4.3.2.1 Brochures
Town of Marana staff will distribute brochures in the following manner:
A. Household brochures: The Town will make these brochures, both English and
Spanish versions available to the public at Town of Marana municipal buildings
and will send them to all neighborhood associations within the compliance area
for distribution to residents. The Town of Marana will continue to coordinate with
the Pima Association of Governments on regional outreach material including
brochures.
B. Municipal employee brochures: Staff will send out a stormwater brochure with
Town of Marana employee paychecks.
C. Targeted entities brochures: The Town will send out these brochures through
direct mailing; include as inserts in utility bills or business licenses; or distribute
through mailings of trade associations, the Chamber of Commerce, or other
related organizations.
4.3.2.2 Stormwater Website
The stormwater website will be advertised in brochures created for the intent of meeting
the requirements of the SWMP. The website will also be advertised at any regional
construction seminars as it contains several guidance documents for the construction
industry.
4.3.2.3 Stormwater Pollution Prevention Library
The stormwater pollution prevention library will be generated under the SWMP and
advertised through the Town of Marana's stormwater website. All materials will be
available to the public upon request.
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4.3.2.4 Contact Person
Contact information for staff coordinating the stormwater program may be disseminated
through the website, brochures, and any other educational, informational, or presentation
materials.
4.3.2.5 Educational Materials
Educational materials will be posted on the Town of Marana's stormwater website and
may be sent to various public access locations, such as libraries. Notices will be mailed
directly to each school informing them of the availability of staff resources for school
presentations on stormwater that will include material that is consistent with curriculum
standards.
4.3.2.6 Storm Drain Marking
The logo that is used for the storm drain markers will be advertised in applicable
brochures generated under the SWMP, through the Town of Marana's stormwater
website, and in applicable educational or presentation materials.
4.3.3 Target Audiences
VRIAW Include in the SWMP the target audiences and target pollutants
and sources that the applicant will address in the program, and
how they were selected
Target audiences include households (public), minority groups, Town of Marana
employees, construction, industries and businesses recognized as potentially significant
contributors to stormwater pollution. These audiences were chosen, not because they are
seen as producing significant levels of stormwater pollution at present, but because the
Town wishes to take a proactive approach by providing educational opportunities to the
entire community for leaming about stormwater pollution and ways to prevent it. These
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particular audiences offer the greatest potential to achieve stormwater pollution reduction
goals.
4.3.3.1 General Public:
Much of the stormwater pollution problem stems from lack of educating the general
public. This group was selected as an important audience because all members of the
community, regardless of occupation, interact with the stormwater system as members of
a household. Making information available to households will help reduce the problem
of household stormwater pollution by increasing awareness of how individuals, often
unknowingly, contribute to stormwater pollution and by providing simple steps that the
public can take to prevent the discharge of pollutants into the stonn sewer system. The
difficulty of reaching a dispersed population will be partially offset by efforts to provide
stormwater pollution prevention information to organized interest groups within the
community
A stormwater website will be used to target the public because it makes information
available in a convenient manner to a large percentage of the community. The website
LLi
can also be updated easily to provide information to the public regarding upcoming
opportunities to become involved in the stormwater program. Brochures will also be OW
used to educate households so that information is available to individuals who do not
have access to the stormwater website.
4.3.3.2 Targeted Commercial Groups
Certain businesses or industry 1L3,pes can significantly contribute to stormwater pollution
by discharging large amounts of pollutants or by releasing potentially dangerous
pollutants into the storm sewer system. Anticipated target groups may include:
hotels/motels, restaurants, aggregate operations, mining operations, contractors, auto
service facilities, and gas stations.
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75% of businesses within the compliance area that fall within one of the targeted
categories will receive a target-specific brochure. Brochures were chosen for this
purpose because they can provide detailed information to the specific target groups.
4.3.3.3 Youth
Providing education materials to community youth and building linkages with education
institutions is a proactive approach to addressing the issue of stormwater pollution.
Educational materials developed for youth may include activities, puzzles, contests for
artwork, and calendars.
4.3.3.4 Minorities
The largest minority group within the Town is the Spanish-speaking community. To
ensure that the Town of Marana reaches this segment of the population, the Town will
make the household brochure available in both English and Spanish.
4.3.4 Target Pollutants
V. A 1. b. W Include in the SWMP the target audiences and target pollutants
and sources that the applicant will address in the program, and
how they were selected
4.3.4.1 Household Pollutants
The household pollutants targeted were chosen in a proactive attempt to prevent or
reduce future pollution problems. In the case of businesses and industry, the pollutants
targeted will be those most prevalent in each specific target area.
The target pollutants that will be addressed in the household brochure and in any other
materials directed toward the public, for the purposes of education and outreach, may
include:
A. Lawn and garden chemicals, including herbicides, pesticides, and fertilizers;
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B. Oil, anti-freeze, brake fluid, and power steering fluid;
C. Household hazardous waste such as batters, household cleaners, and medicines; 04?
D. Household chemicals such as paint thinners, oil-based paint, pool and spa
chemicals, automotive and household detergents, cleaners, and bleaches; and
E. Soil sediment runoff from bare soils in yards and gardens.
4.3A.2 Commercial Pollutants
Although generalized educational materials are suitable for outreach to the public,
materials provided to specific commercial groups must be tailored to the activities of the
target audience. During the permit period, a list of the pollutants produced by business or
industry that need to be targeted will be determined through focus group meetings with
target groups, discussions with community leaders, feedback from the public, and
research into industry procedures.
4.3.5 Population Reached
V. B. 1. b. iv Include in the SWMP an estimation of the number ofpeople with whom
the applicant intends to communicate.
The Town of Marana can reach most of the households within the AZPDES compliance
area using brochures sent out with neighborhood association newsletters.
The bulk of the current compliance area is the Continental Ranch subdivision. The
Continental Ranch homeowner's association newsletter reaches approximately 6200
residents, which represents approximately a third of the entire Marana population at the
2003 filing date of the Town's NOI . Silvermoon is a second homeowner's association
within the Town of Marana AZPDES compliance area. Brochures sent out with this
neighborhood's newsletter will reach 101 households and an estimated 275 to 325
residents. Pima Farms/Scenic Drive Neighborhood Association is an organization that
does not distribute newsletters. The association president does contact most of the 42 SOW
households regularly by email.
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The Town of Marana will keep a comprehensive list of businesses within jurisdictional
limits and businesses outside of those limits that operate within the Town. This list will
be updated annually or as needed. In addition, these businesses will be contacted through
brochures each year. These groups may include hotels/motels; auto services; aggregate,
mining, or contracting operations; and restaurants. The Town will send these brochures to
approximately 75% of businesses listed above.
4.3.6 Measurable Goals
VB.I.b.v Include in the SWMP a list of measurable goalsfor the public education
and outreach program.
The BMPs and measurable goals for each public education and outreach activity can be
found in Table One: Public Education and Outreach Measures and Milestones
(found on page 29).
The Town will provide or update the following information in the annual MS4
compliance report:
1. Staff
a. Name and position of persons working on public outreach and education
program
2. Brochures
a. Date brochures developed or updated
b. Number of brochures distributed for each target group (i.e. households,
construction, other target industries)
3. LibMa
a. Number of visits to library
b. Material added to library
4. Contact Rersop?Rrocedure
a. Name of acting contact person
b. Number of known locations (websites, information guides, phone book,
etc.) in which contact information is publicized
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5. Website
a. Date website developed or updated
b. Number of hits to Stormwater web pages
6. Storm drain marking
a. Number of drains marked
7. Educational materials
a. List of materials collected from other sources into stormwater references
b. List of materials accumulated
c. Date material(s) developed or updated
d. Number of schools/education programs contacted regarding the materials
e. Description of locations where education materials were made available to
schools/public
f. Number of calendars or educational materials other than brochures
distributed.
4.3.7 Implementation Schedule
VB.I.b.vi Include in the SWMP dates, in terms of months andyears, by which the
permittee will achieve specific measurable goals.
The dates by which each measurable goal will be achieved are specified in Table One:
Public Education and Outreach Measures and Milestones (found on page 29).
43.8 Staff
V B. 1. b. vii Include in the SWMP the name(s) and title(s) of the person(s)
responsible for implementing and coordinating the education
activities.
A full-time staff member is the primary coordinator and implementer of the outreach and
education program. A list of individuals responsible for stormwater outreach and
education is included in Appendix A. The Town of Marana will update all information
contained in the Appendices as necessary, and immediately send the updated information
to ADEQ to maintain compliance with the MS4 permit requirements. In the event that
any individual is no longer available to work on the stormwater program, the Town of
Marana will assign a replacement.
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4.4 Measurable Goals and Implementation
The public education and outreach BMPs, and the measurable goals the Town will use to
implement and track them, are outlined in the following Table. Also included is the
implementation schedule and references to the relevant ADEQ requirements.
Table One: Public Education and Outreach Measures and Milestones
Reference BMP Measurable Goal Target Date
V.B. La 1. The Town a. Develop position requirements. a.Feb.2003
V.B. Lb of Marana
will hire a b. Create position; approval of Town b. June 2003
full-time staff Council is required.
person to
coordinate c. Hire full-time staff person. c. July 2003
and
implement the
education and
outreach
program-
V.B. La 2. Staff will a. Categorize target audiences that have a. July 2003
V.B. Lb generate and the greatest potential to impact the storm
distribute a set drainage system; identify major water
of target-o quality concerns of each target audience.
specific
brochures. b. Develop brochures, including a b. Dec.
Spanish translation of the household 2004
brochure.
c. Identify contact information for each c.Feb.2005
target group including the organizations
and associations that regularly distribute
information to specific target groups.
d. Identify potential partner d.Feb.2005
organizations that can assist in the
distribution of brochures and other
materials.
e. Distribute brochures to the residents e. Mar.
and target businesses that fall within the 2005,
Town's compliance area. At the end of periodic
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the five-year permit period, the Town of
Marana expects to have reached: 75% of
all households covered by homeowner's
associations, 75% of the
construction/development community,
75% of auto service facilities, 75% of
sand and gravel/aggregate operations,
75% of hotels/motels, and 75% of
restaurants.
f. Review brochures and update as
necessary.
Mar.
2006,
annually
thereafter
V.B.I.a 3. Staff will a. Catalog education material pertaining a. May 2003
V.B. Lb create a to stormwater pollution currently held
Stormwater by the Town of Marana.
Pollution
Prevention b. Identify a physical location for the b. May 2003
Library. library.
c. Contact federal, state, and local c. July 2003
agencies and search for any relevant
stormwater websites to gather additional
material.
d. Develop a catalog (database) of the d. Aug.
materials. 2003
e. Advertise the Library through e. Begin
brochures, Stormwater website, and any Feb.2004,
other educational or presentation ongoing
materials.
f, Update library; Collect any new or f. Dec.
revised materials and add to library. 2004,
annually
V.B. La 4. Staff will a. Identify a principal contact person. a. Mar.
V.B. Lb designate a 2003
public b. Create a procedure for effective and b. Apr. 2003
information timely response to public inquiries,
contact person comments, or concerns regarding
and stormwater pollution and to reports of
procedures. illegal waste disposal.
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c. Advertise contact information so that c. Begin
residents are aware of whom to call or Nov. 2003;
email. ongoing
d. The stormwater contact person will d. Begin
review information and comments from Nov. 2003;
the public and determine the best ongoing
response. Appropriate responses may
include providing information over the
phone, by email, or by postal mail;
referring the caller to another Town
employee for follow-up; or forwarding
the information provided to the
appropriate department.
e. Review the public information contact e. Periodic,
process and revise as necessary to as needed
respond to- community needs.
V.B.La 5. Staff will a. Identify the person(s) responsible for a. Jul. 2004
V.B. Lb create a developing and maintaining the website.
Stormwater
Website. b. Work with a consultant to create the b. Mar.
website. 2005
c. Advertise the website in Marana c. Begin
water bills, brochures, and any other Aug. 2005,
educational or presentation materials. ongoing
d. Contact major educational d. Jul., 2005
institutions, environmental interest
groups, and governmental entities
within the region and ask to provide
links on their own websites to the Town
of Marana's stormwater website.
e. Review the website and update as e. Sep.
needed to include new or revised 2005,
information. annually
V.B.La 6. Staff will a. Enlist the aid of volunteer a.Feb.2005
V.B.Lb develop a organizations, schools, and/or
Storm Drain individuals. These groups may include,
Marking but are not limited to neighborhood
Program. associations, schools, civic groups, and
interest groups. (The Town of Marana
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has determined that due to public safety
concerns, this activity will be the b.Feb.2005
responsibility of the Operation and
Maintenance Department and will be
moved to the IDDE section). c. Mar.
2005
b. Determine procedure for marking and
ordering materials.
d. Mar.
c. Using storm sewer system map, 2005,
prioritize storm drain inlets according to ongoing
potential risk.
d. Mark all storm drain inlets within the
five-year permit period.
V.B.La 7. Staff will a. Identify themes or topics to address in a. Jan. 2005
V.B.l.b create educational materials; determine age
Stormwater groups to be targeted.
Pollution
Prevention b. Collect existing educational b.Feb.2005
Educational materials; Develop additional
Materials. materials.
c. Post materials on the stormwater c. June 2005
website and place in other public access
areas, such as libraries, Marana
Municipal Complex, etc.
d. Contact Marana school district and d. June 2005
ask that the materials be incorporated
into the curriculum where possible and
discuss ftuther water quality educational
opportunities in the classroom;
Contact Project WET sponsors and
other environment-oriented education
groups, and ask them to include this
material in their teacher training
workshops. At the end of the five-year
permit period, the Town of Marana
expects to have reached 25% of school-
a ed chi dren in the compliance area.
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5 PUBLIC INVOLVEMENT AND PARTICIPATION
Efforts by the Town to involve the public in the development and implementation of the
stormwater management program creates the opportunity to bring together much needed
community support and increase the level of compliance with program requirements. The
success of a public involvement/participation effort relies on early and frequent
involvement opportunities that build the community's sense of ownership in the
stormwater management effort.
5.1 AZPDES Requirements and Guidelines
The AZPDES minimum control measure requirements for regulated MS4s public
involvement/participation include the following BNVs:
A. Develop and implement a plan to encourage public involvement and participation
in the development and implementation of the SWMP (V.B.2.a)
B. Comply with state and local public notice requirements when implementing the
public involvement/participation program (V.B.2.b)
AZPDES requires that a permittee's SWMP include the following minimum control
measures for public involvement and participation:
AZPDES requirement V.B.2.c
i. A description of the general planfor informing the public of involvement
andparticipation opportunities;
ii. The types of activitiesfor public involvement that the program will include
and the target audiences;
iii. A description of the procedurefor receiving and reviewingpublic
comments;
iv. An explanation of how interestedparties may access the SWMP and NOI,-
V. A list of measurable goalsfor the public involvement1participation
program;
vi. Dates, in terms of months andyears, by which the permittee will achieve
specific measurable goals;
vii. The name(s) and title(s) of the person(s) responsiblefor implementing and
coordinating the education activities; and
viii. How the public was involved in the development of the SW.Affl submitted
with the N01.
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5.2 Efforts to Date
The Town of Marana currently supports the following pollution prevention public
involvement and participation efforts:
5.2.1 Marana Town Code
Marana's Town Code includes provisions that encourage public participation in travel
reduction efforts. The relevant sections of Code are as follows:
Title 10: Health and Sanitation
Travel Reduction Code - Purpose (Section 10-4-1)
"The purpose of this chapter, recognizing that motor vehicles are the single greatest
contributor to air pollution, is to improve air quality and reduce traffic congestion within
the incorporated and unincorporated areas of Pima County by increasing alternate mode
usage and reducing overall motor vehicle travel for commute trips. This chapter shall
establish a basis for cooperative effort of the local jurisdictions to achieve a uniform
program for reduction of work related trips by employees working for major employers
subject to this regulation."
Applicability voluntary participation (Section 10-4-4)
A. "The provisions of this code shall apply to all major employers."
B. "Employers or groups of employers with less than 100 full time equivalent
employees at a single work site are encouraged to participate in data collection
and information dissemination efforts and in the preparation of their own travel
reduction plans on a voluntary basis. These groups shall be assisted by the TRP
task force, the TRP technical advisory committee and TRP staff, and shall be
eligible for participation in all programs and services. Groups of employers are
encouraged to form transportation management associations."
Requirementsfor employers (Section 10-4-5)
"In each year of the regional program . each major employer shall:
A. Provide each regular employee with information on alternative mode options and
travel reduction measures including, but not limited to: Sun Tran bus routes and
schedules, the Rideshare program, and bicycle routes. This information shall also
be provided to new employees at the time of hiring.
B. Participate in a survey and reporting effort, forms for which will be provided by
the TRP task force. The results of this survey shall form a baseline against which
attainment of the targets in this section shall be measured as follows:
1. The baseline for participation in alternative modes of transportation shall
be based on the number of employees.
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2. The baseline for VMT [vehicle miles traveled] shall be the average VMT
per employee for employees not residing on the work site.
C. Prepare and submit a travel reduction plan for submittal to TRP staff and
presentation to the TRP Task Force. TRP staff will assist in preparing the plan.
Major employers shall submit plans within nine weeks after they receive survey
data results. The Plan shall contain the following elements:
1. The name of the designated transportation coordinator.
2. A description of employee information programs and other travel
reduction measures which have been completed in the previous year.
3. A description of travel reduction measures to be undertaken by the major
employer in the coming year...
D. An approvable travel reduction plan shall meet all of the following criteria:
I . The plan shall designate a transportation coordinator.
2. The plan shall describe a mechanism for regular distribution of alternate
mode transportation information to employees.
3. For employers who in any year, meet or exceed annual regional targets for
travel reduction the plan shall accurately and completely describe current
and planned travel reduction measures.
4. For employers who, in any year, fall below the regional targets for travel
reduction, the plan shall include commitments to implement:
a. At least two specific travel reduction measures ... in the first year
of the regional program.
b. At least three specific alternate modes incentives programs ... in
the second year of the regional program.
5. After the second year, the travel reduction program task force shall review
the travel reduction programs for employers not meeting regional targets
and may recommend additional measures.
E. Employers shall implement all travel reduction measures considered necessary by
the task force to attain the following target employee participation in alternate
modes or commuter trip VMT Reductions per regulated work site:
1. 15% of the total employee pool in the first year of the regional program.
2. 20% of the total employee pool in the second year of the regional
program.
3. 25% of the total employee pool in the third year of the regional program.
F. After the third year of the regional program, either:
I . An increase in employee participation in alternate modes of I% per year
for each subsequent year until 40% of all commute trips are made by
alternate modes; or:
2. Alternatively, a reduction in average annual VMT per employee of 1.5%
per year can be selected by a major employer after a 25% alternate mode
or commuter trip VMT reduction usage is achieved."
35
5.2.2 Adopt-A-Roadway - (See Section 4.2.1)
5.2.3 Neighborhood Clean-Up - (See Section 4.2.2)
5.2.4 Household Hazardous Waste - (See Section 4.2.3)
5.2.5 Water C.A.S.A.- (See Section 4.2.5)
5.2.6 Recycling - (See Section 4.2.7)
5.2.7 Tree-cycle - (See Section 4.2.8)
5.2.8 Water Use Monitoring - (See Section 4.2.9)
5.2.9 Water Conservation Audits - (See Section 4.2.10)
5.2.10 Adopt-A-Trail - (See Section 4.2.11)
00"
5.3 Action Plan for Public Involvement and Participation
The Town of Marana's action plan for public involvement/participation is outlined OW,
below. The format is structured according to the guidelines provided by ADEQ.
5.3.1 Public Involvement and Participation Plan
VB.Zc.i Include in the SWMP a description of the generalplanfor informing
the public of involvement andparticipation opportunities.
The Town of Marana will implement a participation program that recognizes the
importance of diverse community representation and offer opportunities for public
participation. The overall goal of the Town of Marana's stormwater pollution prevention
program is to involve the public actively in the development, implementation, and
enforcement of the program. The Town will accomplish this goal through a variety of
activities. The following sections outline the details of these activities.
36
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The Town will implement all public involvement and participation activities according to
state and local public notice requirements. The State of Arizona requires that:
66notices of election, invitations for bids, notices of letting contracts, laws and ordinances,
and other notices of a public character issued by authority of the governing body of any
city or Town, shall be published as provided by section 39-204" (A.R.S. 9-812).
Section 39-204 of the A.R.S. requires that:
A. When publication of a notice in a newspaper is directed or authorized by law, it
shall be in a newspaper of general circulation printed in English.
B. If the number of times the notice is to be published is not specified, publication
shall be:
1. If in a weekly newspaper, once each week for two consecutive weeks.
2. If in a daily newspaper, four consecutive times.
C. If the place of publication of the notice is not specified, publication shall be:
3. If by a district, city or Town officer, board, or commission, or by any person
in a district, city or Town, in a newspaper printed and published within the
territorial limits thereof. If no such newspaper is printed and published within
the limits thereof, publication may be made in a newspaper printed and
published in the county in which the district, city or Town is located.
5.3.2 Public Involvement and Participation Activities
V. B. 2. c. H Include in the SWMP the types of activitiesfor public involvement that
the program will include and the target audiences.
5.3.2.1 Public Meeting/Notices
At least one public meeting will be held during the first permit year following ADEQ's
review of the draft SWMP document and receipt of comments from that agency, to allow
public review of, discussion, and input on the SWUR The Town will advertise planned
meetings through a press release submitted to local radio stations and newspapers and on
the stormwater website. During this first year, the Town will publish at least two public
37
notices to announce the SWMP development effort, solicit public input, and advertise the
Town of Marana's, SWMP contact information.
The public is the target audience for public meetings and notices. This effort will also
focus on reaching the Spanish-speaking community by providing Spanish versions of
informational materials at any public meetings.
5.3.2.2 Adopt-A-Wash
One key to effective public involvement programs is building a sense of ownership
towards a program within the community. The success of Adopt-A-Road and similar
efforts has shown that the community derives a sense of satisfaction from having a direct
role in the maintenance of their surroundings. The Town of Marana would like to
capitalize on this sense of community by allowing groups or businesses to adopt a wash.
Twelve washes have been designated for adoption in the current compliance area. The
Town will recognize the adopters by posting the adopting organization's name on the
Stormwater website. This program may require that sponsors adopt for at least one year
and agree to conduct four clean-ups annually.
5.3.2.3 Storm Drain Marking
Due to concerns for public safety, responsibility for this activity will be transferred to the
Town of Marana Operations and Maintenance Department. This activity will now fall
under the Illicit Discharge Detection and Elimination Section of the SWMP.
5.3.2.4 Volunteer Groups
[ -9
Many volunteer groups with an interest in environmental clean-up, water quality, or other
stormwater-related issues are already in existence. These groups include local am
environmental organizations, neighborhood associations, and youth/school groups.
Providing opportunities for these organizations to participate in, or raise awareness of
pollution prevention goals through effective stormwater management activities is an
38
1W
efficient way for an MS4 to promote the goals of the SWMP. The Town of Marana will
encourage local volunteer organizations to participate in any ongoing stormwater
management efforts. Staff will also be. available to conduct presentations on stormwater
management-related topics when requested.
5.3.2.5 Contact Person/Procedure
The designated contact person for the Stormwater management program is listed in
Appendix A, Table Seven: Responsible Individuals. The office phone number and web
address will be advertised in various locations and formats including all public outreach
and education materials, the SWMP website, and any SWMP-related correspondence
with businesses or members of the public. All correspondence or p hone calls received
related to the Stormwater Management Program will be entered in a database maintai ned
for the stormwater management program. Staff members will review and determine the
appropriate response and initiate appropriate actions to address the subject of the
messages.
Staff currently records any general concerns regarding storrnwater on a detailed
"Community Response Tracking Report" (Appendix B) or "Service Request" forms
(Appendix E). Staff members address citizen concerns, including possible zoning
violations, according to procedures and guidelines developed by the Planning and Zoning
Division (Appendix Q. Town personnel will record any calls regarding illicit discharges
or other stormwater management issues, and determine the appropriate response actions.
See Appendix A for responsible personnel.
5.3.2.6 Stormwater Website
A stormwater website will be developed and made accessible as a link through the Town
of Marana's website. This website will provide information regarding the stormwater
pollution prevention plan, ways people can help, activities they can take part in, and
contact information (phone, address, fax, and e-mail) where the public may express
concerns or comments regarding illegal dumping or other violations. Once the website is
39
Aw
completed, major educational institutions, environmental interests groups, and
governmental entities within the region will be contacted and asked to provide links on
their own websites to the Town of Marana's stormwater website.
5.3.2.7 Database
M?
To facilitate coordination and implementation of all six minimum control measures,
including public involvement/participation, the Town of Marana will develop and
implement a database. This database will track information such as public comments
regarding the stormwater management program, storm drains marked, washes adopted,
and volunteer groups with an interest in stormwater pollution prevention.
5.3.3 Review of Public Comments
V B. 2. c. iii Include in the SWMP a description of the procedurefor receiving
and reviewing public comments.
Staff receiving comments on the SWNT are listed in Appendix A and is subject to
change depending upon employment with the Town. Contact information will be
advertised in various locations and formats including public meetings, outreach and
education materials, the Stormwater website, and any stormwater-related correspondence
with businesses or members of the public. Staff members will record all comments
received in a database maintained for the stormwater management program. Staff will
review all comments and an appropriate response determined and initiated.
5.3.4 Access to the SWMP and NOI
VB.2.aiv Include in the SWMP an explanation of how interestedparties may
access the SWMP and NOI.
The Town will post the SVIW and NOI on the Town of Marana's stormwater website
for public review and comment when ADEQ grants final approval of the document after
40
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am
ADEQ's first review and comments are addressed. Interested parties may also come to
the Public Works Department to review the SWMP document.
5.3.5 Measurable Goals
VB.2.av Include in the SWMP a list of measurable goalsfor the public
involvement and participation program
The measurable goals for each public involvement/participation activity can be found in
Table Two: Public Involvement/Participation Measures and Milestones (found on
page 44).
The Town will provide the following information in the annual MS4 compliance report
as applicable:
1. Staff
a. Name and position of persons working on public
involvement/participation
2. Press Releases
a. Date of press release
b. List of media sources to which press release was sent
3. Public input
a. Date of notices for public meeting
b. Date of public meeting
c. Number of people attending public meeting
4. Storm drain marking
a. Number of drains marked
5. Adopt-A-Wash
a. Number of washes adopted
6. Volunteer UogRs
a. Number of organizations and groups contacted
b. Number of organizations and groups to which stormwater materials
were distributed
7. ReMonse to public comment
a. Number of public comments received
b. Response made for each type of comment received
41
8. Coordination
a. List of the dates, location, and topics covered for all stormwater-
related local or regional meetings attended by Town of Marana staff
9. SWMP/NOI availability
a. Date SWMP and NO] are posted on website
b. Number of requests for in-person review of the SWNT or NOI
0?
5.3.6 Implementation Schedule
VB.Zavi Include in the SWMP dates, in terms of months and years, by which
the permittee will achieve specific measurable goals.
The dates by which each measurable goal will be achieved are specified in Table Two: MW
Public Involvement and Participation Measures and Milestones (found on page 44).
5.3.7 Staff
V.B.2.c.vii include in the SWMP the name(s) and title(s) of the person(s)
responsible for implementing and coordinating the education
activities.
The public participation and involvement program will primarily be coordinated and
implemented by the Environmental Engineering Division. A list of the individuals
currently responsible for implementing and coordinating the public' involvement and
participation program is contained in Appendix A. This list is subject to change, and will
be updated as necessary. Additional staff members in the Town of Marana's Public
Works Department may provide administrative support. In the event that any of the
designated individuals is no longer available to work on the program, the Town will
determine and assign a replacement.
5.3.8 Public Involvement in SWMP Development.
V.B.2.c.viii Include in the SWMP how the public was involved in the development
of the SWMP submitted with the NOI
42
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5.3.8.1 Technical Advisory
The Town of Marana received substantial advisory assistance from other local Phase I
and Phase 11 MS4s during the development of the Marana SWW. Each MS4 conducted
its own public involvement efforts and the technical support provided to Marana by each
of these jurisdictions reflects the input they received from their respective constituents.
This assistance came as follows:
A. Attended meeting of Stormwater Management Education and Outreach hosted by
Maricopa County Flood Control; June 14, 2001
B. Attended meeting of Stormwater Management Working Group hosted by Pima
Association of Government; week of July 22, 200 1.
C. Attended meeting of Stormwater Management Working Group hosted by Pima
Association of Government; week of August 6, 200 1.
D. Attended meeting of Stormwater Management Working Group hosted by Pima
Association of Government; September 7, 200 1.
E. Attended meeting of Stormwater Management Permit hosted by City of Gilbert;
October 3, 2002
F. Hosted meeting with ADEQ and Oro Valley planner on SWMP development;
November 26, 2002
G. Attended meeting between Oro Valley and ADEQ on SMWP development;
December 3, 2002
H. Attended meeting of Stormwater Management Working Group hosted by Pima
Association of Government; December 19,2002
1. Attended meeting of Stormwater Management Working Group hosted by Pima
Association of Government; January 22, 2003
J. Attended meeting of Stormwater Management Working Group hosted by Pima
Association of Government; February 12, 2003
43
5.3.8.2 Focus Groups
Two focus group meetings were held with the local contracting and development
industries. These two groups were considered those with the greatest potential to be
significantly impacted by the Town of Marana's Stormwater Management Program.
Forty-two local developers and fifty-three local general contractors were contacted and
invited to attend focus group meetings hosted by the Town of Marana. on February 7,
am
2003 and February 14, 2003, respectively.
The focus group presentation provided information on the structure and requirements of
the AZPDES permitting program, and included discussion on both the construction and
the MS4 general permit. Changes to the permitting process, such as the future on-line
NOI submission form, were discussed. At both meetings, participants were asked to
comment on the Town of Marana Stormwater management program.
The only potential source of pollutants to Waters of the U.S. and the MS4 identified by
focus group participants was "incorrect procedures followed by local aggregate (sand and
gravel) truck operators".
5.4 Measurable Goals and Implementation
The BMPs for public participation and involvement and the measurable goals for their
implementation are outlined in Table Two below. This table includes the implementation
schedule and references to the relevant AZPDES requirements.
Table Two: Public Involvement/Participation Measures and Milestones
Reference BMP Measurable Goal Target Date
V.B.2.a 1. The Town a. Develop position requirements. a.Feb.2003
V.B.2.c of Marana
will hire a b. Create position; approval of Town b. June 2003
full-time Council is required.
staff perso
44
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0.
to coordinate c. Hire full-time staff person; this c. July 2003
and person can and probably will be the
implement same individual as described in the
the public BMPs for public education and
participation outreach.
and
involvement
program.
V.B.2.a 2. Staff will a. Submit at least two press releases a. Dec. 2005
V.B.2.b solicit public for publication in local media outlets.
V.B.2.c input on and
review of the b. Hold at least one public meeting in b.Feb.2006,
SWW. the first permit year. after ADEQ
addressed
comments
c. Announce public meeting in a press c.Feb.2006
release at least 30 days in advance of
meeting. d.Feb.2006,
ongoing
d. Notify the public of any other local
or regional stormwater-related
meetings.
V.B.2.a 3. Staff will a. Activity moved to Illicit Discharge
V.B.2.c develop a Detection and Elimination section due
Storm Drain to concerns for public safety.
Marking Operations and Maintenance will
program. complete storm drain marking as
needed.
V.B.2.a 4. Staff will a. Develop Adopt-A-Wash a. Jan. 2006
V.B.2.c develop an procedures and protocols.
Adopt-A-
Wash b. Identify all washes in the Town's b.Feb.2006
program. compliance area to be considered for
adoption.
c. Notify the public, volunteer c. Begin Mar.
organizations, and schools about the 2006; ongoing
program-
d. Implement program. d. Begin Mar.
2006; ongoing
V.B.2.a 5. Staff will a. Research the various volunteer a.Feb.2005
V.B.2.c encourage programs and organizations that focus
involvement on watershed, water quality,
45
of local stormwater, or other related issues.
volunteer
groups in b. Develop a comprehensive database b. Apr. 2005
stormwater of volunteer organizations and their
pollution contact information.
prevention
effort. c. Contact volunteer organizations c. Ongoing
and discuss how to incorporate
stormwater materials and activities
into existing volunteer opportunities.
These groups may include, but are not
limited to neighborhood associations,
schools, civic groups, and interest
groups-
d. Document existing volunteer d. Ongoing
opportunities and their potential for
integrating stormwater issues.
e. As resources allow, provide e. Ongoing
information to these groups when
requested regarding stormwater
management and effective stormwater
controls.
V.B.2.a 6. Staff will a. Research the various stormwater- a. Mar. 2003
V.B.2.c participate in related meetings held in Pima
local and County; Meetings include Pima
regional Associations of Government's
stormwater Stormwater Management Working
programs, Group.
workshops,
and advisory b. Designate staff person(s) to attend b. Mar. 2003
committees. these meetings, workshops, or
advisory committee meetings.
c. Have staff members in attendance c. Ongoing
at a minimum of 50% of these
meetings.
d. Record date, name, and topics d. Ongoing
covered for any meetings attended in
the SWMP database.
V.B.2.a 7. Staff will I a. Identify a principal contact person. , a. Mar. 2003
46
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A?'
am
?w?
am
aw
V.B.2.c develop a
procedure b. Create a procedure for effective b. Apr. 2003
for and timely response to public
responding inquiries, comments, or concerns
to public regarding stormwater pollution and to
comments reports of illegal waste disposal.
on the
SVAIP. c. Advertise contact information so c. Begin Nov.
that residents are aware of whom to 2003; ongoing
call or email.
d. The stormwater contact person will d. Begin Nov.
review information and comments 2003; ongoing
from the public and determine the
best response. Appropriate responses
may include providing information
over the phone, by email, or by postal
mail; referring the caller to another
Town employee for follow-up; or
forwarding the information provided
to the appropriate department.
e. Review the public information e. Periodic, as
contact process and revise as needed
necessary to respond to community
needs.
V.B.2.a 8. Staff will a. Post SWMT and NOI on Town of a. Nov. 2005,
V.B.2.c make Marana stormwater program website. after ADEQ
SVRvIP and comments
NOI b. Advertise the website in Marana addressed
available to water bills, brochures, and any other b..Ongoing
the public educational and presentation
and other materials; notify any MS4s receiving
MS4s discharges from the Town of Marana.
including
tribal
authorities.
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6 ILLICIT DISCHARGE DETECTION AND
ELIMINATION
Illicit discharges are any wastes or wastewater that enter a storm drain or storm sewer
system and are not composed entirely of stormwater. Such discharges are illicit because
municipal storm sewer systems are not designed to accept, process, or discharge such
wastes. Sources of illicit discharges can include: sanitary wastewater illegally connected
to the storm drain system; effluent from septic tanks; car washing; pool draining or back
flushing; industrial wastewater; improper disposal of auto and household toxics, such as
used motor oil and pesticides; and oil or chemical spills on roadways. (EPA Stormwater
Phase II Compliance Assistance Guide, 2-3) Untreated non-stormwater discharges to the
storm sewer system can contribute to polluted waterways and groundwater. Illicit
discharges can occur during dry weather when there is little or no storm runoff, or during
wet weather. Illicit discharges are more easily detected when there is little or no
stormwater runoff. Therefore, the Town of Marana's illicit discharge detection and
elimination program will consist of dry weather monitoring. Staff will develop a
stormwater ordinance incorporating the requirements for complying with the 15 day
timeframe given to investigate illicit discharges.
6.1 AZPDES Requirements and Guidelines
The Minimum Control Measure for illicit discharge detection and elimination requires
regulated small MS4s to:
49
AZPDES requirement V.B.3.g
VB.3.a Develop, implement, and enforce a program to detect and eliminate illicit
discharges to the small MS4, except those discharges listed below:
L Non-stormwater discharges as listed in Part 1, Section C 2; This
exception does not apply to those categories of discharge which the
permittee or applicant has determined to be a significant contributor of
pollutants to the small MS4; or
ii. Occasional incidental non-stormwater discharges (e.g. non-commercial
or charity car washes, etc) that the permittee does not expect (based on
information available to the permittee) to be a significant contributor of
pollutants to the small MS4 because ofeither the nature of the discharges or
conditions the permittee has establishedfor allowing these discharges to the
small MS4 (e.g. a charity car wash with appropriate controls onfrequency,
proximity to sensitive water bodies, BMPs on the wash water, etc).
V.B.3.b Develop, if not already completed, a storm sewer system map, showing the
location of all ouffialls and the names and locations of all waters of the
United States that receive dischargesfrom those.
V.B.3.c To the extent allowable under State, Tribal, or local law, effectively prohibit
through ordinance or other regulatory mechanism, non-stormwater
discharges into the storm sewer system and implement appropriate
enforcement procedures and actions.
V.B.3.d Develop and implement a plan to detect, identify the source of, and address
non-stormwater discharges, including illegal dumping, to the system.
V.B.3.e Inform public employees, businesses, and the generalpublic of hazards
associated with illegal discharges and improper disposal ofwaste.
V.B.3.f Conduct dry weatherfield screeningfor non-stormwaterflows. The screening must
include qualitative field tests based on color, odor, or visually observed
characteristics as indicators ofdischarge sources. If the qualitativefield tests do not
provide enough information for the permittee to determine the source of the
discharge, the permittee must test the discharge, while in thefield, for selected
chemical parameters. The permittee must investigate the illicit discharge within 15
days of its detection, and mustfollow up investigation with an action to further study
the source of the discharge and ultimately eliminate the discharge.
50
LLij
AZPDES regulations further require that a permittee's SWMP include the following
information:
AZPDES requirement VB.3.g
L A description of detection methods;
iL A description or citation of the established ordinance or other regulatory
mechanism used to prohibit illicit discharges. If the permittee needs to develop
this mechanism, describe the plan and schedule to do so;
iii. A description of enforcement policy andjurisdiction;
iv. A description of the non-stormwater discharges allowed in the MS4 pursuant
to Part V, Section B. 3. a. i,
V. A description of the non-stormwater discharges allowed in the MS4 pursuant
to Part V, Section B.3.a.ii,-
vi. The methodsfor informing1training employees about illicit discharges;
viL The methods for informing the public of hazards associated with illegal
discharges and improper disposal of waste;
viii. A list of measurable goalsfor the illicit detection and elimination program;
ix. Dates, in terms of months and years, by which the permittee will achieve
specific measurable goals; and
X. The name(s) and title(s) of the person(s) responsible for implementing and
coordinating illicit discharge detection and elimination activities.
6.2 Efforts to Date
6.2.1 Signage
The Town of Marana has an ordinance requiring vehicles to cover all loads with a tarp
and has signs posted throughout the Town limits noting the requirement. As of 2003,
sixteen signs are posted along routes with heavy commercial traffic and near Town limits.
The Town of Marana also has a series of "No illegal dumping" signs posted throughout
the Town boundaries. These signs request observers to report illegal dumping by calling a
specified phone number. This number puts individuals in contact with a Pima County
staff person who then forwards any reports of dumping within the Town of Marana limits
to the appropriate Town employee within the Planning and Zoning and Police
Departments.
51
6.2.2 Spill/Discharge Cleanup
When spills, dumping, or other discharges are reported to the Town of Marana, the
appropriate staff member is notified, depending on the circumstances and suspected
materials. A truck equipped with barricades and cones, spill packs, cleaner, safety vests,
fire extinguisher, Floor Dry, and containinent barrels may be dispatched to the site for
cleanup of the spill. A trained Municipal Operations staff member assesses the site and
determines the severity of the spill or discharge. The trained Municipal Operations staff
member will clean small, non-hazardous spills and dispose of waste material at the
landfill. Individuals presently associated with this activity are listed in the Responsible
Individuals table in Appendix A.
For large or hazardous spills, the initial responder will contact the Town of Marana
Operations and Maintenance Department and the local fire department. The fire
department staff shall have all the necessary hazardous materials and spill disposal
training and certifications, and will clean the site and properly dispose of the waste
materials. The cleanup operation shall be conducted in compliance with Northwest Fire
Department guidelines.
6.2.3 Marana Town Code
Marana's Town Code includes regulations that pertain to illicit discharge prevention. The
relevant sections of Code are as follows:
Title 7: Building
Sewage disposal (Section 7-5-1)
"Septic tank systems shall be constructed in accordance with the standards of the Arizona
Department of health services and the Pima County health department, with compliance
with those standards to be certified by the appropriate state or county agency or the Town
engineer."
Title 10: Health and Sanitation
Dumping and Transportation of Garbage or Aggregate Material
52
MW
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,(Section 10-1-2)
A. "It shall be illegal to transport garbage, refuse, and aggregate material or like material
within the Town limits in an open vehicle unless the material is in a closed container
or in an enclosed cargo area."
C. "No vehicle shall be driven or moved on any roadway within the Town limits unless
the vehicle is so constructed or'loaded as to prevent any of its load from dropping,
shifting, leaking, or otherwise escaping therefrom, except that sand may be dropped
for the purpose of securing traction, or water or other substances may be sprinkled on
a roadway in cleaning or maintaining the roadway."
Illegal dumping (Section 10-1-3)
A. "A Person who dumps, deposits, places, throws or leaves refuse, rubbish, debris, filthy
or odiferous objects, substances, or other trash on any Town road, public
thoroughfare, public airport, the right-of-way to a Town road, public thoroughfare or
public airport within twenty (20) yards of a Town road, public thoroughfare or public
airport is guilty of a class three (3) misdemeanor."
B. "The governing body of the Town shall cause signs to be erected at suitable intervals
on roadways, public thoroughfares, public airports, and rights-of-way within the
Town limits, including public parks, informing the public that is unlawful to commit
the acts prohibited by this section."
F. "The Town manager shall enforce the provisions of section 10-1-3 by prosecuting
violators in the Marana Municipal Court pursuant to the provisions of the code. If
such prosecution fails to secure compliance with the provisions of those sections, or if
the Town is unable to prosecute violators by reason of failure to secure jurisdiction
over their persons, the manager shall compel the removal of litter by the procedure
outlined in chapter 10-2 of the Town code."
Litter on private premises or public place (Section 10-2-2)
"No person shall dump, throw or deposit litter on any public place or private premises
within the Town, whether owned by the person or not, except that the owner or person in
control of private premises may maintain authorized private receptacles for refuse so that
litter will be prevented from being carried or deposited by the elements upon any public
place. Any person violating the provisions of this section shall be liable for any costs
assessed for removal of the litter."
Owner to maintain premises (Section 10-2-3)
"The owner or person in control of any private premises shall at all times maintain the
premises free of litter, provided that this section shall not prohibit the storage of refuse in
suitable containers."
53
Notice to remove (Section 10-2-5)
"To compel the removal of litter through the provisions of this chapter, if a person
owning or controlling any private premises fails, neglects or refuses to remove or
properly dispose of litter located on private premises owned on controlled by that person,
he or she shall be given written notice by the manager to remove all litter from those
private premises within thirty days from the date set on the notice for compliance..."
Removal by Town (Section 10-2-8)
"When any person to whom a notice to remove has been given, and on or before the date
of compliance on the notice or within such further time as may have been granted by the
council on appeal, fails, neglects or refuses to move from the private premises any or all
litter, the manager is authorized and directed to cause same to be removed and disposed
of at the expense of the owner or person controlling the private premises..."
Sewage Sludge - Residential areas (Section 10-3-1)
"The use of land within the Town that is within one-quarter mile of a human residence
that is also within the Town for the application of or injection of sewage sludge to the
surface or within eight inches of the surface shall be prohibited, except where the
residence is owned by the owner of the land where sludge is to be applied or injected or
where a written waiver has been obtained from the resident or owner of the residence and
where the waiver has been filed with the Town clerk."
Sewage Sludge - Floodplain areas (Section 10-3-2)
"The use of land within the designated flood plain of the Santa Cruz River as defined by
the Town zoning ordinance or development code for the application of or injection of
sewage sludge within eight inches of the surface shall be prohibited."
Sewage Sludge - Other areas (Section 10-3-3)
"The use of any other land within the Town for the application of or injection of sewage
sludge to the surface or within eight inches of the surface shall be in accordance with
standards and regulations of the United States Environmental Protection Agency, the
Arizona Department of Health Services and the Pima County Health Department..."
Travel Reduction Code - Purpose (Section 10-4-1)
"The purpose of this chapter, recognizing that motor vehicles are the single greatest
contributor to air pollution, is to improve air quality and reduce traffic congestion within
the incorporated and unincorporated areas of Pima County by increasing alternate mode
usage and reducing overall motor vehicle travel for commute trips This chapter shall
establish a basis for cooperative effort of the local jurisdictions to achieve a uniform
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program for reduction of work related trips by employees working for major employers
subject to this regulation."
Requirementsfor employers (Section 10-4-5)
"In each year of the regional program each major employer shall:
A. Provide each regular employee with information on alternate mode options and
travel reduction measures including, but not limited to: Sun Tran bus routes and
schedules, the Rideshare program, and bicycle routes. This information will
also be provided to new employees at the time of hiring..."
Title 14: Water
Service lines, valves and meter (Section 14-3-6)
"...The customer's lines or piping must be installed in a way that prevents cross-
connection or backflow."
Escaping water (Section 14-10-3)
"No person shall allow water to escape from his or her premises upon public property,
such as alleys, roads or streets, nor upon any other person's property."
6.2.4 1996 Spa/Pool Code
The Pima County 1996 Spa/Pool Code was adopted by the Town of Marana, with
amendment. Discharges from pools and spas are regulating under this code according to
the following provisions:
Waste Water Disposal (Sections 314, 415, 508, 616, 714, and 815)
"Backwash water shall be disposed of and contained on site. All discharges of backwash
water shall comply with applicable Pima County ordinances and Arizona Department of
Environmental Quality (ADEQ) Engineering bulletins..."
6.2.5 Town of Marana Land Development Code
The Town of Marana's Land Development Code regulates a wide range of actions that
would result in illicit discharges into the storm drainage system or would otherwise
negatively impact surface waters. The Town of Matana is anticipating a rewrite of the
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Land Development Code beginning in 2006. The relevant sections of the current Code
are as follows:
Title 5: Zoning
Zone D - Designated Flood Plain Zone (Reference 05.02.04)
A. "Permitted uses within Zone D no residential land use shall be permitted, nor shall
any commercial, industrial, or quasi-public use be permitted that entails the
accommodation of persons overnight or the storage of materials or equipment for
more than 24 hours if such materials or equipment would become hazardous to
human health and safety upon exposure to water, or if such materials or
equipment would result in a hazardous contamination of the Santa Cruz River or
Brawley Wash..."
D. "Approval Required. No construction or excavation that will alter the natural
drainage pattern, direction or rate of flow, or the carrying capacity of the Santa
Cruz River or the Brawley Wash can be performed unless previously approved by
the Town Council after recommendation from the Planning Commission."
Drainage of Surface Waters (Reference 05.05.04)
"No surface water shall be allowed to drain from any lot onto any adjacent lot except
upon written agreement between the owners of said lots"
Pollution Prohibited (Reference 05.05.05)
"...no land use shall be permitted which emits or discharges gases, fumes, or other
pollutants into the atmosphere in amounts which result in pollutants entering any water or
drainage system in amounts exceeding the standards prescribed by those Pima County;
Arizona (sic), or federal agencies having appropriate jurisdiction."
Recreational Vehicle (Reference 05. 10. 10)
H.1 1. "All parks and subdivisions shall have refuse collection areas approved by the
Planning Administrator..."
Resort and Recreation Zone (Reference 05.11.07)
N. "Each property shall provide adequate and accessible trash disposal areas..." am
Light Industrial (Reference 05.12.02)
1.7 "...all outdoor trash and refuse storage areas shall be enclosed..."
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Heavy Industry (Reference 05.12.03)
H.8 "...all outdoor trash and refuse storage areas ... shall be enclosed..."
Title 8: Building Code
Drainage of Lots (Reference 08.03.03)
"Surface water shall not be allowed to drain from any lot onto any adjacent lot, parcel, or
easement except upon written agreement with the owner of said adjacent lot, parcel, or
easement."
Waste Disposal (Reference 08.03.09)
"Sewerage systems and/or septic tanks shall be constructed in accordance with the
standards of the Arizona Department of Health Services and the Pima County Health
Department..."
Title 11: Prohibition of Illegal and Nuisance Uses
"The purpose of this section is to promote the health, safety, economic, aesthetic, and
general welfare of the citizens of the Town of Marana ... by establishing requirements for
the maintenance of all land..."
Nuisances Prohibited (Reference 11. 02)
B. "Composting Prohibited: No person shall compost or permit the composting of
organic waste; manure; tree, grass, or shrub clippings; grease; bio-solids, or other
similar material on any property within the Town of Marana limits except for
composted material that is utilized directly on the property from which it is
composted."
D. "Grease Ponds Prohibited. - No person shall allow a grease pond or open grease
storage facility to be maintained on any property within the Town of Marana limits."
Title 17: Environmental Resource Preservation, Native Plant Protection,
Landscgpe Reguirements
Protected Ridges, Protected Peaks, Riparian Areas, Wildlife Corridors and Areas of
Significant Vegetation (Reference 17.01.01)
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D. "All areas determined to include riparian or wildlife linkages and corridors shall be
protected and remain undisturbed throughout the course of development and shall be
fenced-off during construction."
Landscape Requirements: Intent and Objectives (Reference 17.03.02)
A. "This Title will utilize landscaping to achieve the following goals and objectives:
1. helping control and utilize stormwater runoff..
2. control soil erosion..."
Title 21: Flood Plain and Erosion Hazard Management Code
Methods ofReducing Flood Losses (Reference 21.01.04)
"To accomplish its purposes, this Title includes methods and provisions for:
A. Restricting or prohibiting uses which are dangerous to health, safety and property
due to water or erosion hazards, or which result in damaging increases in erosion
or in flood heights or velocities;
E. Controlling the alteration of natural floodplains, stream channels and natural
'protective barriers, which help accommodate or channel flood waters;
F. Controlling filling, grading, dredging and other development which may increase
flood damage; and..."
Establishment of Floodplain Use Permit (Reference 21.04.02)
C. "Permit applications shall be reviewed to determine whether the proposed site
alterations and improvements will be reasonably safe from flooding and lateral
erosion and will not otherwise aggravate existing conditions. If a proposed
development is found to be in the path of flooding, lateral erosion or would
aggravate existing conditions, improvements shall be relocated or adequate
protective measures shall be taken to avoid aggravating the existing conditions.
F. No permit shall be issued for any development which is not in conformance with
this Title or any other provision of law relating to such development. A
floodplain use permit may be denied if the proposed development constitutes a
danger or hazard to life or property. In making such a determination, the
Floodplain Administrator may consider the following factors, which are not all-
inclusive:
b. The danger that materials may be swept onto other lands or downstream
to the injury of others;
i. The expected heights, velocity, duration, rate of rise, and sediment
transport of the flood waters expected at the site under both existing and
proposed conditions."
Standards of Construction in Floodprone Areas (Reference 21.05. 01)
B. 2 "All new construction and substantial improvements shall be constructed
using methods and practices that minimize flood damage."
Standardsfor Storage of Materials and Equipment (Reference 21.05.02)
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A. "The storage or processing of materials that are, in time of flooding, buoyant,
flammable, explosive or could be injurious to human, animal or plant life is
prohibited.
B. Storage of other material or equipment may be allowed if not subject to major
damage by floods and if firmly anchored to prevent flotation, or if readily
removable from the area within the time available after flood warning."
Standardsfor Utilities (Reference 21.05.03)
B. "On-site waste disposal systems shall not be located in a floodplain or erosion
hazard setback area if a more suitable area exists on the parcel."
Standardsfor Excavations, including Sand and Gravel Operations (Reference 21.05.08)
A. "Extraction of sand, gravel and other materials is allowed provided that
excavations are not so located or of such depth, or width, or length or combination
of depth-width-length as to present a hazard to structures (including but not
limited to roads, bridges, culverts, and utilities), to the banks of watercourses, to
other property, or which adversely affects groundwater recharge.
B. No stockpiling is permitted within special flood hazard areas of materials or
tailings that may obstruct, divert, or retard the flow of floodwaters except as
reviewed and accepted by the Floodplain Administrator on an individual
floodplain use permit basis."
Detention and Retention Requirements (Reference 21.05. 11)
C. "Structural flood control measures may be proposed in conjunction with, or in
place of detention/retention systems if it can be clearly demonstrated that such
measures will not alter the water and sediment equilibrium of the affected
watercourse, and will mitigate environmental impacts.
D. Localized areas lacking sufficient improved or natural receiving waters into which
runoff may be discharged may be required to follow alternative drainage solutions
including complete retention practices as directed by the Town Engineer."
Copies of the floodplain use permit and elevation certificate are contained in Appendix D
of the SWMP.
6.3 Action Plan for Illicit Discharge Detection and Elimination
The Town of Marana's action plan for illicit discharge detection and elimination follows
the current AZPDES guidelines.
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6.3.1 Detection Methods
VB.3.g.i Include in the SWMP a description of detection methods.
Illicit discharges into the municipal separate storm sewer system will be detected through
a combination of visual field inspections and public reporting.
6.3.1.1 Field Inspections
All known outfalls that discharge to surface waters will be visually inspected during the
dry season. Field inspections will consist of visits to outfall locations using the storm
sewer system map and documentation of visual observations on an "Illicit Discharge
Detection Inspection Form", which may be, in electronic form. Detailed procedures for
qualitative field inspection activities will be developed during the permit period and will
include inspections for and a description of odor, color, turbidity, floatable matter,
deposits, stains, vegetation, and damage to outfall structures.
Dry weather outfall inspection procedures developed as a part of this SWMP (part of the
Town's phase-in to the program) are contained in Appendix B and will be updated and
revised as necessary. Dry weather inspections will supplement the inspections carried out
by zoning inspectors in response to citizen requests.
6.3.1.2 Public Reporting
The observations of community members are often an important source of information
regarding illicit discharges. As outlined in the previous section on public
involvement/participation, the Town will develop and implement a procedure for the
public to report suspect discharges. The Town of Marana will also encourage local
community groups to conduct volunteer monitoring. Reported discharges will be subject
to the same or similar procedures as the regular visual field inspections.
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6.3.2 Regulatory Mechanisms
V.B.3.g.ii Include in the SWMP a description or citation of the established
ordinance or other regulatory mechanism used to prohibit illicit
discharges. If the permittee needs to develop this mechanism, describe
the plan and schedule to do so.
An illicit discharge ordinance should include, at a minimum, the following key elements:
L Prohibitions on illegal dumping or discharges into the storm drainage system
2. Prohibitions on illicit connections from sanitary sewers to the storm drainage
system
3. Authority to inspect properties for illicit discharges
4. Penalties and enforcement options
The Town of Marana's Land Development Code and various Pima County Codes
currently regulate non-stormwater discharges. Relevant portions of the Codes will be
cited under each of the four key elements required for an illicit discharge ordinance..
6.3.2.1 Illicit Dumping or Discharges
The Town of Marana's overall commitment to prevention of surface water pollution can
be seen in a number of sections of the Town Code and Land Development Code.
A. Town Code
i. Chapter 10-1 of the Marana Town Code reduced the likelihood that
pollutants will be transported into local waterways by requiring those
transporters of garbage and aggregate material cover their loads and
otherwise prevent spillage of these materials.
ii. Sections 10-1-3 and 10-2-2 require that no individual dumps or otherwise
leaves refuse on any private or public property without proper permit or
authority.
iii. Section 10-2-3 requires that property owners keep their property free of
debris, garbage, or other material.
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iv. Marana Pool and Spa Code, as adopted from 1996 Pima County Pool/Spa
Code, (Sections 314, 415, 508, 616, 714, and 815) requires that property
owners not allow water to escape from the premises onto public or private
property, and that pool and spa owners not discharge of water in a manner
that it leaves the site.
v. Section 7-5-2 requires that all buildings have proper waste disposal systems
vi. Sections 104-1 and 104-5 promote travel reduction by local employers
vii. Cur-rent policy for customer response establishes an expedient tirneframe
for investigating issues and following up with customers. Forms will be
updated to establish all responses to stormwater reports received regarding
possible illicit discharges be investigated and responded to within 15 days.
B. Land Development Code: The area surrounding the major washes and subject to
flooding is zoned as a "Designated Flood Plain Zone" and the use of these areas is
rigorously controlled (see References 05.02.04, 21.01.03, and 21.05). Movement
of surface runoff is highly regulated (see Reference 05.05.04), actions which
contribute pollutants to surface waters and ground water are expressly prohibited
(see Reference 05.05.05), trash and refuse must be adequately contained (see
References 05.10.10, 05.11.07, 05.12.02, 05.12.03), and riparian areas and native
vegetation are protected and proper landscaping is required (see Sections
17.01.01, 17.01.02, and 17.01.03).
6.3.2.2 Illicit Sewer Connections
The Town of Marana does not operate a sewer system or wastewater treatment plants. All
sewer systems within the Town boundaries are under the control of Pima County
Wastewater Department (PCWW). When reviewing grading and development plans, the
Town requires that permit applicants submit proof that proposed sewer connections and
installation methods have been approved by PCWW.
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6.3.2.3 Inspection Authority
Determining the source of an illicit discharge sometimes requires inspection of private
property deduced as a likely source of the discharge. Currently, the Town of Marana
employs informal surveillance to identify properties that are in violation of the Town
Code prohibiting un-contained trash and debris on the property. A Zoning officer
responds to reports from residents and conducts casual inspections. These inspections
may cover a wide variety of issues including a report of trash or debris, non-farictioning
vehicles, and excess number of animals on private property. This inspection directly
benefits the Town's Stormwater Management Program by minimizing the amount of
trash and debris uncontained or improperly stored in areas where it can be transported
into local waterways.
If a zoning officer finds a violation on a specific property, the zoning officer will first try
to call the property owner and notify them of the problem. If the phone call does not
result in action to resolve the issue, a series of letters will be sent to the resident or
business owner until corrective action is taken. If, after the third letter, a problem still
exists, the Town will take legal action against the property owner in the form of fines
and/or criminal charges. An outline of the draft "Code Enforcement Process for Citizen
Concern Report" and copies of notification letters are provided in Appendix C.
The Town of Marana will follow these existing procedures for illicit discharge detection
and elimination unless they prove to be inadequate, at which point additional inspection
authority will be developed and implemented through ordinance.
6.3.2.4 Enforcement
The enforcement policy for violations of an illicit discharge Code will be discussed in the
following section.
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6.3.3 Enforcement Policy
VB.3.g.iii Include in the SWMP a description of enforcement policy and
jurisdiction.
Currently, violation of any provision of the Land Development Code and the Town Code
constitutes a Class I misdemeanor. Non-compliance is subject to the issuance of a stop-
work order and/or fines.
Beyond enforcement policies for existing Town of Marana ordinances, staff will consider
developing a plan for additional enforcement actions. Any new enforcement policy, if
deemed necessary, may include verbal or written warnings, administrative actions, fines,
cost recovery, and/or legal action.
6.3.4 Allowable Non-stormwater Discharges per Part V, Section B.3.a.i
VB.3.g.iv Include in the SWMP a description of the non-stormwater
discharges allowed in the MS4 pursuant to Part V, Section R 3. a. L
In Part I, Section C.2., ADEQ lists the following allowable non-stormwater discharges:
A. Water Line Flushing
B. Diverted Stream Flows
C. Rising Ground Waters
D. Uncontaminated Pumped Groundwater
E. Uncontaminated Groundwater Infiltration (as defined in 40 CFR 35.2005(20))
F. Discharges from Potable Water Sources
G. Foundation Drains
H. Air Conditioning Condensation
I. Springs
J. Water from Crawl Space Pumps
K. Footing Drains
L. Lawn Watering
M. Individual Residential Car Washing
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N. Flows from Riparian Habitats and Wetlands
0. Dechlorinated Swimming Pool Discharges
P. Street Wash Water
Q. Discharges from Emergency Fire Fighting Activities
The Town of Marana believes that these discharges are not impairing surface water
quality. This belief is based on knowledge of the Town's watercourses and discussions
with local community leaders, businesses, and the public. The only exceptions to this
would be if-
A. A discharge is identified in a Total Maximum Daily Load (TMDL) as
contributing pollutants to an impaired waterway; or
B. The Town of Marana, in the future, identifies a discharge as impairing a waterway
through the contribution of pollutants.
Under either of these circumstances, the Town may consider one or more of these
"allowable illicit discharges" to be significant contributors of pollutants to a waterway
and the Town will appropriately address the problem.
63.5 Allowable Non-stormwater Discharges per Part V, Section B.3.a.ii
VB.3.g.v Include in the SWMP a description of the non-stormwater discharges
allowed in the MS4 pursuant to Part V, Section B. 3. a. ii.
Occasional incidental non-stormwater discharges are allowable as long as the permittee
feels that they would not be significant contributors of pollutants to the small MS4. These
occasional discharges are most commonly associated with non-commercial or charity car
washes.
The Town of Marana does not perceive the above type of discharges to local waterways
to be significant contributors of pollutants due to the frequency or nature of these
discharges. This presumption is based on knowledge of the Town's waterways and
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discussions with local community leaders, businesses, and the public. The only
exceptions to this would be if-
A. A discharge is identified in a Total Maximum Daily Load (TMDL) as
contributing pollutants to an impaired waterway; or
B. The Town of Marana, in the future, identifies a discharge as impairing a waterway
through the contribution of pollutants.
Under either of these circumstances, the Town may consider an occasional incidental
non-stormwater discharge to be a significant contributor of pollutants to a waterway and
the Town would appropriately address the problem.
6.3.6 Employee Train' g
V.B.3.g.vi Include in the SWMP methods for informing1training employees
about illicit discharges.
All employees of the Town of Marana will receive information regarding the importance
of identifying and eliminating illicit discharges. Stormwater program staff will present
the information in a flyer or brochure included once a year in employee paychecks.
Employees whose job responsibilities are directly associated with detection and
elimination of illicit discharges will receive appropriate training through their respective
departments. This training may be coordinated with existing training programs. During
the permit period, staff will review the existing training programs and determine whether
additional training is necessary to address illicit discharges. If additional training is
required, staff will develop or update procedures and materials within the permit period.
6.3.7 Public Education
V.B.3.g.vii Include in the SWMP methods for informing the public of hazards
associated with illegal discharges and improper disposal of waste.
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Brochures described in the section on public education and outreach (Section 4.3.1.1)
will include information about the hazards associated with illegal discharges and
improper disposal of waste. The Town will also post this information on the Town's
stormwater website and may include it in other educational and presentation materials.
6.3.8 Measurable Goals
V.B.3.g.viii Include in the SWMP a list of measurable goals for the illicit
detection and elimination program.
The measurable goals for each illicit discharge detection and elimination activity can be
found in Table Three: Illicit Discharge Detection and Elimination Measures and
Milestones (found on page 69).
The following information will be provided in the annual compliance report:
1. Storm sewer system aap
a. Date map developed
b. Date and description of any modifications to the map
2. Ordinance
a. Date and description of ordinances passed for the purpose of meeting the
illicit discharge detection and elimination control measure
3. Illicit discharge detection and elimination
a. Number of outfall inspections performed during fiscal year
b. Number of illicit discharge reports received from the public or inspectors
c. Number and type of enforcement action(s) taken on illicit discharge
detection case
6.3.9 Implementation Schedule
V.B.3.g.ix Include in the SWMP dates by which the permittee will achieve
specific measurable goals.
The dates by which each measurable goal will be achieved are specified in Table Three:
Illicit Discharge Detection and Elimination Measures and Milestones (found on page
69).
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63.10 Staff
V.B.3.g.x Include in the SWMP the name(s) and title(s) of the person(s)
responsible for implementing and coordinating illicit discharge
detection and elimination activities.
Staff in the Geographic Information Systems (GIS), Information Technology (IT), and
Environmental Division will update and revise the storrn sewer system map. If the Town
determines that it does not have sufficient staff resources to update this map, this and any
other steps in this BMP may be contracted out to a consulting firm.
Town personnel will draft any necessary ordinances or revisions to ordinances, with final
review and approval by the Town Manager, Assistant Town Manager, and Town
Council.
Staff members will develop inspection procedures, databases, and forms.
Town of Marana staff or trained volunteers will perform dry weather inspections.
Staff coordinates and implements public and employee education. A staff member will
receive and record public inquiries or citizen reports regarding urban runoff discharges.
In the event that any individual listed in the Responsible Individuals Table (Appendix A)
is no longer available to work on the project, the Town will designate a replacement.
6.4 Measurable Goals and Implementation
The BMPs, and measurable goals by which they will be implemented, are outlined in the
following Table. Also included is the implementation schedule and references to the
relevant ADEQ requirements.
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Table Three: Illicit Discharge Detection and Elimination Measures and Milestones
Reference BMP Measurable Goal Target Date
-V-.B.3.a 1. Staff will a. Review existing citizen concern a. Oct. 2003
V.B.3.d develop a reporting procedure.
V.B.3.g procedure for
receiving, b. Draft new procedure including b. Nov.
addressing, contact person and phone number, 2003
and recording reporting forms, and protocols for
illicit addressing citizen concern reports.
discharge
reports. c. Customer inquiries or reports c. Oct. 2003
regarding possible illicit discharges will
be recorded and investigated within 48
business hours. The Town will provide
copies of reports upon request by
ADEQ.
d. Inventory existing "No Dumping" d. Beg. Oct.
and "Report Illegal Dumping" signs. 2003,
ongoing
e. Replace existing signs as needed. e. Ongoing
f. Add new signs in response to citizen f. Ongoing
reports.
V.B.3.b 2. Staff will a. Collect all existing information about a. Dec.
V.B.3.g create a storm the storm drainage system and outfalls; 2003,
sewer system contact as necessary Pima County, the update
map that will City of Tucson, the U.S. Geologic periodically
show all Service and other jurisdictions.
outfalls and
the names and b. Determine map specifications b. Jan. 2004
locations of including scale, the types of information
all waters of to include, and format.
the United
States that c. Map known outfalls and receiving c. Apr. 2004
receive water locations. This map will be
discharges created in ERSI compatible format, such
from those as ArcView Shapefiles, ArcInfo
outfalls. coverage, or ArcGIS geodatabase.
d. Verify outfalls and survey for d. May
possible missed locations through visual 2005,
inspection. This step will be combined ongoing
with the field inspections required in
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V.13.3.d.
V.B.3.c 3. Staff will a. Identify whether current Town Code a. Dec. 2006
V.B.3.g develop, if adequately addresses illicit discharge
necessary, an detection and elimination.
ordinance or
other b. Outline any necessary additions to b.Feb.2007
regulatory existing Town Code if applicable.
mechanism to
effectively c. Draft new Code provisions. c. July 2007
prohibit non-
stormwater d. Submit draft Code for legal and d. Sept.
discharges technical review. 2007
into the storm
sewer system. e. Submit Code for approval by Town e. Oct. 2007
Council.
f. Once new provisions are approved, f Nov.
begin implementing. Ordinance 2007,
approval and implementation will be ongoing
done in accordance with the public
notice requirements of the State of
Arizona (A.R.S. 39.204 and 9.812).
V.B.3.d 4. Staff will a. Identify priority areas for a. Sept.
V.B.3.f develop and investigation. The primary priority for 2004
V.B.3.g implement a inspection will be storm sewer outfalls
program to and may include areas with greater
detect and potential for contributing hazardous
eliminate materials or large quantities of
illicit pollutants, areas in close proximity to
discharges. waterways, and areas with high numbers
of past illicit discharge incidents.
b. Develop a plan for inspecting outfalls. b. Sept.
This plan will guide the scheduling of 2005
inspection activities and appropriate
procedures of assessment. The Town
will include the number of outfalls
inspected annually toADEQ with the
annual MS4 report form.
c. Develop a procedure for determining c. Oct 2004
whether or not a discharge is illicit,
whether or not it is contaminated, and
whether or not it is allowable under the
Town of Marana's permit.
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d. Develop procedures to trace an illicit d. Oct. 2004
discharge. This procedure may involve
visual inspection of the surface area,
visual inspections of the storm drain
systems, and/or more detailed
assessment methods.
e. Develop procedures to eliminate an
illicit discharge. This procedure will e. Oct. 2007
consist of the following elements:
notification of appropriate authorities,
notification of and consultation with
property owner regarding the discharge,
necessary corrective action(s), and a
timefi-ame (less than 15 day) for
eliminating the discharge; and escalating
enforcement and legal action, if
necessary.
V.B.3.e 4. Staff will a. Develop brochures, including A a. Dec. 2004
V.B.3.g develop and Spanish translation of the household
distribute brochure.
information to b.Feb.2005
employees, b. Identify contact information for each
businesses, target group including the organizations
and the and associations that regularly distribute
general public information to specific target groups.
regarding c.Feb.2005
hazardous c. Identify potential partner
associated organizations that can assist in the
illicit distribution of brochures and other
discharges. materials.
d. Mar.
d. Distribute brochures to residents and 2005,
target businesses falling within the periodic
Town's compliance area. At the end of
the five-year permit period, the Town of
Marana expects to reach: 100% of all
households covered by homeowner's
associations, 100% of Town employees,
75% of the construction/ development
community, 75% of auto service
facilities, 100% of sand and
gravel/aggregate operations, 75% of
hotels/motels, and 75% of restaurants.
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7 CONSTRUCTION SITE STORMWATER RUNOFF
CONTROL
Construction sites are likely to cause significant surface water quality impacts when
sediment and erosion controls are lacking or inadequate. These negative effects are
associated with both the sediment washed into watercourse and the pollutants bound to
those soil particles. These pollutants, which are often the primary concern for the
impairment of surface waters, can include nutrients, pesticides, oils and grease, concrete
truck washout, and construction chemicals and debris.
7.1 AZPDES Requirements and Guidelines
The regulatory requirement for construction site stormwater runoff control is that
regulated MS4s:
V.B.4.a Develop, implement, and enforce a program to reduce pollutants in any stornnvater
runoff to the small MS4 ftom construction activities that result in a land
disturbance of greater than or equal to one acre. Reduction of stormwater
discharges from construction activity disturbing less than one acre must be
included in the program if that construction is part of a larger common plan of
development or sale that would disturb one acre or more. If the Department
waives requirementsfor stormwater discharges associated with small construction
activity, defined under 40 CFR 122.26(b)(15)(i), the permittee is not required to
develop, implement, andlor enforce a program to reduce pollutant discharges
from these sites.
V.B.4.b Using an ordinance or other regulatory mechanism available under the legal
authorities of the small MS4, require construction site operators to practice
erosion and sediment control and require construction site operators to control
waste and properly dispose of wastes, such as discarded building materials,
concrete truck washout, chemicals, litter, and sanitary waste at the construction
site that may cause adverse impacts to water quality. This ordinance must apply,
at a minimum, to those sites described in Part V, Section B.4.a.
V B. 4. c Review all site plans for those sites described in Part V, Section B. 4. a. for potential
water quality impacts, including erosion and sediment control, control of other
wastes, and any other impacts that must be examined according to the
requirements of the law or ordinance of Part V.B.4.b. Before ground is broken at
the construction site, the small MS4 operator shall review the plans and verify (in
written communication with the construction site operator) that the BMPs for the
site are appropriate.
V B. 4.d Develop and implement procedures for site inspection and enforcement of control
measuresfor those sites described in Part V, Section BAa.
VM
a-
AZPDES requires that a permittee's SWMP include the following information:
AZPDES requirement V.B.4.e
i. A description or citation of the established. ordinance or other regulatory
mechanism used to prohibit erosion and ensure proper management ofwaste
on construction sites per Part V, Section B.4.a. If the permittee needs to
develop this mechanism, describe the plan and schedule to do so,
ii. A description of the sanctions and enforcement mechanism(s) to ensure
compliance;
iii. A description of the proceduresfor site inspection and enforcement of control
measures, andproceduresfor site plan reviews;
iv. Procedures for receipt, acknowledgement and consideration of information
submitted by the public;
V. A list of measurable goalsfor the construction site stormwater runoff control
program;
vi. Dates, in terms of months and years, by which the permittee will achieve
specific measurable goals; and
vii. The name(s) and title(s) of the person(s) responsible for overseeing
construction site stormwater runoffcontrol activities.
7.2 Efforts to Date
The measures described below are currently used by the Town of Marana to reduce or
prevent stormwater pollution during construction activity.
7.2.1 Building Permits
7.2.1.1 Building Plan Review
Plans submitted for new construction or enlargement must provide sufficient details of
proposed structural features and electrical, plumbing, and mechanical installations to
permit evaluation of building adequacy by the Town Building Inspector.
Once a permit application is submitted, the building department circulates the application
throughout the appropriate departments for individual reviews. The planning department
and the engineering department conduct these additional reviews.
"A,
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The planning department reviews the building application and site plan to make sure that
the new proposal is consistent with planning and zoning codes and ordinances. The
planning department will also evaluate the plans to see if a native plant permit is
necessary. Once this assessment is completed, the engineering department will review the
application and site plan.
The engineering department reviews plans for grading and floodplain. If, during the
engineering review, the department determines that a grading permit or a floodplain use
permit are necessary, the applicant will be required to submit for those permits as well.
Once the planning department and the engineering department have considered and
accepted the plans, the building department completes their review and issues permits to
those plans found to be acceptable.
Copies of building permit applications are included in Appendix D.
7.2.1.2 Training
The Town of Marana has a number of Plans Examiners that review the site plans for
building permit applications. The Plans Examiners that work for the Town are required to
have six years of prior building inspection and plans examining experience with a
municipal building department. If the person is registered as an Architect or Engineer
with the State of Arizona, that certification may substitute for four years of the
experience. Building inspectors must obtain, within 12 months of employment, a
professional certification as a Plumbing, Electrical, Mechanical, or Building Inspector.
This certification must be approved by a Town building official and maintained for the
entire period of employment with the Town.
7.2.1.3 Construction Site Inspection/Enforcement
The number of inspections of a site depends largely on the type of activity taking place
on the site. There are a number of inspections that must be completed at different stages
in the building process once a building permit is issued. These inspections are conducted
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by the Town of Marana Building Inspectors. Inspections are done in phases (preliminary,
intermediate, and finals) and early inspections must be passed before later inspections
may take place.
7.2.2 Grading Permits
Requirements for Type I and Type 11 grading permits are contained in the Marana Land
Development Code, Title 19. For ease of reference, Title 19 is included in Appendix D of
this SWMP document.
7.2.2.1 Plan Review
The Engineering Division reviews all permit applications and makes a determination on
the type of grading permit to be issued, Type I or Type 11. The Town of Marana currently
reviews and issues Type I grading permits in-house. The Type 11 grading permits are
reviewed by staff and when accepted, permits are issued by the Town. Staff review all
SWPPPs and no grading permits are issued until a SWPPP` is accepted.
7.2.2.2 Training
The consultants reviewing Type 11 grading permits are registered Civil Engineers or
To wn staff. The Type I grading permit review is currently carried out by Town of Marana
Engineering staff. The primary training for Type I reviewers consists of daily interaction
with the Town Engineer and Consulting Engineers regarding proper application review.
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7.2.2.3 Construction Site Inspection/Enforcement
For Type II grading permits, casual surveillance is conducted daily on each construction
site. If there is a problem with the property or a violation has taken place, a report is
completed and submitted to the Town or to an agency acting on behalf of the Town. A
stop work order will be issued if sediment and erosion controls are not present on site as
outlined in the Stormwater Pollution Prevention Plan (SWPPP). Town construction
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inspectors will inspect Capital Improvement projects bi-weekly to ensure compliance
with the SWPPP, or to address issues that may trigger changes to the SWPPP.
Copies of grading and floodplain use permit applications can be found in Appendix D.
7.3 Ordinances.
7.3.1 Marana Town Code
Marana's Town Code includes regulations that pertain to control of construction site
stormwater runoff. The relevant sections of Code are as follows:
Title 7: Building
Purpose (Section 7-1-1)
A. "The Marana building code shall have the following purposes:
1. Regulate the site preparation and construction, alteration, moving, demolition,
repair, use and occupancy of buildings, structures and building service equipment
within the jurisdiction...
4. Provide for penalties for the violation of building codes."
Building Codes Adopted (Section 7-1-2)
A. "The Marana Building Code consists of the following code documents incorporated
by this reference in this title, all of which are on file with the Town clerk's office:
I . The 2006 international building code, with local amendments;
2. The Arizona State plumbing code...
3. The 2006 international residential code, with local amendments.
4. The 2006 international mechanical code, with local amendments.
5. The 2006 international property maintenance code, with local amendments.
6. The 2006 international energy conservation code, with local amendments.
7. The 2005 national electric code, with local amendments.
8. The 1997 uniform fire code, with local amendments..."
B. "The Marana Building Code adopts by reference the following local ordinances and
codes...
1. 2006 Marana pool and spa Code..."
Violation a civil inftaction (Section 7-1-5)
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"It shall be a civil infraction for any person, firm or corporation to violate any of the
provisions of this title. Civil infractions shall be enforced as provided in chapter 5-7 of
this code. Each day a violation continues shall be considered a separate offense."
Chapter 7-2 Building Permits
Application Requirements (Section 7-2-1)
A. "Any person, partnership, firm or corporation desiring to construct, erect, enlarge,
substantially modify or move any residential building or mobile home or other
structure shall first make application for a building permit to the building department
and shall not commence that construction without first obtaining a building permit
from the Town.
B. Any person, partnership, firm or corporation desiring to erect, construct, enlarge,
move or substantially modify any commercial, industrial, quasi-public or public
building or structure shall first make application to the building department for a
separate building permit for each building or structure and shall not undertake that
construction, enlargement, movement or modification without first obtaining a
building pen-nit from the Town."
7.3.2 Town of Marana Land Development Code
The Town of Marana's Land Development Code includes extensive regulations to control
construction site stormwater runoff. The Town of Marana is anticipating a rewrite of the
Land Development Code beginning in 2006 with completion by 2008. The relevant
sections of current Code are as follows:
Title 5:Zoning
Zone D - Designated Flood Plain Zone (Reference 05.02.04)
D. "Approval Required. No construction or excavation that will alter the natural
drainage pattern, direction or rate of flow, or the carrying capacity of the Santa Cruz
River or the Brawley Wash can be performed unless previously approved by the
Town Council after recommendation from the Planning Commission."
Application (Reference 05.06.02)
D. Development Capability Report
"The development capability report is a map and text summary of the impact of the
proposed development on site conditions existing on the land to be regulated by the
specific plan that shall address the following ...
2. hydrology and water resources..."
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E. Specific Plan
1. "The map elements of the specific plan shall illustrate and identify ...
a. Drainage plan..."
2. "The text elements for the specific plan shall describe and contain ...
e. Hydrology analysis
g. Standards for the phasing, construction, and maintenance of sewage
disposal, effluent use, stormwater drainage, solid waste disposal and
public utilities
h. Standards for the conservation, development or utilization of natural
resources, including surface water, soils, vegetation and wildlife..."
Resort and Recreation Zone (Reference 05.11.07)
P. "Nuisance
All uses shall be so located, constructed, and operated so as to not constitute a
public nuisance because of dust ... or other public nuisances."
Q.2.d "The design, scale and layout of the proposed development will not ... have a
negative impact on the...health, safety, or welfare of neighboring uses."
Title 6: Subdivisions
"The purpose of this title is to ... secure adequate provisions for water supply, drainage,
sanitary sewerage..."
Improvement Requirements (Reference 06 03.02)
A. "Streets. The required streets shall be graded and paved and all required drainage
improvements shall be installed..."
B. "Sanitary Sewers. The required off-site and on-site sewer lines shall be installed in
such a way that each lot can be served therefrom..."
E. "Stormwater Drainage and Retention Facilities. The required off-site and on-site
drainage facilities shall be installed..."
K. "Environmental Hazards. The subdivision layout shall make adequate provision for
natural drainage channels and floodways. Added surface water produced by the
subdivision's development, particularly excess runoff created by paving, shall be
properly disposed of within the subdivision or shall be drained into natural or man-
made channels in a manner that will minimize the exposure to flood hazard, and will
minimize erosion of soil ... All other environmental hazards must be eliminated or
adequately restricted as directed by the Town."
Title 17: Environmental Resource Preservation, Native Plant Protection,
Landsc@pe Reguirements
Landscape Plan Requirement (Reference 17.03-03)
"An approved landscape plan ... is required prior to approval of the development plan,
tentative plat and final plat or issuance of building permits."
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Landscape Plan Content and Standards (Reference 17.03.06)
1. "Any part of a development site which has been disturbed and is not required for
buildings, structures, private residential yards, loading and vehicular access ways,
streets, paved parking and utility areas, pedestrian walks and hard-surfaced activity
areas shall be landscaped."
Title 19: Standards for Grading and Related Site Work
Purpose and Interpretation (Reference 19. 010)
A. Purpose
1. "The purpose of this Title is to protect the public health, safety, general
welfare, and aesthetics by regulating grading and related site work..."
B. Interpretation
3. In all projects, measures shall be taken to:
a. Ensure that graded hillside, slopes, or other areas subject to erosion are
stabilized;
b. Reduce the erosion effects of stormwater discharge, preserve the
floodway-carrying capacity of natural or constructed waterways by
limiting soil loss, and protect drainways from siltation;
c. Minimize dust pollution and surface water drainage from graded areas
during grading and development; and
d. Ensure that development activity is designated and implemented to
minimize adverse impacts and include appropriate restorative measures."
General Grading and Related Site Work Performance Standards (Reference 19.040)
C. "Slopes. All exposed cut or fill slopes shall be revegetated or stabilized in YW
accordance with the approved grading plan."
D. "Terracing. Terracing to control surface drainage and debris on cut of fill slopes
may be required." so
E. "Fill: Fill shall be compacted and soil-tested in accordance with Town of Marana
standards."
H. Drainage Control Systems Ism
1. Permanent control systems:
a. "Erosion control shall be constructed and maintained to prevent erosion
of slopes, and cleared, brushed, grubbed, or graded areas in accordance OW
with the approved grading plan and Town of Marana standards."
c. "Erosion control devices to prevent erosion or sediment deposition on
off-site property may be required."
e. Surface drainage:
(2). "Approved surface drainage interceptors shall be provided at
the top of cut and fill slopes where there is runoff and erosion
potential."
1. Import and export of earth and materials:
2. "The transportation of earth material on public right-of-way shall be in a
manner that minimizes blowing soil and other hazards."
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K. Restrictions of vehicles:
1. "No vehicles shall be driven over 'natural open space areas', as designated on
the approved grading plan."
2. "Points-of-entry to the site during construction shall be only as designated on
the approved grading plan."
3. "For Type 2 permits, access roads to the site during construction shall be only
as designated on the approved grading plan."
L. Additional requirements:
1. "During construction, and until revegetation or stabilization has taken place,
dust shall be minimized through application of approved dust controls as may
be required by Town of Marana staff."
2. "Public rights-of-way, sidewalks, and other improvements shall be maintained
during construction in a neat and clean condition, free of loose soil,
construction debris, and trash."
3. "Debris, fill, or equipment shall not be stored within a public right-of-way
without the written approval of the Town of Marana."
4. "Cut or fill material in excess of that allowed by the permit shall be disposed of
in an approved manner."
M. "Removal of native vegetation. In order to minimize erosion ' and sedimentation
in the run off from the Tortolita mountains, native vegetation shall not be
removed from that part of the Town of Marana East of I-10 except where the
Town Engineer has approved the methods to control erosion, sedimentation, flow
and related factors..."
Submittal and Procedures: Type 1 (Reference 19.050)
C. "Grading statement. A written grading statement shall be submitted with an
application for a permit. The Statement shall include, where applicable:
1. A description of stabilization, erosion, and drainage control measures;
2. The off-site disposal location and estimated quantity of earth material and
vegetation to be removed from the site during construction;
4. A description of the dust control method to be used during construction and
until revegetation or stabilization has been completed."
1. Changes to permit:
1. "If drainage problems, flood hazards, or other potential hazards become
known that were not considered at the time the permit was issued, the Town
of Marana may require that engineering modifications be submitted in a report
and that the design be modified."
Submittal and Procedures: Type 2 (Reference 19.060)
B. "Grading plan requirements:
4. A description of the mitigation methods-to be used during grading and until
revegetation or stabilization has been completed.
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6. The extent and manner of preserving, relocating, clearing and disposing of
vegetation.
7. The final ground cover, revegetation
methods for cut or fill stabilization...
(if any), erosion control and proposed
9. Where drainage improvement plans have not been submitted separately of
where interim drainage conditions exist because of project phasing, plans for:
a. Drainage or other protective devices to be constructed as part of the
grading;
b. The drainage area and estimated runoff of the area served by the
drains."
G. Preliminary grading:
2. "Preliminary grading assurances;
c. Eliminate potential hazardous conditions; or
(1) Mitigate the effect of dust, drainage, erosion, visual scars or
hazardous conditions, in accordance with the approved
design."
J. Changes to permit:
1. "Hazardous conditions. If drainage problems, flood hazards, or other potential
hazards become known that were not considered at the time the permit was
'issued, the Town of Marana may require that engineering modifications be
submitted in a report and that the grading design be modified."
Inspection and Performance Defaults (Reference 19.070)
A. General inspections:
1 . "All construction which requires a permit shall be inspected by the Town of
Marana in accordance with the permit."
2. "If the Town of Marana finds site conditions are not ... [as] stated in the
approved permit conditions, the Town of Marana may order work
authorized ... [by] the permit to stop until a revised grading plan has been
approved."
B. Inspection certification option:
1. "Upon.approval by the Town of Marana, the owner may retain a Civil Engineer,
registered to practice in the State of Arizona, to:
a. Perform the required construction inspection.
b. Certify, upon completion, that the construction has been performed and
completed in accordance with the permit conditions, the approved plans and
specifications, and with applicable Town of Marana standards."
6. "The Town of Marana may periodically inspect the work and will monitor the
progress. The Town of Marana will conduct a final inspection upon receiving
notice of completion and will release all parties from the permit only after all
provisions of the permit and the agreement have been complied with.
7. "The owner, in receiving a permit for construction, shall guarantee all work
accomplished under the permit for a period of at least one year following the
acceptance of the project and release of the permit."
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C. Final inspection of rough grade:
4. "The soils report and certification of substantial conformance shall be submitted
to the building official prior to issuance of a building permit."
D. Final inspection:
2. "Where the conditions of a permit include the establishment of vegetation or
other final site work that extends beyond the expiration of the permit, the Town
of Marana shall make a post-construction inspection within six months of
permit expiration or as required by the permit."
E. Maintenance of vegetation:
1. "Maintenance of approved landscaping and revegetated areas shall consist of
regular watering, pruning, fertilizing, clearing of debris and weeds, the removal
and replacement of dead plants, and the repair and replacement of irrigation
systems and architectural features."
2. "Maintenance assurances: The final approval of any subdivision plat or
development plan that includes an approved final landscaping plan shall require
covenants or assurances which:
a. Ensure the continued maintenance of required landscaping, buffering and
associated irrigation systems; and
b. Assign the responsibility of -maintenance to the property owner of agent, a
homeowner's association or other liable entity."
F. "Town personnel, qualified in landscape architectural review will periodically spot-
inspect landscape installations for compliance with this Title and approved landscape
plans."
Enforcement and Penalties (Reference 19.080)
B. "When ever the Town of Marana determines that grading does not comply with this
Title or the permit conditions, or that the soil or other conditions are not as stated on
the permit, the Town of Marana may order the work stopped by written notice
served on any person engaged in doing or causing such work to be done."
C. Penalties
I . "Unless exempted by this Title ... failure to obtain a permit prior to
commencement of grading shall be a violation of this code."
2. "A violation may result in issuance of a stop-work order, and penalties may be
assessed in accordance with the Town of Marana Development Code. A
violation of this Title shall also constitute a Class I misdemeanor. Payment of
any fines or penalties shall not relieve any person from otherwise complying
with the requirements of this Title. Each and every day that a violation of this
Title exists shall be deemed to be a separate offense."
Title 2 1: Flood Plain and Erosion Hazard Management Code
Standardsfor Subdivisions and Commercial Developments (Reference 21.05.04)
A. "All preliminary subdivision plats and development plans shall delineate the
FEMA SFHA, Floodway if applicable, locally regulated floodplain; erosion
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hazard setback areas, and Base Flood elevations. The pre- and post- development
conditions shall be shown."
B. "All final subdivision plats shall provide the elevation of each proposed structure
and pad affected by or adjacent to flood hazards. If the site is filled above the
Base Flood, the final lowest floor and pad elevation shall be certified by an
Arizona Registered Professional Civil Engineer or surveyor and provided to the
Floodplain Administrator. All final subdivision plats shall delineate the FEMA
SFHA, Floodway if applicable, locally regulated floodplain and erosion hazard
setbacks in a surveyable manner and sealed by an Arizona Registered Land
Surveyor."
D. "All subdivision and commercial development proposals shall be consistent with
the need to minimize flood damage."
Detention and Retention Requirements (Reference 21.05. 11)
C. "Structural flood control measures may be proposed in conjunction with, or in
place of detention/retention systems if it can be clearly demonstrated that such
measures will not alter the water and sediment equilibrium of the affected
watercourse, and will mitigate environmental impacts."
D. "Localized areas lacking sufficient improved or natural receiving waters into
which runoff may be discharged may be required to follow alternative drainage
solutions including complete retention practices as directed by the Town
Engineer."
Title 22: Off-Street Parking and Loading
Parking Areas - Surfacing Requirements (Reference 22.090)
"Any off-street parking areas shall be surfaced in accordance with the specifications set
forth by the Town standards, so as to be a durable and dustless surface and shall be
graded and drained so as to dispose of all surface water accumulated in the area..."
7.4 Action Plan for Construction Site Stormwater Runoff Control
The Town of Marana's action plan for construction site stormwater runoff control is as
follows. The format is structured according to the guidelines provided by ADEQ.
7.4.1 Construction Site Stormwater Runoff Control Ordinance
V.B.4.e.i Include in the SWMP a description or citation of the established
ordinance or other regulatory mechanism used to prohibit erosion and
ensure proper management of waste on construction sites per Part V,
Section B.4.a If the permittee needs to develop this mechanism,
describe the plan and schedule to do so.
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The Town of Marana's Land Development Code and Town Code include extensive
regulation of construction site operations. These regulations, as previously cited, control
numerous aspects of the construction process including erosion and sedimentation
control, treatment of waste on construction sites, and impacts of construction on natural
drainages.
Marana undergoes an extensive review of each building and grading application
submitted to the Town. Building permits are required, by ordinance, for any unattached
building greater than 120 square feet, any building improvements, most developments V2-
acre in size or larger (see Section 7.2 for details), new pavement of more than 3,000 ft2,
stockpiling of fill, clearing of an area V2-acre or larger, and any grading.
This application process requires that permittees develop and submit information on
natural drainage flow on their property, any drainage improvements, proximity to the
100-year floodplain, total area of grading, grading plan including proposed cut and fill
slopes and grade breaks, sewer or septic tank connections, and dust control measures.
This information ensures that construction activities are developed in accordance with
standards that minimize runoff from the properties. Permittees must also describe all
mitigation methods to be used during grading until such point in time that revegetation
and stabilization has been completed. (Requirements and permit applications are
contained in Appendix D).
During the construction process, permittees must take steps to: stabilize all slopes or
areas subject to erosion; reduce sedimentation runoff and erosion effects of stormwater
discharge; limit soil loss so as to preserve the floodway-carrying capacity of any natural
or constructed waterway; minimize dust pollution; minimize surface water drainage from
graded areas; and minimize any other adverse impacts from the grading and development
(Reference 19.010).
The Town strictly regulates all grading activities by requiring that: all exposed slopes be
revegetated and stabilized; any fill be compacted; sediment and erosion control measures
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be constructed and maintained so as to prevent sediment runoff and erosion; any transport
of earth material be done in a manner that minimizes dispersal or dumping of material;
points-of-entry and access roads on the site be restricted; dust control be implemented;
public rights-of-way and sidewalks be maintained free of loose soil, debris, and trash; and
excess earth material be disposed of in an appropriate manner. The Town may also
require permittees to create terraces for the purpose of controlling surface drainage and
debris, implement erosion control devices to prevent erosion or sediment deposition off-
site, and provide surface drainage interceptors on cut and fill slopes where there is runoff
and erosion potential (Reference 19.040).
Any grading or construction activities that require a permit are also subject to inspection
during the process. A final inspection will also be conducted once all work is done to
ensure that grading and/or construction was done according to plan. If conditions in the
permit require revegetation or any other measures whose life extends beyond the
expiration of the permit, then the Town may conduct a post-construction inspection at
some point after the permit has expired. The owner of the property must guarantee any
work done under a development or grading permit for a period of at least one year after
Awl
the expiration of the permit and acceptance of the project. 1W.
During the permit period, the Town of Marana will review existing Code and determine
if any additional provisions are necessary. The Town began developing interim policies
for additional control of construction site stormwater runoff in August/September 2005 to
take effect as soon as documents are finalized, and will begin development of a
stormwater ordinance upon acceptance of this Stormwater management program by AW
Town Council.
7.4.2 Sanctions and Enforcement Mechanisms
V.B.4.e.ii Include in the SWMP a description of the sanctions and enforcement
mechanism(s) to ensure compliance.
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Currently, violation of any provision of the Land Development Code and Marana Town
Code constitutes a Class I misdemeanor. Non-compliance is subject to the issuance of a
stop-work order and/or fines.
Beyond enforcement policies for existing Town of Marana regulations, consideration will
be given to the development of a plan for further enforcement actions. Any new
enforcement policy, if it is necessary, may include verbal or written warnings,
administrative actions, fines, cost recovery, and/or legal action. Town development
engineering staff will issue a stop work order until deficiencies with SWPPP
implementation are corrected.
7.4.3 Site Inspection and Plan Review
VB.4.e.iii Include in the SWMP a description of the procedures for site
inspection and enforcement of control measures, and procedures for
site plan reviews.
7.4.3.1 Site Inspection/Enforcement
Building Site Inspection/Enforcement
The number of inspections of a site depends largely on the type of activity taking place
on the site. There are a number of inspections that must be completed at different stages
in the building process once a building permit is issued. These inspections are conducted
by the Town of Marana Building Inspectors. Inspections are done in phases (preliminary,
intermediate, and finals) and early inspections must be passed before later inspections
may take place.
Construction Site InsMction/Enforcement
For Type II grading permits, casual surveillance is conducted daily on each construction
site. If there is a problem with the property or a violation has taken place, a report is
completed and submitted to the Town or to an agency acting on behalf of the Town.
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During the permit period, staff will develop a site inspection procedure that explicitly
covers stormwater management concerns, document criteria used to set inspection
priorities, and describe the frequency of inspection of construction sites.
Each site will be inspected for stormwater compliance at least once during the
construction period. If necessary, building/site inspectors will be trained on proper
erosion and sediment controls and requirements by the storrnwater management program
coordinators.
7.4.3.2 Plan Review
Building Plans
Plans submitted for new construction or enlargement must provide sufficient details of
proposed structural features and electrical, plumbing, and mechanical installations to
permit evaluation of building adequacy by the Town Building Inspector.
Once a permit application is submitted, the building department circulates the application
throughout the appropriate departments for individual reviews. At present, these
additional reviews are conducted by the planning department and the engineering
department.
The planning department reviews the building application and site plan to make sure that
the new proposal is consistent with zoning ordinances. The planning department will also
evaluate the plans to see if a native plant permit is necessary. Once this assessment is
completed, the engineering department will review the application and site plan.
The engineering department reviews plans for grading and floodplain. If, during the
engineering review, the department determines that a grading permit or a floodplain use
permit are necessary, the applicant will be required to submit for those permits as well.
Once the planning department and the engineering department have considered and
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accepted the plans, the building department completes their review and issues permits to
those plans found to be acceptable.
Grading Plans
Once a permit application is received by the engineering department, they will determine
if the submittal needs to be issued a Type I grading permit or a Type 11 grading permit.
The Town of Marana currently reviews and issues Type I grading permits in-house. The
Type 11 grading permits are reviewed by consultants and, once accepted, are issued by the
Town.
Type I plan reviews, in part, consist of ensuring that the drainage of the property is not
substantially altered, whether drainage improvements are planned that will adequately
control stormwater runoff, that there is sufficient slope protection on any cut and fill
areas, and that no construction activity occurs within a wash or floodplain without a
floodplain use permit.
7.4.4 Public Reporting Procedures
V.B.4.e.iv Include in the SWMP procedures for receipt, acknowledgement and
consideration of information submitted by the public.
The observations of community members are often an important source of information
regarding construction site runoff. As outlined in a previous section on public
involvementiparticipation, the Town will develop and implement a procedure that
enables the public to report suspect construction site runoff. Reported sites will be subject
to the inspections consistent with current construction site inspection procedures.
This procedure will include, at a minimum, the listing of a phone number for
'6construction-related citizen concern reports" on the Town of Marana website, in targeted
brochures and other public outreach materials, and in office lobbies. Calls to this number
will be directed to the SWMP contact person who will keep a written log of all citizen
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reports, including date and time of call, location of the construction site, and nature of the
concern. Citizen concern report information will be provided to the appropriate Town
staff member by the end of the day. The goal is to have follow up on each citizen concern
report within three working days.
7.4.5 Measurable Goals
VB.4.e.v Include in the SWMP a list of measurable goalsfor the construction site
stormwater runoff control program.
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The measurable goals for reduction or elimination of construction site runoff can be
found in Table Four: Construction Site Stormwater Runoff Control Measures and
Milestones (found on page 91).
The Town of Marana will include the following information in the annual MS4
compliance report:
1. Ordinance
a. Date and description of any modification made to current Town of Marana
Land Development Code to meet construction site runoff control
requirements
2. Plan Review
a. Number of development plan reviews conducted per year
3. Site InsDection
a. Staff responsible for conducting inspections WK
b. Number of grading permits issued requiring stormwater construction
permit (SWPPP) inspections.
c. Number and type of enforcement actions taken, if any AW
4. Public ReRgrts
a. Number of reports received from members of the public
7.4.6 Implementation Schedule
VB.4.e.vi Include in the SWMP dates, in terms of months andyears, by which
the permittee will achieve specific measurable goals.
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The dates by which each measurable goal will be achieved are specified in Table Four:
Construction Site Stormwater Runoff Control Measures and Milestones (found on
page 91).
7.4.7 Staff
V.B.4.e.vii Include in the SWMP the name(s) and title(s) of the person(s)
responsiblefor overseeing construction site stormwater runoff control
activities.
A staff member will draft any necessary ordinance and/or develop enforcement strategies.
Town personnel will review and Town Council will adopt ordinances as necessary to
control construction site stormwater runoff. A staff member will develop Inspection
procedures and forms. A staff member will manage and determine appropriate response
to public reporting.
7.5 Measurable Goals and Implementation
The BMPs and measurable goals by which they will be implemented, are identified in the
following Table. The table includes the implementation schedule and references to t he
relevant ADEQ requirements.
Table Four: Construction Site Stormwater Runoff Control Measures and
Milestones
Reference BMP Measurable Goal Target
Date
V.BAa 1. Staff will a. Identify whether current Town Code a. Dec.
V.BAb develop, if adequately addresses construction site 2006
V.BAe necessary, an stormwater runoff control.
ordinance or
other b. Outline any necessary additions to b. Feb.
regulatory existing Town Code if applicable. 2007
mechanism to
control c. Draft new Code provisions. C. July
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construction
site
stormwater
runoff.
d. Submit draft Code for legal and
technical review.
e. Submit Code for approval by Town
Council.
f. When new provisions are approved,
implementation will begin. Ordinance
approval and implementation will be done
in accordance with the public notice
requirements of the State of Arizona
(A.R.S. 39.204 and 9.812). 2007
d. Sept.
2007
e. Oct.
2007
f. Nov.
2007
V.B.4.a 2. Staff will a. Modify existing review process based a. Begin
V.B.4.c review all site on any new ordinances or procedural Sept.
V.B.4.e plans for requirements adopted for compliance with 2004,
potential the AZPDES. ongoing
water quality
impacts. b. Require all construction projects b. Sept.
disturbing one acre or more to submit a 2004
copy of their NOI (and verify
authorization number online through
ADEQ website or obtain ADEQ's
authorization letter from applicant),
SWPPP, and/or NOT.
c. Review all site plans for projects c. Begin
disturbing one or more acres for Mar.
stormwater runoff potential and review 2006,
stormwater pollution prevention plans ongoing
(SWPPPs) prior to accepting grading or
building permits.
V.B.4.a 3. Staff will a. Modify existing inspection process a. Begin
V.B.4.d inspect based on any new ordinances or Feb.2006,
V.B.4.e construction procedural requirements adopted for ongoing
sites for compliance with the AZPDES.
compliance
with runoff b. Determine criteria for setting inspection b. Sept.
control priorities. 2006
requirements.
c. Conduct an inspection of each active c. Beg.
construction site monthly. Oct. 2006,
ongoing
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8 POST-CONSTRUCTION STORMWATER
MANAGEMENT IN NEW DEVELOPMENT AND
REDEVELOPMENT
Land development significantly impacts the quality of surface waters through the
alterations of the natural landscape, especially through the increase in impervious surface.
This land use change increases not only the quantity of stormwater runoff but also the
quality of the stormwater. Increased runoff volumes can cause downstream flooding,
channel and bank erosion, sedimentation, and reduced groundwater recharge. The
pollutants carried by these larger stormwater flows can include soil sediments, oils,
grease, litter, and other toxic substances thaf collect on paved or otherwise impervious
surfaces.
8.1 AZPDES Requirements and Guidelines
The Arizona Pollutant Discharge Elimination System contains requirements for regulated
MS4s to ensure post-construction stormwater runoff control in new development and
redevelopment with the following minimum control measures:
V.B.5.a Develop, implement, and enforce a program to address stormwater
runoff Jrom new development and redevelopment projects that
disturb one acre or more, including projects less than one acre that
are part of a larger common plan of development and discharge to
the small MS4.
V.B.5.b Develop and implement strategies that include a combination of
structural andlor non-structural BMPs appropriate for the
community.
V.B.5.c Adopt an ordinance or establish another regulatory mechanism to
address post-construction runoff from new development or
redevelopment projects to the extent allowable under the legal
authorities of the small MS4.
V.B.5.d Ensure adequate long-term operation and maintenance of BMPs.
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AZPDES regulations require that a permittee's SWMP include the following information:
VR5.e
i. A description of the management practices to reduce post-construction
runoffftom new development and redevelopment projects within the MS4;
address any specific priority areas and tailor to the community
ii. A description or citation of the established ordinance or other regulatory
mechanism used to address post-construction runoff control. If the
permittee needs to develop the required regulatory mechanism, describe
the plan and schedule to do so;
iii. A description of the procedures to ensure compliance with local
requirements;
iv. A description of the education program for developers and the public
aboutproject designs that minimize water quality impacts;
V. An identification of the measurable goals for the post-construction runoff
controlprogram;
vi. Dates, in terms of months and years, by which the permittee will achieve
specific measurable goals; and
vii. The name(s) and title(s) of the person(s) responsible for the development,
implementation, and enforcement of post-construction stormwater
management.
8.2 Efforts to Date
8.2.1 Grading Plan Review
In addition to the Grading permit process as described in Section 7.2, the Town of
Marana has a checklist for the Release of Assurances. This checklist consists of items
that must be submitted, waived, or otherwise addressed by a permittee prior to release of
assurance (as of October 2005, the checklist is being updated).
A-,
The Town requires the permittee to provide proof of formal acceptance/approval of sewer MO.
line and manhole installation from Pima County Wastewater Development Services, a
copy of site dust control permit obtained from Pima County Department of
Environmental Quality, a Landscape Plan, a detailed agreement for maintenance of
landscaping, and a one year guarantee of work. These requirements are expected to result
in a beneficial effect on the quality of stormwater. If sedimentation or erosion problems
94
occur associated with the permitted work, the Town has one year to address the issue and
require the owner/operator to correct the problem at the owner's expense. Erosion due to
unstable banks, trash or debris left after construction, and faulty landscaping plans
allowing undesired vegetation to enter the stormwater system are a few of the problems
that may be addressed after construction is completed.
8.2.2 Site Inspection/Enforcement
Before a subdivision or building is accepted by the Town, a permittee is required to
schedule a final building inspection and a final grading inspection. This provides Town
inspectors the opportimity to evaluate the finished site for compliance with the grading
plan and to ensure that no other drainage issues have developed since grading began.
8.2.3 Detention/Retention Basin Maintenance
Any detention or retention basins or dry wells required for post-construction stormwater
runoff control from a development must be maintained by the owner of the feature. In
most cases, the owner is the Homeowner's Association. The Town of Marana will
respond to citizen concern reports regarding these control features by inspecting the site
and notifying the responsible party of their obligation to maintain the feature.
8.2.4 Town of Marana Land Development Code
The Town of Marana's Land Development Code includes extensive regulations to control
post-construction site stormwater runoff. The Town of Marana is anticipating a rewrite of
the Land Development Code beginning in 2006 with completion by 2008. The relevant
sections of current Code are as follows:
Title 5:Zoning
Specific Plan Report (Reference 05.06.08)
A Report
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"The owner or agent for each adapted Specific Plan shall annually, within 30 days of the
anniversary of the specific plan approval, submit a written report to the Town of Marana
including, but not limited to, the past year's development activity, utility, sewer, water,
drainage and street improvement activities ... and estimates for the upcoming year in the
above categories."
Title 19: Standards for Grading and Related Site Work
W?
Purpose and Intent (Reference 19.010)
A. Purpose
"The purpose of this Title is to protect the public health, safety, general welfare, and
aesthetics by regulating grading and related site work..."
Submittal and Procedures: Type 1 (Reference 19.050)
1. Changes to Permit
1. "If drainage problems, flood hazards, or other potential hazards become known
that were not considered at the time the permit was issued, the Town of Marana
may require that engineering modifications be submitted in a report and that the
design be modified."
Submittal and Procedures: Type 2 (Reference 19.060)
J. Changes to Permit
1. "If drainage problems, flood hazards, or other potential hazards become known
that were not considered at the time the permit was issued, the Town of Marana
may require that engineering modifications be submitted in a report and that the
design be modified."
8.3 Action Plan for Post-Construction Site Stormwater Runoff Control
The Town of Marana's action plan for post-construction site stormwater runoff control is
as follows. The format is structured according to the guidelines provided by ADEQ.
8.3.1 Post-Construction Runoff Management Practices
V.B.5.e.i Include in the SWMP a description of the management practices to
reduce post-construction runoff from new development and
redevelopment projects within the MS4; address any specific priority
areas and tailor to the community.
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am
L:mo
The Town of Marana requires any company seeking a grading permit to submit a site
plan identifying specific post-construction runoff controls. The post-construction runoff
BMPs must be consistent with the accepted standards established in the Pima County
Stormwater Detention/Retention Manual (PCSWDR) contained in Appendix F, and the
2000 Revised Development Requirements for Drainage in Northern Marana contained in
Appendix G. The PCSWDR Manual contains technical standards for post-construction
BMPs and the operation and maintenance requirements for those BMPs.
At the point in time at which a Homeowner's Association (HOA) has been designated for
a subdivision, maintenance of post-construction runoff control features transfers from the
developer to the HOA. During the permit period, the Town of Marana will develop an
informational presentation and brochure that will be offered or mailed to all HOAs within
the Town boundaries notifying them of their responsibility to maintain such features and
recommending practices and methods for the process, recordkeeping required, and Town
of Marana reporting procedures.
During the permit period, the Town will evaluate the existing plan review process to
identify opportunities to integrate further post-construction controls. If water quality
impairments are identified by ADEQ, EPA, or other jurisdictions, the post-construction
plan will be revised to include strategies and BMPs targeted to reducing relevant
pollutants.
83.2 Post-Construction Runoff Control Ordinance
V. B. 5. e. ii Include in the SWMP a description or citation of the established
ordinance or other regulatory mechanism used to address post-
construction runoff control. If the permittee needs to develop the
required regulatory mechanism, describe the plan and schedule to do
SO.
The Town of Marana's Land Development Code includes controls over post-construction
stormwater runoff in the form of a grading and building permit requirement. These
permits require that post-construction stormwater controls be planned and approved prior
97
to the beginning of construction. The Town will inspect for final stabilization and
removal of temporary sediment and erosion BMPs prior to approving final release for
NOT filing.
8.3-3 Enforcement Procedures
V.B.5.e.iii Include in the SWMP a description of the procedures to ensure
compliance with local requirements.
Currently, violation of any provision of the Land Development and Marana Town Code
constitutes a Class 1 misdemeanor. Non-compliance is subject to the issuance of a stop-
work order and/or fines.
Beyond enforcement policies for existing Town of Marana ordinances, consideration will
be given to the development of a plan for further enforcement actions. Any new
enforcement policy, if it is necessary, may include verbal or written warnings,
administrative actions, fines, cost recovery, and/or legal action.
8.3.4 Education Program
V. B. 5. e. iv Include in the SWMP a description of the education program for
developers and the public about project designs that minimize water
quality impacts.
The amount of soil and other pollutants carried by stormwater runoff from developed
areas is, in part, a function of the project design. A variety of design elements exist that
will minimize the impacts on water quality.
At a smaller scale, decisions of individual homeowners can also impact stormwater
quality. As part of the stormwater education and outreach campaign, Marana will
distribute brochures to residents (see Section 4.3). One part of these brochures will be
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information on design of landscaping, irrigation, and other outdoor projects to minimize
stormwater pollution impacts.
8.3.5 Measurable Goals
V.B.5.e.v Include in the SWMP an identification of the measurable goals for the
post-construction runoff control program.
The measurable goals for each post-construction stormwater management control can be
found in Table Five: Post-Construction Stormwater Management in New
Development and Redevelopment Measures and Milestones (found on page 100).
8.3.6 Implementation Schedule
V.B.5.e.vi Include in the SWMP dates, in terms of months and years, by which the
permittee will achieve specific measurable goals.
The dates by which each measurable goal will be achieved are specified in Table Five:
Post-Construction Stormwater Management in New Development and
Redevelopment Measures and Milestones (found on page 100).
8.3.7 Staff
V.B.5.e.vii Include in the SWMP the name(s) and title(s) of the person(s) responsible
for the development, implementation, and enforcement of post-
construction stormwater management.
Town of Marana staff members will draft any necessary ordinance or enforcement policy.
The Town Manager and Town Council will review and adopt as necessary. Staff
members will develop inspection procedures and forms. Town personnel will manage
public education.
99
8.4 Measurable Goals and Implementation
The BMPs, and measurable goals by which they will be implemented, are outlined in the
following Table. Also included is the implementation schedule and references to the
relevant ADEQ requirements.
Table Five: Post-Construction Stormwater Management Measures and Milestones
Reference BMP Measurable Goal Target Date
V.B.5.a 1. Staff will continue to a. Review all grading permit applications a. Ongoing
V.B.5.b require grading plans according to the Pima County Stormwater
V.B.5.e be consistent with any Detention/ Retention Manual and the 2000
relevant local Revised Development Requirements for
stormwater control Drainage in Northern Marana.
guidelines.
V.B.5.a 2. Staff will develop, if a. Identify whether current Town Code a. Dec. 2006
V.B.5.c necessary, an ordinance adequately addresses post-construction
V.B.5.e or other regulatory stormwater management.
mechanism to address
post-construction b. Outline any necessary additions to b.Feb.2007
stormwater existing Town Code if applicable.
management.
c. Draft new Code provisions. c. July 2007
d. Submit draft Code for legal and d. Sept. 2007
technical review.
e. Submit Code for approval by Town e. Oct. 2007
Council.
f. Once new provisions are approved, f. Nov. 2007
begin implementing them. Ordinance
approval and implementation will be done
in accordance with the public notice
requirements of the State of Arizona
.R.S. 39.204 and 9.812).
V.B.5.a 3. Staff will notify the a. Identify and inventory existing post- a. Oct/Nov
V.B.5.d parties that are construction stormwater control features. 2005, ongoing
V.B.5.e responsible for the
maintenance of b. Determine the party responsible for b. Dec 2005,
retention basins or maintenance of each feature. For the most ongoing
other stormwater part, this will be the homeowner's
control features. association (HOA) for the development in
which the feature exists.
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A$-
c. Notify each responsible party annually
of their obligation to maintain the
features. c. Dec. 2004,
ongoing
V.B.5.a 4. Staff will respond to a. Continue to respond to citizen reports. a. Ongoing
V.B.5.d citizen reports Currently, the grading and/or floodplain
V.B.5.e regarding improper or permit reviewer responds to each citizen
inadequate stormwater report by first inspecting the problem area.
control feature Documentation of each citizen report is
maintenance and kept on file in the Environmental
related drainage issues. Division.
b. Notify residents using the stormwater b. Begin Mar.
brochures and website of the Town's 2004, ongoing
contact for drainage or stormwater
concern reports.
c. Record date and description of concern, c. Begin Apr.
location of documentation, and type of 2003, ongoing
action taken to address problem in the
stormwater program database.
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9 POLLUTION PREVENTION/ GOOD HOUSEKEEPING
FOR MUNICIPAL OPERATIONS
Municipalities have an obligation to serve as a model for the regulated community by
operating in a manner that reduces or eliminates the discharge of pollutants in urban
runoff and stormwater. Municipalities can contribute a significant amount of pollutants
to stormwater through the maintenance and operation of parks, open space, landscaping,
municipally-owned vehicles, public streets and roadways. Beyond the importance of
setting a good example within the community, pollution prevention and good
housekeeping efforts can save the municipality money over time. Preventing trash and
other debris from entering the storm sewer system can reduce damage to system
components and lower repair and maintenance cost.
9.1 AZPDES Requirements and Guidelines
The regulatory requirement for pollution prevention/ good housekeeping for municipal
operations is that regulated MS4s:
VB.6.a Develop and implement an operation and maintenance program that
includes a training component and has the ultimate goal ofpreventing or
reducing pollutant runoff ftom municipal operations due to activities,
including but not limited to, park and open space maintenance, fleet and
building maintenance, new construction and land disturbances, and
stormwater system maintenance. The perm ittee shall address the following
topics in the program:
i. Maintenance activities, maintenance schedules, and long-term
inspection procedures for controls to reduce floatables and other
pollutants to the small MS4;
ii. Controls to reduce or eliminate the discharge of pollutants ftom
streets, roads, highways, municipal parking lots, maintenance and
storage yards, waste transfer stations, fleet or maintenance shops with
outdoor storage areas, and salt and sand storage locations and snow
disposal areas; and
iii. Procedures to properly dispose of waste removedftom the small MS4
and municipal operations, including dredge spoil, accumulated
sediments, floatables, and other debris.
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AZPDES regulations require that a permittee's SWMP include the following information:
AZPDES requirement V.B.6.b
i. A list of the municipal operations impacted by this operation and maintenance
program;
ii. A description of the trainingprogramfor municipal employees;
iii. A list of measurable goalsfor the municipal pollution,prevention program;
iv. Dates, in terms of months and years, by which the permittee will achieve specific
measurable goals; and
V. The name(s) and title(s) of the person(s) responsible for implementing and
coordinating employee training andpollution prevention activities.
9.2 Efforts to Date
Currently the Town of Marana has several procedures in place for managing municipal
operations to reduce stormwater pollution. These operations include timely maintenance
of the municipal vehicle fleet, street sweeping, park maintenance, waste reduction, and
discharge reduction. Work request and work order forms are contained in Appendix E.
These forms will be updated periodically as necessary.
9.2.1 Fleet Maintenance
The Town currently employs service technicians to service Town vehicles on a mileage
maintenance schedule as well as on an as-needed basis. This helps to prevent vehicles
from leaking fluids and to identify leaks early.
Fleet maintenance operations occur at the Town of Marana Operations Center. The newer
facility provides service technicians with an indoor area to maintain the Town vehicle
fleet. All large equipment and Water Department vehicles are kept at this site, which also
provides refueling services for Town vehicles. There are two additional refueling sites
used to fuel Town vehicles within the Town limits; however these facilities are owned
and maintained by Pima County.
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Potential spill areas are equipped with adequate containment systems. Vehicles are
parked on A concave concrete slab during refueling to contain any accidental fuel spills.
The Town of Marana vehicle maintenance building has collection and filtering systems in
place where vehicles are maintained and washed.
To date, there have been no spill-related accidents within the vehicle maintenance
division. In the event of a spill, however, staff is properly trained to handle the situation.
Smaller vehicles in the Town fleet, such as cars, are taken to commercial car washes.
Police cars are the responsibility of the officers to whom they are assigned. Maintenance
and operations personnel wash large equipment at the Marana Operations Center, which
has oil separators installed on site. Any wash water that can potentially be discharged to
the system, is free of oils and grease. Maintenance personnel will be instructed to use
biodegradable soaps whenever possible.
9.2.2 Street Maintenance
The Public Works Department is responsible for items in the Town of Marana Rights-of-
Way (ROW). Objects that enter the ROW that are not permitted or propose a hazard or
threat to human welfare or the environment are addressed as soon as the department is
aware of its presence. The presence of non-hazardous debris, trash, or other material in
the ROW is reported to a Municipal Operations staff member who responds to the report
within a single business day. The debris is removed and taken to the local landfill for
disposal.
Interstate-10 interchanges are maintained -on a regular basis by inmate cleaning crews.
The inmates work daily to clean up interchanges within the Town limits, completing
maintenance of a single interchange within a week to a week and a half. The inmates are
responsible for mowing, weeding, trimming trees, cleaning up trash and debris, and
removing animal manure.
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9.2.3 Monthly Street Sweeping
The Town of Marana currently contracts out for the monthly sweeping of all Town
streets. The contractor hired to conduct the street clean up employs a sweeper that passes
PM- 10. Once the Town Council has passed a resolution accepting maintenance
responsibility for new roads, the Operations and Maintenance supervisor is notified and
the roads are added to the street sweeping list.
9.2.4 Park Maintenance
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The parks will be inspected daily for the purpose of identifying and correcting any
problems. General maintenances activities include the following:
A. Hard-court Surfaces: All hard-court surfaces including basketball, tennis and
skate parks will be inspected daily. Conditions of the surfaces that require repair
will be noted and scheduled for maintenance/ repairs as soon as resources are
available. Sidewalks and roads shall be swept or blown free of any debris after
each mowing and additionally as needed.
B. Parking Lots: Litter shall be removed from all parking lots daily. In the event of
excess debris, a blower and/or vacuum will be utilized.
C. Litter and trash: Litter and trash shall be collected and disposed of daily, (seven
days a week), and prior to mowing of turf areas. 4W
D. Playgrounds: Playgrounds shall be inspected daily for safety and cleanliness.
Maintenance needs shall be noted and repairs made immediately.
E. General Maintenance: Benches, picnic tables, bicycle racks, trash receptacles and
any other park amenities shall be inspected for damage and repairs immediately if
necessary.
The turf areas at Town parks are maintained using the following procedures.
A. Turf Management and Maintenance: Bermuda grass and Winter Rye grass turf
shall be maintained in accordance with accepted practices.
B. Lighting System: Routine bulb testing and replacement shall be conducted on an
ongoing basis to ensure safety and visibility.
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C. Fences: Fences shall be inspected regularly for repairs or replacement. Breakages
or failure in fencing or gates shall be corrected immediately upon their discovery.
D. Structures: Structures under control of the Parks department shall be checked and
cleaned daily. Minor repairs to plumbing, electrical and furnishings shall be made
as soon as possible by the Parks crew. These structures include Community
Center, restrooms, concession areas, dugouts, pool areas and all ramadas.
E. Weed Control: Weeds shall be controlled only on an as needed basis and with
spot application methods with an appropriate herbicide and in accordance with
manufacturer's guidelines. Occasional hand weeding may be performed if it is
determined the most effective.
Turf maintenance includes mowing and application of fertilizers, herbicides, and
pesticides. FerTous sulfate is applied every other month to lower the pH of the soil to
between 6.5 and 7.0. Once the pH is stabilized spraying of iron may be reduced. Mowing
intervals will vary depending upon weather but generally will be once a week during non-
peak growing and twice a week during growing seasons. Aeration of turf takes place in
late March or early April for re-growth of Bermuda grass and late September prior to
over-seeding. Over-seeding with perennial rye grass occurs between September 20th and
October 20th, depending on current weather conditions. Herbicides are used only on a
spot-application basis. All lawn chemicals are applied in minimal amounts and in such a
way as to reduce the likelihood of significantly contaminating storrnwater runoff.
The Parks and Recreation Department utilizes a programmable system to control
irrigation length and timing. This system is equipped with sensors that will turn off the
irrigation system in the event of rain, thus reducing the likelihood of water runoff from
irrigated areas. The Department is in the process of upgrading this system to one that
provides better control of watering cycles. This new system connects to an electric main
valve at each park. In the event of a break in the irrigation line, the system will shut down
the necessary valve automatically in order to stop the leak.
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In 2000, the park personnel began implementing low water maintenance at the park. They
are using native vegetation, such as mesquite, to landscape. This in turn lowers the
amount of water that might leave the parks as runoff. In any non-recreation areas of the
park, grass is being removed and replaced by drip-irrigated landscaping. These areas
comprise approximately 35% of the park. Lawn areas in the park are watered for 30
minutes at night, five days of the week. If additional watering is needed, this is done
under staff supervision during the day.
During the summer months when the pool is in operation, the Town of Marana hires staff
to manage the pool activities. Pima County Health Department requires at least one of the
persons that work at the pool to have a pool operator certification. Pool operators are
trained to deal with water leaks and hazardous materials contamination. The Town stores
these certifications, and others such as the landscaping certification, on file within the
Marana Recreation Department.
9.2.5 Stormwater Runoff System Maintenance
The Town of Marana Stormwater Runoff Systems is comprised of some curb and gutter
infrastructure, drainage channels, catch basins, and detention/retention basins. The
drainage channels in the compliance area are inspected and bladed once a year to clear
out debris or other potential blockages.
9.2.6 Land Disturbance on Town Property
For municipal construction projects, the contractor hired for the project is required to
submit their Stormwater Pollution Prevention Plan (SWPPP) to the Town as an assurance
am
of the adequacy of their stormwater runoff controls. These.projects are then inspected by
either in-house building inspectors or private consultants. The inspectors make sure that
the project is being constructed to plan and that the Stormwater Pollution, Prevention Plan
(SWPPP) is being implemented.
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9.2.7 Containment of Potential Pollutants
The street maintenance crew uses herbicides to control noxious or invasive plant species
within Town Rigbts-of-Way. The Town of Marana utilizes biodegradable substances
where possible. The herbicides used include chemicals with differing modes of action
such as defoliants, soil sterilizers, and pre-emergents. The chemicals are stored in large
sealed plastic drums set in spill packs. Any spills that may occur during handling will be
caught in the spill packs and prevented from contact with bare ground or pervious
surfaces.
9.2..8 Waste Disposal
Waste materials generated or collected by the street maintenance crew, fleet maintenance,
or parks maintenance, such as motor oil, trash, or other debris, are disposed of properly
depending upon the materials. Oils, used oil filters, and similar materials are collected,
contained, and disposed of according to law.
9.3 Action Plan for Pollution Preventionl Good Housekeeping for
Municipal Operations
The Town of Marana's action plan for control of stormwater runoff from Municipal
Operations is as follows. The format is structured according to the AZPDES guidelines
provided by ADEQ.
93.1 Impacted Municipal Operations
V.B.6b.i Include in the SWMP a list of the municipal operations impacted by this
operation and maintenance program.
Fleet maintenance
Street maintenance and street sweeping
Park maintenance
Municipal roadway and building construction projects
Waste disposal
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9.3.2 Training Program
V. B. 6. b. ii Include in the SWMP a description of the training program for municipal
employees.
Town employees responsible for implementing the stormwater program and ensuring
compliance with this plan will receive a minimum of 24 hours of annual continuing
education training on stormwater management issues. This training may involve
attendance at a stormwater training workshop or a required reading of stormwater-related
Department standard operating procedures and policies. All Town employees will receive
stormwater related outreach and education materials explaining ways to reduce waste,
proper disposal of trash (emphasizing waste reduction and recycling), and job-specific
BMPs where applicable.
This training will include information on how their everyday actions at home and at work
may or will affect the stormwater quality in our community. Informational materials will
include the location of the Town's ston-nwater library as well.
9.3.3 Measurable Goals
V. B. 6. b. iii Include in the SWMP a list of measurable goals for the municipal
pollution prevention program.
The measurable goals for each BMP related to Municipal Operations can be found in
Table Six: Pollution Prevention/ Good Housekeeping for Municipal Operations
Measures and Milestones (found on page I 11).
9.3.4 Implementation Schedule
VB.6b.iv Include in the SWMP dates, in terms of months and years, by which the
permittee will achieve specific measurable goals.
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The dates by which each measurable goal will be achieved are specified in Table Six:
Pollution Prevention/ Good Housekeeping for Municipal Operations Measures and
Milestones (found on page I 11).
9.3.5 Staff
V.B.6.b.v Include in the SWMP the name of the person(s) responsible for
implementing and coordinating employee training and pollution
prevention activities.
Staff members will review existing municipal operations and coordinate employee
training, which Municipal Operations or Human Resources personnel will implement.
Staff members responsible for implementing and coordinating training and public
reporting are listed in Table Seven, which is contained in Appendix A of this SWMP. In
the event that any of these individuals is no longer available to work on the project, a
replacement will be designated by the Town of Marana.
9.4 Measurable Goals and Implementadon
The following Table outlines the BMPs and measurable goals the Town will implement
to manage runoff from Municipal Operations. The table includes the implementation
schedule and references to the relevant AZPDES requirements.
Table Six: Pollution Prevention and Good Housekeeping for Municipal Operations -
Measures and Milestones
Reference BMP Measurable Goal Target Date
V.B.6.a 1. Staff will a. Develop a procedure to record data a.Feb.2004
V.B.6.b.iii improve record- on municipal operations and
V.B.6.b.iv keeping in maintenance procedures, including-
V.B.6.b.v regards to date, location of activity, description
municipal of activity performed, and assessment
maintenance of stormwater pollution prevention
and operations effectiveness.
procedures.
b. Develop a database for municipal b. May
III
.P.
maintenance and operations 2004,
information. ongoing
V.B.6.a 2. Develop and a. Review existing storage and a. Ongoing
V.B.6.b.iii implement handling procedures.
V.B.6.b.iv improved
chemical b. Research and develop an improved b. May
storage facilities set of procedures. 2004
and chemical
handling c. Implement new procedures. c. June 2004
procedures.
V.B.6.b.iii 3. Staff will a. Street sweeping - number of lane a. Sept 2005
V.B.6.b.iv manage runoff miles swept annually will be recorded
V.B.6.b.v from municipal in MS4 annual report.
maintenance
operations. b. Fleet maintenance records will be b. Ongoing
available for review upon request.
V.B.6.b.ii 4. Staff training. a. Staff responsible for a. Nov 2005
V.B.
6.b.iii implementation will develop and ongoing
.
V.B.6.b.v stormwater SWMP orientation beginning
training and annual stormwater BMP when
training for all staff. The annual report SVgvfP
will contain the dates and number of posted for
attendees of training seminars public
attended. comment
b. Staff responsible for b. Ongoing
implementation of the SWMP will
develop job specific stormwater BMP
training and educational materials for
maintenance personnel and
construction stormwater inspections.
Materials presented will be included in
annual report or available upon
I request.
112
wift
am
10 IMPLEMENTATION CONSIDERATIONS
The following sections address the implementation of plan elements including monitoring
compliance, updating the S)XW, and annual reporting.
10.1 Qualifying State or Local Program
The Town of Marana has developed new best management practices in response to the
need to apply for a municipal stormwater discharge permit. The Town is not aware of any
qualifying local or state programs that would adequately address the requirements of the
Small MS4 General Permit.
10.2 Sharing Responsibility
The Town of Marana will have sole responsibility to implement all measures within this
SWMP. The Town will not share responsibilities with other municipalities.
10.3 Reviewing and updating the SWMP
The Town of Marana will review the SWMP annually and make revisions as necessary.
Staff will evaluate the implementation status of the BMPs contained in the SWMP as
well as the effectiveness of each BMP. The Town will determine if the SWW needs to
be revised. If the SWMP requires modifications, the Town will notify ADEQ. The Town
will submit to ADEQ the proposed revisions with an explanation of why the changes
were needed, and what the Town expects to achieve by the changes in relation to the
goals of the best management practices.
If ADEQ requires the Town of Marana to make specific changes to the SWN4P, the Town
will adopt these changes within thirty (30) days and will certify to A.DEQ within sixty
(60) days that the changes have been made.
113
W.
10.4 Monitoring
r=-
The Town of Marana will evaluate program compliance, the appropriateness of identified
BMPs, and progress towards achieving identified measurable goals. The Town's separate
storm sewer system drains to the Santa Cruz River. At this time, a Total Maximum Daily
Load (TMDL) has not been established for this receiving water. The Santa Cruz River
through the Town of Marana is not listed on Arizona's 303(d) list, therefore the Town
will not sample and analyze discharge from the small MS4 at this time.
10. 5 Annual Reports
The Town of Marana will submit an annual report to ADEQ by September 30, 2004 for
the period of time between March 30, 2003 and June 30, 2004. Starting in 2005, the
Town will submit additional annual reports by September 30 of each year for the
preceding period of July I through June 30.
Each annual report will include:
1. The status of compliance with permit conditions, an assessment of the
appropriateness of the identified best management practices, progress towards
achieving the statutory goal of reducing the discharge of pollutants to the MEP,
protecting water quality, and the measurable goals for each of the minimum
control measures;
2. Results of information collected and analyzed, if any, during the reporting period,
including monitoring data used to assess the success of the program at reducing
the discharge of pollutants to the MEP;
3. Any changes made to the SWMP since the last annual report and a summary of
the stormwater activities the permittee plans to undertake during the next
reporting cycle (including an implementation schedule);
4. Proposed changes to the stormwater management program, including changes to
any BMPs or any identified measurable goals that apply to the program elements;
5. A description of BMPs to be implemented within new areas annexed over the past
year if the annexed areas are located within the regulated boundaries of the MS4;
114
LZ
6. A description and schedule for implementation of additional BMPs that may be
necessary, based on monitoring results, to ensure compliance with applicable
requirements; and
Notification if the permittee is relying on another government entity to satisfy
some of the permit obligations (if applicable).
115
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LEFT BLANK
116
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a"
References
Alameda Countywide Clean Water Program. (July 31, 2001). Draft Stormwater
management program, July 2001 - June 2008. Retrieved Oct 6, 2005 from:
http://www.cleanwaterprogram.org/ACCWP-SWQMP-all.pdf
American Public Works Association (APWA). (2000). Designing and Implementing an
Effective Storrnwater Management Plan.
Arizona Department of Environmental Quality,(ADEQ) (2004). Frequently asked
questions (faqs): permitting. Retrieved Sep. 20, 2005, from Arizona Department of
Environmental Quality Web site: http://www.azdeq.gov/web/Waterp.html#14.
Arizona Department of Environmental Quality. (Dec. 19, 2002jact sheet for the
Issuance of the AZPDES Small MS4 General Permit.
Center for Environmental Research and Service, Department of Biological and
Environmental Sciences, Troy State University. (May 2000). "How to" Guide for
Stormwater and Urban Watershed Management. Troy, Alabama.
Environmental Protection Agency (EPA). (2003). Clean Water Act. Retrieved Sep. 12,
2005 From EPA Web site: http://cfpub.epa.gov/npdes/cwa.cfm?prograry?_id=6.
EPA. (2003). Frequently Asked Questions (faqs). Retrieved Oct. 3, 2005 from EPA Web
site: http://cfpub.epa.gov/npdes/faqs.cfm?prograM_id=6#174.
Griffin International prepared for Town of Colchester. (March 2002). Town of Colchester
Municipal Stormwater Management Plan.
Marriott, Deborah, Bruce Sutherland, Janet Gillaspie, Carmel Kinsella Brown, P.E., et a].
(June 1998). Stormwater Toolbox for Maintenance Practices.
Center for Environmental Research and Service, Department of Biological and
Environmental Sciences, Troy State University. (May 2000). "How to" Guide for
Stormwater and Urban Watershed Management. Troy, Alabama.
Spellman, Frank R., Drinan, Joanne E., editors. (2003). Stormwater Discharge
Management. Government Institutes and ABS Consulting.
RW Beck (Consulting) for City of North. Bend. (January 2001). Comprehensive
Stormwater Management Plan (Draft).
Sanitation District No. I of Northern Kentucky. (June 2002). NPDES Phase 11 Storm
Water Management Plan.
117
A?
41?
Town of Marana. (1999). Town of Marana Stormwater Master Plan Tortolita Alternative
Formulation Report.
Town of Marana. (1998). Town of Marana Stormwater Master Plan Phase I Report.
US EPA. (1999). NPDES Final Rule: 64 Federal Register 68722 et seq. Retrieved
October 6, 2005 from: http://www.epa.gov/npdes/?egulations/phase2.pdf.
US Environmental Protection Agency (US EPA) Office of Water. (1995). NPDES Best
Management Practices Manual. Government Institutes, Inc.
US EPA. Office of Wastewater Management. (Sept 1992). EPA 832-R-92-005.
Stormwater Management for Construction Activities. Retrieved Jan. 31, 2001 from
http://www.epa.gov/owm/sw/conguide/index.htm
US EPA. Office of Water. (January 2000). Stormwater Phase 11 final Rule. Fact sheets
2.3 through 2.10.
Washington state Department of Ecology. (September 2002). Stormwater Management
for Eastern Washington: Model Municipal Stormwater Program.
Woodward-Clyde Consultants for Los Angeles County Department of Public Works.
(Sept 3, 1996). Critical Source Selection and Monitoring Report.
118
E. __
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APPENDIX A
P.- Town of Marana AZPDES Compliance Area Maps
P-
P-
0-
F.-
f-
V-
0-
[;.Q
P-
NOI Forms and Revisions
Table Seven - Responsible Individuals
F-
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on
on
oft
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Am
AN9
Pinal
Pima County
WAVRAVA?Y RD
? CORt
W
60
RD
0
0
W IRONWOOD HLL DR
Town of Marana
91MARANA17 NPDES Compliance Area Map
NPDES Compliance Area A-1 0 1 2
-==3
Marana Town Limits Will
4
N
W-10-E
S
M MARANA
AR
p
N LOCATION MAP N
-7 Southern Marana A
q MARA 7 NPDES Compliance
NPDES Compliance MArea
Area Map Marana Town Limits
4RIZOV4 0.25 0 0.25 0.5 0.75 1 Miles
A-2 011010
10/05 Town of
Arizona Department of Environmental Quality
ALL REQUESTED
F Surface Water Section / Permits Unit
I
INFORMATION MUST
I I 10 W. Washington, 5415A-1, Phoenix, Arizona 85007
B PI
BE PROVIDED ON
M
NOTICE OF INTENT (NOI) FOR COVERAGE
THIS FOR
under AZPDES Permit No. AZG2002-002 for
Discharges from Smafl MS4s to Waters of the United States
CHECK AS APPLICABLE: NEW NOI REVISED NOI Applicant is:
IF A REVISION, PROVIDE PRIOR AUTHORIZATION NO. Federal State
MS42002-21 V Other Phase If MS4
PERMITTEE (Agency Responsible for the Discharge)
Applicants Name: Town of Marana Phone: (520) 382-2600
Applicanfs Mailing Address: 11555 W. Civic Center Drive
City: Marana Zip Code: 85653
CONTACT PERSON
Name: -Keith Brann, P.E. Phone: (520) 382-2600
E-mail Address: kbrann@marana.com Fax: (520) 382-2641
Contact Person's Agency and Title: Town of Marana, Town Engineer
LOCATION INFORMATION
Name of Urbanized Area where the MS4 is located: Tucson Urbanized Area
Name of county(ies) where the MS4 is located: Pima County
Provide the following information on the approximate center of the MS4:
Latitude: 32- 25 53-- Longitude: Ill 9 25
Township- 111S Range: 12E Section: 31
Is any portion of the MS4 located in Indian Country? No V Yes_ If yes, name
Does any portion of the MS4 service a population within Indian Country? No f Yes -
If yes, how many people within the Indian Country are served by your MS4?
Name(s) of neighboring Tribes/Counties/Cities/Towns (places that share borders with the permittee):
City of Tucson Tortolita Mountain Park
Pima County
Town of Oro Valley
Pinal County
Saguaro National Park
Small MS4 Notice of Intent Page 1 of 2
A-3
WATERSHED INFORMATION
Name of Watershed: -Lower Santa Cruz River
Name of Receiving Water(s): Is the Receiving Water a 303(d) Impaired
Water?
Lower Santa Cruz River Yes No
Killitc, River Yes No
Brawley Wash Yes No
If any of the receiving waters are 303 (d)-listed Impaired Waters, you must compiete the Impaired Water
Information portion of this form.
IMPAIRED WATERS INFORMATION
If you indicated that any of the receiving waters to which you discharge are listed as a 303 (d) Impaired Water,
please answer the following questions.
Is there a Total Maximum Daily Load (TMDL) for the 303(d) Impaired Water?
Yes Proceed to Part A No Proceed to Part B
Part A. Does the TMDL prescribe a wasteload allocation to stormwater discharge from your MS4?
Yes Check the box below No Proceed to Part B
i certify that the SWMP identifies specific BMPs that will be used to meet wasteload allocations. I also
certify that I will monitor for pollutants for which my MS4 is assigned a wasteload allocation.
Part B. Check the box below if the MS4 has the potential to discharge the pollutants identified on the 303(d) list.
i certify that the description of the SWMP addresses specific BMPs for reducing the discharge of
303(d) -listed pollutants.
ADDITIONAL INFORMATION
This NOI must include the following attachments prepared as specified in Part III of the general permit.
,( _ A description of your Stormwater Management Program.
Has another governmental entity agreed to satisfy any of your permit obligations?
Yes If yes, check the boxes below No /
The agreement is explained in the description of your Stormwater Management Program.
Written documentation of your agreement is included as an attachment.
CERTIFICA71ON
This certification must be signed by the appropriate party as specified in this general permit Part VI.L.
"I cer* under penalty of law that this document and all attachments were prepared under my direction or
supervision in accordance with a system designed to assure that qualified personnel property gathered and
evaluated the information submitted. Based on my inquiry of the person or persons who manage the system or
those persons directly responsible for gathering the information, the information submitted is, to the best of my
knowledge and belief, true, accurate and complete. I am aware that there are significant penalties for submitting
Wse information, including the possibility of fine and imprisonment for knowing violations. In addition i certify that
the permittee will comply with all terms and conditions stipulated in General Permit No. AZG2002-002 issued by
the Director. "
Printed Name of Applicants Representative: Keith Brann, P.E. Title: Town Engineer
Signature of Applicant's Representative:
Small MS4 Notice of Intent Page 2 of 2
owl
ft?
A4
dL
Ll
0
Arizona DepartmeM of Environmental Quality
ALL REQUESTED Water Permits Section
INFORMATION MUST S 1110 W. Washington, 54158-3, Phoenbr, Arizona 8=7
?9A
BE PROVIDED ON
NOTICE OF INTENT (NOI) FOR COVERAGE
S
THIS FORM
under AZPDES Permft No. AZG2002-002 for
DbcftMw from Small NS4s to Waten of the United States
CHECK AS APPLICABLE: NEW NOI REVISED NOI Applicant is:
IF A REVISION, PROVIDE PRIOR AUTHORIZATION NO. . Federal - State
MS42002-21 V Other Ph8sOllMS4
PERMnrrEE (Agency Responsible for the Discharge)
Applicant's Name: Town Of Marana Phone: (520) 382-260()
Applicanrs Mailing Address.. 11555 W. Civic Center Drive
City: Marana Zip Code: 85653-7003
CONTACTIDERSON
Narne: Kevin Thorryton, P.E. Phone: (620) 382-2673
E-mail Address: kliomton@mamna.com Fax: (520) 382-2640
Contact Person's Agency and Title: Town of Marana, Assistant Director of Public Works
LOCATION INFORIIIIATION
Name of Urbanized Area where the MS4 is located: Tucson Urbanized Area
Name of county(iss) where the MS4 is located: Pima County
Provide the following information on the approxirnate center of the MS4:
Latitude: 32 - 25 53 .- Longitude: 111 9 25
Township: 11S Range: 12E Section: - 31
Is any portion of the MS4 located in Indian Country? No V Yes _ If yes, narne_
Does any portion of the MS4 service a population within Indian Country? No " yes
If yes, how many people within the Indian Country are served by your MS49.
Nan*s) of neighboring Tribes/CountieslCities(Towns (places that share borders with the permittee):
City of Tucson Tortolita Mountain Park
Pima County
Town of Oro Valley
Pinal County
Saguaro National Park
Small MS4 Notlice of hitent Page I of 2
A-5
#1 6 Am
WATERSHED INFORMATION MW
Name of Watershed: Lower Santa Cruz River
Name of Receiving Water(s): Is the Receiving Water a 303(d) Impaired
water?
Lower Santa Cruz River Yes No V
F;Ulft River Yes No V
BrawleyWash Yes No (
If any of the receiving walm are 303 (d)-lisded Impaired Waters, you must complete the Impaired Water
Inkmal portion of this fbrm.
IMPAIRED WATERS INFORMATION
If you indicated that any of the receiving waters to which you discharge are listed as a 303 (d) Impaired Water,
please answer the k0owing questions.
Is there a Total Maximum Daily Load (TMDL) for the 303(d) Impaired Water?
Yes Proceed to Part A No Proceed to Part B
Part A. Does the TMDL prescribe a wasteload allocation to stomwaftr discharge from your MS4?
Yes Check the box below No Proceed to Part B
I certify that the SWUP ideriffibs specific BMPs that wJ71 be used to meet wastaload allocadons. I also
cer* that I YWI mondor for pollutants for **och my MS4 is assigned a wasteked allocation.
Part S. Check the box below if the MS4 has the potential to discharge the pollutants identified on the 303(d) UsL
I car* that Me descriogm of Me SWUP addresses specific BMP:s for reduchV the dischaMe of
303(d),ifsted pollutants.
ADDITIONAL INFORMATION
This NOI must include the following attachments prepared as specified in Part III of the general permit
V A description of your Stormwater Management Program.
Has ano#w governmental entity agreed to satisfy any of your permit obligations?
Yes _ If yes, check the boxes below No V
The agreement is explained in the description of your Stormwater Management Program.
Written documentation of your agreement is included as an attachment.
CERTIFICATION
This certification must be signed by the appropriate party as specified in " general permit Part Vt. L.
'I car* under penalty of law that this document and all affechments were prepared under my direction Or
supervi,sion in accordenm with a system designed to assure that qualdbd personnel property gathered and
evaluated the information submitted. Based on my inquiry of the person orpersons vAo manage the system or
Uxxw persons dyactly reaWnible for gathering Me information, Me information submitted is, to the best of my
knowbdge and belief, true, accurate and complete. I am avere that there are swnblicant penefts for submitling
false information including Me possUdy of fine and imprisonment for knomng violatims In add*on I cw* that
the POMWOO Will COMpiy VAM all terms and cormhtions stipulated in General Permit No AZG2002-M issued by
the Dkoctor. 0 A% C) fj*? I-
Printed Name of Applicant's Representativi 7 7 Titie: 0, AOQVL -) r- P0 9W C
Signature of Applicants Representative: Date: SA 104
WOMEMONN? Ir 7 '
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*W.
4?
0-
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Small MS4 Modee, of Intent Page 2 of 2
A-6
0-
Arbmw Departinent of Environmental Quality
ALL REQUESTED Water Permits; Section
INFORMATION MUST 1110 W. Washington, 5415B.3, Phowbt, Admna 850a
BE PROVIDED ON NOTICE OF INTENT (NOI) FOR COVERAGE
THIS FORM
under AZPDES Permit No. AZG2002-W2 for
DischaMes ftm Snoff US4s to Mbftm of fhe Unked Smas
CHECK AS APPLICABLE: NEW NOI REVISED NOI Applicant is.-
IF A REVISION, PROVIDE PRIOR AUTHORIZATION NO. Federal _ State
MS42002-21 I" Oftr Phase 11 MS4
PEFWITTEE (Agency ResponsiMe fbr the Discharge)
Applicants Name: Town Of Mamn8 Phone: (520) 382-2600
Applicants MailingAddrees: 11MW. CMcCwftrDr., Bldg. A-2
City: Marana Zip Code: 85M
CONTACTPERSON
Name: Lisa M. Duncan Phone: (520) 382-26M
E-mail Address: lduncan@mamna.corn FWC (520)382-2640
Contact Person's Agency and ride: Town Of Mar8na, Environmental Planner
LOCATION INFORMATION
Nam of Urbanhwd Area where the MS4 is locgtad: Tucson Urbanbwd Area
Nam of county(iss) whom the MS4 is located: Pima County
Provide the following information on the appro)dmaie center of the MS4:
- Longitude: 111 9 - '25
Lefikide: 32 - 25 - 53
.
Township: 11S Range: 12E Section: 31
Is any portion of the MS4 located in Indian Country? No -L Yes - if Yes, name-
DOSS anY Portion of the MS4 service a population within Indian Country? No ?' Yes
If Yes, how many People within the Indian Country are served by your MS4?
Name(s) of neighboring TnbesjCWnbWC"qfTcwns (places tl & share borders with the permitbee):
City of Tucson Toftft Mountain Park
Pima County
Town of Oro Valley
Phal County
Saguaro National Park
Small M84 Notice of b"d
Pop I of 2
A-7
WATERSHED INFORMATION
Nam of Watershed: Lower Santa Cruz River
Nam of Receiving Water(s): is the Receiving Water a 303(d) Impaired
water?
Lov%w Santa Cruz River yes No V
R1111to River Yes No t
Brawley Wash Yes No -'
If any of the receiving watons are 303 (d)-listed Impaired Waters, you must compkto the Impelred Water
Information portion of thb form.
IMPAIRED WATERS INFORMATION
N you indicated that any of the receiving waters to which you discharge are listed as a 303 (d) Impaired Water,
please answer the following questions.
Is there a Total Maximum Deity Load (TMDL) for the 303(d) Impaired Water?
Yes Proceed to Part A No V Proceed to Part 8
Part A. Does the TMDL prescribe a wasteload allocabon to stormwater discharge from your MS4?
Yes - Check the box below No %f Proceed to Part B
I certify that the SWW identifts specft BMPs that will be used to meet wastabad affocaffons. I also
ow* that I wN monitor for pollutants for which my MS4 is ss*ned a wasteload allocaffon.
Part B. Check the box below 9 the MS4 has the potential to discharge the pollutants identified on the 303(d) lisL
I car * Met the description of the SWUP addre&ses specift BMPs for reducmg U* dbcharge of
303(d)4WW polUents.
ADDITIONAL INFORMATION
This NOI must include the following attachments prepared as specified in Part III of the goner al permiL
*f . A description of your Sbrmwater Management Program.
Has another governmental entity agreed to satisfy any of your permit obligations?
Yes _ If yes, check the boxes below No 4'
The agreement is explained in the description of your Stormwater Management Program.
Whtten documentation of your agreement is included as an attechmenL
CERTIFICATION
This certification must be signed by the appropriate party as specified in this general permit Part M-L
'I c&A* under penW of law that this document and all attachments were prepared under my dYK60n Or
supervision in accoidence w9h a system daWned to &=re that qualdliod personnel pippody gathered and
evaluated Me ffiftmation submitled Based an myInquiry of "person orpoisons who manage Me AY-qbm Or
dwse persons cffnwffy mWonsible for gaffierM ft albrmhon, Me kftmeflon submilled is to ft bed of my
ftnviedge, and befief, tam, accurate &W complete. I am swere OW Yom ate *nIkent P9178MISS for subiniffing
false MWmation, inchdal; Um possibility of fho and improonment for ftmw milatiOnS Inadditionica*ihat
the permillse wN amply with alf tenns and owdNow s*ubfed in GwwnW Permit No AZG2002-M owed by
ft D*vdor '
Printed Nam of Applicent's RepesenU&ve. LiSA Title: 15n-
Signature of Applicants Repiesentafive: DoW. %:2 ? a
Small US4 Notir of Intent Page 2 of 2
A-8
aw
MW
aw
ALL REQUESTED Arizona Department of Environmental Quality
Water Permits Section
INFORMATION MUST I 110 N. Washington, 541513-3, Phoenix, Arizona 85007
BE PROVIDED ON NOTICE OF INTENT (NOI) FOR COVERAGE
THIS FORM under AZPDES Permit No. AZG2002-002 for
Discharges ftom SmaY US& to Waters of the United States
CHECK AS APPILICABLE: NEW NOI REVISED NOI Applicant is:
IF A REVISION, PROVIDE PRIOR AUTHORIZATION NO. Federal State
Q'S"? !4q-k . -A Other'k bw n (SnhS 4)
PERMITTEE (Agency Responsible for the Discharge)
Applicant's Name: c\ Phone: (5j-6) )-q
Applicant's Mailing Address:
City: Zip Code:
CONTACTPERSON
Name: Phone:
E-mail Address: Fax: -D' 0
Contact Person's Agency and Title: Jkt, r
LOCATION INFORMATION
Name of Urbanized Area where the MS4 is located:. -k
Name of county(ies) where the MS.4 is located: P \' C t.
Provide the following information on the appro)dmate center of the MS4:
Latitude: 3 Longitude: N?\
Township: Range: Section:
Is any portion of the MS4 located in Indian Country? No Y?, Yes, If yes, name
Does any portion of the MS4 service a population within Indian Country? No )( Yes
If yes, how many people within the Indian County are served by your MS4?
Name(s) of neighboring Tribes/Counties/Cities/Towns (places that share borders with the perrnittee):
-,IrQ
-"\ C... Co
r\
--r7?r k -A i:?t C'
P
Small MS4 Notice of Intent Page I of 2
A-9
WATERSHED INFORMATION
Name of Watershed: Lx\ 2-c t\,
Name of Receiving Water(s): Is the Receiving Water a 303(d) Impaired
Water?
1?) Yes No
Yes No
Yes No
N any of the receiving waters are 303 (d)-listed Impaired Waters, you must complete the Impaired Water
Information portion of this form.
IMPAIRED WATERS INFORMATION
If you indicated that any of the receiving waters to which you discharge are listed as a 303 (d) Impaired Water,
please answer the following questions.
Is there a Total Maximum Daily Load (TMDL) for the 303(d) Impaired Water.?
Yes Proceed to Part A No Proceed to Part B
Part A. Does the TMDL prescribe a wasteload allocation to stormwater discharge from your MS4?
Yes Check the box below No Proceed to Part B
/ certify that the SWMP ldenfffies specffic BMPs that will be used to meet wasteload allocations. I also
cer* that / will monitor thr pollutants for which my MS4 is assigned a wasteload allocation.
Part B. Check the box below if the MS4 has the potential to discharge the pollutants identified on the 303(d) list.
I cer* that the description of the SWMP addresses specffic BMPs for reducing the discharge of
303(d)4isted pollutants.
ADDITIONAL INFORMATION
This NOI must include the following attachments prepared as specified in Part III of the.general peffnit.
A description of your Stormwater Management Program.
Has another governmental entity agreed to satisfy any of your permit obligations?
Yes If yes, check the boxes below No U----
The agreement is explained in the description of your Stormwater Management Program.
Written documentation of your agreement is included as an attachment
CERTIFICATION
This cerfification must be signed by the appropriate party as specified in this general permit Part VI.L.
"I car* underpenalty of law that this document and all attachments were prepared under my direction or
supervision in accordance with a system designed to assure that quaffied personnel properly gathered and
evaluated the information submitted. Based on my inquiry of the person or persons who manage the system or
those persons directly responsible tbr gathering the information, the information submitted is, to the best of my
knowledge and belief, true, accurate and complete. I am aware that there are significant penalties for submitting
false information, including the possibility of fine and imprisonment for knowing violations. In addition I cer* that
the permittee will comply with aft terms and conditions stipulated in General Permit No. AZG2002-002 issued by
the Director.'
Printed Name of Applicanfs Representative: 0 Yv-\ Title:
Signature of Applicanrs Representative: 7= Date:
Small MS4 Notice of Intent Page 2 of 2
A-10
Janet Napolitano
Governor
March 18, 2003
MIZONA DEPARTMEN-1-
OF
ENVIRONMENTAL QUALITY
1110 West Washington Street - Phoenix, Arizona 85007
(602) 771-2300 e www.adeq-state.az.us
Stephen A. Owens
Director
Farhad Moghimi
Public Works Director
Town of Marana
3696 W. Orange Grove Blvd.
Tucson, AZ 85719
Re: Arizona Pollutant Discharge Elimination System Permit for Municipal Stormwater
Discharges (SmaH MS4 General Permit)
Dear Mr. Moghimi:
We have received your Notice of Intent form (NOI) and Stormwater Management Program
(SWMP) for application to discharge under the Small MS4 General Permit (AZG2002-002). We
will review these documents and respond to you when review is complete. If ADEQ determines
that amendments to the SWMP are necessary, we will send you written notification as described
in Part V.E. of the permit. Please contact me at (602) 771-4449 if you have any questions about
stormwater permitting or the status of your SWMP review.
Sincerely,
Karyn Moldenhauer
Stormwater Project Manager
Surface Water Permits Unit
SVMU03:01 11
Northern Regional Office
1515 East Cedar Avenue - Suite F - Flagstaff, AZ 86004
(928) 779-0313 A-11
Phrited on rectickd paper
Southern Regional Office
400 West Congress Street - Suite 433 * Tucson, AZ 85701
(520) 628-6733
Table Seven - Table of Responsible Individuals
Town of Marana Staff Responsible for SWMP Implementation
Section & Responsibility Name Title Email Phone
6.3.10 - Manager,
7.3.7- Jennifer Environmental jchristelman (520)
8.3.7- draft/review Christelman Engineering @maranacom 382-
ordinances Division 2600
4.3.7 - Technical
Coordination
5.3.2.5 - Designated Contact
for Stormwater Program
5.3.3 - Comment review &
response
5.3.7 - Coordination and
implementation
6.3. 10- Coordination with
GIS, draft ordinances, Environmental clust@ (520)
schedule inspections Corby Lust Projects marana.com 382-
7.3.7 - Develop inspection Coordinator 2600
procedures, draft ordinances,
response to public reporting
8.3.7- Develop procedures,
coordinate training, draft
ordinances
9.3.5 - Coordinate
Municipal Operations
procedures, training,
reporting edures
4.3.7-
5.3.3-
5.3.7- Environmental (520)
8.3.7- Corby Lust Projects clust 382-
9.3.5- Coordinator @maranacom 2628
Administrative coordinator
& initial public contact
6.3. 10 - perform inspections
4.3.7 - Administrative/ Debbie Pickard Document dpickard@ (520)
document files Coordinator maranacom 382-
2600
6.2.2 Dennis Dolan Emergency ddolan (520)
9.2 (2)- Spill response Response- @,maranacom 382-
Municipal 2500
Operations
0"
A-12
APPENDIX B
Illicit Discharge Detection and Elimination Procedures
Dry Weather Outfall Inspection Checklist
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Draft - Illicit Discharge Detection and Elimination Procedures
Town of Marana Stormwater Management Program
An illicit discharge is any discharge (or seepage) to a municipal separate storm sewer
system (MS4) that is not composed entirely of stormwater or uncontaminated
groundwater. The following non-stormwater discharges are allowable, provided they
are not identified as significant contributors of pollutants to or from the IVIS4:
Allowable Non-Stormwater Discharges
Water line-flushing
Landscape irrigation
Diverted stream flows
Rising groundwater
Un-contaminated groundwater infiltration
Un-contaminated pumped groundwater
Discharges from potable water sources
Foundation drains
Air conditioning condensation
Irrigation water
Springs
Water from crawl space pumps
Footing drains
Lawn watering
Individual residential car washing
Flow from riparian habitats and wetlands
De-chlorinated swimming pool discharges
Street wash water
Discharges from emergency fire fighting activities
NPDES or AZPDES permitted discharges (such as the effluent from the Ina Rd
Treatment Plant)
The following discharges may qualify for permit coverage under the AZPDES de
Minimus General Permit:
1 . Discharge associated with the operation of potable water systems;
2. Discharge associated with water well construction, maintenance, rehabilitation
and development or water supply or quality investigations
3. Discharges associated with structural integrity (hydrostatic) testing of new
pipelines, pipelines associated with the installation and maintenance of sewer or
reclaimed water transport systems.
4. Discharges of groundwater, surface water or potable water associated with the
testing of certain pipes tanks, or vessels that have been previously used to
transport oil and gas
Town of Marana Outfall Inspection Procedures
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5. Discharges from reclaimed water systems
6. Discharges associated with subterranean dewatering
7. Discharge of residential non-contact cooling water
8. Discharge of building and/ or street wash water when only biodegradable soaps
and/or water are used
9. Discharges from charitable noncommercial car washes when only the exterior of
the vehicles are being washed with biodegradable soaps and/or water
10. Discharges for drainage from swimming pools
Note: Mobile car washes are not eligible and this permit does not cover releases from
pipeline breaks or other spills.
Dry Weather Field Screenin-g of Ouffalls
Dry weather field screening will be conducted at all outfalls in the 5-year permit term.
The Town of Marana has identified 296 outfall structures within the stormwater
compliance area at present. This total consists of 233 spillways, 48 pipes, 10 dips, 4
inlets, and 1 "other". During the 2nd through 5 th years of the first permit term, 25% or
approximately 76 structures will be inspected annually to detect and eliminate illicit
discharges to the Town of Marana's Municipal Separate Storm Sewer System. The
following discussion presents the recommended outfall inspection procedures and
schedule. These procedures and schedule may be amended as necessary to more
efficiently address illicit discharges within the Town of Marana compliance area.
Ouffall screening is not to be conducted within 72 hours following a rain event of 0.1
inches or greater. Inspectors will obtain necessary safety equipment and implement
appropriate safety procedures in accessing outfall locations. Inspectors will familiarize
themselves with outfall locations and with the operation of all field equipment prior to
field inspection. In addition, inspectors will ensure all field test equipment is in proper
working order prior to field inspection.
Screenina Inspection Schedule
For scheduling purposes, five main inspection areas within the Town of Marana's
compliance area are identified by Township, Range, and Section.
'W.
These inspection areas are identified as:
1. East-Southeast inspection area currently includes outfalls in
Township, Range, and Sections (TRS): T12S R13E sections 31 and
32, T13S R13E sections 5, 6, and 8
11. South-Southwest inspection area currently includes ouffalls in TRS:
T13S R12E Sections 1 and 2
Ill. Central-North inspection area currently includes outfalls in TRS: T1 2S
R12E Sections 25, 26, 35 and 36
IV. West inspection area currently includes outfalls in TRS:
Town of Marana Outfall Inspection Procedures 2
B-2
T12S R12E Sections 27-29, 33 and 34
V. Northwest inspection area currently includes outfalls in TRS:
T12S R12E Sections 16-17, and 20-22
The division of the main inspection areas is consistent with a desire to initially prioritize
outfall areas in commercial and industrial areas. The designations also allow for
encompassing inspections in areas that may be annexed in future development of the
Town of Marana.
Ouffall inspection will progress in a logical sequence beginning downstream and
progressing upstream within channel reaches. Inspections will begin with the the
outfalls within the East-Southeast area first. Land use in this area consists of older
commercial areas east of 1-10. These inspections will be followed by ouffalls in the
South-Southwest area, west of 1-10, which includes commercial and industrial land uses
adjacent to the 1-10 eastbound frontage road and in the Cortaro Rd. Silverbell corridor.
The third set of inspections will consist of the Central-North area outfalls west of 1-10,
that contain addifional commercial development north of Cortaro Rd., a golf course, and
residential land uses. The West area outfalls consist mainly of residential land uses,
schools and golf course, and will be scheduled for the fourth phase of inspections.
Outfall screenings in the Northwest area, west of 1-10, that serve school and residential
areas, are scheduled for the last screening inspection phase.
Citizen Complaints
Illicit discharge and dumping complaints will be recorded and investigated within 48-
hours. Corresponding outfalls will be identified and the dry weather field screening of
outfalls procedures will be followed. If required, proper notifications will be made under
the State Emergency Response Program. Customers will receive a response and be
kept updated of progress on resolving the complaint. These responses and customer
interactions will be properly documented in the incident file.
Inspection
The inspector will complete the Ouffall Field Screening Report for each outfall. The
assigned structure ID and Photo ID number from the May 2004 inventory will be noted
on the form. A current photo will be taken to document changes at the ouffall.
Upstream land use and weather conditions will be recorded.
A visual observation of the outfall will record the presence or absence of water during
dry weather. Presence of foam, oil sheen, trash, and/or floatable materials, presence of
bacterial sheen or slimes, staining of banks, outfall structure, and/or vegetation,
excessive vegetative growth and odor will also be recorded. In the presence of water,
the flow rate and water clarity and color will be recorded by visual inspection. A
description of the outfall structure and condition must be provided. Structural damage
will be noted for action and re-inspection.
Town of Marana Outfall Inspection Procedures
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W
If flowing water is present, the inspector will determine whether it is appropriate to utilize
a 'stormwater test kit' to field test for ph (7.0 is neutral, elevated levels are <6.5 and >
8), copper (possible sources include automobiles, industrial, architectural, some
pesticides), chlorine, surfactants (detergents) and phenols (chemicals contained in
disinfectants such as household cleaners and if found should be relatively close to
source). The sample shall be taken at the point of discharge (not in stream) and
recorded on the Field Sample Record. Two samples within 24-hours will be collected,
with a minimum of 4 hours between samples.
If the field test indicates presence of contamination (elevated levels at 0.2 mgA or
greater), a grab sample shall be obtained and submitted to an analytical lab under
proper chain of command procedures. Parameters for lab testing will vary and are
dependent upon visual observations. If water is black, oily, and/or greasy or smells like
gasoline, the flow should be analyzed for TPH and BTEX If the water is gray and
smells like sewage, the discharge should be analyzed for E. coli.
Notify appropriate agencies within 24 hours when any type of significant illicit discharge
is found that has the potential to seriously affect water quality, designated uses, or
public health:
Northwest Fire Department: 911
Arizona Department of Environmental Quality
Southern Regional Office: 628-6724
Elimination
The inspector will follow the discharge upstream to determine the source if flowing or
ponded water is present. If the source can be determined and has the potential to be a
source of pollutants, as evidenced by field or laboratory testing, the discharge should be
considered illicit and action should be taken to notify the PRPs to eliminate the
discharge within 15 days of the detection.
The inspector shall notify the responsible party verbally and follow-up with written
notification within 1 week (or following receipt of lab results).
The written notification shall include a copy of the inspection report, and a request for
action to be taken and a scheduled time limit to initiate the action. If the responsible
party does not respond and/or comply with the schedule, staff may conduct a site
inspection and will investigate existing legal authority to obtain compliance. A summary
of relevant existing Town of Marana Code is appended to this document.
All responsible parties for sources of dry weather flow will be given public outreach
materials as they are available or updated. If the source of a dry weather flow cannot
be determined and test results indicate the presence of a pollutant, the inspector shall
0.
Town of Marana Outfall Inspection Procedures 4
B-4
report findings to the Environmental Manager for further investigation on a case-by-case
basis.
If visual inspection does not indicate the presence of water, however signs of possible
illicit discharges (floatable materials, staining, bacterial slimes, excessive growth, or
odor) is evident, the ouffall will be re-inspected periodically to monitor changes in
physical parameters.
The presence of trash indicating illegal dumping activity will be noted for possible
signage.
Reporting-
In addition to field screening reports and sampling records, all corrective and elimination
actions will be documented. A Database will hold all records of reporting and inspection
activities, and link the activity to the ouffall number. Annual reporting will address the
number of illicit discharges found, the number eliminated, timeliness of elimination and
legal authority utilized, if applicable.
Signage
In an effort to prevent illicit discharges and illegal dumping, the Town of Marana will
apply storm drain markers or stencil ouffalls, and illegal dumping signs will be installed
within the compliance area. The following installation procedure will be implemented:
Prior to outfall field screening, the inspector will review existing complaint records
for illegal dumping in the quadrant under review and inspect these areas while in
the field in addition to locating new outfall locations.
In the field, the inspector will record the presence or absence of illegal dumping
during field screening of outfall locations and known areas of dumping, and
record any existing "No dumping" and "Report Illegal Dumping" signs as
accurately as possible, utilizing GPS equipment, if available.
If signs of dumping exist, the inspector will report the dumping to the
Environmental Manager who will notify the appropriate party or department for
remediation. If no sign exists, recommendation for placement of an illegal
dumping sign will be forwarded to the Traffic Department. Signs shall be
installed in areas which have no dumping but have had 2 or more complaints of
dumping activity during the previous year.
Storm drain markers will be applied at all storm drains. The storm drain markers
will be placed at the inlets to the outfalls, where appropriate. The inspector will
recommend locations for markers at his/her discretion and coordinate with the
Environmental Manager for placement of the markers within legal locations.
Town of Marana Outfall Inspection Procedures
B-5
Where appropriate, stormwater outfalls will be stenciled rather than applying
markers.
Date and location of placement of new signs, marker application, or stenciling will
be recorded. The number of identified existing signs, and number of new signs
installed will be tabulated on a yearly basis for annual reporting to ADEQ.
a-
L:zi
Town of Marana Outfall Inspection Procedures 6
B-6 M?
APPENDIX A
Marana Town Code
Marana's Town Code includes regulations that pertain to illicit discharge prevention.
The relevant sections of Code are as follows:
Chapter 7: Buildin-q
Waste disposal (Section 7-5-2)
"Sewerage systems and/or septic tank systems shall be constructed in
accordance with the standards of the Arizona Department of Health
Services and the Pima County Health Department, with compliance with
such standards to be certified by the appropriate state or county agency or
the town engineer."
Chat)ter 10: Health and Sanitation
Dumping and Transportation of Garbage or Aggregate Material
(Article 10-1)
A. "it shall be illegal to transport garbage, refuse, aggregate material or
like material within the town limits in an open vehicle unless the
material is in a closed container or in an enclosed cargo area."
C. "No vehicle shall be driven or moved on any roadway within the town
limits unless the vehicle is so constructed or loaded as to prevent any
of its load from dropping, shifting, leaking, or otherwise escaping
therefrom, except that sand may be dropped for the purpose of
securing traction, or water or other substances may be sprinkled on a
roadway in cleaning or maintaining the roadway."
Illegal dumping (Section 10-1-3)
A. "person who dumps, deposits, places, throws or leaves refuse, rubbish,
debris, filthy or odiferous objects, substances, or other trash on any town
road, public thoroughfare, public airport, the right-of-way to a town road,
Town of Marana Outfall Inspection Procedures 7
B-7
0?
public thoroughfare or public airport within twenty (20) yards of a town
road, public thoroughfare or public airport is guilty of a class three (3)
misdemeanor."
B. "The governing body of the town shall cause signs to be erected at
suitable intervals on roadways, public thoroughfares, public airports, and
rights-of-way within the town limits, including public parks, informing the
public that is unlawful to commit the acts prohibited by this section."
F. "The town manager shall enforce the provisions of section 10-1-3 by
prosecuting violators in the Marana Municipal Court pursuant to the
provisions of the code. If such prosecution fails to secure compliance
with the provisions of said sections, or in the event of inability to
prosecute violators by reason of failure to secure jurisdiction over their
persons, the manager shall compel the removal of litter by the
procedure outlined in article 10-2 of the Marana Town Code."
Litter on private premises or public place (Section 10-2-2)
"No person shall dump, throw or deposit litter on any public place or
private premises within the town, whether owned by such person or not,
except that the owner or person in control of private premises may
maintain authorized private receptacles for refuse in such a manner that
litter will be prevented from being carried or deposited by the elements
upon any public place."
Owner to maintain premises (Section 10-2-3)
"The owner or person in control of any private premises shall at all times
maintain the premises free of litter, provided that this section shall not
prohibit the storage of refuse in suitable containers."
Notice to remove (Section 10-2-5)
"To compel the removal of litter through the provisions of this article, if a
person owning or controlling any private premises fails, neglects or
Town of Marana Outfall Inspection Procedures 8
B-8
MW
refuses to remove or properly dispose of lifter located on private premises
owned on controlled by such person, he or she shall be given written
notice by the manager to remove all litter from such private premises
within thirty days from the date set on the notice for compliance..."
Removal by town (Section 10-2-8)
"When any person to whom a notice to remove has been given, and on or
before the date of compliance on the notice or within such further time as
may have been granted by the council on appeal, fails, neglects or refuses
to move from such private premises any or all litter, the manager is
authorized and directed to cause same to be removed and disposed of at
the expense of the owner or person controlling such private premises..."
Sewage Sludge - Residential areas (Article 10-3-1)
"The use of land within the town that is within one-quarter mile of a human
residence that is also within the town for the application of or injection of
sewage sludge to the surface or within eight inches of the surface shall be
prohibited, except where said residence is owned by the owner of the land
where sludge is to be applied or injected or where written waiver has been
obtained from the resident or owner of the residence and where said
waiver has been filed with the town clerk."
Sewage Sludge - Flood plain areas (Article 10-3-2)
"The use of land within the designated flood plain of the Santa Cruz River
as defined by the town zoning ordinance or development code for the
application of or injection of sewage sludge within eight inches of the
surface shall be prohibited."
Sewage Sludge - Other areas (Article 10-3-3)
Town of Marana Outfall Inspection Procedures 9
B-9
awl
"The use of any other land within the town for the application of or injection
of sewage sludge to the surface or within eight inches of the surface shall
be in accordance with standards and regulations of the United States
Environmental Protection Agency, the Arizona Department of Health
Services and the Pima County Health Department..."
Travel Reduction Code - Purpose (Section 10-4-1)
7he purpose of this article, recognizing that motor vehicles are the single
greatest contributor to air pollution, is to improve air quality and reduce
traffic congestion within the incorporated and incorporated areas of Pima
County by increasing alternate mode usage and reducing overall motor
vehicle travel for commute trips This article shall establish a basis for
cooperative effort of the local jurisdictions to achieve a uniform program
for reduction of work related trips by employees working for major
employers subject to this regulation."
AM
Requirements for employers (Section 10-4-5)
"in each year of the regional program each major employer shall:
1. Provide each regular employee with information on alternative mode
options and travel reduction measures including, but not limited to:
Sun Tran bus routes and schedules, the RideShare program, and
bicycle routes. This information will also be provided to new
employees at the time of hiring ... "
Chapter 14: Water
Service lines, valves and meter (Section 14-3-6)
"...The customer's lines or piping must be installed in such a manner as to
prevent cross-connection or backfiow."
Escaping water (Section 14-10-3)
Town of Marana Outfall Inspection Procedures 10
B-10
"No person shall allow water to escape from his or her premises upon
public property, such as alleys, roads or streets, nor upon any other
person's property."
1996 Spa/Pool Code
The Pima County 1996 Spa/Pool Code was adopted by the Town of Marana, with
amendment. Discharges from pools and spas are regulating under this code according
to the following provisions:
Waste Water Disposal (Sections 314, 415, 508, 616, 714, and 815)
"Backwash water shall be disposed of and contained on site. All
discharges of backwash water shall comply with applicable Pima County
ordinances and Arizona Department of Environmental Quality (ADEQ)
Engineering bulletins..."
Town of Marana Land Development Code
The Town of Marana's Land Development Code regulates a wide range of actions that
would result in illicit discharges into the storm drainage system or would otherwise
negatively impact surface waters. The relevant sections of Code are as follows:
Title 5: Zoning
Zone D - Designated Flood Plain Zone (Reference 05.02.04)
A. "Within Zone D no residential land use shall be permitted, nor shall
any commercial, industrial, or quasi-public use be permitted that entails
the accommodation of persons overnight or the storage of materials or
equipment for more than 24 hours if such materials or equipment
would become hazardous to human health and safety upon exposure
to water, or if such materials or equipment would result in a hazardous
contamination of the Santa Cruz River or Brawley Wash..."
B. "No construction or excavation that will alter the natural drainage
pattern, direction or rate of flow, or the carrying capacity of the Santa
Town of Marana Outfall Inspection Procedures
B-11
M.-
Cruz River or the Brawley Wash can be performed unless previously
approved by the Town Council after recommendation from the
Planning Commission."
N?
Drainage of Surface Waters (Reference 05.05.04)
"No surface water shall be allowed to drain from any lot onto any adjacent
lot except upon written agreement between the owners of said lots"
Pollution Prohibited (Reference 05.02.05)
"No land use shall be permitted which emits or discharges liquids or solid
material on the soil or into surface or ground waters in amounts which
result in pollutants entering any water or drainage system in amounts
exceeding the standards prescribed by those Pima County; Arizona (sic),
or federal agencies having appropriate jurisdiction."
Recreational Vehicle (Reference 05. 10. 10) spw?
H.11. "All parks and subdivisions shall have refuse collection areas
approved by the Planning Administrator..." -Ow
Resort and Recreation Zone (Reference 05.11.07)
0. "Each property shall provide adequate and accessible trash
disposal areas..."
Light Industrial (Reference 05.12.02) ow
1.7 "All outdoor trash and refuse storage areas shall be enclosed..."
Heavy Industry (Reference 05.12.03)
H.8 "All outdoor trash and refuse storage areas ... shall be enclosed..." Now
Title 8: Building Code
Drainage of Lots (Requirement 08.03.03)
0-
Town of Marana Outfall Inspection Procedures 12
B-12
"Surface water shall not be allowed to drain from any lot onto any adjacent
lot, parcel, or easement except upon written agreement with the owner of
said adjacent lot, parcel, or easement."
Waste Disposal (Requirement 08.03.09)
"Sewerage systems and/or septic tanks shall be constructed in
accordance with the standards of the Arizona Department of Health
Services and the Pima County Health Department..."
Title 11: Prohibition of Illegal and Nuisance Uses
"The purpose of this section is to promote the health, safety, economic,
aesthetic, and general welfare of the citizens of the Town of Marana ... by
establishing requirements for the maintenance of all land..."
Nuisances Prohibited (Requirement 11.02)
B. "No person shall compost or permit the composting of organic waste;
manure; tree, grass, or shrub clippings; grease; bio-solids, or other
similar material on any property within the Town of Marana limits
except for composted material that is used directly on the property
from which it is composted."
D. "No person shall allow a grease pond or open grease storage facility
to be maintained on any property within the Town of Marana limits."
Title 17: Environmental Resource Preservation, Native Plant Protection,
Landscape Requirements
Protected Ridges, Protected Peaks, Riparian Areas, Wildlife Corridors and
Areas of Significant Vegetation (Section 17-1-1)
D. "All areas determined to include riparian or wildlife linkages and
corridors shall be protected and remain undisturbed throughout the
course of development and shall be fenced-off during construction."
Town of Marana Outfall Inspection Procedures 13
B-13
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Landscape Requirements: Intent and Objectives (Section 17-3-2)
"This chapter will utilize landscaping to achieve the following goals and
objectives...
a. helping control and utilize storm water runoff...
f. control soil erosion..."
Title 21: Flood Plain Erosion Hazard Management Code
Short Title (Reference 21.01)
B.3. "The Town will acquire by appropriate means, and whenever possible,
lands within the regulatory floodway, floodway fringe and erosion hazard
areas. These lands are to be managed to preserve or enhance natural
values and expressed resource management goals."
B.5. "Natural flood areas, streams, washes, arroyos, rivers, and drainage
courses are, whenever possible, to be preserved in their natural 4W-
riverine environment. Any land use proposal which proposes this
approach will be considered superior to all others."
C. "it is the purpose of this Code to protect the public health, peace,
safety, comfort, convenience and general welfare of the citizens of
the Town of Marana by adopting regulations designed:
1. To minimize flood and erosion damage and reduce the heights
of floods...
2. To prevent unwise encroachment and building development
within areas subject to flooding ... [and] erosion, and to assure
that the flood carrying capacity within the aftered and/or
relocated portion of any watercourse is maintained."
Floodway Requirements (Reference 21.08)
B. I. "Extraction of sand, gravel, and other materials is allowed within the 40-
floodways and flood hazard areas provided that excavations are not
so located nor of such a depth, or width, or length, or combination of
depth-width-length as to present a hazard to structures.... to the
Town of Marana Outfall Inspection Procedures 14
B-14
banks of watercourses, to other property, or which adversely affects
groundwater recharge."
B.2. "There shall be no stockpiling within the floodways and flood hazard
areas of materials or tailings that may obstruct, divert, or retard the flow
of floodwaters except as reviewed and approved by the Town Floodplain
Administrator on an individual Floodplain Use Permit basis."
B.3. "Excavations may be allowed only in those reaches of water courses
which have, at a minimum, a balanced sediment system, i.e. the
sediment coming into the reach is equal to or greater than the
sediment leaving the reach and the long term sediment balance for
the river system indicates that the stream channel will aggrade."
B.4. "Due to the rapidly changing hydraulic characteristics of
watercourses in the Town of MaTana, and the effects excavations
have on these characteristics, Floodplain Use Permits for
excavations shall only be renewed for a limited time period, not to
exceed one (1) year, subject to annual renewal upon review by the
Town Floodplain Administrator."
B.5. "in addition to those conditions provided for elsewhere, floodplain
use permits for excavations may impose conditions regarding the
area and location in which excavations are allowed, the maximum
amount of material to be excavated, and other reasonable restraints
on the methods of operating, including time restraints."
B.6. "Any extraction of sand and gravel or related materials in a floodway
or flood hazard area will only be allowed after the effective date of
this Code if a reclamation plan is also provided for the extraction
operation. The reclamation plan shall show in sufficient detail the
actions which are proposed to reclaim the excavated areas so that all
adverse effects of extraction are mitigated."
C. "No use shall be allowed which:
1. Acting alone or in combination with existing or future uses
creates a danger or hazard to life or property...
Town of Marana Outfall Inspection Procedures 15
B-15
4. Increases erosion potential upstream and/or downstream.
5. Places a waste disposal system wholly or partially in a floodway.
Floodway Fringe Area Requirements (Reference 21.09)
B.1.a. uAny fill proposed to be deposited in the floodway fringe must be
shown to have some beneficial purpose and the amount thereof not
greater than is necessary to achieve that purpose, as demonstrated
by a plan submitted by the owner showing the uses to which the
filled land will be put and the final dimensions of the proposed fill or
other materials."
B.1.b. "Such fill or other materials shall be protected against erosion by
riprap, vegetative cover, bulkheading, or other approved methods."
B.3.a. "The storage and/or processing of materials that are buoyant,
flammable, explosive or that could be injurious to human, animal, or
plant life in time of flooding is prohibited."
B.4.a. uAll new and replacement water supply, treatment, and sewage
collection and disposal systems built in a regulatory floodplain shall
be designed to eliminate to the degree physically possible, in
accordance with Arizona Department of Environmental Quality
guidelines, infiltration of floodwaters into these systems and
discharge from these systems into flood waters."
BA.b. "On-site sanitary waste disposal systems shall be located to avoid
impairment to them or contamination from them during flooding."
B.6. "in order to minimize erosion and sedimentation in the run off from
the Tortilita mountains, native vegetation shall not be removed from
that part of the Town of Marana East of 1-10 except where the Town
Engineer has approved the methods to control erosion,
sedimentation, flow and related factors..."
Town of Marana Outfall Inspection Procedures 16
B-16 owl
outfall Inspection Report
Date:
Time:
Structure ID #
Complaint # NIA
New Photo Taken:
Existing signage:
Yes No
No If Yes: Photo ID #
,Siqn r!qua%e
- - ------- - -- - - ---------------- -
Upstream Landuse: Fci;il Industrial Undeveloped
Weather:
Tempemture_---:F
Raining: Sunny
Yes I Cloudy
No
mminent
outfall Description
Structure Culvert 'Pipe: Basin: Spillway
imensions): *Estimate if
---- - ---------- -
Visual Observations
---------------
----------- Culvert------
Concrete
;-metal
PVC
------------ ------------------------- ----- --: Detention--
Retention
lined:
--- -- - ------- - -------- ----- ---
::Yes
No
Structural Damage:
Description of Damage:
lovAng Water Present:
Ponded Water:
es:
;:No
-- - -----------
JNo ;No
stimate Flow
'Velocity:
. . ..... -------------- - --
---- - -
!,Medium (Sand
Light size parfir-Ae
::(Suspended silt, clay movement in
I& small sand size) suspendledload)
---------- - - - --- - ------ --- - ---------- -
_
eavy (Bed load
movement - rocks,
gravel)
- -----
: Yes !!If Yes, Please answer the fol(o]?ii-4--
_
Odor of Discharge: ?!Sewage Sullfi7de Rancid or Sour Oil or Gas
',Other Odor:
Color of Discharge: ie "Yellow Brown Green Gray
::Other:
Turbidity: None :C11oudy Opaque
Aoatables: _111CA17 ?himn Trash
Other:
Deposit or Staining: None [Sediment Oily 10ther:
Vegetation: Normi71_ 1 Excessive Deficient Deformed
Weeds Native Vegetation 1 Other. -------
-
Trash: es I Wo ___-- ---ry
pe-
Samples taken: [Vis- No If "Yes":
Town of Marana Illicit Dis?e Ouffall Inspection Report
B-17
1
gfti.- Outfall Inspection Report
S i ?id am'-p -Ie-: --- ---
INo mplina Method:
iMethod:
- - - - ------------------------------ - -- -- - ---- - ----
Resutts:
-- - ---------- -------- -----
-------------------------------- - - -----
Town of Marana Illicit Discharge Outfall Inspection Report
B-18
mol
W.
4?
Town of Marana Project Name:
COMMUNITY RESPONSE TRACKING REPORT Date:
Name: Home Phone:
Street Address: E-mail:
City/State/Zip: Fax #:
Employer if Relevant: Work Phone:
Employers Address: Type of Business:
Nature of Comment & Complete Detail:
Location of Stonnwater Issue:
Name/Dept. of Taking Report:
LOWER SECTION FOR TOWN OF MARANA USE ONLY
For Response Referred To: Contact Citizen ASAP and
Record dates of all contacts
Response Required-By Date:
FTown of Marana Research and Resolution:
Response to Citizen:
Further Action Suggested:
Reaction by Citizen:
File Auth: Dept: Date:
B-19
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p-
APPENDIX C
0- Citizen Concern Procedures
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Notice of Violation Letters (NOV)
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MARANA
?Zl?z I '11-?
TOWN OF MARANA
PLAINNING AND ZOMLNG DEP
CODE ENFORCEMENT PROCESS FOR CITIZEN
DATE:
Purpose and Intent:
To establish a process in which to address a citizens complaint a
with all ap licable code requirements in a timely manner.
I p
Policy:
When a citizen's complaint is received by or referred to the ?
Officer it must be responded to in a timely manner, typically i
The appropriate documentation and research must be done to
exists and to insure c9mpliance when a violation is found as d
procedure.
Definitions:
N/A
Procedure:
When a complaint is received by a citizen or as a referral by
evaluation will be made at that time to determine whether it
jurisdiction of the Town of Marana's Land Development Code (
referred to another department. If it is determined to be a valid v
file will be opened through Code Trak our computerized tracldng
is given its own Gase number. All actions taken such as site i
written notices, court actions, and any other case related activit3
C-1
SOP:
insure compliance
Code Compliance
two business davs.
nine if a violation
?d in the following
tother department an
;rould fall under the
whether it should be
ing complaint, a case
,stem. Each new case
pections, verbal and
vill be entered under
that case number. First action would be to locate and contact the property owner and /or
tenant and inform them either with a verbal or a written notice describing the violation
aLong with the specific code reference. If no action-to correct the violation occurs within a
reasonable period of time, typically (7) daA the legal process will begiv. Three written
notices must be issued before any legal action can be taken. The hispector must send a
first, second and third notice certified with return receipt requested. After each notice is
sent they are given a time period to comply, typically (7) to (14) days. If the violation has
been resolved within that notification process time period, the case will be closed. If that
process has been completed, and the violation still exists, the case will then be turn ed
over to the Town Attorney and the court process will begin. A citation may be issued, and
civil or criminal penalties may be imposed by the magistrate for each day the violation
continues to exist.
Authorized by:
C-2
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MARAN;K
TOWN OF MARANA
Development Services - Planninc; and Zoning,
Zoning Code Enforcement
3696 West Orange Grove Road
Tucson, AZ 85741
(520) 297-2920
CERTIFIED MAIL NO. <Mai1No>>
RETURN RECEIPT REQUESTED
<?Date))
oCornpany>>
<<-Addressl))
vCity>>, <(State)) <<PostalCode>>
FIRST NOTICE OF T170LA TION
It has come to our attention that the property located at <d1ropertyAddress>> is reported to
be in violation of the- Town of Marana Code, oCodeArticleViolated)) in regard to the
following.
((ViolationA))
(<ViolationB)>
For questions, please contact me at (520) 297-2920 to discuss this matter. Ifwe do not
receive a response from you within seven (7) days of your receipt of this letter, a re-
inspection of the reported violation will be conducted and legal proceedings, if required,
0
will commence.
Thank you for your cooperation in this matter.
Sincerely,
Holly Orloff
Zoning Code Compliance Officer
C-3
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MARANA
::??z I \1-1,
TOVM OF MAJLANA
Development Services - Planning and Zoning
Zoning Code Enforcement
3696 West Orange Grove Road
Tucson, AZ 85741
(520) 297-2920
CERTIFIED MAEL NO. <<N1aihNo>>
RETURN RECEIPT REQUESTED
<<TodaysDate)>
<(CompanyName)>
(<Addressl)>
<(Citp), ((State)> <<PostalCode>>
SECOND NOYTCE OF V70LA TION
You were contacted 'on (<FirstContactDate>> in regard to violation(s) of the Toxm.of
Marana's Codes specifically stated, which is/are <(CodeAxficleViolated>> <(ViolationA>>
<(ViolationB>>
To date there has been little, if any, progress that has been made to mitigale said
violation(s). It is our policy to attempt to work with and assist citiz= 'in correc-Un-C,
violations prior to pursuing legal
, . remedies. You are hereby required to remove and-or
eliminate the violation(s) on your properry within 14 days of receipt of this
Enforcement action was initiated with the first letter that was given to you daied
oFirstContactDate)).
Please do not hesitate to contact me at (520) 297-2920 if you have any questions
regardina this matter.
Sincerely,
Holly Orloff
Zoning, Code CojmpIiance Officer
C-4
OW
Development Services - PI no and Zoning
Zoning Code Enfo i-cement
MARA 3696 West Orange G rove Road
Tucson, AZ 8-5 741
(520) 297-29 20
TOWN OF MARANA
1
0. <MailNo>)
CERTIFEED MAELN
RETURNTRECEIPT REQUESTED
<<TodaysDate))
oCompany))
((Addressl))
<(City)), <<State>> <<PostalCode>>
MAL NO Y-TCE OF PTOLA TION
You were notified on two previous occasions, by letters dated <<Fi rstViolationDate)) and
<<SecondViolationDate>), which specified the violation(s) of the Tow n Code.
The code -,riolation(s) is/are as follows:
<<Violationk)) <<Violation]3))
Failure on your part to remove and/or eliminate the violation(s) of I he Towm C ode within
14 days of receipt of this letter shall result in a citation being, issued to you for the
violatiofi(s) noted and requiring you to appear in court to answ er the charges. Ci-.il
penalties range from $500.00 to $1,000.00 fines being imposed fo r each code violation
and a Eke amount for each day the violation(s) continue to existing after judgment by the
magistrate. Criminal penalties can be imposed for a 90-day period for each violation, and
a like period for each day the violation(s) continue to exist a fter judgment by the
magistrate.
It is the policy of the Town of Marana to resolve issues such as th ese prior to initiating
legal action. Therefore, it is in your best interest to contact our office and schedule a
meetine vrior to the end of this final notice period so that we may as sist you in complying
with the Town Code.
Please do not hisitate to contact me at (520) 297-2920 if
regarding this matter.
have any questions
Sincerely, C-5
Holly Orloff
Zoning, Code Compliance Officer
C-6
0-
P-
APPENDLX D
Town of Marana Land Development Code - Title 19
Grading Permit Applications and Checklists - Type I and Type II
Residential and Commercial Permit Checklists
Fonn A - Major Utility Installation Permit
Form B - Public Improvement Dedication to Town permit
Floodplain Use Permit
Flood Hazard Information Sheet
Elevation Certificate
Residential and Commercial Building Permit Applications
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TOWN OF MARANA, ARIZONA
LAND DEVELOPMENT CODE
TITLE 19
STA NDARDS FOR GRADING AND RELATED SITE WORK
SECTIONS:
19.010 Purpose and Interpretation
19.020 Applicability and Exemptions.
19.030 Definitions.
19.040 General Grading and Related Site Work Perforrnance
Standards.
19.050 Submittal and Procedures: Type 1
19.060 Submittals and Procedures: Type 2
19.070 Inspection and Performance Defaults.
19.080 Enforcement and Penalties.
19.090 Waivers and Interpretation Review.
19.100 Illustrations.
HILLSIDE DEVELOPMENT
19.010 Purpose and Interpretation
A. Purpose
1 The purpose of this Title is to protect the public health, safety, general
welfare, and aesthetics by regulating grading and related site work
(including initial clearing, brushing or grubbing, subsequent excavating or
filling, and related site work) on pdvate and public land, including land
owned by the Town of Marana.
2. It establishes standards designed to:
a. Regulate the development of potentially hazardous terrain;
b. Conserve the general visual character of sites and settings;
C. Enhance the value of new development; and
d. Conserve the value of existing affected properties.
3. The guidelines and standards of this Title have been prepared in the
context of Town of Marana specific desert environment. They are intended
to complement the applicable provisions of development code and other
Town ordinances.
4. Granting of a permit for grading and related site work shall not relieve the
applicant of responsibilities to other jurisdictions.
B. Interpretation.
1 . This section shall be used as a guide whenever a conflict arises in the
interpretation or enforcement of this Title. The design, implementation, and
mitigation of grading and related site work regulated by this Title (19) shall
be reviewed by the Town of Marana staff prior to the issuance of any permit
to ensure compliance with the guidelines of this Title and the specific
standards and requirements of this Title.
Titic 19 - Standards for Cwading & Rdated Site Work
RFVISF-DO1/97 PAG TM F 22
TOWN OF MARANA, ARIZONA
LAND DEVELOPMENT CODE
2. The design and implementation of all grading and related site work shall;
a. Minimize scars and other adverse visual impacts resulting from cut
and fill;
b. Blend with the natural contours of the land;
C. Conserve the natural scenic beauty and vegetation of the site, and;
d. Restrict the area and volumes to the minimum necessary to
implement the planned development.
3. In all projects, measures shall be taken to:
a. Ensure that graded hillside, slopes, or other areas subject to
erosion are stabilized;
b. Reduce the erosion effects of stormwater discharge, preserve the
floodway-carrying capacity of natural or constructed waterways by
limiting soil loss, and protect drainways from siltation;
C. Minimize dust pollution and surface water drainage from graded
areas during grading and development; and
d. Ensure that development activity is designated and implemented to
minimize adverse impacts and include appropriate restorative
measures.
19.020 Applicability and Exemptions.
A. Scope
1 All development projects shall require either a Type 1 or a Type 2 grading
permit, except as exempted in subsection D of this section.
2. Town development projects shall abide by the requirements of this Title.
The Town Council may grant a special exception at a public hearing to a
requirement of this Title for a Town development project.
B. Type 1 permit applicability: A Type 1 permit is required for
1 . Residential development on a single lot, with a development envelope not
exceeding the following:
Lot Area Development Envelor>e
0.5 to 5.0 acres (21,780 to 217,800 sq.ft.) 12.000 sq. ft. plus 9.5% lot area
5.0 acres and more 15.0% lot area
2. Residential development on a single lot of less than one-half acre, with a
development envelope of more than twelve thousand square feet.
3. Non-residential development on less than 1.0 acre, or which does not
require a subdivision plat or development plan.
4. The clearing, brushing, or grubbing of an area within the limits given in (B)
(1) above.
Title 19 - Standards for Ckading & Related Site Work
PAG OF
REvism 01 /97
TOWN OF MARANA, ARIZONA
1AND DEVEI.)OPMENT CODE
5. Temporary off-site stockpiling of between one hundred cubic yards and ten
thousand cubic yards of fill.
6. Grading - except when reviewed during a golf course review, a floodplain
review, or a Type 2 grading permit review process - which requires a
permanent cut or fill slope greater than five feet in height and steeper than
a 3:1 slope.
7. New pavement of three thousand to five thousand square feet.
C. Type 2 permit applicability: A Type 2 permit is required for
1 . esidential development on a single lot with a development envelope
exceeding the following:
Lot Area Development Envelo
0.5 to 5.0 acres (21,780 to 217,800 sq. ft.) 12,00 sq. ft. plus 9.5% lot area
5.0 acres and more 15% lot area
2. Residential development which requires a subdivision plat or development
plan.
3. Non-residential development on one or more acres, or which requires a
subdivision plat or development plan
4. The clearing, brushing, or grubbing of an area exceeding the standards of
subsection (C)(1) above.
5. Temporary off-site stockpiling of more than ten thousand cubic yards of fill.
6. New pavement of more than five thousand square feet.
D. Exemptions: The following activities are exempted from this Title.
1 . Residential development on a single lot, with a development envelope of
less than fourteen thousand square feet.
2. One subsequent expansion, by not more than twenty-five percent, of an
exempted or approved Type 1 graded area.
I The clearing, brushing, or grubbing of an area of less than fourteen
thousand square feet.
4. Temporary off-site stockpiling of less than one hundred cubic yards ofill.
5. Resurfacing or maintenance of an existing paved surface.
6. New pavement of less than three thousand square feet.
7. Single-home sewage disposal system with a County Health Department
permit.
8. Excavation below finished grade for a basement, foundation, wall or
swimming pool authorized by a building permit.
9. Cemetery graves.
10. Refuse disposal site controlled by other regulations.
Title 19 - Standards for Grading & Related Site Work
PAGN SF 22
REVISFD 01 /97
TOWN OF MARANA, ARIZONA
LAND DEVELOPMENT CODE
11. Exploratory excavation under the direction of a soil engineer or engineering
geologist, provided all excavation is properly backfilled in 'accordance
with Town of Marana standards.
12. Qualified archaeological exploration of a registered archaeological site.
13. Removal of no more than 25 percent of the individual plants for storage and
replanting on the some property. This provision shall not exempt clearing,
brushing, or grubbing.
14. Underground utility installations under a paved roadway surface or a
continuously-maintained unpaved roadway surface and which provide no
disturbance of the surface.
15. Grading for the maintenance of an existing pdvate access, road or
driveway, provided that it either existed prior to adoption of, or was
established in conformance with, this Title. Proof of such may be required
by the Town of Marana.
16. Grading for an appurtenant access or utility easement.
17. Grading for normal agricultural practices on or within existing areas of
agricultural use.
18. Excavations for specific building foundations which are permitted by
issuance of a building permit.
19. Projects in the floodplain which are authodzed under a specific floodplain
permit.
19.030 Definitions.
A. General usage: The definition and usage of terms in this Title are as contained
within this code, except that the definition and usage of terms describing drainage
are as contained within the Marana Floodplain Management Ordinance.
B. Definitions: For purposes of this Title only, the following words and terms shall
mean:
1 Access road: A road within one mile of the grading site, designed on the
approved grading plan, and used, during grading, for the transport of
grading equipment, hauling of fill and other equivalent vehicular traffic to
and from the grading site.
2. Approval: Written notice by the Town of Marana staff approving the design,
progress or completion of work. A copy of which will be filed in the office of
the Panning and Zoning Administrator.
3. Approved plan: The most current grading plan which bears the authorized
signature of approval of the Town of Marana staff.
4. Approved testing agency: A facility which is equipped to perform and
certify the tests required by this Title and whose testing operations are
controlled and monitored by a Registered Civil Engineer.
5. Borrow: Earth material acquired from an off-site location for use in grading a
site.
Title 19 - Standards for Grading & Related Site Work
REVISED01/97 PGjf_W 22
TOWN OF MARANA, ARIZONA
1AND DEVELOPMENT CODE
6. Brushing: The selective removal of vegetation.
7. Building height contour line: A contour elevation line set at the existing
grade elevation, plus the maximum building height permitted by site
rezoning conditions of this code and fifty percent of the additional height
added by permitted fill. Referto illustration (19.100A.1).
8. Clearing: The substantial removal of vegetation.
9. Development Project: Any manmade change to improved or unimproved
real estate including but not limited to buildings or other structures, mining,
dredging, filling, grading, paving, and excavating.
10. Envelope, building:
a. A dwelling unit and all attached roofed structures, including carports
or patio ramadas;
b. For non-residential development, the building envelope shall be the
main building and all attached roofed structures.
11. Envelope, development: The total are encompassed by a continuous line
drawn a minimum distance of five (5) feet outside any and all work shown
on the approved plan and any other surfaces which will be disturbed (as
access roads). There shall be no more than one envelope per permit
unless such envelopes are separated by an undisturbed distance of at
least 100 feet.
12. Erosion: The wearing away of the ground surface as a result of the
movement of wind, water or ice.
13. Excavation: The artificial (e.g. mechanical, manual, blasting, etc.) removal
of earth materials.
14. Final inspection: Field inspection conducted by the Town of Marana prior
to project acceptance or release of assurances (if required).
15. Grade: The vertical location of the ground surface.
16. Grade, existing: The actual, current ground surface as of the date of
adoption of the ordinance adopting this Tibe.
17. Grade, finished: The final grade conforming to the approved grading plan.
18. Grade, rough: The stage at which grading substantially conforms with the
approved grading plan.
19. Grading: The initial clearing, brushing, or grubbing, and subsequent
excavating or filling, of a site.
20. Grading permit: An official document issued by the Town of Marana staff
authorizing the grading and related site work activity specified by the permit
conditions.
21. Grubbing: The removal of trees and other large plants by their roots.
22. Inspector: A person authorized by the Town of Marana to perform
inspection on grading or related site work.
Tide 19 - Standards for Grading & Rdated Site Work
PAGro-T 22
RFvism 01 /97
TOWN OF MARANA, ARIZONA
LAND DEVELOPMENT CODE
23. Permit conditions: The specificabons and requirements of the approved
grading plan, grading statement, soils report, or other documents
necessary for permit appmval.
24. Related site-work: Work other than general, or mass grading which
involves (1) below-the-surface operations (such as trenching for utilities or
landscaping); (2) placing of pavement and its substructure; (3) curbs,
gutters, and sidewalk; (4) grading of drainage channels; and (5)
constructing minor slope protection facilities and retaining walls.
25. Retaining wall: A wall designed to withstand lateral and hydrostatic
pressures and built to keep earth from sliding, and which is two feet or
greater in height from the lowest point of earth at the foundation to the top
of the wall.
26. Revegetation: Placement of living plant material on sites or cut and fill
slopes where the natunal vegetation has been removed.
27. Site: Any lot or parcel of land, or contiguous combination of lots and
parcels under the same ownership, or unified control, where grading or
related site work is to be performed.
28. Slope: An inclined ground surface, the inclination of which is expressed as
a ratio of horizontal distance to vertical distance.
29. Soil: Naturally occurring deposits overlying bedrock.
30. Stabilized slope: A slope treated with revegetation or other mitigation
measures approved by the Town of Marana that contribute to resistance to
erosion of siltation or to structural strength of the slope.
31. Temporary stock-piling: The storing of a quantity of material for not more
than 90 days. A revised period may be accepted by the Town Engineer, at
his discretion when the permit is issued, and shall determine the expiration
date.
19.040 General Grading and Related Site Work Perforrnance Standards.
A. Scope: The performance standards of this section are general grading and related
site work performance requirements. Illustrations (see 19.100) elaborate on
minimum perforTnance standards referenced by this section and may include non-
regulatory guidelines for superior grading performance.
B. Site revegetation and stabilization: All graded areas that have not been
revegetated, stabilized, or constructed upon at expiration of the permit shall be
subject to an additional fee and an amended permit and shall be revegetated or
stabilized within 60 days of the expiration date of the original permit.
C. Slopes: All exposed cut or fill slopes shall be revegetated or stabilized in
accordance with the approved grading plan.
D. Terracing: Terracing to control surface drainage and debris on cut or fill slopes
may be required.
E. Fill: Fill shall be compacted and soil-tested in accordance with Town of Marana
standards.
Tide 19 - Standards for Grading & Rclated Site Work
PAGtJ (
REWSED 01 /97 g22
TOWN OF MARANA, ARIZONA
LAND DEVELOPMENT CODE
F. Setbacks: The following minimum setbacks shall be increased by the Town staff if
considered necessary for safety or stability, or to prevent possible damage from
water, soil or debris:
1 Terraces: The width of a terrace shall be a minimum of six feet.
2. Buildings: Buildings shall be set back from the toe and crest of a slopes in
accordance with this Title, the Town of Marana building code, or the
approved soils reports, whichever is greatest.
3. Rights-of-way: The required setback of a slope toe adjacent to a public
right-of-way may be reduced with the approval of the Town of Marana staff,
if there Will be no adverse effect and:
a. Easements are not required; or
b. Retaining walls are used.
G. Building height: The finished grade and building pad shall be established so that
the maximum building height shall not exceed the building height contour lines.
H. Drainage control systems:
1 . Permanent control systems:
a. Erosion control shall be constructed and maintained to prevent
erosion of slopes, and cleared, brushed, grubbed, or graded areas,
in accordance with the approved grading plan and Town of Marana
standards.
b. Where cut slopes are not subject to erosion due to the erosion
resistant character of the native materials, erosion control may be
omitted upon approval by the Town of Marana.
C. Erosion control devices to prevent erosion or sediment deposition
on off-site property may be required,
d. The shoulders of a paved public or private roadway shall be
protected against erosion whenever curbing or constructed
spillways are not provided.
e. Surface drainage:
(1) Cut and fill slopes shall be provided with approved surface
drainage for stability and erosion protection of affected
properties.
(2) Approved surface drainage interceptors shall be provided at
the top of cut and fill slopes where there is surface runoff
and erosion potential.
(3) Approved drainage slopes to protect foundations shall be
provided.
f. Subsurface drainage: Subsurface drainage for stability and
protection of affected properties from ground water seepage may
be required by the Town of Marana staff.
Title 19 - Standards for Grading & Related Site Work
PAG13,f 22
REvism 01 /97
TOWN OF MARANA, ARIZONA
1AND DEVELOPMENT CODE
2. - Interim systems: Approved interim drainage control systems shall be
provided.
1. Import and export of earth and materials:
1 Loading of earth material shall occur only within the time limits of
subsection J of this section, and dust palliatives shall be applied as may be
required by the Town of Marana staff.
2. The transportation of earth material on public right-of-way shall be in a
manner that minimizes blowing soil and other hazards.
J. Hours of construction:
1 Construction equipment operation within one-half mile of an occupied
structure shall not be conducted between sunset and seven a.m.
2. Normal equipment maintenance involving lights, motors or generators, and
occurring within six hundred feet of an occupied structure, shall not be
conducted between nine p.m. and seven a.m.
3. Town of Marana staff may allow equipment operation or maintenance
during other hours if such operations are not detrimental to the health,
safety, or welfare of the inhabitants of the structure.
4. Permitted hours of operation or maintenance may be shortened by written
notice, if the Town staff finds a substantial adverse effect on the health,
safety, or welfare of the surrounding community.
K. Restrictions of vehicles:
1 No vehicles shall be driven over "natural open space areas", as designated
on the approved grading plan.
2. Points-of-entry to the site during construction shall be only as designated on
the approved grading plan.
3. For Type 2 permits, access roads to the site during construction shall be
only as designated on the approved grading plan.
L. Additional requirements:
1 During construction, and until revegetation or stabilization has taken place,
dust shall be minimized through application of approved dust controls as
may be required be Town of Marana staff.
2. Public rights-s-of-way, sidewalks, and other improvements shall be
maintained during construction in a neat and clean condition, free of loose
soil, construction debris, and trash.
3. Debris, fill, or equipment shall not be stored within a public right-of-way
without the written approval of the Town of Marana.
4. Cut or fill material in excess of that allowed by the permit shall be disposed
of in an approved manner.
M. Removal of native vegetation. In order to minimize erosion and sedimentation in
the run off from the Tortolita mountains, native vegetation shall not be removed
from that part of the Town of Marana East of 1-10 except where the Town Engineer
Tide 19 - Standards for Grading & Related Site Work
PAGF6 (f 22
REVISED 01 /97
TOWN OF MARANA, ARIZONA
LAND DEVELOPMENT CODE
has approved the methods to control erosion, sedimentation, flow and related
factors and their implementation is assured by a mutual consent agreement
between the Town and the applicant signed and guaranteed by cash or a bond
acceptable to the Town Attorney in an amount set by the Town Manager to
guarantee performance of the provisions of the mutual consent agreement (Ord.
91.19, 1991).
19.050 Submittal and Procedures: Type I
A. Scope: An application for a Type 1 permit requires a completed permit application,
grading plan, and grading statement. A survey sealed by a registered land
surveyor is not required.
B. Grading plan requirements:
1 . The existing and proposed finished grade of the area to be graded, based
on spot elevations or one-foot contour interval maps;
2. The extent of graded areas, shaded and labeled "graded area", and, where
structures are to be constructed:
a. The existing grade at-the primary building comers and proposed
finished floor elevations; and
b. The proposed building heights, shown to be within the building
height contour line;
3. The location of proposed mitigative measures, such as revegetation or
retaining walls;
4. The exterior boundaries of the site;
5. Access roads and points-of-entry to the construction site;
6. The grading envelope.
C. Grading statement A written grading statement shall be submitted with an
application for a permit. The Statement shall include, where applicable:
1 . A description of stabilization, erosion, and drainage control measures;
2. The off-site disposal location and estimated quantity of earth material and
vegetation to be removed from the site during construction;
3. Estimated starting and completion dates;
4. A description of the dust control method to be used during construction and
until revegetation or stabilization has been completed.
D. Documents preparation:
I . Documents shall be prepared in accordance with the requirements of this
Title and other Town of Marana standards.
2. Information shall conform to the specific plan, rezoning conditions (where
applicable), and other applicable regulations.
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TOWN OF MARANA, ARIZONA
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E. Application:
The permit application, grading plan, and other required materials shall be
submitted for review to the Town of Marana.
2. The permit application shall be completed and signed by the owner or
authorized representative.
3. Fees are payable to the Town of Marana in accordance with the fees
schedule adopted by the Town of Marana.
F. Application review:
1 The grading plan and statement shall be reviewed for consistency with
applicable regulations and standards, and if approved, a permit shall be
issued within five working days of application.
2. If determined inadequate, the application shall be returned within five
working days and the owner may resubmit, without additional fees, an
amended grading plan or statement.
3. If a second addftional submitted is required, it shall be accompanied by a
fee equal to one-half of the indial fee.
4. The Town of Marana shall require that plans and specifications be modified
to make them consistent with this code or other applicable regulations. A
permit may be issued with additional conditions.
G. Permit issuance and expiration:
Issuance: Permits are issued by the Town of Marana. A copy of the permit
and approved grading plan shall be kept in an easily accessible location on
the site.
2. Expiration: A permit shall be null and void if the authorized work has not
been completed within six months of permit issuance.
H. Permit extension and reapplication:
1 Extensions: Upon written request by the permit holder, the Town of Marana
may approve a single time extension of a permit for up to 90 days.
2. Reapplication: Reapplication for a permit may be made in accordance with
this Title.
Changes to permit:
1 Hazardous conditions: If drainage problems, flood hazards, or other
potential hazards become known that were not considered at the time the
permit was issued, the Town of Marana may require that engineering
modifications be submitted in a report and that the designed be modified.
2. Nonhazardous conditions: If unanticipated nonhazardous conditions are
encountered during construction and are beyond the scope of the permit,
the permit holder may submit the necessary engineering modifications in a
report to be reviewed and approved by the Town of Marana.
7-
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19.060 Submittals and Procedums: Type 2
A. Scope: An application for a Type 2 permit requires a completed permit application,
grading plan, grading statement, and soils report. Where applicable and not
otherwise submitted, drainage improvement plans shall be required also.
B. Grading plan requirements:
I The existing and proposed finished grade contours (except as amended in
subdivision 2 of this subsection) of the area to be graded, at a minimum of
two-foot contour intervals for slopes up to fifteen percent. Slopes over
fifteen percent shall be identified dearly and labeled.
2. The development envelope, showing the extent of graded area, shaded and
labeled "graded area", and, where structures are to be constructed:
a. Spot elevations may be shown for the finished grade within the
building envelope;
b. All building pads, showing the existing grade at the primary building
comer and proposed finished floor elevations; and
0. The proposed building height, shown to be within the building height
contour line.
3. The general topography for one hundred feet, or as specified by the Town of
Marana, outward from sites greater than five acres: The Town may
determine that such information is necessary for smaller sites.
4. A description of the mitigation methods, specifying elevations, dimensions,
qualibes and locations, to be used during grading and until revegetation or
stabilization has been completed.
5. The exterior boundaries of the site, the bases of bearing and a benchmark
to establish the vertical datum.
6. The extent and manner of preserving, relocating, clearing and disposing of
vegetation.
7. The final ground cover, revegetation (if any), erosion control and proposed
methods for cut or fill stabilization, based upon the soils report (refer to
subsection C of this section).
8. Access roads, haul routes, and points-of-entry to the construction site.
9. Where drainage improvement plans have not been submitted separately or
where interim drainage condftions exist because of project phasing, plans
for
a. Drainage or other protective devices to be constructed as part of the
grading;
b. The drainage area and estimated runoff of the area served by
drains.
10. A general description of potential paleontological, archaeological or
historical resources, and proposed mitigation measures; or a clearance
letter from a qualified archaeologist or archaeological institute.
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11. The off-site disposal location and estimated quantity of earth material to be
moved from the site dudng construction.
12. Estimated starting and completion dates for each construction phase. For
supedor project design and construction performance, it is encouraged that
the project designer prepare for project design use an existing site
inventory, identifying and quantifying vegetation, soils, on-and-off site view
shed constraints, slope analysis, and drainage.
C. Soil report:
1 . The report shall contain all geotechnical engineedng infonnation and
recommendations applicable to the project, and shall be sealed by the Soils
Engineer prior to submittal.
2. The Civil Engineer responsible for prepadng the grading plan shall
incorporate all report recommendations into the plan and statement.
3. Approved report recommendations shall become conditions of the permit.
D. Documents preparation:
1. Documents shall be prepared in accordance with the provisions of this Title
and standards of the Town of Marana.
2. Information shall conform with rezoning conditions and other applicable
regulations.
3. Grading plan preparation: The plan shall be prepared by, or under the
direction of, a Registered Civil Engineer.
E. Application:
1 . The permit application, grading plan, and other required matedals shall be
submitted to the Town of Marana for distribution to the applicable Town of
Marana review agencies.
2. When desired, a letter of request to exercise the inspection certification
option (refer to Section 19.070B) shall be submitted with the application.
3. The permit application shall be completed and signed by the owner or
authorized representative.
4. Fees are payable to the Town of Marana in accordance with the fees
schedule adopted by the Town.
5. At the discretion of the Town of Marana, assurances may be required in
accordance with Section 19.070E (Subdivision Standards).
F. Application review:
1 . Grading and related site work plans and related submittals shall be review
concurrent with the tentative plat or development plan review process for
the project.
2. Plans and reports shall be reviewed for consistency with applicable
regulations and standards, and with the approved rezoning site analysis (if
required). If determined inadequate, they shall be retumed within ten
woddng days.
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LAND DEVELOPMENT CODE-
3. Written review comments shall be provided to the applicant within twenty
worldng days of each submittal or resubmittal. Two submittals are covered
by the initial fee. An added fee of 50% is required with third submittal.
G. Preliminary grading:
1 . Preliminary grading approval: A preliminary grading permit for clearing,
brushing, grubbing, preliminary excavation, of filling may be issued in
special circumstances at the discretion of the Town of Marana while the
grading plan is being reviewed, provided:
a. The Town of Marana finds that the proposed grading is consistent
with this Title and code, the submitted grading plan, and the
approved tentative plat or reviewed development plan;
b. The Town of Marana finds that the proposed grading will not have
an adverse effect on the grading project and surrounding area;
C. Preliminary grading shall occur no less than twenty feet from the
boundaries of the development envelope, exclusive of approved
points-of-entry; and
d. Preliminary grading assurances have been provided in accordance
with subdivision 2 of this subsection.
2. Preliminary grading assurances;
a. When approval has been granted for preliminary grading, grading
assurances shall be posted in an amount not to exceed the
approved preliminary grading cost estimate made by a Registered
Civil Engineer.
b. The assurances shall be applied only to:
C. Eliminate potential hazardous conditions; or
(1) Mitigate the effects of dust, drainage, erosion, visual scars or
hazardous conditions, in accordance with the approved
designed.
(2) The assurances shall be released by the Town of Marana
when the preliminary grading has been inspected and
received the written approval of the Town of Marana. Final
approval of a permit shall not require the release of the
assurances in the event of preliminary grading
noncompliance.
H. Permit issuance and expiration:
1 Issuance: Permits shall be issued by the Town of Marana no earlier than at
the time of Town of Marana written staff approval of the tentative subdivision
plat or development plan. A copy of the approved permit with plan shall be
kept in an easily accessible location on the site.
2. Expiration: A permit shall be null and void if the authorized work has not
been completed within one year of permit issuance.
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TOWN OF MARANA, ARIZONA
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1. Permit extension and reapplication:
1 Extensions: Upon written request by the permit holder, the Town of Marana
may approve a single extension of a permit for up to 180 days.
2. Reapplication: Reapplication for a permit may be made in accordance with
this Title.
J. Changes to permit:
1 . Hazardous conditions: If drainage problems, flood hazards, or other
potential hazards became known that were not considered at the time the
permit was issued, the Town of Marana may require that engineering
modifications be submitted in a report and that the grading design be
modified.
2. Nonhazardous conditions: If unanticipated nonhazardous conditions are
encountered during constructions and are beyond the scope of the permit,
the permit holder may submit the necessary engineering modifications in a
report to be reviewed and approved by the Town of Marana.
19.070 Inspection and Performance Defaults.
A. General Inspections:
1 All construction which requires a permit shall be inspected by the Town of
Marana in accordance with the permit:
a. The inspection schedule shall be prepared in advance and approved
by the Town of Marana. Fees shall be based on the inspection
schedule and payable to the Town of Marana. Fees shall be based
on the Town of Marana in accordance with the fees schedule
adopted by the Town.
b. The permit holder shall request inspection at least two full working
days prior to the anticipated need.
2. If the Town of Marana finds site conditions are not a s stated in the
approved permit conditions, the Town of Marana may order work authorized
be the permit to stop until a revised grading plan has been approved.
3. Whenever grading work requiring Town of Marana inspection is concealed
by additional work without first having been inspected, the Town of Marana
may require, by written notice, that such work be:
a. Exposed, for inspection by the Town of Marana, or, at the option of
the Town of Marana,
b. Certified by the project Registered Civil Engineer as being in
conformance with applicable regulations.
B. Inspection certification option:
1 . Upon approval by the Town of Marana, the owner may retain a Civil
Engineer, registered to practice in the State of Arizona, to:
a. Perform the required construction inspection.
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b. Certify, upon completion, that the construction has been performed
and completed in accordance with the permit conditions, the
approved plans and specifications, and with applicable Town of
Marana standards,
2. The owner shall submit, in wiriting, to the Town of Marana, a request to
invoke this option. The request shall name the proposed Civil Engineer and
present his qualifications.
3. The Town of Marana reserves the right to either accept or deny the request.
4. If the request is to be granted, the owner and the engineer shall execute a
written agreement, on a from to be supplied by the Town, cleady
enumerating the responsibilities of all parties to the process.
5. The Civil Engineer shall make periodic reports to the Town as construction
progresses and shall maintain records for filing with the Town at completion.
6. The Town of Marana may periodically inspect the work and will monitor the
progress. The Town of Marana will conduct a final inspection upon
receiving notice of completion and will release all parties from the permit
only after all provisions of the permit and the agreement have been
complied with.
7. The owner, in receiving a permit for construction, shall guarantee all work
accomplished under the permit for a pedod of at least one year following
acceptance of the project and release of the permit.
C. Final inspection of rough grade:
1 All rough grading shall be completed in accordance -Mith the permit pdor to
final rough grade inspection by the Town of Marana.
2. The final inspection shall be conducted by the Town engineer prior to
issuance of a certificate of substantial conformance or release of
assurances (if required). The permit holder shall produce a minimum of
forty-eight hours' notice to the Town of Marana when any phase of rough
grading is ready for final inspection.
3. The Town of Marana may approve completed rough grading pdor to
completion of related work in cases of extreme hardship or where grading
has been designed to be completed in phases, provided that no hazards
exist and a performance bond has been posted to ensure completion of
remaining construction work of that phase.
4. The soils report and certification of substantial conformance shall be
submitted to the building official prior to issuance of a building permit.
D. Final inspection:
1 . All required construction work shall be completed in accordance with the
permit pirior to final inspection by the Town of Marana and issuance of a
certificate of final approval.
2. Where the conditions of a permit include the establishment of vegetation or
other final site work that extends beyond the expiration of the permit, the
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IAND DEVELOPN= CODE
Town of Marana shall make a post-construction inspection within six months
of permit expiration or as required by the permit.
E. Maintenance of revegetation:
1 . Maintenance of approved landscaping and revegetated graded areas shall
consist of regular watering , pruning, fertilizing, clearing of debris and
weeds, the removal and replacement of dead plants, and the repair and
replacement of irrigation systems and architectural features.
2. Maintenance assurances: The final approval of any subdivision plat or
development plan that includes an approved final landscaping plan shall
require covenants or assurances which:
a. Ensure the continued maintenance of required landscaping,
buffering and associated irrigation systems; and
b. Assign the responsibility of maintenance to the property owner of
agent, a homeowners' association or other liable entity.
F. Compliance: Town personnel, qualified in landscape archftectural review will
periodically spot-inspect landscape installations for compliance with this Title and
approved landscape plans.
19.080 Enforcement and Penalties.
A. Permit enforcement:
1 The enforcement of this Title and conditions of the permit shall be in
accordance with this section.
2. When the Town of Marana staff determines a non-compliance with the
conditions of the permit, the Town of Marana shall issue a stop-work order
and hold in abeyance, by written notice, the Town of Marana review of other
submittals related to the development project and the issuance of Town of
Marana permits for any aspect of the development project until remedial
actions have received the written approval of the Town of Marana staff.
B. Stop-work order:
1 . Whenever the Town of Marana deten-nines that grading does not comply
with this Title of the permit conditions, or that the soil or other conditions are
not as stated on the permit, the Town of Marana may order the work
stopped by written notice served on any person engaged in doing or
causing such work to be done.
2. Any such person shall immediately stop such work until authorized by the
Town of Manana to proceed with the work.
C. Penalties:
1 . Failure to obtain permit - Unless exempted by this Title (refer to Section
19.020D), failure to obtain a permft prior to commencement of grading shall
be a violation of this code. However, the Town of Marana may issue an
exception permit if the Town of Marana finds that an emergency existed
which made it impossible first to obtain a permit.
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TOWN OF MARANA, ARIZONA
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2. Violations: A violation may result in issuance of a stop-work order, and
penalties may be assessed in accordance with the Town of Marana
Development Code. A violation of this Title shall also constitute a Class 1
misdemeanor. Payment of any fines or penalties shall not relieve any
person from otherwise complying with the requirements of this Title. Each
and every day that a violation of this Title exists shall be deemed to be a
separate offense.
19.090 Waivers and Interpretation Review.
A. Waivers:
1 Scope: A waiver from a provision of this Title may be granted by the Town
of Marana staff when the strict application of the provision would require
work by the permit holder detrimental to the purposes of this Title and cause
an unnecessary hardship to the property owner.
2. Standards: A waiver shall not be granted unless:
a. The waiver is the minimum necessary to afford relief-,
b. The waiver will not be materially detrimental to the rights of owners
and residents of other affected properties; and
C. The waiver is in harmony with the intent, the purposes, and the
provisions of this Title from which the waiver is requested.
3. Conditions: Conditions may be imposed on a waiver that will:
a. Secure the intent, the purposes, and the provisions of this Title from
which the waiver is granted; and
b. Provide adequately for the protection of surrounding property
owners and residents.
4. Application: The request for a waiver shall be made on a form provided by
the Town of Marana staff and shall be heard within thirty days. Fees shall
be paid in accordance with the fees schedule adopted by the Town of
Marana.
5. Notice and Review: Notice of the application and the hearing shall be
mailed to all property owners within 300 feet of the site and shall be posted
at the Town's official notice positions. The Town Manager shall hold a
hearing on the waiver request and render a decision within five (5) working
days thereafter.
6. Appeal: Within fifteen (15) days of receipt of a notice of decision from the
Town of Marana, the applicant may file an appeal for a hearing by the Town
Council.
B. Interpretation review.
1. Scope: Upon request by an affected person who believes there has been a
misinterpretation, the Manager of the Town of Marana shall review an
interpretation of a provision of this Title made by a Town official.
2. The request for review shall cite:
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TOWN OF MARANA, ARIZONA
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a. The disputed interpretation made by the Town official; and
b. The words alleged to have been misinterpreted.
3. Application: The request shall be made in writing and shall be heard within
thirty (30) days. Fees shall be paid in accordance with the fees schedule
adopted by the Town of Marana.
4. Notice and Review: Notice of the application and the hearing shall be
mailed to all property owners within 300 feet of the site and shall be posted
at the Town's official notice positions. The Town Manager shall hold a
hearing on the request and render a decision within five (5) working days
thereafter.
5. Appeal: A decision of the Town Manager may be appealed to the Town
Council within fifteen days of the decision.
19.091 Severabillity
If any provisions of this Tifle or its application to any person or circumstance is held invalid
or unconstitutional, the invalidity or unconstitutionality does not effect other provisions or
applications of this Tide which can be given effect without the invalid provision or
application, and to this extent the provisions of this Title are severable.
19.092 Delay Effective Date With Respect To Existing Projects.
Any project or action or use which would be regulated under the provisions of these
standards and which would require a peimit, but which are in operation on the date that
these standards are adopted by Ordinance of the Town Council, shall have a period of not
more than 60 days torn the date of adoption of these standards to comply with all of the
requirements as set forth in these standards.
Em
V?
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TOWN OF MARANA, ARIZONA
LAND DEVELOPMENT CODE
19.100 Illustrations.
Building Height Contour Line
maximum zoning
building height building height
minus x/2 contour line
L 1 1 -
dd
? a d d d' fill
existing. grade
Comparison Of Slope*
slope* no greater than 3:1
require revegeiation
4s.!
steep slope*
over 3:1 require
mechanical stabilization
Tide 19 - Standards for Grading & Related Site Work
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TOWN OF MARANA, ARIZONA
LAND DEVELOPMENT CODE
HILLSIDE DEVELOPMENT
(Outline 8129/91)
A. PURPOSE
The mountains and foothills in and around Marana are a valuable scenic resource which
should be preserved. Dominant peaks and ridges should be protected and the
intensity of development regulated according to the natural characteristics of hillside
terrain such as slope, vegetation, landform, soil stability and drainage pattern.
B. REVIEW REQUIRED
All subdividing and development which occurs in any lot or parcel containing protected
peak and ridge areas designated by the Council and in any lot or parcel containing
slopes of fifteen (15) percent or greater, requires a review and compliance with this
Code. Until approval of a plat or plan or permit is granted, no grubbing, grading
excavation or construction is to occur. A non-refundable fee established by Town
Council resolution shall accompany a review request.
C. STANDARDS
The following standards apply to lots and parcels affected by this section:
1 . Any lot or parcel created must meet slope/sizeldensity per table one (1). All
development is subject to a 300 foot setback from each protected peak or
ridge designated.
AVERAGE NATURAL MINIMUM MAXIMUM
CROSS SLOPE AREA DENSITY
N (ACRE) (Dwelling unitstacre)
Less than 15 AS PERMITTED BY ZONING DISTRICT
15-15.9 1.00 1.00
16-16.9 1.00 1.00
17-17.9 1.25 .80
18-18.9 1.37 .73
19-19.9 1.50 .67
20-20.9 2.00 .50
21-21.9 2.25 .44
22-22.9 2.50 .40
23-23.9 3.50 .29
24-24.9 4.50 .22
25-25.9 6.00 .17
26-26.9 7.00 .14
27-27.9 8.60 .12
28-28.9 10.40 .09
29-29.9 12.80 .08
30-30.9 16.00 .06
31-31.9 23.50 .04
32-32.9 31.00 .03
33- and greater 36.00 027
A. Tucson Development Standard (Latest Version) 9.04 shall be utilized.
Tide 19 - Standards for Grading & Related Site Work
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TOWN OF MARANA, ARIZONA
1AND DEVELOPNIENT CODE
1. Buildings are limited to a building height of twenty-four (24) feet. All
exposed exterior walls and roofs of structures are recommended for earth
tone colors to blend in with the predominant natural colors found on the lot
or parcel.
2. All utilities and services shall be underground.
3. Roads and drives leading to lots shall be located to minimize scarring, be in
low Visibility view areas and maximize the retention of natural vegetation.
B. CERTIFICATION
The developer and/or property owner will be responsible for the following:
1 . Submitting sloped area analysis certified by an Engineer, registered in the
State of Arizona, for review and verification by the Town Engineer.
2. Submitting a grading plan prepared by an Engineer, registered in the State
of Arizona, complying with the standards, for review by the Town Engineer.
3. Surveying, staking, and inspection of the lot or parcel by an Engineer,
registered in the State of Arizona, to determine compliance with this Code
and the conditions of approval.
4. On site enforcement by certifying to the Town Engineer, that the
development complies with the Code during the period of construction.
C. DESIGNATION/AMENDMENT OF PROTECTED PEAKS OR RIDGES:
1 . The Town Council designates a peak or ridge for protection by the
established of a 300 foot setback from each peak or ridge. Peaks or ridges
designated for protection must:
a. Have been designated by Pima County as a protected peak or ridge
prior to annexation by the Town, or
b. Be significant in relationship to the surrounding property, or
C. Be highly visible from the lower elevations, or
d. Form a silhouette against the sky when viewed from a scenic route,
D. No designation or amendment shall be acted upon until a public hearing has been
held.
The Planning Commission may notify the 300 foot setback from a protected
peak or ridge if they find that the requests meet the following conditions:
a. The proposed development is for a single family residence.
b. The only area to graded within the protected peak and ridge setback
area is for a building pad and access to the building.
C. Have the highest portion of the structure not higher than twenty (20)
feet below the elevation of the peak or ridge.
d. Have no more than six (6) feet of the external portion of the structure
exposed except at points of ingress and egress.
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TOWN OF MARANA, ARIZONA
1AND DEVELOPMENT CODE
e. All exposed exterior walls roofs and retaining walls are
recommended earth tone color to blend in with the predominant
natural colors and all glass surfaces shall be designated to not
reffect beyond the lot or parcel boundaries.
1W
Tide 19 - Standards for Grading & Related Site Work
PAGff
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PERMIT NO ISSUED.
I ?0= P7
A7
?0,,o
40?
Izo
PERMIT APPLICATION FOR MINOR GRADING
TYPE I GRADING PERMIT
Date of Application: Building Permit No.: Floodplain Permit No.:
Project Address:
Applicant: Telephone: Fax:
Address, City, State & Zip:
Description of Work: (in Acoordance with Tile 19, Town of Marana Land Development Code and Resolution 90-05)
CONDITIONS MET AND APPROVED
A. i
Grading Conditions Applicable for Type 1 Permit: YES
B. Site Plan meets checklist requirements: YES 4 sets
C. Grading Statement in accordance with Title 19: E-1 YES
D. Cost Estimate for site improvements YES Value:
E. Contractor Licenses: State License Town of Marana Business E-.1 Insurance (owner acting as contractor)
F. Floodplain Permit: YES E-7 Not Applicable
G. Special Inspection Certificate: YES E: Not Applicable
H. Right-of-Way Permit: YES f_-!: Not Applicable
PERMIT FEES
Base Fee Amount $100.00
Plans Check Fee $175.00
Inspection Fee (Greater of 2% of Cost Estimate for site improvements or $300) $-
TOTAL FEES DUE
Check No. Receipt No.
Work performed under this permit shall comply with the Town ot Marana StandardS, Regulations, Requirements ana t-eaerai vermrcs.
Contractor: Telephone: Fax:
Address, City, State & Zip:
State
License No. State License
Expires On: Town of Marana Business
License No. Town License Expires On:
Applicant's Signature:
Owner's Name Owners Signature
Accepted for the Town of Marana By: Date of Issuance
THIS PERMIT SHALL BECOME NULL AND VOID IF WORK IS NOT COMPLETED BY
A GOPY OF THIS PhKMIT SMALL t5ft UN IME JUtS A I ALL I IIVII:-?.
Rev. 9/24/2005
D-23 XAI-Subdivision DeparbrAntStandard Forr=\GrWmg\T1\Type I Wp1icxd=.&c
Revised (8-24-05) Effective (9-22-04) Public Works Department
q WRANAL 11
TOWN OF MARANA
MARANA MUNICIPAL COMPLEX
11555 W. Civic Center Drive
MARANA, ARIZONA 85653-7090
Type 1 Grading and Floodylain Residential Site Plan Checklist
(Engineering Seal and Signature may be required for Town of Marana Acceptance)
1. GENERAL INFORMATION
sw?
*Property Owners Name and name of consultant if applicable
eLegal Description - Either lot with subdivision book and page or metes and bounds with section
number. Show assessor's Parcel Number
eType of Marana Land Use Zoning
*Project location - sketch of adjacent lots and roadways
*Legend of symbols used
*Property size, total area of grading, percentage of grading, percentage of Natural Undisturbed
Open Space (NUOS)
2. GRADING INFORMATION
eNorth arrow, bar scale and vertical Datum used for all elevations
*Existing topography (labeled I foot contours with symbology different from proposed)
*Erosion Ha7ard Setback Line and 100 year Floodplain if applicable with building setbacks.
*Limits of grading, show all cut and fill slopes around the property & grade breaks, show spot
elevations (especially at building corners) and proposed contours as needed to depict proposed
grading.
*Drainage flow direction and drainage improvements, including swale details
eLocation of any proposed underground utilities. If the utility crossed a watercourse the depth of the
utility below the watercourse must be indicated.
eDriveway paved in accordance with Land Code 22.090. Show slope of driveway and elevation of top of
curb @ driveway
eA special inspection certificate for the soil/grading of the site. Prior approval of a special inspector(s)
for soil/grading is required prior to issue of the grading permit.
3. FLOODPLAIN INFORMATION
eType of FEMA zoning with panel number, effective date and LOMRs if applicable
e Show 404 limits, Qloo Water Surface Elevations, EHSL, FEMA and locally regulated floodplain
eBank Protection. Bank Protection must be in conformance with State Standard SS7-98.
(SS7-98 Compliance statement must be included on site plan.)
eDepth of Erosion in and near a water course and depth of toe downs for building pads, driveways and
other structural elements.
D-24
Revised (8-24-05) Effective (9-22-04) Public Works Department
4. RIGHT OF WAY INFORMATION
eProperty boundaries with dimensions, setback lines, and found property pins
eAdjacent property ownership (lot numbers if same subdivision or assessors parcel numbers)
*Existing and proposed public and private utility easements and dimensions
5. BUILDING INFORMATION
90verall dimensions of existing/proposed building(s) and distances to property lines
eFinished Floor Elevation(s)
*Fence, patio walls and/or retaining walls with location and spot elevations at top of wall, bottom of
wall and ground elevation of retained earth.
*Utility routing, sizes, and materials including Sewer or septic tank with lateral location
eNumber of parking spaces provided (label the garage)
eProvide the rim elevation (top of manhole) of the nearest upstream sanitary manhole.
*Venting. Details of venting of fully enclosed, non-habitable areas below the Regulatory Flood
elevations designed to equalize hydrostatic flood forces on exterior walls by allowing for the entry
and exit of floodwaters in accordance with guidelines of the National Flood Insurance Program
Regulations 44 CFR § 60.3. Non-habitable areas below the Regulatory Flood Elevation are to be
solely for vehicle parking or storage. This does not include proposed basements, which are not
allowed in a floodplain.
6. LANDSCAPE INFORMATION
*Location of all existing large and protected plant species which are to remain or be removed
7. ADDITIONAL INFORMATION REQUIRED FOR PERMIT ISSUANCE
*Grading statement in accordance with Land Code 19.050C
eltemized cost estimate for all site civil work including site prep, SWPPP measures, earthwork,
driveway, and drainage improvements. If a cost estimate is not available at the time of submittal, the
base fee and plan check fee will be collected. Cost estimate and remaining fees will be required prior to
permit issuance.
8. OTHER ITEMS THAT MAY OR MAY NOT BE REQUIRED
eBuilding permit required for retaining walls (either separate permit or as part of overall building permit)
eFloodplain permit required for structures or grading within the 100 year water surface elevation, Erosion
Hazard Setback Line (EHSL), or FEMA floodplain
*Right-of-Way permit required for construction in Town right-of-way, such as driveway connections,
utility trenching, or access to public drainageways and across no access easements
*Hydrology report may be required for structures or grading within floodplain or EHSL
*Residences within the habitat of the Pygmy Owl are advised to contact Fish and Wildlife
Items in Bold are "quick check" key elements that will be looked at during submittal to determine
overall completeness of site plan. Site plans failing to address these key elements will be returned
without review and without fees being collected.
D-25
9 MARANA 7
4 Izo
Conditions for Type I grading permits
W_
The conditions shown on the type 1 grading permit insure that a grading permit
complies with Title 19 of the Land Development Code. This is an explanation of
the items required and reviewed. MWO
A. Grading conditions Applicable for Type I Permit:
From Title 19, the conditions applicable to a Type 1 Permit are:
1. Residential development on a single lot with a development envelope
not exceeding the following:
Lot Area Development Envelope
0.5 to 5.0 acre (21,780 to 217,800 sf) ... 12,000 sf plus 9.5% of lot area
5.0 acres and more .................. 15% of lot area
2. Residential development on a single lot of less than one-half acre, with
a development envelope of more than
twelve thousand square feet.
3. Nonresidential development on less than 1.0 acre, or which does not
require a sub-division plat or development plan.
4. The clearing, brushing, or grubbing of an area within the limits of Item 1.
5. Temporary off-site stockpiling of not more than ten thousand cubic
yards of fill.
6. Grading-except when reviewed during a golf course review, a
floodplain review, or a Type 2 grading permit review process-which
requires a permanent cut or fill slope greater than five feet in height and
steeper than a 3:1 slope.
7. New pavement of three thousand to five thousand square feet.
B. Site Plan meets checklist requirements.
A 36"x24" site plan shown at a standard engineering scale is submitted to
be reviewed. A site plan checklist is attached to this document. All items
applicable to a given site should be shown on the site plan. In addition,
the checklist shows BOLD items for each category. These items are
considered key items and are given a cursory review at the time of permit
submittal to insure a complete submittal. This cursory review is performed
by a member of the subdivision engineering division. Incomplete
submittals will not be accepted by subdivision engineering personnel.
This is to insure that reviews are possible and give the applicant time to
D-26
correct major deficiencies as soon as possible and not wait for a review of
the plans. If a subdivision engineering employee is not available and the
plan is submitted anyway, it could impact review time. Every effort is
made to insure that at least one person from subdivision engineering is
present during working hours, including lunch.
C. Grading statement in accordance with Title 19.
A written grading statement shall be submitted with an application for a
grading permit. The statement shall include, where applicable:
a. A description of stabilization, erosion, and drainage control measures.
b. The offsite disposal location and estimated quantity of earth material
and vegetation to be removed from the site during grading.
c. If offsite disposal location is other than a public disposal site, provide
copies of permission agreements from affected property owners for
said disposal.
d. Estimated starting and completion dates.
e. A description of the dust control method to be used during grading and
until vegetation or stabilization has been completed.
The grading statement, except for Rem c, can be accomplished by general
notes on the site plan. It should be noted that the Town of Marana has
specific requirements for slope stabilization:
1 . Slopes 3:1 or shallower shall be revegetated (or use clean
landscape rock)
2. Slopes steeper than 3:1 but shallower than 2:1 shall be covered
with rock riprap over filter fabric.
3. Slopes 2:1 and steeper shall have grouted riprap, earth
retaining walls, or retaining walls as appropriate.
D. Cost Estimate for site improvements
The permit fee for the Type 1 permit includes a portion that is a
percentage of the cost of site improvements. Prepare a cost estimate or
obtain a cost estimate from your contractor for the site improvements
including the following:
a. Site prep/clearing and grubbing
b. Stormwater Pollution Prevention Plan (SWPPP) devices to
control erosion in accordance with your grading statement
c. Earthwork cut, fill, trenching, import, and watering
d. Driveway materials and construction
e. Drainage improvements such as culverts and low water
crossings
D-27
Items associated with a building permit are to be excluded from site costs.
Cost estimates will be reviewed and compared to comparable grading
permits.
E. Contractor Licenses
Your general contractor will need to provide a copy of his state
contractor's license and Town of Marana business license. Owners
acting as their own contractor will be required to secure a homeowner
builder insurance policy for the construction of the home. The minimum
liability coverage for this policy shall be $100,000 and the Town of Marana
shall be named an additionally insured on the liability policy. This
insurance policy takes the place of the bonding and insurance carried by
general contractors.
F. Other Permits
A floodplain permit is required for structures or grading within the
floodplain or erosion hazard setback areas on a property. A native plant
permit is required for clearing native vegetation from the planning and
zoning department. A Right of Way permit is required for work within the
Town of Marana right of way; such as driveway connections, utility
trenching, and access through public drainageways and across no access
easements. Staff will guide you through these additional permits.
G. Special Inspection Certificate
A special inspection certificate is required to have the homesite pad
grading certified for compaction. This certification is required for the
building permit but is made a part of the grading permit as that is when the
work is performed. The building department has a listing of certified
inspectors.
Other Considerations
W,
The Town of Marana does not enforce HomeOwner's Associations or
Architectural Review Committee's requirements. It is incumbent upon the
applicant to insure HOA acceptance and/or compliance. The granting of a
permit to grade by the Town of Marana does not constitute HOA/ARC
approval.
D-28
N
7
MARANA 7
RIZO
PERMIT APPLICATION FOR CONSTRUCTION OF PUBLIC IMPROVEMENTS IN THE TOWN OF MARANA
TYPE 11 GRADING PERMIT
Date of Application: PERMIT NO. ISSUED
Project Name:
Project Location/Address:
Description of Work (in accordance with Title 19, Town of Marana Land Development Code and Resolution 90-05):
The permit includes private streets.
Applicant/Owner
Contact Name
Address
city State Zip
Telephone No. Fax No.
Applicant's
Signature (if Applicant is not the Owner, the Applicant guarantees they are acting on behalf of the Owner)
Contractor
Contact Name
Address
city State Zip
Telephone No. Fax Number
State License No. Expiration Date
Town Business
License No. Expiration Date
A COPY OF THIS PERMIT SHALL BE ON THE JOB AT ALL TIMES.
D-29
PERART NO.
For Official Use Only
PERMIT FEES
Base Fee
---- T-sl 00.06
Construction Cost Fee
Greater of $500.00 $
OR
Construction Cost $
1% of Construction Cost - An agreement for inspection of public
improvements has been executed, and Applicant hereby agrees to retain $
an Engineer of Record and pay the costs of all tests of materials and
performance as required by the Town Engineer.
OR
Construction Cost $
3 Y2% of Construction Cost - An agreement for inspection of public
improvements has been executed, and Applicant hereby agrees to retain
the Town of Marana or his/her designated representative as an Engineer $
of Record and pay the costs of all tests of materials and performance as
required by the Town Engineer.
At the Town's Discretion
AT-RISK Grading Fee $500.00
Violation ee (Double permit fee) $
TOTAL FEES DUE $
Check No. Receipt No.
Work performed under this permit shall comply with t Town of Marana Standards, Regulations, Requirements and Federal Permits.
BONDS (AS REQUIRED)
Bond Amount
Re-seeding Bond
Cost: $0.05 per sq ft of area Area
Performance Bond $
Cost of returning the site to the previous condition plus 15% Contingency
Construction Cost: $ Contingency: $
TOTAL FEES DUE
Check No. Receipt No. $
Bond No.
Accepted for the Town of Marana By:
Date of Issuance:
THIS PERMIT SHALL BECOME NULL AND VOID IF WORK IS NOT COMPLETED BY:
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OWNERS INIMLS
Page 2 of 6
D-30 Rm 12/1=W6
PERART NO.
N
9 MARANA 7
Rizo
TOWN OF MARANA
AGREEMENT FOR CONSTRUCTION OF PUBLIC IMPROVEMENTS
TYPE 11 GRADING PERMIT: SUBDIVISION AND/OR DEVELOPMENT
In consideration of mutual covenants herein contained, and for other good and
valuable consideration, the receipt of sufficiency of which is hereby acknowledged by each
party to the other, this AGREEMENT, made and entered into this day of
, 20_, by and between the Town of Marana, a municipal corporation,
hereinafter called the Town, and:
Name
Address
City, State, Zip Code
hereinafter called the Applicant.
WITNESSETH:
WHEREAS, the Applicant desires to make improvement(s) within the Town of Marana,
Arizona at:
Project Name (as depicted on the plans)
Location
Legal Description of the Property
within the public right-of-way, easement, or other property of the Town of Marana. (If
the project is within a subdivision, the map or plat is recorded in the office of the Pima County
Recorder in Book of Maps and Plats at Page _ thereof); and
WHEREAS, the required reports, plans, specifications and soil tests for said work have
been approved by the Town Engineer, and the officials of the appropriate water and
wastewater, or other agencies, as applicable; and
OWNERS INITIALS
Page 3 of 6 Rzv. 12112CW
D-31
PERAUT NO.
0?
WHEREAS, the Applicant desires that the Town approve the construction of said
improvement(s); and
WHEREAS, the Town is willing to approve said improvement(s), provided it/they meet
Town Standards and the work is completed in accordance with Town requirements; and
WHEREAS, the Town requires that such improvements in Town rights-of-way be 4W
constructed in accordance with Town standards, regulations, and requirements;
NOW, THEREFORE, IT IS AGREED AS FOLLOWS:
1. That the Applicant shall install and construct or cause to have constructed, at the
Applicant's sole expense, the improvements set forth in the plans and ow
specifications,
which plans and specifications have been
prepared by a Professional Engineer registered to practice in Arizona, and which
have been reviewed and approved by the Town Engineer, as well as by the
appropriate owner/agency. Construction shall also comply with the conditions for Now
improvements as specified herein.
2. That said work shall be done in conformance to all applicable regulations, permits,
standards, and requirements of the Town; and that all required permits shall be
obtained by the Applicant prior to the commencement of any work under this
Agreement.
3. That a Professional Engineer, registered to practice in Arizona, shall be retained by
the Applicant as "Engineer of Record", and said Engineer shall lay out and
establish the lines and grades for the work as it progresses, shall be responsible
for the surveillance of the construction, and shall order tests to verify the
compliance of materials incorporated into the work with the specifications.
4. That the Applicant shall notify, in writing, the Owners of all properties abutting the
periphery of the development. Notification shall include a description of the work,
the approximate dates the construction will take place, and a telephone number
and name of the individual to contact if further information is required. Notification
shall be accomplished a mi nimum of seven (7) calendar days prior to the
commencement of any construction activities. A copy of such notice shall be
submitted to the Town Engineer.
5. That the Applicant shall pay any and all inspection fees as may be charged to the
Applicant by the Town.
6. That the Applicant shall be solely responsible for the cost of material tests required
by the Town as well as securing all applicable materials compliance documents
and certifications.
OWNERS INITLALS
Page 4 of 6
D-32 ftm I VI=W6
PERNUT NO.
7. That the work shall be subject to the inspection and the approval of the Town as
the work progresses. The Engineer of Record shall provide at the end of each
month a written report as to the progress of the construction together with
inspection reports, materials test reports, and any other supplemental data
pertinent to the work. Deviations from the approved plans shall be shown on the
"As-Built" mylars of the plans. All changes or deviations in the approved plans
and/or specifications, other than those of a minor nature, shall be submitted to the
Town Engineer for review and approval prior to execution in the field.
8. That the Town Engineer or his/her designated representative shall be present at
the final on-site inspection of the improvements. Deficiencies in the work noted
during the final inspection shall be corrected to the satisfaction of the Town prior to
approval of the improvement by the Town and/or prior to release of assurances.
9. That within thirty (30) calendar days of the completion of construction, the Applicant
shall furnish the Town Engineer a closeout package that includes all applicable
items from Section 06-06 of Title 6 of the Marana Land Development Code. A
certified listing of all items and quantities installed and associated costs will be
required to verify permit fees.
10.That the Applicant shall guarantee the work against defective materials or
workmanship for a period of at least one (1) year from the final acceptance of the
improvements by the Town. Upon discovery of defects, any repair or replacement
by the Town pursuant to said guarantee shall be undertaken immediately to the
satisfaction of and at no cost to the Town.
11. We the undersigned, our successors and assigns, do hereby save the Town of
Marana, its successors and assigns, their employees, officers and agents harmless
and indemnify same from any and all claims for damage to persons or property
related to the improvements/installations as set forth in the accepted plans and
specifications first mentioned above, to the fullest extent permitted by law.
12. During the construction of said improvements, the applicant shall maintain policies
of liability insurance, issued by companies licensed to do business in Arizona, in
amounts not less than $1,000,000.00, and the Town of Marana shall be an
additional insured. The policy limit shall not be construed to limit the scope of
indemnity above.
IN WITNESS WHEREOF, the Applicant has executed or has caused this Agreement
to be executed by its proper and duly authorized officer and the Town has caused this
Agreement to be executed by the Town Engineer or authorized representative as of the day
and year first written above.
OWNERS INITL4LS
Page 5 of 6 Rev. 12/1=006
D-33
PERAHT NO.
OWNER, TR UST HOLDER OR AUTHORIZED AGENT (APPLICANTY_
Print or Type Company Name
Address
Telephone Number Fax Number
Signature of Owner, Trust Holder Date
or Authorized Agent
Print or Type Name and Title of
Owner, Trust Holder or Authorized
Agent
The terms and conditions of this Agreement have been read and are hereby agreed to
and accepted by the following:
ENGINEER OF RECORD:
Print or Type Company Name
Address
Telephone Number Fax Number
Signature of Owner, Trust Holder Date
or Authorized Agent
Print or Type Name and Title of
Owner, Trust Holder or
Authorized Agent
CONTRACTOR:
Print or Type Company Name
Address
Telephone Number Fax Number
Signature of Owner, Trust Holder
or Authorized Agent Date
Print or Type Name and Title of
Owner, Trust Holder or
Authorized Agent
TOWN OF MARANA:
Signature of Town Engineer or Date
Authorized Representative I I
OWNERS INITIALS
Page 6 of 6
D-34 Rev. 12[12/2006
4 O-NWVN ,
9 ARA A7
RIZOS
RESIDENTIAL PERMIT CHECKLIST
Project Name: Project Name as it appears on the final plat
Owner/Developer's Info
F-1 Letter allowing for another party to sign for the Owner/Developer
M NOI (not required if under an acre)
Contractor's Info
Hold Harmless Documentation:
Certificate of Liability Insurance (Listing the Project Name and naming the Town as
additionally insured in the amount of 1 M dollar)
Construction Cost Estimate (Fees will be determined by the Town)
State License #: Expiration Date:
Town License #: Expiration Date:
NOI (not required if under an acre)
PDEQ Activity Permit
ROW Permit Application (At the discretion of the Town)
Notice of Construction(At the discretion of the Town)
EOR's Info
1 copy of the Town Approved SWPPP
3 copies of the Plan
bo-i i Rev 12/12/2006
zz
Grading Permit
F-1 Preliminary Grading
E] Assurance: Total cost
Re-seeding Bond = 0.00 sq ft @ $
= $0.05 per square foot. The bond will be returned upon receiving a full
grading permit.
F? AT-RISK Grading
F-1 Assurance: Total cost
Re-seeding Bond = 0.00 sq ft @ $
= $0.05 per square foot. The bond will be returned upon receiving a full
grading permit.
Performance Bond +
= Cost of construction (grading only) + 15% contingency. The bond will be
returned upon recordation of the Third Party Trust and Final Plat
[:] Grading without an Assurance
Assurance: Total cost=
Performance Bond = +
= Cost of construction + 15% contingency. The bond will be returned
upon recordation of the Third Party Trust and Final Plat
Form A
F? PDEQ Water Notice to Construct
El PDEQ Sewer Notice to Construct
F 3 copies of Plans
Form B (if it contains public streets)
F 3 copies of the Plan (if different from Type 11 Grading Permit)
L::j
iw
aw
Page 2 of 2
D-36 Rm 12112/20D6 Ow
,0 N 0,
9 MAR A7
RIZOS
COMMERICAL PERMIT CHECKLIST
Project Name: Project Name as it appears on the final plat
Owner/Developer's Info
F? Letter allowing for another party to sign for the Owner/Developer
F NOI (not required if under an acre)
Contractor's Info
F-1 Hold Harmless Documentation:
Certificate of Liability Insurance (Listing the Project Name and naming the Town as
additionally insured in the amount of 1 M dollar)
F-1 Construction Cost Estimate (Fees will be determined by the Town)
State License #: Expiration Date:
Town License #: Expiration Date:
F-1 NOI (not.required if under an acre)
F-1 PDEQ Activity Permit
F-1 ROW Permit Application (At the discretion of the Town)
El Notice of Construction (At the discretion of the Town)
EOR's Info
F-1 1 copy of the Town Approved SWPPP (not required if under an acre)
3 copies of the Plan
F-1 Performance Bond for work done within the right-of-way (At the discretion of the
Town)
Performance Bond +
= Cost of construction (in the ROW only) + 10% contingency.
The bond will be retumed upon completion of the closeout
package.
bo-i i Rev 12/12/2006
Grading Permit
F-1 Preliminary Grading
Assurance: Total cost
Re-seeding Bond = 0.00 sq ft @ $
= $0.05 per square foot. The bond will be returned upon receiving a
full grading permit.
F-1 AT-RISK Grading
F-1 Assurance: Total cost
• Re-seeding Bond = 0.00 sq ft @ $
= $0.05 per square foot. The bond will be returned upon receiving a
full grading permit.
• Performance Bond +
= Cost of construction (grading only) + 15% contingency. The bond
will be returned upon completion of the improvement plans.
Form A (only if any work needs to be dedicated to the utility companies)
F? PIDEQ Water Notice to Construct
F-1 PIDEQ Sewer Notice to Construct
M 3 copies of Plans
Form B (only if work is done in the right-of-way)
F-1 3 copies of the Plan (if different from Type 11 Grading Permit)
a-
Page 2 of 2
D-38 Rm 12/12/2006 Ow
VMLN 0,
7
qMARANA7
PERMIT APPLICATION FOR CONSTRUCTION OF PUBLIC IMPROVEMENTS IN THE TOWN OF MARANA
FORM A - MAJOR UTILITY INSTALLATIONS PERMIT
Date of Application: PERMIT NO. ISSUED
Project Name:
Project Location/Address:
Description of Work (in accordance with Title 19, Town of Marana Land Development Code and Resolution 90-05):
This project is in the n Marana Water service area or the [] Tucson Water service area.
Applicant/Owner
Contact Name
Address
city tate Zip
Telephone No. Fax No.
Applicant's
Signature (if Applicant is not the Owner, the Applicant guarantees they are acting on behalf of the Owner)
Contractor
Contact Name
Address
city State Zip
Telephone No. Fax Number
State License No. Expiration Date
Town Business
License No. Expiration Date
A COPY OF THIS PERMIT SHALL BE ON THE JOB AT ALL TIMES.
D-39
PERAHT NO.
For Official Use Only
PERMIT FEES
Base Fee $100.00
Construction Cost Fee
Greater of $500.00 $
OR
Construction Cost $
1 % of Construction Cost - An agreement for inspection of public
improvements has been executed, and Applicant hereby agrees to retain $
an Engineer of Record and pay the costs of all tests of materials and
performance as required by the Town Engineer.
OR
Construction Cost $
2 Y2% of Construction Cost - An agreement for inspection of public
improvements has been executed, and Applicant hereby agrees to retain
the Town of Marana or his/her designated representative as an Engineer $
of Record and pay the costs of all tests of materials and performance as
required by the Town Engineer.
At the Town's Discretion
Violation Fee (Double permit fee) $
TOTAL FEES DUE $
Check No. Receipt No.
Work performed under thm permit Shall Comply With the i own oT marana btanoarcs, Kegumuons, Kequiremenis anu reuerai rermim.
Accepted for the Town of Marana By:
Date of Issuance:
THIS PERMIT SHALL BECOME NULL AND VOID IF WORK IS NOT COMPLETED BY:
OWNERS INITLALS
Page 2 of 6
D40
Rev. 17/IV2W6
PEPMT NO.
N
9 MARANA 7
RIZO
TOWN OF MARANA
AGREEMENT FOR CONSTRUCTION OF PUBLIC IMPROVEMENTS
FORM A - MAJOR UTILITY INSTALLATIONS PERMIT:
SUBDIVISION AND/OR DEVELOPMENT
In consideration of mutual covenants herein contained, and for other good and
valuable consideration, the receipt of sufficiency of which is hereby acknowledged by each
party to the other, this AGREEMENT, made and entered into this day of
,20 , by and between the Town of Marana, a municipal corporation,
hereinafter called the Town, and:
Name
Address
hereinafter called the Applicant.
WITNESSETH:
City, State, Zip Code
WHEREAS, the Applicant desires to make improvement(s) within the Town of Marana,
Arizona at:
Project Name (as depicted on the plans)
Location
Legal Description of the Property
within the public right-of-way, easement, or other property of the Town of Marana. (If
the project is within a subdivision, the map or plat is recorded in the office of the Pima County
Recorder in Book of Maps and Plats at Page _ thereof); and
WHEREAS, the required reports, plans, specifications and soil tests for said work have
been approved by the Town Engineer, and the officials of the appropriate water and
wastewater, or other agencies, as applicable; and
OWNERS ElaTIALS
Page 3 of 6
D41 Rev. 12nV2W6
PERMIT NO.
WHEREAS, the Applicant desires that the Town approve the construction of said am
improvement(s); and
WHEREAS, the Town is willing to approve said improvement(s), provided it/they meet
Town Standards and the work is completed in accordance with Town requirements; and
WHEREAS, the Town requires that such improvements in Town rights-of-way be
constructed in accordance with Town standards, regulations, and requirements;
NOW, THEREFORE, IT IS AGREED AS FOLLOWS:
That the Applicant shall install and construct or cause to have constructed, at the
Applicant's sole expense, the improvements set forth in the plans and
specifications,
I which plans and specifications have been
prepared by a Professional Engineer registered to practice in Arizona, and which
have been reviewed and approved by the Town Engineer, as well as by the
appropriate owner/agency. Construction shall also comply with the conditions for
improvements as specified herein.
2. That said work shall be done in conformance to all applicable regulations, permits,
standards, and requirements of the Town; and that all required permits shall be
obtained by the Applicant prior to the commencement of any work under this
Agreement.
3. That a Professional Engineer, registered to practice in Arizona, shall be retained by
the Applicant as "Engineer of Record", and said Engineer shall lay out and
establish the lines and grades for the work as it progresses, shall be responsible
for the surveillance of the construction, and shall order tests to verify the
compliance of materials incorporated into the work with the specifications.
4. That the Applicant shall notify, in writing, the Owners of all properties abutting the
periphery of the development. Notification shall include a description of the work, .1m
the approximate dates the construction will take place, and a telephone number
and name of the individual to contact if further information is required. Notification
shall be accomplished a minimum of seven (7) calendar days prior to the ow
commencement of any construction activities. A copy of such notice shall be
submitted to the Town Engineer.
5. That the Applicant shall pay any and all inspection fees as may be charged to the
Applicant by the Town.
6. That the Applicant shall be solely responsible for the cost of material tests required
by the Town as well as securing all applicable materials compliance documents
and certifications.
OWNERS INITULS
Page 4 of 6
D-42
ftz,. 12a=W6 am
PERMIT NO.
7. That the work shall be subject to the inspection and the approval of the Town as
the work progresses. The Engineer of Record shall provide at the end of each
month a written report as to the progress of the construction together with
inspection reports, materials test reports, and any other supplemental data
pertinent to the work. Deviations from the approved plans shall be shown on the
"As-Built" mylars of the plans. All changes or deviations in the approved plans
and/or specifications, other than those of a minor nature, shall be submitted to the
Town Engineer for review and approval prior to execution in the field.
8. That the Town Engineer or his/her designated representative shall be present at
the final on-site inspection of the improvements. Deficiencies in the work noted
during the final inspection shall be corrected to the satisfaction of the Town prior to
approval of the improvement by the Town and/or prior to release of assurances.
9. That within thirty (30) calendar days of the completion of construction, the Applicant
shall furnish the Town Engineer a closeout package that includes all applicable
items from Section 06-06 of Title 6 of the Marana Land Development Code. A
certified listing of all items and quantities installed and associated costs will be
required to verify permit fees.
10.That the Applicant shall guarantee the work against defective materials or
workmanship for a period of at least one (1) year from the final acceptance of the
improvements by the Town. Upon discovery of defects, any repair or replacement
by the Town pursuant to said guarantee shall be undertaken immediately to the
satisfaction of and at no cost to the Town.
11.We the undersigned, our successors and assigns, do hereby save the Town of
Marana, its successors and assigns, their employees, officers and agents harmless
and indemnify same from any and all claims for damage to persons or property
related to the improvements/installations as set forth in the accepted plans and
specifications first mentioned above, to the fullest extent permitted by law.
12. During the construction of said improvements, the applicant shall maintain policies
of liability insurance, issued by companies licensed to do business in Arizona, in
amounts not less than $1,000,000.00, and the Town of Marana shall be an
additional insured. The policy limit shall not be construed to limit the scope of
indemnity above.
IN WITNESS WHEREOF, the Applicant has executed or has caused this Agreement
to be executed by its proper and duly authorized officer and the Town has caused this
Agreement to be executed by the Town Engineer or authorized representative as of the day
and year first written above.
OWNERS INITIALS
Page 5 of 6 Rxv. M=006
D-43
PERNUT NO.
OWNER, TR UST HOLDER OR AUTHORIZED AGENT (APPLICANT):
Print or Type Company Name
Address
Telephone Number Fax N umber
Signature of Owner, Trust Holder Date
or Authorized Agent
Print or Type Name and Tifle of
Owner, Trust Holder or Authorized
Agent
The terms and conditions of this Agreement have been read and are hereby agreed to
and accepted by the following:
ENGINEER OF RECORD:
Print or Type Company Name
Address
Telephone Number Fax Number
Signature of Owner, Trust Holder
or Authorized Agent Date
Print or Type Name and Title of
Owner, Trust Holder or
Authorized Agent
CONTRACTOR:
Print or Type Company Name
Address
Telephone Number Fax Number
Signature of Owner, Trust Holder
or Authorized Agent Date
Print or Type Name and Title of
Owner, Trust Holder or
Authorized Agent
TOWN OF MARANA:
Signature of Town Engineer or Date
Authorized Representative I I
OWNERS INITLALS
Page 6 of 6
D-44 Rev. 12112/2006 now
9 MARANA7
RIZOTA
PERMIT APPLICATION FOR CONSTRUCTION OF PUBLIC IMPROVEMENTS IN THE TOWN OF MARANA
FORM B - TO BE DEDICATED TO THE TOWN
Date of Application: PERMIT NO. ISSUED
Project Name:
Project Location/Address:
Description of Work (in accordance with Title 19, Town of Marana Land Development Code and Resolution 90-05):
ApplicantlOwner
Contact Name
Address
city tate Zip
Telephone No. Fax No.
Applicant's
Signature (if Applicant is not the Owner, the Applicant guarantees they are acting on behalf of the Owner)
Contractor
Contact Name
Address
city State Zip
Telephone No. Fax Number
State License No. Expiration Date
Town Business
License No. Expiration Date
A COPY OF THIS PERMIT SHALL BE ON THE JOB AT ALL TIMES.
D-45
PERART NO.
W11
For Official Use Only
PERMIT FEES
Base Fee $100.00
Construction Cost Fee
Greater of $500.00 $
OR
Construction Cost $
1% of Construction Cost - An agreement for inspection of public
improvements has been executed, and Applicant hereby agrees to retain $
an Engineer of Record and pay the costs of all tests of materials and
performance as required by the Town Engineer.
OR
Construction Cost $
2 !/2% of Construction Cost - An agreement for inspection of public
improvements has been executed, and Applicant hereby agrees to retain
the Town of Marana or his/her designated representative as an Engineer $
of Record and pay the costs of all tests of materials and performance as
required by the Town Engineer.
At the Town's Discretion
Violation Fee (Double permit fee) $
TOTAL FEES DUE $
Check No. Receipt No.
4-
ow
*W1
AM
Work performed under this permit Shall comply with the i own oT marana btanoaras, Keguiauons, KequiremenEs anu reuvi ai ruy i i mb-
Accepted for the Town of Marana By:
Date of Issuance:
THIS PERMIT SHALL BECOME NULL AND VOID IF WORK IS NOT COMPLETED BY:
40.
Aw
OWNERS INITULS
Page 2 of 7
D-46 R?. 12/IV20% aw
PERNHT NO.
N
9 MARANA 7
lzo?
TOWN OF MARANA
AGREEMENT FOR CONSTRUCTION OF PUBLIC IMPROVEMENTS
FORM B - TO BE DEDICATED TO THE TOWN
In consideration of mutual covenants herein contained, and for other good and
valuable consideration, the receipt of sufficiency of which is hereby acknowledged by each
party to the other, this AGREEMENT, made and entered into this day of
,20 , by and between the Town of Marana, a municipal corporation,
hereinafter called the Town, and:
Name
Address
City, State, Zip Code
hereinafter called the Applicant.
WITNESSETH:
WHEREAS, the Applicant desires to make improvement(s) within the Town of Marana,
Arizona at:
Project Name (as depicted on the plans)
Location
Legal Description of the Property
within the public right-of-way, easement, or other property of the Town of Marana. (if
the project is within a subdivision, the map or plat is recorded in the office of the Pima County
Recorder in Book of Maps and Plats at Page _ thereof); and
WHEREAS, the required reports, plans, specifications and soil tests for said work have
been approved by the Town Engineer, and the officials of the appropriate water and
wastewater, or other agencies, as applicable; and
OWNERS INITIALS
Page 3 of 7
D-47 Pev. 12n=W6
PERNUT NO.
WHEREAS, the Applicant desires that the Town approve the construction of said
improvement(s); and
WHEREAS, the Town is willing to approve said improvement(s), provided it/they meet
Town Standards and the work is completed in accordance with Town requirements; and
WHEREAS, the Town requires that such improvements in Town rights-of-way be
constructed in accordance with Town standards, regulations, and requirements;
NOW, THEREFORE, IT IS AGREED AS FOLLOWS:
That the Applicant shall install and construct or cause to have constructed, at the
Applicant's sole expense, the improvements set forth in the plans and
specifications,
1 which plans and specifications have been
prepared by a Professional Engineer registered to practice in Arizona, and which
have been reviewed and approved by the Town Engineer, as well as by the
appropriate owner/agency. Construction shall also comply with the conditions for
improvements as specified herein.
2. That said work shall be done in conformance to all applicable regulations, permits,
standards, and requirements of the Town; and that all required permits shall be
obtained by the Applicant prior to the commencement of any work under this
Agreement.
3. That a Professional Engineer, registered to practice in Arizona, shall be retained by
the Applicant as "Engineer of Record", and said Engineer shall lay out and
establish the lines and grades for the work as it progresses, shall be responsible
for the surveillance of the construction, and shall order tests to verify the
compliance of materials incorporated into the work with the specifications.
4. That the Applicant shall notify, in writing, the Owners of all properties abutting the
periphery of the development. Notification shall include a description of the work, OR
the approximate dates the construction will take place, and a telephone number
and name of the individual to contact if further information is required. Notification
shall be accomplished a minimum of seven (7) calendar days prior to the ON
commencement of any construction activities. A copy of such notice shall be
submitted to the Town Engineer.
5. That the Applicant shall pay any and all inspection fees as may be charged to the
Applicant by the Town.
6. That the Applicant shall be solely responsible for the cost of material tests required
by the Town as well as securing all applicable materials compliance documents
and certifications.
OWNERS INITULS
Page 4 of 7
D-48
P-m 12nV2006 ow
PERAHT NO.
7. That the work shall be subject to the inspection and the approval of the Town as
the work progresses. The Engineer of Record shall provide at the end of each
month a written report as to the progress of the construction together with
inspection reports, materials test reports, and any other supplemental data
pertinent to the work. Deviations from the approved plans shall be shown on the
"As-Built" mylars of the plans. All changes or deviations in the approved plans
and/or specifications, other than those of a minor nature, shall be submitted to the
Town Engineer for review and approval prior to execution in the field.
8. That the Town Engineer or his/her designated representative shall be present at
the final on-site inspection of the improvements. Deficiencies in the work noted
during the final inspection shall be corrected to the satisfaction of the Town prior to
approval of the improvement by the Town and/or prior to release of assurances.
9. That within thirty (30) calendar days of the completion of construction, the Applicant
shall furnish the Town Engineer a closeout package that includes all applicable
items from Section 06-06 of Title 6 of the Marana Land Development Code. A
certified listing of all items and quantities installed and associated costs will be
required to verify permit fees.
10.That the Applicant shall grant, bargain, sell, convey, transfer and deliver to the
Town the improvements installed pursuant to this Agreement, and shall execute
and deliver to the Town a Bill of Sale, or other approved conveyance, for said
encumbrances within thirty (30) days of acceptance of the improvements by the
Town.
11. That the Town shall accept title to and take possession of said improvements upon
their satisfactory completion as approved by the Town Engineer upon receipt of the
Bill of Sale from the Applicant, and upon execution of an agreement for
maintenance by the Applicant where landscaping is involved.
12.That the Applicant shall guarantee the work against defective materials or
workmanship for a period of at least one (1) year from the final acceptance of the
improvements by the Town. Upon discovery of defects, any repair or replacement
by the Town pursuant to said guarantee shall be undertaken immediately to the
satisfaction of and at no cost to the Town.
13.We the undersigned, our successors and assigns, do hereby save the Town of
Marana, its successors and assigns, their employees, officers and agents harmless
and indemnify same from any and all claims for damage to persons or property
related to the improvements/installations as set forth in the accepted plans and
specifications first mentioned above, to the fullest extent permitted by law.
OWNERS INITULS
Page 5 of 7
D-49 Rm 12/12n006
PERART NO.
14. During the construction of said improvements, the applicant shall maintain policies
of liability insurance, issued by companies licensed to do business in Arizona, in
amounts not less than $1,000,000.00, and the Town of Marana shall be an
additional insured. The policy limit shall not be construed to limit the scope of
indemnity above.
IN WITNESS WHEREOF, the Applicant has executed or has caused this Agreement
to be executed by its proper and duly authorized officer and the Town has caused this
Agreement to be executed by the Town Engineer or authorized representative as of the day
and year first written above.
OWNER, TR UST HOLDER OR AUTHORIZED AGENT (APPLICANT):
Print or Type Company Name
Address
Telephone Number Fax Number
Signature of Owner, Trust Holder
or Authorized Agent Date
Print or Type Name and Title of
Owner, Trust Holder or Authorized
Agent
owl
OWNERS INIMLS
Page 6 of 7
D-50 Rev. 12/12/2006 ow
I
PERMT NO.
The terms and conditions of this Agreement have been read and are hereby agreed to
and accepted by the following:
ENGINEER OF RECORD:
Print or Type Company Name
Address
-
-
Telephone Number T F? Number
Signature of Owner, Trust Holder
or Authorized Agent Date
Print or Type Name and Title of
Owner, Trust Holder or
Authorized Agent
CONTRACTOR:
Print or Type Company Name
Address
Telephone Number Fax Number
Signature of Owner, Trust Holder
or Authorized Agent Date
Print or Type Name and Title of
Owner, Trust Holder or
Authorized Agent
TOWN OF MARANA:
Signature of Town Engineer or Date
Authorized Representative I I
OWNERS INITULS
Page 7 of 7 Rm 1211MW6
D-51
TOWN OF MARANA
FLOODPLAIN USE PERMIT APPLICATION
MARAN 11555 West Civic Center Drive
=/ i \ Marana, AZ 85653
TOWN OF MARAMA PHONE: (520) 382-2600 FAX- (520) 382-2641
TO BE FILLED OUT BY APPLICANT (PLEASE PRINT CLEARLY):
APPLICANT INFORMATION: PROPERTY INFORMATION:
NAME: ADDRESS:
COMPANY NAME: TAX CODE NO.:
MAILING ADDRESS: TOWNSHIP: RANGE: ION
TELEPHONE NO.: LEGAL DESCRIPTION:
FAX NO.:
CONTRACTOR INFORMATION (if applicable):
BUSINESS NAME: CONTRACTOR LICENSE NO.:
MAILING ADDRESS: MARANA BUSINESS LICENSE NO.:
TELEPHONE NO.: FAX NO.:
PROPERTY OWNER INFORMATION:
NAME: Information submitted with application:
ADDRESS:
TELEPHONE NO.:
Description of work taking place on the property:
Will fill or the storage of fill take place on the prope ? (Circle One) Yes No
By signing this permit application, the undersigned applies for a permit pursuant and subject to the requirements to the FLOODPLAIN
AND EROSION HAZARD MANAGEMENT CODE (Title 21 of the Town of Marana Land Development Code). and hereby agrees to
faithfully abide by all the Covenants, Conditions, and Restrictions contained or referred to herein and to indemnify, defend, and hold
harmless the Town of Marana and their agents from and against any and all suits, claims, or demands associated with the approval
of this application. This application becomes a valid permit only when completed and signed approved by the Town of Marana
below and accepted by applicant. Validated permit is subject to the conditions and restrictions attached OF ANY).
1APPLICANT SIGNATURE: DATE:
THIS PORTION TO BE COMPLETED BY TOWN OF MARANA FLOODPLAIN MANAGEMENT SECTION
REC-D BY 777 PANEL ZONE 1 -7?7 DATE ELEVATION CERTIFICATE
1 REQ'D I COMPLETE
FLOODPLAIN USE PERMIT NO. BUILDING PERMIT NO. -
CONDITIONS & RESTRICTIONS NO.
D-52
Please Note: Per Ordinance No. 2005-16 there is a $5.00 charge for this service.
Please pay at the Development Services Center when dropping off your request or
call Subdivision Engineering to set up an Advanced Payment Account.
TOWN OF MARANA
FLOOD HAZARD INFORMATION SHEET
11555 W. Civic Center Drive
Marana, AZ 85653
PHONE: (520) 382-2600 FAX: (520) 382-2641
TO BE COMPLETED BY REQUESTER OF INFORMATION (ALL INFORMATION MUST BE PROVIDED):
*ATTN (Requester Name)-
Phone: Fax:
Property Address:
Property Tax Code:
Township: Range: Section:
Legal Description:
TO BE COMPLETED BY TOWN OF MARANA FLOODPLAIN MANAGEMENT:
Received Code Area
The following information is provided for the above described property:
I The property is located in a Special Flood Hazard Area (SFHA) on a National Flood Insurance STATUS*
Program (NFIP) Flood Insurance Rate Map (FIRM) .......................................................
-NFIP community 4: 040118
-FIRM panel #: 04019C K
-Date of FIRM panel:
-LOMIVLOMA date:
-FIRM ZONE:
2. The main structure on the property is located in the SFHA indicated in (1) ....................................
NOTE: Federal law required that a flood insurance policy be obtained as a condition of a federally-backed mortgage
Or loan that is secured by a building located within a SFHA
3. The property is located in a locally identified and regulated flood and/or erosion hazard area and
may be subject to local floodplain regulations which affect and/or limit existing and/or future
uses of the property .....................................................................................................
4. The property is located in a mapped FLOODWAY where most uses are prohibited by local ordinance ...
*STATUS KEY: Y = Yes, N = No, P = PartiaIly, I = Insufficient information for determination, NA = Not applicable
NOTE: The above information is based on the best data resources currently available. Be advised that flood hazard status is
subject to change without individual notice. This letter does not imply that the referenced property will or will not be free
from flooding or damage. A property indicated as not being in a floodplain may be damaged by a flood greater than that
which is regulated or by a local drainage problem that has not been identified or is not regulated. This letter does not create
liability on the part of the provider, or any officer or employee thereof, for any damage that results from reliance on this
determination.
Town of Marana Floodplain Management Signature Date
Total Fees Paid: APA:
D-53
FMERAL EMERGENCY MANAGEMENT AGENCY O.M.B. No. 3067-0077
NATIONAL RDOID INSLIRANCE PROGRAM Expires Decernber 31, 2005
ELEVATION CERTIFICATE
knpwitarlt R&-d ft knoucbm an pnes I - 7.
SECTION A - PROPERTY OWNER INFORMATION
BUILDING OWNERS NAME Policy*Mr , n Their
BUILDING STRMADDRESS(IndudiiMApt., Unit Sufi% ard/orBI4 No.)OR P.O. ROUTE AND BOX NO. -Company NAIC Nurnber
CITY STATE ZIP CODE
PR0PEFrrY DESCRIPMM (Lot and Block Numbers, Tax Parcel Number, Legal Desoom, etc.)
BUILDING USE (e.g., Residenfol, NbnqeskW*eL Adclilion, Accessory, etc. Use a Cornments area, N necessary.)
LATrrUDE/LONGrrUDE (OPTIONAL) HOPJZONTAL DATUK- SOURCE: 0 GPS ffype?
#Ar - #r - aw or ##.####Ar) 0 NAD 19Z7 0 NAD 1983 0 USGS Guad Map 0 01W.
SECTION B - FLOOD INWRANCE RATE MAP (FIFM INFORMATION
1311. WIP COMMUNITY NAM & C010MUNITY NMER COUNTYNAME STAT E
84. WAP AND PANEL
NUMBER
B5.SUFM J
86. FIRM fM DATE B7.FIRMPANEL
EFFECTIVEREW-31M DATE
B&FLOODMPS) I 89 BASE FLOOD S)
9breAOUSede0d#00ft
B10. wxxm the jr0e of the Base Flood Elevation (BFE) date or t Hopt P ntc rod in B9.
w
0 FLS Prole 0 FlFJA 0 Comwnily Delenribed Other (Describe):
BI I - Indicate the elevation datum toed for lhe BFE in B9: 0 NGVD 1M ONAVD11988 [:10therpescribey_
B1z Is the building localted in a Coastal Barrier Resources System (CBR:S) am or Othenvise PmWA Area (OPA)? OYes ONo DesignatimDate
SECTION C - BULDING ELEVATION INFORmaoN (sLRvEy REoump
C1. BukkV elevaiions are based m: 0 Catstruction Da*W 0 Building undercorshdon* 0 Finished Ca-struction
'AnewElevation Certilicatewillbe rewred when
C2 (SeW fle buildit9dagram most Similarto the bAft forwhich this owlificale is being completed -seepages 6 and 7. Nnodiagram
axuralely represents the builcing, provide a s1mlich or
C3. Elevations - Zorn Al AW, AE, AR A (with B%-? VF, V1430, V (with BFE), AR, APIA, ARJAF, AF;VAj-A30, ARtAH, APJAO
Complete Ilems C3.-a4 below a=&@ ID tie bukIT diagram vecilied in ftem C2. State the datum used If lhe datum is diflerent korn the datum used for the WE in
Section B, corrvert the datum to Mused forte BFE. Show field measurements and daturn cmiersion calculation. Use the space pvvkW or the Cmiments; am of
Sectim D or Section G, as approIxiate, to document the datum conversion.
Datum Conversicn?enls
Bevalion rewence mark used Dom the elevation mfava rra? used appearon theFIRM? OYes Ott
• a) Top dboftom floorfkluc4 basement or enclosure)
• b) Top of red Ngher floor
• q) Bottom oflowesthomnlai structurd member(Vzones only) -__!Qm)
• d) Attached 9- (top of slab) _fL(M)
E E
• e) Lcwest elevation of madwery andfor equipment LU CD
servicing the bildng (Describe in a Comments area)
___Ym) ?: 6
2.2
E
• 0 Lowest 4awft Omsho pade (LAG) z
Z.9
• g) Higlea a*-uentflin? grade (RAG)
• h) No of permanent operings ffiood vents) within I It. above a*icW grade CD
oil areaul-valplarem wenings pum ventl in "n _4 irL (sq cm)
SECTION D - SURVEYOR ENGINEER OR ARCHITECT CERTIFICATION
This ceffmfion is to be signed and sealed by a land surveyor, engineer, or architect wthorized by law to certify elevation information.
I certify that the inbroation in Sections A B, and C on this o9afficate mpresents nrl best efforts to interpret the data available
I understand that any false statement may be punishable by One or imptonment under 18 U.S. CDdk SWW 1001.
CERTIFERSNAME LICENSE NUMBER
TITLE COMPANY NAME
ADDRESS .-STATE ZIPCODE
SIGNATURE DATE TELEPHONE
FEMA Form 81-31, January 2003 See reverse side for continuation. Replaces all previous editions
D-54
.W
.0w
No
AW
IMPORTAKr.- In two spaces, copy the cmespmft Wmadon from Secoon A.
MLDWMT?EL7AaF,EMorxkftApLLhtSLkt,axVorftNo.)ORPO ROUMANDOMNO MCYNWbff
CITY STATE ZIPCOM "Cdrpany t" NWdW
SECTION D - SURVEYOR ENGINEEK OR ARCHTECT COUMATION (CONTINUED)
Copy both sides d this Elevation Certificate for (1) wmnty dk* (2) moanoe agenucorrpry, aw (3) wadM mv.
Check here Waltaftwils_
SECTION E - BLLDING ELEVATION INFORMATION (SURVEY NOT REQUIRM) FOR ZONE AO AND ZONE A MMi= BFE)
ForZoneAO and ZbneA (Wthoutiffl, corriplete Iterns El through E4. Ithe Elevabon Cadca(ea is r0idedfor use as suppMng kfomMon for a LOMA or LOMR-F,
Secion C axist be cornplekd
E1.DjNngDiagrarnNurrber_(SeIectthe hilding dagrarn mostsonlar totebuf&g for4khthis ceffcale is being cornpleted-see, pages 6 and 7. ffnodagma=ff&*
repteserts the bifta povide a sketch or phoograpk)
E2.Thelopofftboibnlw(nJudMbm=Wormfture)dtehdftis _fL(m)-in.(crn) 0 above or 0 below (check ore) the highest a*-cent grade. (Use
nalural grade, I a?).
E3. For BWding Diagram 6-8 with openings (we page7), tie ned higherfloor or devated floor (devaton b) of the buftV is _ 1(m) -in4cm) above the highest a*mt
grade. Cmotekernss C3.h and C3jonftMdforrrL
E4.ThelopdthepWbmdmvWMwdaaopWmvkNtebAftis _t(m)-in4cm)[3aboveor 0 below (check one) the higliest 4wat grade. (Use
nAM grdde, If available).
E5. Fbr Zone AO ortf. If no flood depth rmjmber is available, is tie top of the bottom iloor elevated in a=Fdance with tie commnitis floodplain managernent o*ence?
0 Yes 0 No 0 Unkwm The local cfWal mrst m* this ffkmAm in Section G,
SECTION F - PROPERTY OWNER (OR OWNERS REPRESENTATPM CERTIFICATION
The property owner or amWs adatzed representative who corrpletes Sections A, B, C (ftm C3.h and C31 only), and E for Zone A (W&M a FEMA4ssued or cmnu*
BFE) or Zone AO me sign hem The daferrv& in SecMm A A C and E are ewe to dw best ofny kv*Wga
PROPERTY OWNERS OR OWNERS AUTHORIZED REPRESENTATIVES NAM
ADDRESS CITY STATE ZIPCODE
SIGNATURE DATE TEU91HME
COMMENTS
SECTION G - COMMUNITY INFORMATION (OFrlON&) [:] Che& here ff atlaidneilts _
The local ollicial who is adaized by law or ordnance to aftister the corrawriys loodplan mmagernent adinance can cornplete Sections A, B, C (or E), and G of this Elevation
Cergaie. Cornplele the 40cable "s) and sign below.
GI 0 The information in Section C was taken fiorn other docurrentabon that has been signed and wbossed by a licensed sisvemyor. engineer, or architect who is atatted by state
orlocallawtoom*elevalimirfmnaton. (Indicate the scum and date ofthe elevation data in the Cammts area below.)
G2. 0 A wmm* dW corripleW Section E for a building located in ZoneA (Who a FEMA4ssued or cornrmnly-issuad BFE) orZone AO.
G3.[3 The Mv*V dmnabon (krns G4-G9) is provided for corm=4 foodplain rrokTornent Imposes.
G7. This pernt has been mued for [:1 New Caistuction [] Substanw Imprummt
G8. Elevation of m4x* hVest loor (jmk*g basement) of the building is. -.-t(m) Daftm
G9. BFE or (in Zone AQ) depth of flooding at the hilding ske is- 1(m) Dahm
LOCAL OFRCLALS NAME TITLE
COMMUNITY NAME TELEPHONE
SIGNATURE DATE
COMMENTS
[:) Check here I affadwyalls
FEMA Form 81-31, January 2003 D-55 Replaces all previous editions
MARANA
=/I\ 0-1
RESIDENTIAL BUILDING PERMIT APPLICATION
JOB ADDRESS: VALUATION: PERMIT #
USE OF PERMIT I
ASSESSOR'S PARCEL #
OWNER OF PROPERTY:
_
SUB-DIVISION T LOT #
OWNER'S ADDRESS: OFF ICE USE ONLY
CITYZZIP: PHONE# [3 PLANNING
APPLICANT: CONTACTPERSON: Ll ENGINEERING
D GRADING PERMIT TYPE I
ADDRESS:
13
PERMIT# low
CITY/ZIP: EMAIL ADDRESS: 13 FLOODPLAIN
RIGHT OF WAY
U
PHONE# FAX#
CONTRACTOR: L3 BUILDING
ADDRESS: L3 LOCAL FIRE MARSHALL
L3 OFFICE OF MANUF. HOUSING
CITY/ZIP: EMAIL ADDRESS:
LJ SPECIAL INSPECTION
PHONE# FAX# U DEFFERED SUBMITTAL
U BOND CERTIFICATE
AZ CONTRACTOR'S LICENSE # TOWN OF MARANA BUS LICENSE #
U IMPACTFEE
ARCHITECTIENGINEER: L) PARK FEE
U
L3 WATER METER
WATE
ADDRESS:
SEWER CARD OR SEPTIC
CITY/ZIP:
D
L3
L M
PERMIT
PHONE# FAX#
DAT
E REC'D:
ARCHITECT'S/ENGINEER'S REGISTRAR #
P PC
CF C'J
REC'D:
Application is hereby made to the Building Official for permit subject to die conditions and restrictions set forth on his/her application.
I hereby certify that I have read and examined this permit application and know the same to be true and correct. All provisions of laws and ordinances
governing this type of work will apply whether specified herein or not. The granting of a permit does not presume to give authority to violate or cancel the
provisions of any other Federal, State, County, or Town laws regulating construction or the performance of construction.
Signature of Authorized Applicant Date
TOWN OF MARANA - BUILDING SERVICES
11555 W. CIVIC CENTER DRIVE, MARANA, ARIZONA 85653
Phone: (520) 382-2600 - FAX: (520) 382-2641 D-56
REVISM 0007r2006
MARANA
UUMMERCIAL ]SUiLiLvinty rt.Km i arrutuA i ivn
JOB ADDRESS: VALUATION: PERMIT #
I
PERMIT DESCRIPTION:
ASSESSOR'S PARCEL #
BUSINESS NAME:
5EPTIC OR SEWER CARD #
MAIL ADDRESS:
OFFICE USE ONLY
CITY/ZIP: PHONE# IMTIAL
TOWN OF MARANA BUSINESS LICENSE # PIANNING,
APPLICANT:
L]
ENGINEERING
CONTACT PERSON: PERMIT #
ADDRESS: U BUILDING
CITY/ZIP: U LOCAL FIRE MARSHALL
PHONE# FAX # J STATE FIRE MARSHALL
CONTRACTOR: U SPECIAL INSPECTION
CONTACT PERSON:
U DEFERRED SUBMITTAL
ADDRESS:
U HEALTH DEPT POOLS, FOOD
CITY/ZIP-.
U ASBESTOS NESHAP
PHONE# FAX#
AZ CONTRACTOR'S LICENSE # TOWN OF MARANA BUS LICENSE # L3 OFF OF MANUF. HOUSING
BOND CERTIFICATE
ARCHITECT/ENGINEER:
ADDRESS: J TYPE OF CONST.:
CITY/ZIP: U BLDG OCCUPANCY(S):
U SPRINKLERS
PHONE# FAX#
ARCHITECT'S/ENGINEER'S REGISTRAR # J TOTAL BUILDING AREA:
U
OWNER OF PROPERTY: OCC LOAD BY OCCUPANCY:
' L] CODE/YEAR:
S ADDRESS:
OWNER
DATE REC'D:
CITY/ZIP: PHONE#
PCF RECD:
Application is hereby made to the Building Official for permit subject to the conditions and restrictions set forth on his/her application.
I hereby certify that I have read and examined this permit application and know the same to be true and correct. All provisions of laws and ordinances governing this type ofwork
will apply whether specified herein or not. The granting of a permit does not presume to give authority to violate or cancel the provisions of any other Federal, State, County, or
Town laws regulating construction or the performance of construction.
TOWN OF MARANA - BUILDING SERVICES
11555 W. CIVIC CENTER DRIVE, MARANA, ARIZONA 85653 D-57
REVISED 06107/2006 Phone: (520) 382-2600 - FAX: (520) 382-2641
owl'
go-
F-I
W?
p-
APPENDIX E
p- Service Request Fonn
0-
0-
0-
0-
LmQ
Facilities Maintenance Work Order Request Form
L..j
Mo
ON
an
Lmmj
LuZ
mm
am
me
No
U"
oft
W"
No
I"
m"
WORK25QUEST
UNIT 4: DATE:
NAME:
MONE #:
(%ere you am be reached when work is comp)ete.)
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SPECUL WORK RJEQUE?T
EXPLAJI?
BELovill:
E-1
MARANA
:Z??/ I \1
TOWN OF MARANA
Marana Operations & Maintenance aw
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E-2
APPENDIX F
Pima County Stormwater Detention/Retention Manual
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Stormwater Detention/Retentio
F-I
Manual
0-
Acknowledgments
TWmanuWvmpWamdfDr#*PknaomVDepwvnMofUnpwMm
and FloodCorWal DWict(PCWT&FCD), bySirnoM U &Amociates. ft=
(SLA) inumdaWnwMP4pMGWNmNWHBMNMkMMG4TMMI-
tMvmw0w#wdftcWnofW.CuftUmm:kP.F-,LUreM.PkmftDr,oi-
won ot the Pkna County Departnierit d I end Plood Control
DWict,MrD@vidA.Smul:eK,ManaqKL=V Planning Section of the
ftnaCwtyDepwUnent po Mr, and OontroIlDWtric9.andML
Mww&powovm*octftLofigRwWPWmVS@CbmctftPk=Cotxlp
tyDepartrwitorlIanspoi and Flood Control Dimtrict. The Project Prin-
COW at SLAwas Mr Michael LZefti; P.E., and the Project Mana9w v= Mr
Robertj. SmoWisky, P.E The R PrlnoipWdRGHw=F&VftftPWger%
and the Prciect Maneger an Mr Jeffrey Johnson.
The Pirna County Department of on and Flood Control DiWK
Skwm U & Anocietm Irm. end Rogem Gladwin end Hervnoriy, ft wish
lomicke ? P, their gra%Mappreciation to SUbCOMMit-
as d the Design Sovidards Conm*ft forthe technical review which they
pwided throughaIll s"wof#ft projea The s0corninfte, rhe* 0 byMr.
Benny J. Young, P.E., City Enginm City of TUMM, ca -0" 11 OffePrOSM-
tam frorri the Southern Arizona No= Builders Association, the Pinia
Fedembon d Homeowners, the United Swas Departrnent of Aoricultum
Agricultt" Research &rvice, ScOmest Rangeland MWWShed Research
Mine County Paft and Recreabon,,Tuceon VVaW the Armnican insfto of
Architeem, and the Anzow Society of Prolanional Engineem Through the
irpMuable convbuoons provided by this aboorriffftee, a truly uwful. pmc-
tical rnanual wm developed.
F-2
W,
Table of Contents
k9roduction
1.1 Goals and Objectives ....................................
12 ApplicaNity...-.900-.999W.69 ..... 000000 ........... 000 ....
13 Date ntion ConcOm... ................
IA -Policies.....
is Glossary of Terms ................. ....... . .. 9
is ust,of Spftft ......................................... o..o ... 12
Delention/Retention.Requirements
2.1 Balanced and Critical Basins ........................... 13
22 Threshold Retention ..................... .................... 13
23 Location Within WaUwWied .... o .................... a.....14
2A Retention Fbaslift Map ......... .... 2D
2.5 Depth tD GfourAwaw Map .............. 0 ....... 0* .....
111. Design Procedures and CrIteria.
&I Hydrology ............................. ....... . ........
pbfion .... . ........................... $0 ......
&12 Peaks and Volumes ......... . .................... 25
&13 Inflow Hydrographs ............................... M
32 Retention ....................................................... 32
32-1 Required SkmW Volume ...................... 32
3.22 Method of Disposal ............................... 32
W Detention ...................... . ................................ 33
3Z1 Estimating Detention Sbrage Volume ..... 33
3.32 'Outnow Hydrograph Determination
(Reservoir Routing) ................................ s7
3W Principal Outlet Structures ..................... 45
3a4 Embankments ....................................... 48
364 Sedimentation impacts .................................... So
U-I Estimating Sediment Delivery ................. So
3,42 Methods for Control of Sedimentation ..... 51
3.5 Criteria for Spe6ial Detention/
Retention Methods .......................................... 53
35.1 Surface Storage .................................... 53
35.2 Parking Lot Storage ............................... 55
'j. I
10419AP3-
353 Rooftop Storage .................................... 55
354 Underground Storage ............. .............. 55
aW Subsurlaoe Disposal ............................. 55
3S Basin Design Requirements .... . ... . .................
3&1 Basin Side-Slopes and Depths ............... 58
3&2 Security Barriers ................................. ?.59
3M - Multiple Basins ..................................... so
IV. MuVe-Use Concepts and
Aesthetic Design. Guidelines
4.1 Basin Siting ................................. ................... 61
4.1.1 Project Scale Sites, ........... * ................... bil
2 Individual Parcels .................. 0 ............... M
4
1
.
.
4.13 Regional F4dIWM ............................ 64
4.1A Roadside Basins ................................... 64
42 Multiple Use Concepts ..................................... 65
42-1 Project Amenity ..................................... M
.2 ACU" ReCnNdon .... . ............................ 65
42
reation .............................
42.3 pas" Rom ... 67
42-4 Urban Open Space ............................ **.69
42-5 Preservation of Native
Plant Communities ................................ M
42-6 Water Harves: fing for
.......... 71
Recharge and Re-use
.
.
..............
.
.
42-7 Wildrde Habitat ...................................... 72
43 Technical Requirements and Guidelines .... . .. I .... 74
411 Basin Configuration ............................... 74
4362 Basin Landscaping ................................ 85
43,S Erosion Control ................ -.96
43A Landscape Irrigation .............................. 97
V. Report Submittal and Review Requirements
V Submittal Procedure ......................................... 99
&2 Stormwater Detention/Relention
Report Requirements ....................................... 99
vi. Bibliography ........ . ............................................ .103
F4
1-1-st of F19UMS
Fon 1.i: Open Spam and Common Area ..................... 3
Figure 12-: PedeMi in, Plazas and Courtymis .................... 3
Figure 1.3: Roadway Embankment Storage, ....................... 4
Figure 1A: Parldng Lot Detention ...................................... 4
Figure 1.5: Regional Detention Basins ............................... 5
Figure 2.1: Definition Sketch for Example 2.1 .... ........ 0 ...... 19
Figure 22: Relen*m Fm1billty Map for
Pima County ...i ...... *-.** ..................... 21
t
Figure 2.3: ern
Eas
Do . pth to Groundw8ker, Tucson Basin
.......................................... 23
d Avra Valley
Figure W: ...
an
Example Wamshed jor. Method B ................... 30
Figure 32: Hydrograph:D"rmination. by method B .......... 31
Figure 33: Graphical on of InfkYw0utflow
Hydrographs for Type 1, 11, 111, & IV Basins ....... 36
Figure U: Wbrldng Curve .............. * ............................... 43
Figure. 35: Inflow1outflow, Hydrograph for 0100 ................ 46
Figure 3.6: Tyipical Multi-Frequency Outlet SWuctum ..... I ... 47
I
Figure 3.7.- ........... ...................... 52
Sediment-Trap ConcW -.
Figure 3B: Conceptual Cross-SeCtiOn for
.......................... 56
d Basin Fl=
i
E
Figure 39: .......
neere
ng
Typical Dry*WI InsWati6n ............................. 57
Ust oflables
Table 3.1: Rainfall Depths of Various
Retum-Period Events, ..................................... 25
Table 32: Hydrograph Rim Times for Tc::S 6D Minutes..28
Table 33: Ratios for Generation of Plow County
Synthetic Flood Hydrograph ............. ............. 29
Table 14: Runoff Coefficients L ............................ 33
Table U: Synthigic Inflow Hydrograph for Example W ... 39
Table 3.6: Stage-Storage Relationship for Example W .... 40
Table &7. Stage-Discharge RelationsWip for Example W .41
Table 3S: Swrage0wharge Relationship
for Example W .............................................. 41
Table 39: W6rldng Table for Example &I ........................ 42
Table.3.10: Routing Table for Example W ........................
iV F-5
Introduction
F-6
?. f I
i. intWucfion
1.1 G and Objecbm
MW pXpope of V* manual is to estalfth unklorM policies, qMeria. and
ofstornmvelor ft1h ? ItiOn
beilities within Pow County and the City of Tuesm It a wooded that !Z?
Sonketerdion Indlifies; 0 in accordance with the guklelinss presented
look wMnwWfttimftgoftl)kW$PKWN*sW*Pk=C=Vandbr
.,city d 1"on WMWgWWII Ordinance provisions vft regard to
SNOMWAM ---- -- ftWWn;2).fnWin Ist-fio-Oft Iscilifisewhich
womwo-mwwvbumNyappo@iWaanct3)wmre#othei.ow.-oivtonnd
stormweW alsifin facUss: will not jeopardize ft quaky of groundwater
resources.
Asummmyof PONGIOSSIXI 0 *60 IS IsPfOvkW W10113 SOCU00A. kbkw
ponWthat.thbmwtlionbetomugMyroWwWwapbolyurAwalmd
prW,pgppMM#wd@WgnpumdurnconuhudwOdn#wboclyaf#ft
mortual. One of the major ob**m of Wo manual is to provide guidelines
towwo snsLftg #0 ban eista-tiorWasention facilities will be planned and
designed in such awaythattheywill be cc, wicle eflasarroMesbytheaffamim
community. in the attempt ID achieve this goal, Chapter 4 provides detailed
poWnwWcrftft agniftgftWadingandiandscapingot deters-
bor"WaM basins for Mutliple tOM
The technical angibeenng detalls associated wo ft analysis and deep of
the naterial cwmhW within these chapters a targeted for use by practicing
engineers in the. weler4asciurces W or othar individuals with equnalent
knowledge ortraining. Consequently, an understanding ofthe basic
of k*abgy and hydraubcs has been assumecL No sh m, ip 1 has bow made
lodiso the#wKwyardwivabonsofthemox)dspammi-1 hersiMradma
simplilied sapby-s" apocach is p a a a in A Sft additional inlormation be
dand.ttwuswnencowugedbwrm*thesokc*dndwwmrWpmwWod
at the end ot Ihis manuaL Additionally, a w:hnicklenenvandurn which des-
cribei the medwoologiss used in developing many ot the equations and pro-
cedi presented in this manual is, an fie at the a Hi c P mof the Pima County
Flood Control District and ft City of Tucson !Epginwing Divisim.
1.2 AppficabUity
The methods and policies presented within Ihis miuvial am applicable to the
pkuu.h and design ofstormwowdefention andretentim *MitieswithinPima
County and the City of Tucson, Arizona. Due to both the hydrologic? corripiex-
ities with IaWvvatersheds "the desireloerm nsimplickywithin
Oft-manual, the methods of Ndrologic and hydraulic analysis presonled wMo
Chapter2 and ChapW3 shn dbeappliediDwatershedshrvingdrainegen sm
no greater than one, squore mile unless spwft authorization to ft contrary
is granted by, the appropriate reviewing agency (W., either Pima County orthe
City of Tucson). Detention basins which is= runoff from upstream water-
sheds VO are greater Ihan am scpjam mile in area shall be considered as
F-w7
,W,
regional bellilmes, arid gerwrally will be Plamsd WA desigried In corilunction
1--- -814 swan or
with b", Fil If OF A IARP flood cdf*W Ftlecte perfoinied
underthe dimobin of Pirm COjMy orthe Ckyof Tucson. The channe6muft
proceduresp one ft in #ft manual Ouch as In Chapter2)wo XOc" on.
ly ID VAMsheds of ton square min or im For MMUWNIO greaW than jen
square WillbSe WWO SOPhiskated nv&gwmWW Ago g Of VAd@rshgds is
foquft&
godi wWffwftkmcDn-
COMisdwil Is -filitilDbeapplo"c*lDftpiwo*lgw'ddmdgnotd@W#-
Falketertim bollifinwhichhUmcepi: A mal mg m aress no greshirtim
ow Square ffft For#* Phnft and design of re gic md facilities, the reader
is-91W. lDthedooknwtwdlM-GWd&mfcirtaDrAMqxnwtafPAoonW
"imple-LbeDelentimmmis Hm - Basins In Pirm County, ArtmmW' avabble
ftm#*P=aCairtyDepwwwtoflarapwmmwWFk)odOonWOMrieL
Lbeafthismanual don notsupercede" noWforaoqdftvwkKx psi dm
FSW*.Dd forthe conWuodm and mps On id at@ woo nA@wgb.%dM%LTh&
leaft is advisedthal: such pmo. werequiredbytheStalowdbylocalgowerm,
M agencies.
13 DeWffionRetifton Concepts
One of the LwwjcWabW Coi asquences associated with the uftnizoon of
is an' in the frequency, magnituft arx! vokmw of nxwff
frOM PISVOLUdy UnCleveloped drainage areas. Problem associated with
devekPlient inckide Increased flooeft, a asic ID public and prMo irn.
P%Pvvlp and dlininishing adequacyof s1orm draft wW cLftftlb owway
theincreass nnvff.inrecognftnofthmpmMwMpbmCwjniywWthg
Ckyol'Tucson ham MVbffwftd dew to " M go requirermils,
as one of ixbm Mmmaar mwMmeM through the bdusim of
Specift IWM I mun rOqUilenlerlts VA*1 their respective fkXX#ABM
ordinanceL
Themicep ofskmmWdmrbmkwo?mft*mpamrysOmpoffumW
for sLft"Lowt velesse, at coreolled tate% kft dowts"m mw"wm
symm Relentiori, hwever, c coots of ft, on-ft Wrap of ruriaff whid is
rot subsequer* dischargad into a d&mmomm W reew way
be=mxmdW vulpow-vow opm No -,doriveslicre4imordrairiedift1thesub.
khomm- baftswerrierelysingW
purpose (m. for ftod-co?, only). Homm it is much more kvofabkk
ftm both a social and soomme suMpointf lo pmvide rnultiple-use facilities.
I beJOK and 1111511mWon Fq?rn 1.1 101AW108011 GMTPWCfMWbPW
use demmor*etermon concepts which have been suoOessW mg*mwrftd
thioughout the country.
F-8
I
Open Space and Common Areas
Landscaped areas and common areas, typically provided in conjunction with
high-density residential areas, provide an excellent opportunity for deten-
tionlretention of runoff. Such functional open space may be employed lo meet
rezoning requirements.
Figure 1.1
Pedestrian Plazas and Courtyards
Similar to common areas in residential areas, pedestrian plazas, courtyards
and landscaped areas can be used for stormwater storage vwfthin commer-
cialfindustrial areas.
J
F-9
Figure 1.2
3
0 C)
Roadway Emberikmeat Storap
When feasible, use of a roadway fill slope as an embankment provides an
economical means of sWmwater storage. This concept has been termed
"blue-green" storage in some areas.
Figure 13
Parking Lot Detention
Commercial and industrial developments which have large parking lots can
vocally utilize these areas very economically for stormwater storage.
Figure 1 A
4
i
F-10
Regional Detention Basins
Large-scale detention basins provide an excell
regional park facilities and permanent ponds for
uses.
t opportunity to develop
?reation and open-space
Figure 1.5
1 A Policies
This section provides a summary of the general poli(
detention/retention that are in effect for both Pima C
son. The reader is referred to the current Pima 0
Roodplain Management Ordinances for specific re
propriale staff for relevant departmental policies, incli
not covered in this general document. Many of the
section have also been included In appropriate secti
manual.
ies relating to slormwater
Dunty and the City of Tuc-
unty and City of Tucson
juirements and to the ap-
ding site-specific policies
policies listed within this
xis within the body of this
A Balanced Drainage Basin is one which ha s been identified as hav-
ing the potential for a severe increase in hazards aasa result of in-
creased urbanization within the basin. Sftto 4
detentionfretention
ater
facilities shall be incorporated within all new ;
to the extent
necessary to ensure that, at a minimum, the P
development 2-, 10-,
and 100-year peak discharges from ihe ite '11 not
ite will not exceed the
predevelopment values.
A Critical Drainage Basin is one h ich has
w 1' n identified as already
s 1 rult
having severe flooding problems a a It
existing watershed con-
0 facil
tic
ditions. Stormwater delention/reten i n Ii
i s shall be incorporated
within all now developments to the exte . nt n to ensure a reduc-
tion in the existing 2-, 10-, and 100-year peak discharges from the site.
The amount of reduction reqWred shall be inod by the regulatory
agencywhichhasiurisdicbm(i.a.eftherPirn t County orthe City of Tuc-
son), and shall typical" based upon theflow capacityolacrifical chan-
nel reachorcritical drainage structure locatec downstream ofthestorm-
water detentionAretention tacillf*s.
F-I I
5
0011
Suonwaur detention criteria. may be waived for certain developrrients
#wm@a#*hYdr*lo&cdlw Pesetas withinSection23cf0ft
mariusf. with approval oftharegWWOory'
Storrnwater detention requirements may not be waived Ifthe proposed
drAgopwwaiBbemdwWiinaeddoWboWnwWanypig tin ofacrMcal
chmW reach ora critical drainage structure is loicaled downstream of
the devsioprnerit or K Ow conditions exist which Itie, County or City
Engirmw deem juM" for nquiring dGWIML
Thresholdretentioi @)sts a which retain. atamW*numth0Vokffn@ft
difference betann the developed and socioti g2jewnmoftoMiedif-
isrence In peak discharges. whicheveris greater. shall be Incorporated
withinallnew- which Mae t"thwe 0 in
ArWm=W"dewbM*MWWOMOM=mindmwhichhu
adwwitytmfioamtmftperdembpodwmwW#Wwobcaled
within a watershed which has not been.classffiW n a wftW or.
balanced basin.
Ttreshoid retention Wsterns which retain, ataminimum, ftvolwvWft
ddlemnoe between the developed and existing Slear nmff orthe df-
ference in peak discharge, whichever Is grea1w. shall be incorporated
within all now I .-iopmeto which mod the following crWW
All commercial orindustrial developmei dBlargerthari ons acre in
stm
ArriraWdentioldmWpmwttMW#momacnindowR has
a density greaw than six units per developed acre.
Any residential developmerttlorger1harioneacre Madewhich has
adensftygmaterthantmwunftpwdevabpedwmwW#Wwo
located within a watershed which has been classified as a critical
or balanced basin. This criterion may also be applied, at the demo-
tion of the appiqxift reviewing agency OAL,.~ Pima County
or the City of Tucson),* Io drainage basis which hm not bow
prevbuslyidenWied as being 41criticarl but am notcum* oon-
sidered suitable for additional urban development without mom
Viorough-study.
in locations where stormwater retention is not feasible due ID physical
constraints(e.g., closepioxin 11yof bedrockorgroundwe". the lollowing
addoonsi detention requWaments maybe' ipaso Inlieuot1hreshold
rellentiom
TM detention requirement will be, at amilnitnum. the diflerence in
vokmw between the developed and-the win-11 2-yearrunciff
volumesorthe dfttence in peak Worm a got whh*~is more
tesVftmuft#wdftmfminvokmwWftpeaksbft~#*
developed andft oded ig SymfuiuRvolumes beftthenw-
imurnlobedetained.Themaximumpe*discharg a In be released
from adeftntion basin Isone(I)cIs Inadminapbasindesigriated
6 F-If
"/.P- X?
-0--
- i"-
as -bawme-ar-witicar, WW#M (3)CgBina non-designated
drsinap basin, with axcepWns IND be determined by to PiMS
C=Wor Cltyof1ucson lEngineer. The 2jWd5jW-WWiaSh&1l
be applied in the same manrW as it Is NOW for establishing
ti.resholdraw recluirements.
Detentionmontion systems which utilize a method of subsurface
disposel(eg.. dryw" arpneeredbasin floor-, trenches, stc.) shall be
booodwjch#vdtherdbMmmx*wwMboanw*numchunce both
horizonIally, and vertically, fmm'arry functioning water well.M* Pima
CountyRoadCwtrdDaRktor#wOtyofXcmEngimwMDWiwn
gxwWbocwftctedmgwckrig#*aWUc"wkefttobeuwdibrft
specific tAv of developmOrt proposed.
InNIDOO, rates of dryweW infiltrationtrenches, orbasin ftoreshall not
boused as CUMM now in **&roWV pocedwm
OrrhrwdftfdmftftWMdnotbeaNowedonelmn whichdrain
a catchment area greater than 100 staridardscres In size upstrum of
ther'sis No k0sin outlet uniess appovel to do so is first
granted by the appqxiM reviewing agency (LL. ~ Pima County
or to City d Tucson).
The use of rod"s as dorege arm for runoff is not an acceptable
methodotmestingthed-1
or the City of TUcsorL
Individual lot-storage systems within single-family residential
developnents are not acceptable for meeting the detention/ retention
criteria of either Pima County or #* City of TucsorL
- . ntenance of kxmd detentionhaiention facilities, provided in =junc-
tion with now shall generally be the r@qxnslbW of the
pfivM property owner or neighborhood associatim Records of annual
4 Vini. Onance procedures shall also be IaW an fie by the prWaft pruperty
owneror neighborhoodassociation for p s - in dil, mviewbytheappmprim
agency (ta, Pima Countyorthe City ofTucsbn? The aWap intp review-
ing agency *0 also reserve the authority to Periodically ? wpm
privately-owned 1- t- facilities to ensure satisfactory
,nairmumoe is being provided. There may be instances where public
ownership and makftnanw maybe appropriate, and *0 be handled
on a case-by-case, basiL
A== shall be pwided to all dftfflbnkWMI*M 118CMUSS, as needed,
jormWrAsnanoe piposes. The appmpriate wAr**q agency (La.~
pime County or the City of Tucson) should be contacted regarding
specific access requffements,
Channel design, in co*ncfion with
beunderWQ0nOn1Y8fWfMg"0Q 0i 1 010 110th9*AlQWftMc0m-
rnended hiwamhy. 1) natural channels, 2) channels with grade-controll
Structures, 3) U"W dMMWW In other wofft a natural "vW
design should be conwdered, *sL unless stabift Moblems absolutely
dictate the need for grade cwwtft or full channel lining.
F-13
4040114
7
DetentionMetention basin shouldbe cle sig -a forrnultoeuseswhere
f9asible
Grading
OftchaptwwtdwWdnChopler4.,All;pi, 01 graftgordinsincesand
policies of #10 appropriate reviewing agency shouid also be not.
Landscaping of Implillme shouk! kwmpcm the
damig mftfteftRbWWwlthlnChapW40f#ftffm%mL
The Pirna County or City ollbeson Parks and Recrealon Deparenent
Shouldbe fogardingp mpmendslonnwalerdebsiftshmenfion *W7
in designated pubW areas within residervW compiercial, and kxkswW
fds.
The pofidie% criteria, and requirements alml 1 r wlthk #ft ummual are in-
larided as minirrm standardL Mom spedft or restrictive requirernents
,nay be daveloped. for kxlvkkW watem*wds In coqui ctb with the
undertaldn of spwft basinmmagement studift ramming re-
9
quWarnerds,arealAsnpolicie%orm.n. un*Ompolicies Thespecific
requirernents developed as a part of any mll hent plan that
may be adopted by either Pima County or the City of Tucson shall
Suparoade the more g el requirements p to widin this manual.
F-147
ISGWMIrYOFTOMIS
The t*MWV OMMY=ftbU 1111111 whid =ybetundMroqqhcutVft
frMIUSLIncerlahirMUMMIlhOCIII _1110111P Mida"MMOSMSIPSCft
notob of the farm as; k Wused willik Ahe menueL
Belanced1lasin-Awasershedor which ties been kiwi-
filed = having the potential *W a sievere h in 200 huafft as
aresultoMmonal urborkatioriwiliftthebasin.:
Basin Floor - A roWilled volume within the bottom of a storrnivew
sic ognbeftwiddssWWtrftpurpmofWrporadyslxftnmoff
and subesquently disposing of same by the p d h MP - fi c into
thesubsurboa.
%O9919WRIM"MaPoInt-Ahyd clogic ~dnmm Ih 1 1 mW
wift awaw*udwomrottwsLrkmdmbmpislwboar&Vjo&
CItIc Desin-AwateadWorsubawammi--l-awtichhmbwnidsn-
IW as having eavem flooding problem n a result of adsting waw-
shad conditiom
Oukvn -AsIx4 closed cor" 4Vic* designedlorconveift low
thiougi an embankment.
Dralnegellesin .. Ageographicelareawhid rm oblIllesurfsoeruppoff
loaparticularpointotil-ke on! Theam'Visihmpbasin! and '%vow.
~'amused intelchm gemblywithinithis manual., . ,
Dry W69-Anerigineered hoMwkh grated Inlet desig w losocept
which re immediately above the groundwater toble
Embenimmd -An artificial mmind of earth which can arttD Impound
waist
Eineigo FSpMwoy-AncuMowspUMWfromasormwateraWmge
lecility which -is provided to allow lor the safe over1low of floodwalem
should situations am #uft were not talan kft account under norrrial
design assumptiom ,
Flow Hydrograph-11WfunCtiOnSl sistionatipbetweeritmeandflow
Clischarge, as observed at a particular point within a wMmtmKL
Hydragraphs an typ;cany represerrW graphicaft or in labular
Pook-Themrgwvwueofthefewdm*wpwhicho=xsdLw-
bVatmdeveMasobsertvdatapanicuWpointwkMnthowaamhsd.
Flood PAu" - The mathernaticei sirmistion of a tood wave as it
mom downstream tivough a watercourn or dewn*m basin.
F-15- 9
WX
"M
inititratim - The ffmornent of water through the surlew of the soll.
in #ft manuel, theierms llpercolstiah"wg "inflitrabW will be used in-
ts cm-- im" strictly Speoft the Win --percoiatiw 6
aft movementatwaW throughsollabalapiL, water! Mh oil, i
through the soll swfaw and F Fin IN - Ilwough, the underlying
kdftaft Tmwh - A xdAM Vsndi6 p=W* tai d g a per-
to so pipe, Flesig w Jorthepurposect lemporarilys0ftrunotand
then subsequenoy dispoeft of ft bw the subsurlace by infittration.
WMaw-Runaff which ftm irwaslormweler baltyfromthe
Upsuearn W&WSIW&
M1101^wpose Main - A basin whid pmvkW
h a, Ifim in efidj& f tothepikawy tunctionctilood-1h Such Ih a allm
may Include recrOMM, water harvesting, visual buftM or parldng.
Off4Jn*D@U,vbo. Mis Itic i Basin -A sWffmmW sMP bdft
whid IsIM1,21, "
nottowdftcdy,bfttheba*Q.k*WlDtaboinistioalya=npWi-
ed by mum of " weim
x
On4Aw Dow H, n/Reilention Basin - A stomiwaler storap ftWity
which is within the path of a watercourse, and ftMWWi=*
its - P, impts the entire flow frorn the Upstream WSUUWWdL
0114ft Drainage - Stormwater naoff smansting from remate wns
which aftct the she under invullgation.
On4ft Dishup- Slommater runaff which emenew directly from
the site under invesfigstion.
Offlm - A small hole designed for draining a slonewaft storage
facift.
Oufflow' - Runoff whic: h oft a xtomwMer storage Iscillty by means
of an outlet sbucturL
Outlet - The point at which stormwater runoff flon out of a deten-
tiontratention facility. Dullets may ca , nist of cuhaft weim orifices, dry
waft stc., or any combinstiort thereof,
rragnituft of flood should be equalled or ownded at least once (ea,
a flood magnitimse having a mturn period of 100 yam will be equalled
or exceeded. on the avenigei once every IOD years).
Rise Tirne -The Wne interval trorn Vwbegkwft of runoff tothetirne,
of peak dWdwg% as iqx.!!l 1 riled by the Good "Waph.
Scow-Therernovalof rnaterialfromthebedandbarftolacharind
as a resuft of flowing water
F-16
sedmwo mw- An amwtwn astormwater storage WORY Which is
dqsOWjDVW the majorilyof inconting sedimentsiorthe purpose of
ngftenance.
sup -- The-height of water within a swmwaW SWW faeft, as
measured above an established daturn.
,SW=wWoewomBnsln-Abcft~WnWaftswmsw
jWqfUr4ffwWVm nommimftataco-bmlgdnothroughapmftWe
WOOL
but is not provided with a posilin OWN No flow is dscharged directly
inload"nslyeamwatercoursefroma: @t@Lfjn bs*4WWWb&dfakj_
edintothesubsurboebyli-Mbefign.
&tmurlmDUpMO-DrahMPofgtxffwmwrwwff inlotheautwur-
taceby#Wprocessesofinfiltraft-and --- . This may be ac-
co iplish m through use of dry weft engineers I d basin Illoars, hAtr&-
tion Vwwhm SIM
Threshold p.9jenthn - A provOon Which FOWWOS IGWIft of the
volumetriedftrence, orthe dfference In peak discharge. whichaver is
gfeW94 between the pre- and - c note nxwff volumes
for the 2-year to 6-year ftw ovw*L
Thmof-- runoff ipt"
ftm to hydraulically most wernote part ofthe drsinage basin tothe point
of concentration.
Trash Rack - A metal bar or grate structure located at the, rM of an
orifice or cuhnK and designed so as to prevent blociage, of the kft by
6borne debris.
Ws& P=d Crested) - An opermft"I control sectim, with a
horizontal crest above which fluid pressure may be considered
irldrostab.- ft-is normallyplaced across a strewn or a ditch eltherforthe
purpose of divefting or for the purpose of measuring the low of water
F-17
W11-
1A List Of Symbols
A Watershed area
C? ftectional portion of a drainage, basin which tft"S
ssdirnsM
CW WAsighted runaft coafficient.
Owdev Weighted runoff coefficient lor developed sft on COUR -2
Owec Weighted runoff mfhc*srd for existing SM condidom
nb Watershed basin tact=
0 'Detention basin,oulficK
PC del2thatte.
Pn depth for n"ar slorm
Pt t4ow rainfall depth. for 10DIm slarlm.
P, bmkwur rainfill depth.
q Discharge at tirne t.
a, Detention basin k0w.
00 Peak cuffim frwn detention basin.
Op Peak discharge.
S. Detention basin Map tois, particular routing *m interval.
T Flow ?evef tim
t Tkne from beginning of runoff. 7
TAB
Flow IravW *no beftmn points A and B 'W
tc Tirne of concen:tration.
Tr Hydrograph rise Wne.
TV Rise"a of the IW"ar synthetic flood hy*cgrsph for or"Ite
drainage.
Tra Rise time of the IOD-year synthetic Good hydrograph for an on-
tire wetershed.
W Routing Irne Interval.
v Runoff volume at *ne t. low
V Runoff volurne.
Vd Estimate of storap voWm fwpred for determon.
Vr Required storage volurne for retention.
VS Estimate of total required stomp vokane,
VSD Additional detentionNetention basin volume required ID ac-
count for sedirrientation irnpacM
12 F-18
-4-
Detention/Retention Requirements
SW
11. Detention/Retention Requirements
2.1 Balanced and ClifiatI.Basins
wsWsh9dswtfthhsvebwkkr?..
aWassonralmadyhavhvsovwetmftohazwdsorhavkKgai highpro.
babfty of increased lood hanuds; as a result of futLn urbanization. Skan-
wmr Is i - nd - -_ ?voiftsisnxpjkWforabnowdvvokgowup apanedwithin
both Baknced and Critical Besirm regardlessof size orland-usedenalty The
appropriate reviewing agency should be contacted for a IM of basm
designated as critical or balanced and maps showing I m p alk lafthebasins.
The futun classification of basins as "brilicar sWl 47WW be dom so in
cw*xcbm with ba studies of the affecled waftrshKIL
Balanced Basin
A Balanced Basin is one which has bow idet ifffied as tw*V the polen-
tial for a severe increne in flood hazards as a result of Increased ur-
bwtmbonwiMhthg.bamSommawr-in-im- k -M16clifiesshall
be incorporated within all now opno lothovels inscessaryID
ensure that, at a minimurn, ft poskWvskp 2..106i and 10"m
peak dis&argesfrorn Vw sbvM not excip the- IwIt
concWjwsL
Crft" Basin ?
ACriticalBosin isonewhich has been WsnIlW asak9edyh@:Wngs9vm
Gooding probleam as a result of axWft wMrshed condbonL Storm-
water detentionhatention hwilifies shall be h scorpoi within all now
lopnents to this vftM necessary ID ensum a reduction In the ex-
bft 2-. 106? and 100-year peak clische gele from the oft The arnount
dndLicbmreqtwWsWbedown*wdbythereguMearyagenWwhich
has ju?on (Pirna County or City of Tucson), and shall.1ylAcally be
ba upon the fbw capacity of a critical channel reach or critical On
drainage structure downstrearn of the storrnwaser detenflord
retentiol facilities.
22 Threshold Retenfion low,
Threshold retention systerns; must be incorlmrabed within residential
awhftwokWftnowaminaftwOpWN Wthres
armore unitstoftacre. andwithin villconvrnmclal orindustrial drielopments
is m**W in ordetto mftft
ft offlects of urbarbalion Mw Increasing1floofteervolurnes, as well astw
ft purpm of enhancing grol-o Id' _aWrecharge potential. ThersWith w
quirernent will be, at a minimun% the volurneft diberence bemwn the
developed and im dili g2jearrunoff.Thevolunotric dMerenm betwes. the
develloped and existing 51m runuff will beft rnw*nurn e qui a to be re-
takved.The2"arlx_I ? dischargermustbeallo-'s loexitrawt-
*m UcMW% If It is necessaryloinaintak dooffommm.ilmis; vegetation.
The 2"ar #ireshold mWftn enterm shall ap* Io ft fol1low" Vw of
F-20 13.
Any rgsidentisi development larger than arm acre in sin which has a
density at three 10 = units per developed acre, arW that is located
wMmaws*mWwhehhUriOtbwndnoossaaftWorbWwwod
basin.
The Syserthreshold retention crilerlashall
of
AlcommwciaJorkxktWWdevobpffmftlwgertunormacminsiaL
Any rasift" dsveWpment larger than am we In aim whicl has a
density greater than six units per developed acre
Any residential development larger than One acre in-stm whid has a
dwm*ygioaW#mlmwwftperdwWoWaoMarid#W is located
wilignawatwaWwhici hegbeenciassifisdasac Idulorbalanced
.basin.
Threshold retention requirements maybe walvedin certain whenstorm-
water retention is natUasible due to constrainIs imposed bystfturface, con-
clitim -a (W close p=dmkyd bedrock orroun"vlsrlabls? In such cases
the fo!Wa" detention criteria may be Imposed In rou of 0 ireal retention
0 q, 10ionents, and in addIltion fa any other applicable detention requiremerft
T.h&CMOfWMfDQL*OfratWItbe.ataviib*I Uff4thOdIffOINCOMVDIUMO
betmen Ow developed and the oftift 2"ar funalf -volumes or the
dwerence in peak discharm wtfthever is mom festrictive; with the dif-
ference in volume andfor peaks beh"en the developed and the existing
6-yw runoff volumes bo*Vthe ffmmT4xn Io be detained The nadmum
peak dbetwup Im be released.frorn each detention basin is one (1) cis
in a dralhao basin designated as'"balanced" Or 'tddW'* and three
(3) cis in a norrdesignated drainage basin. with O=Pdm 10 be dew-
mined by Pima.County or the City of Tucson. Apercolatin Itestandlor
hydrogeological site analysis is required to validate a request for provi-
sion of on-site dehmon of runoff in lieu of retention.
22 Location Within Watershed
The criteriapresented within this section ofthe manual can be used to deter-
mum if wormwater detention requirements may be waived for a particular
developmwiLincertainchal c- i non, urbanizationof parcaftOf lIndir, '110 1
at the wro s downstrearn end of a watershed will not.waft Increases in
flood peals beforethe ftw has er ored a "major ctiahnel:'where the effect
upon arty potentialincrease in the peak f low rate ofthe "major charmf" would
be inconsequential in any event. For purposes of this anO^ the Wm "me-
jorchannel"reler ftwelercourses having drainage areas of IM square miles
or wwat #* point that the criteria provided within this section is applied.
This hicludm but is not necessarily hmftd tc? the Iollowing walercmam:
Santa Cruz River Tanque %%rde Creek
Rdft Creek Brawley Wash
Pantano Wash Aftar Vftsh
Canada del Oro Wash
14 F-11
45
Howeve; when applying the criteria presented within On section. approval
by ft regulatory agency which has Judedictim war the aNocted portion of
the basin in question must be obtained prior to the eMselfication of any addi-
tional waWcourse as a 61naJor chanrW:'In certain instanom approval may
be g a - to for otter w@Wcourses which dernonom adequate downstivarn
capacity to convey the IW"ar flood peak to a logical do%vristrisarn conclu-
sion under contlitig -a of ultimate watershed urbanhztion.
HeItWoneaffiewooc pion to withinthissectionaremisfixf,storm.
water detention requirements nay be wamd lor specific developmentL This
aseWnapp0monlyto=mw&WdoWftn.ThmftW.Mmift requirenients
WWI remain unaffected by the applicalim of these criteria. Additionally. as
pWWcu* s,tftd, slormiivater detention requirernerits may not be weived If
the F mp Pi 1 1 development is located wifti a critic.4d basin and my portion
of'scritical chennel inch oracritidal drainegestructize is located dwmutivarn
of the development, or If other condftm exist which ft County or City
Enginw doom just1flable for nx;uiring detention.
owl
Criterion I
Slormwater runoff discharges directly frm the propond developmerit "W1
into a wahmourse which mwts the criteft of a "maW charinel." as
defined in Section 2A
CrIterlon 2
A . Equation. 2.1, as expressed bebK is saffisfied.
B. ff the proposed devalop? is located on a secondary tributary
channel of the "major channel" (e4l?, Channel #2 of Figure 2.1)
then ft Must be dernonstialedthatthe SeconderytributeryLtWaft_
quatecapw*iv conveythe future 1OD"arftod pe*emwwft
from1hat o1submmiters! wlichca doinenotonlythepio-
pond developrneM but all areas; upstrawnthered. For instance,
aeginen 9C of Channel M In Exampie 2.1, must haveadequate
capacity to convey a 1100"ar load peak onanating frorri those
weas draining Into Channel #2 upstream of Point C? band upon
conditions of ultinuve watersW urbanbation. Howeve; in Oft ex-
ample, it would rot be required to demonaVale go seWnent AS
d Channel M had adequate capacity, since ftwd peaks would not
beftreasedontft'Vrknarf'trbutwyasarewkotthopropos-
*d development Q-e.. provided Equation 2.1 Is satisfied).
Note: For purposes of this manual, the term "primary tributary, nigers
to a channel which flows drectly.irdo a -4 major chwiner A secondary
tributary is arm which Ion directly Into a primarytributery, M streets
may not be, c a -eir's s as #Nxdari*L
F-22
Equation 2.1 is spessed as tDoom
T+V :s OAD
Tre
-Equation 2.1
Whom
T IDD"wfmvftvd*rwb@Wmm#wdmnonmpoktdthoprt)-
pmWdvwbMMMOV*mduwmwkhawMrmmwhich
nwmftthecrbeftofa'Wmiorchannsl,"asfI Il -a ln,S+ecdm2.&
The penwvftrTshall be ealculated bymwwofthe -Incremw-
taltimed method," as Illushood1h Example 11 of
this Manual.
Tr' Rim time of the IWIM syntheft fbod hydrograph for on-oft
dminage emanating from the proposed development (for
developed condltions?
Tr- Rise Ww of the 1W"ar synthetic Illood hydrograph -at Its cona
Suence with the "major channer for drainage emanating from the
entire watershed. In this Instance, Tra shall be debwn*W using
the assumption that the entire wwerWW is fully developed and
PAL, it should be assumed that no stormwater daterw.,
tionfretention tacilities presently exist, or will exist in the fuum
within the watershad).
Note: Equation 2.1 sW only be applied lo W having
dadnage areas equal to or Im then Son square milas at a con-
flusimpointw4ft a strnsim chainfW0 air= the 111frithift flicW
hydrograph:used ior this analysis begin to lose its applicability
as the watershed inowses In am beyond this WnIL
Peak clischarges and times of used in On analysis shall be
caladated bythe Pima County k"M method orthe CllyofTucson Rood
Peak Estimator Procedure. Hydrograph rise ftes shall be deten. bythe
method to be subsequently described within Chapw III of this nmnW.
F-29-
EUMPIOLI
AGDecreparcel.p Rpone brhWk1VnSltYudWndrVVkVnWMiskxW&d
Intheemen pa fin ofa4033-acresul)w usM ml-s i-tafftRIftCrooK
whichhubeenkle dfie-1=11301a me
tion may be waived as a condition of development (we Fgure 2.1).
L AppiyhV Crbwhm I
The parcel don notdWdwp directlyinmia, "nup dwmel "p&.Rift
CreelQ; 10mefore, Criterion I is not safieftd. In #ft inswrice, Crilerion,
2 must be examined. If Criterion I hod been salisfied the deontion re.
qUirement would haw been waived, and no further anatpa would be
necessary.
It. Orharion 2A
Calculate T, By application of the Pun County Hydrology K4ethod. the
fORWAV Imes of concentration- we calculaied lor fully4evokpod
waisroW ca clitim
Channel #1
te at POW A - 61 min.
tc at Point 8 = 57 min.
Channel #2
tc at Point B - 25 min.
te at Point C = 17 min.
The travel time through the reach of Channel IM bcNed between Poh
A and 8 (TAS) is calcukod by subtracting the Imes of conoemation at
these two points:
TAs w 61 - 57 4 min.
Thetrevelorne throughthe reach of Channel #2 localed between Points
8 and C (IW is calcukded in a sMnUw marmer:
Tec - 25 - 17 = Smin.
The total travel time M for use in Equation 2.1 becomesthe sum afTA13
and TBC:
T = 4 + 8 a 12min.
Now Incrementaltravel times are calculated for each channel
located balween the "majorchannel" and the suloct ppm?awwrnw*.
travel time (T) is theri adculated as the sum of the incremental travel
&neL
F-24
17
Calculate Tr':
By applying the Rma C4xmty Hydrology Method to the on-she runoff
fromftSD.mepamW(anumingdevokwedeancNm),a*mdcort-
centration ot Sb( minules is obWn9dL This corresponds to a rim time,
an the synthetic food hydrograph d 14 minubm
Calculate Tr":
AvaluedTr" = 53 minutes Is calculated forthe entii*4033-acre sub.
watershed at Point A (assuming fu waWshed condi.
tioneNinthesamemannerseV was c@Wukftd forth* SO-we parcel.
Substftufing T, Ir'.. and T.- Wo Equation 2.1 yielft-
T+TrI -12+U-OAD.
53
SinoetftvakisisgmftrthonOAD,daMUbnmqWmnwftwoLdd not
bawaindfor#ftdewWpmmlnadd0n%ltftvakwbWbnnlm
than orequal toOAO, the delention requirementwouid only have bow
waived K it could be demonstrated #0 the capacity of the reach d
Channel #2 loceled berasen Poinis B and C would be adequaft to con-
vey the future I 00opar flood peak predicted to oocur along this reach
which emanates from the dramage area aftualed upstream d Point B
(iAL. Criterion 213, as described an page'4, must also be satisfied).
F-23-
Sample Watershed
for Example 2.1
scale Iff=4000f
Figure 2.1
61 . d,
Channel
#1
f-.. (Primary)
Channel
#2
(Secondary)
Proposed Development (60 acres)
C
Total watershed area
at point A=4033 acres
A
Moor Channel
F-29-
w"
19
2A Retention Feasibility Map
The Retention Feasibility Map included within this manual (Figure 22) is in-
tended as a general guide forthe planning of maroon rysterns which include
facilities Jor disposing of stornwater runoff into the subsurface dry weft
engineered basin floors, infiltration trenches, stc.). The Inforniation on soll
PVrm9ab#ItY rat" is vOTY OfflOrWind, and is not intended to be used for
design purposes. Pjdhe; Its intent is to provide an indication of tha miative
fessiblity of uWbft Infiltration facilitin for stormwater disposal. PercoW,
'bon asts will be required an a site-by-site basis to obtain permeability raw
which are to be used for final reandon facility design. The permeability
ranges provided herein are for near-surface *oil* only (iAL, zero to five4cot
depths). Therefore. tl"we not applicable to dritwell systems. which typically
penstraft into deeper so ate.
20
F-2?-
19
FE
w
V)
cc
w
CC
im
Ir
w
C-i
rr
LU
w
rc
w
cc
0
>1 0
A
>
rL
0 ve w
o CL ca m co CL
cc I-
! :2
0 ISO CL
.2
0
co
C
0 2-0 LE
0 0 0 o 0
a >5 co E co E W
U- a - "I A 'I
0 CY
C?
D 4)
I-
4-0 = cm
CD cm 4)
X LL -j
t
IW7 0
z
Ll
low
r-=z
ow
dwk
ow
mwq?
4w
mm
wkp
25 DePth 1b Groundwater Map
Figure 23 provides depth to Wound water inbrmadon for eastern Pima Coun-
ty and the City of Tucson. This map Is provided to &W the reader In assess-
Ing retention basibility with respect to the criteria regarding the proximity of
retenti ' on-facility disposal points to the groundwater table. This criteria may
be obtained from the Pima County Flood Contfol District, or the City of Tuc-
son Engineering Division. Figure 2.3 of this manual will be updated
periodically to reflect future changes In groundwater levels. Either the Ol-
floe of the Pima County Engineer or the Office of the City Engineer should
be contacted to obtain any current updates to this map, as they become
available.
P2?
F-29
4WWOP
i?
CE
LU
V
13C
w
qr
cr
g?
7
w
Fc
ig
P
2
P
co
CD
U,
2
cc
4-0
9
92
I- cc
0 cc cr)
C?
04)
F-U. -j
Design Criteria and
-.did
F-31
res
111. Design Procedures and Criteria
Mils Chapter, provides Certain procedures, equa*M and data to be used
inthe analysis and design of downtionlreantion taclitties. The topics addi'66-
sod herein on - elm at Vdatermination of hydrologic parwneb=; 2~
of detentiordretention facilities; 3*61mentation Ingmicts; and 4) eftria, for
specific "m of detentkmirotention facilltioL The amOysis methods
F ORM'do withiritft chapterare to be applied to dels ntioniketention tacilities
which Intercept runolf from drainage won no greater than om @*wre mile.
unless speeffic authorization to the convary is granted by the apProPrOo
reviewing agency QA?., elther Pirm county or the City of Tucson).
&I Hydrology
ToWal ofthis manual provides atebuladon olone-hour precipitation
depths which we to be used in cor*xwbon with the analysis and deWp
w?p- tocilities within Pima Counry and the City of Tuc,
son. The praepitation values provided within thii; able are,to be used
with both ft Pima County and City of Isom meftft for estimating
peak tb^ as well as with the vanous analysis nwft& Presented
within this manual. it should also be noted that the procedures
pmwrmdwiftnthomamsWmsMedyapplcablec*forftwwaW-
sheds which will be controlled by detention/ retention measures that
have drainage areas which do not exceed one square mile in size.
&1.2 Peaft and Volumes
Peak-dwharge rates to be used in conjunction with the design and
analysis of detenfionlretention facilities shall be determined by use of
either the Pima County Hydrology Mat:hod or the Cltyc(Tucson Flood
Peak Estimator Procedure, whichever is applicable. The rainfall values
used wtth these procedures shall be those provided in Table &I of this
manual.
Raintall Depths of Various PAWm4WW Events
for Watershed Areas Up To One Square We
in Pima County, Arizona
PAIturn Period PAinWI Depth (kx*=)
(Y"M) I-Hour 244our S+bw
2 1.10 125 1.32
5 1.50 1.71 1AO
10 1.90 Z17 2.211
25 230 M 2.76
so Z70 WS 3.24
1W WO 3.42 3SD
TWO W
am
W"
owl
am
25
F-32
Thetoulvokmectruraff ftmat4odovwdsWlbedoWm*wdftmEqua.
Wn 3.1.
V CwPn A
112?
Equation &I
Where;
V mnoff vokam In acm 1911t;
Cw weighted mraff coefficient;
Pn n-how Precipitation depth, in h -clime; w4
A Watershed area, m acres.
NCW:Ttwff*dwftof .. M*-vfIcodp8ft8ndvokffrMP1021
within "oft section . we o* applicable when no qwftm deterMon
measuresgxIsLff upsftmde%.Ift dogeexist, than either Method
8 of Section V.3 must be used: or. cornputer, modeling of the water.
shed must be employed.
U.3 Inflow Hydwgraphs
Method A
The following method shall be used to generaft synthetic flood
hydrogmphsforthe purposeofflood routing, delention4mmin design,
and other pmoodures contained within this manual which'require,
hydrograph analysis. This method- is only applicable for watersheds
which A)are unconb6lied (iAL, no upstream slormwater detention ex-
ists); b)are hydrologically homogenous; and dyvve a dminage am of
less than one sqk a, m mks In s1zL
1 . Peak Dischwge *(Qp), Flumet Volume M. and Time of Conoen.
bvfion (1c) for the design flow(s) are to be calculated by the
methods described within Section &12 of this manual.
2. The hydrograph Rim Time (Tr) is determined in the following
manrwr
a. TorTC:S W mirtutes, read the ingvaluefor
Tr from Table U.
b. For Tc > 60 minutes, determine Tr frorn the following
equation:
26
F-33
Tr M780 Ph Tc
PC
Equation &2
Where;
Tr hydrograph rise time, in hours;
TC time of conowaration. in hours;
Pn *n-hour procipitation depth, in Inches; and,
PC "Precipitatio. depth at Tc, In inches.
un4*urf9%rstothe2-,S% &, 12-, cr24-hourpr9cipft&- Ow
tion depths, where "W' should normally be the
smallest of these values which is greater than T..
**PC is calculated by linear interpolatim between the
calculated raintall depths which brackst1c. (eg., NTC
= 2.5 hours then Pc is haffwaY between the 2-hOur
and 34wur raintall depths).
"rograph F% a a c" P q, V) are calculated from the rabos pro.
vided on Table 3.&
Where,
t time from beginning of nmoff, in minutes;
q discharge at time t, in cubic feet per second (cis);
v total runoff volume, at time (t), in acre4eet;
OP -peak discharge of hydrograph . in c1s; and,
V = total runoff volume of hydrograph , in acre4se.
4. For tow cases where the hydrograph must be f9POSSOntOd in
equal time increments (eg., for reservoir routing), such in-
crements may be obtained elther by interpolating between the
values determined from Stop #3? or by rMWing the values from
a graphical representation of the hydrograph.
WA.
M-K
27
F-34
Hydragmph RiM TMM fOr Te 99 So Mhud"
(Tc ww Tr an in mi6um)
Tc Tc
TaW &2
a
5 138 33 31a
6 142 34 323
7 lw 35 33D
8 15B 36 33A
9 lea 37 34.2
10 17.5 30 34.7
11 W 39 M2
12 IV 40 MO
13 19A 41 3666
14 19.9 42 37.2
15 20.7 43 37JB
.16 213 44 3B.4
17 21a 45 3V
Is 22.5 46 323
19 23,1 47 40D
2D 233 48 404
21 24.5 49 41.1
22 25.0 50 412
23 2V 51 42.2
24 M 52 422
25 27D 53 413
'26 27S 64 4&7
27 28.1 55 "S
28 2BB 56 45D
29 2U 57 4564
3D 292 so 4U
31 3M7 59 4V
w ws so .4a.2
F-35
P-
PAUos for Gene-stioi of Pima County
Synthetic Flood Hydrograph
tr; I qjC? viv t/Tr q/Qp vIV
0 0 0 is O.S45 owl
al Om 1.7 OA82 CL7117.
Q2 0.087 Om 1.8 M424 0.742
03 M160 OD20 is am M773
OA 0.243 0.036 2.0 am 0.789
as 0.346 0.063 2.2 CL241 OB41
0.6 41451 OM 2A 0.179 ass
CL7 OEM 0.136 2.6 0.136 caw
DA M738 0.180 2.8 0.102 0517
CIB OW 0.253 3.0 OD78 Om
ID IJOW 0.325 U 0.049 OjW
1.1 0.924 OL400 32 0.03D DAW
1.2 OB39 M464 4.2 0.02D Om
1.3 .0.756 0=1 4S MM2 MIM
IA Mm OEM 5D 0.008 020
1.5 OB" 0.627 7.1) 0 IDW
Table 33
Method 8
Forthose canwhere an Maw hydrograph mustbe determined from
a watershed which does contain upstream detention facifitiM the
following simplified method may be employed. The method is
presented in example formal, and considers only one detention basin
within the upstream waterstod. If more than one upstrearn detention
basin exisls, the same procedure should be applied in a systematic
fashion from the upstrearn-mW detentiod basm, downstream to the
point of interest. Referring to Figure V, the following procedures.shall
be employed:
I Determine the outflowhydfographl'rom the basin located at Point
B for the design storm under investigation. This information can
be obtained from the design analysis perbrmed for the basin (if
"lable), orfrom the reservoir-routing method presented within
Section 3.3 of On manual.
2. Compute the flow U I time between Pokft B and A (i.&, TEIA)
Long the Incremental tiffw-of?oncentratlon method presented
within Section 23 of this manual.
Generate a hydrogfaph (using Method A of this manual) for that
portion at the watershed upstream of Point A, but excluding that
portion of the watershed which drams into ft detention basin at
Point B (i.&, excluding sub-basin 6 of Figure V).
0?1
OW
#A*
40?
10?
29
Sample Watershed
Fbr Method 8
Figure 11
30
F-37
Hydrograph Determination
by Method 8
Figure 3.2
Legend
Outflow hydrograph #1 from detention basin at Point B
hydrograph #2 at point A, with no contribution from sub-
basin B
hydrograph at point A, considering contribution from entire
watershed (sum of hydrographs. #1 and #4).
F-38
4. The actual hydrogWh at Point A is the $urn of the hYdr0gr4Ph
generated from Stop 3 of this procedure and the outflow
hydrograph obtained during Step 1, lagged bYth9 ft"I time IhA
calculated during Stop 2. This procedure ft MINK easily 80-
compikshed graphically. as shown in Figure 3.2 of this manual.
3.2 Retention
32-1 Re"IW StOMP Volume
The volume of storage required to satisly threshold retertion aftria
shall be cala d by the *Owing method:
Vr - I jowdev - Owso PlA
12
Equation 33
Whom
Vr storage voiume required, in acre, feet
owdev weighted runoff coefficient for urban (UL. developed)
conditions;
Owex weighted runoff coefficient tor Wcisting site conditions;
P1 oWhoUr rainfall depth for the 2-year or S-year X1101 is as
determined from Table &I, in inches; and.
A drainage area. In acres.
Note: Owdev and Cwex am to be determined from the Pima County or
City of Tucson hydrology p credures. Howmr, estimates of these
runoff coefficients maybe obtained from Table U at this*manual only
fordeterminingproliminaryvakosotrequimdrotwdionstomge.Addi-
tionally, the drainage area (A)in equation 33 refers ordyto the area be-
ing developed Ct&, the on-oft area).
3.2.2 Method of Disposal
The p"rred method for disposal of retained runoff is by infiltration
intothe subsurlam Various optionstracCOmPhShing this InClUde dry
walls, engineered basin ftors and trenctw,% pe [a aNd p1pes, and kw4-
scape irrigatiom Specific design aftriaand reftrencesiorthese "es
of Iscilities are included within Section 3,5 Of this Manual.
In locations where infiltration is not a feasible method of stormwater
disposal, additional detention may be required. as described in Sec-
tion 2.2, or pump systems may be used. Such system will operate in
32 F-39
such& mwmr#Wthe retained sOrnwalOrwill be sky* F0108199dftm
the relandon bum after natural runoff has ceased. Guidelines regard-
kv rates of release of runoff we contiki is Section 22-
Runoff CoefficientS
pAhn
IfftIvol
-P,
for
SOUIZInpilmoco.
ord the City d Twom FlUnWOMIM-6 , ION) trlwbx Dogma of LW4 Use Upon
Sdi"InpimocourdyeAdtheOWOMMO
00%)
ftW (M)
SWxfton (40%) M04
Mon
I.Itw
2-year
1.1 9 C D 1
.09 .19 26 .90 0 C D
.17 26 .34 8 C D
.25 M AD B C 0
A A7 M 8 C D
AS A9 .71 8 C D
J32 M S4
5"ar 1.5 24 .37 A6 J2 31 A .51 38 AS .55 fil .59 .64 .72 .76 .78 115 W W
10,pai is :37 50 59 .94 43 .54 M AS .59 .66 .60 M .73 .77 SI .94 .88 .90 31
25-year 2.3 47 .59 M 26 .52 .63 .71 57 .66 .73 26'.73 .79 Al .84 A7 .90 21 52
50opar 2-7 SS .66 .74 .96 59 .69 .76 M .72 .78 .71 .78 .83 .84 S7 J39 .22 .93 .94
1W"ar 3D .60 .70 77 -W .64 .73 .79 M .75 B1 .74 W AS .65 AS JW T.92 JW
*P, one hour rainfall dePth, in inChm. Table &4
33 Dehfton
=1 Esdnwft Detention Storage Volurm
The 9quompresented within this section are intended to provide
esbmms of storap volume required for varmis types of detention
taclifties. The results obtained ftom app" ftee equations, are not
suitable lor design purpose& ThM modwft are only intended to be
usobrobanngpmlmmmyesomatosdmquhdgmagevokM and
br pfovkft a I*tarft point" for the reservoir-routiN tedIniquGs
preserod wMwn the fad SSCIJOn Of Oft manual. ThO sM*04'ciufns
es¬es obtained imm Equations 3,4 to 3.7 con generally be wpxAod
So yield values wittin :t2D peroft of the results obtained from detailed
roger
I*fouft. f:&this reawn, ftis 19=911TION twafaclorafl.2
be applied to the values obtained from the equabons. when 0:39903ft
preumb"Ify sft fteslift. A hkdm of i3o show be applied it Or&
cantggdkmwtk*wis m:p prim fnthebaWMHowrAKfordeswPUr-
poses, tw a=W amount of additional volume required ID account tor
F40 33
sadMmUstionshollbe Clots Milri-I , b010111611-0
tion U of this msnuaL Nota #0 sOag&qok*W estimates should be
calculated for both IM"ff OW 10"ar nwioff events sirics, in some
ingWOM the Joymstorm may require more delerilbHOomp volume
than don the IW"ff SIOM
Pam 33 ofthis. mamial provides a graphical Madonclithein-
sowAxodiowhydoographemi 'FA: were utilized In developft Equation U
to V. Forth* saM of Onplicity, wid withoutthe1oss of significard ac*
cimpy. the hydrographs toed to dove" then equation won
represented astriangieL Howem, for purposes of ressivoir all" gand
Ineldeft daWmin design, (a developed tram
#0 Methods doem It i 4 In Section &13) shall be used.
Type 1: -On4re Detention Basin Without Retention
The SIMP" type of detention basin is one which Is consmicted 41on-
NrW'(L&.h" nmpdnglwontir6flowfwmffwupsftmwaumOse4with
the Invert of Its outlet structure at the level d the-basin floor Nowever,
Los of an 't~' basin requires apprwal of the appropfift
ing agency. Equation3A Isthe mathematical relationshiptID be used lor
estimating the volume of storage required for this type of basin.
Vs - CWPt A 1-00
12 0
Equation 14
Where;
VS
CW
Pt
A
00-
Cli M
estimate of required storage volume, in acre f"t
weighted nmff coemciant of the upstream watershed for the
design sto... under investigaticin;
t4our fainfall depth 16r.the design SO under investigation,
in inches.
wauffshed area, in acres,
detention basin *utfiaw, in cis; and,
detention basin inflow, in c1s.
Type It: '80n4ine" Detention Basin With Retention
(Appbcabie wily jor watersheds of , 100 acres or less).
This is aType I detention basin, but which also serves as amantioi bc&
ty Le., retention Mmge is provided below the invert ofthe lowest outlet
structure. Equation 35 is the mathematical relationship to be used for
estimating the volume of storage required for this type of basin.
34 F-41
60fll
P-
0-
P-
0-
2
CwPt A I-Go
Ph (Owdev OweK)
12 3CwPt
L
r-Wdev w&WW mnalf coefficlent for ft proposed development. Cori-
s9da * ig urbanized conditions for Me rrYwr SMM (2 :9 n S 5);
owex wechted ninuff coefficient for ft PmPosed dmlOP=M M-
g aduli g conditions for ft n-Y8W 010111 (2 S n S 5);
Pn depth, in inchim lor #0 rrym 30 11 (2 :s n :s 5).
Symbols not otherwise noted are defined as in Equation 24.
1Vpe It 41011-?' Detention Basin
An -WRrW' basin is located now or acrpoent lo a channel (ie.. ft channel
does not ftw dhcgy inw the bagin). Typically, inflow to ft basin a accom-
plished by means. of ode weim or oftr omftw Wu=re% and bVM Only
aftr ft channel slege niaches a minkmim heigM StMd waW is raWrnsd
ID the channel by means of a small-capacky millet MZWM This " Of 1111cilitY
may only be implemented adjacent ID a pnsmbc channel which has been
sWftW b&,b hwWxtavy and vertically (ea., a =we* dWM1 With a
uapezoidal or rectangular secbcn? An off-fine Mention basin gemal-
ly has " advantage of,squh less sorage vokm for a ceflain level of peak
nidtiction, #= does an on-line Mcifity Equation 3.6 is the mathemahcal rela-
tmx ist ID be used tor estimatM the volume Of SWMP reqund for'loRW
basins, which either may or may not include "off-line"rewition.
VS = CwPt A 1 - QO 2-00
12
W9
W?
0?1
W*&
do-
equaim ab
Symbols not Otherwise noted we defined as in Equefion U.
F-42 35
Graphicaj Representation of InflowlOutflow Hydrographs
for Type 1, 11, 111 & IV Basins
Figure 3,3
?101
Time
Type 11
op
/&GO
. . . . . . . . . . .
. . . . . . . . . ......
Time
40 Type
OP."
0
Legend
Inflow Hydrograph
Outflow Hydrograph
Vd StDrage Volume Required For Detention
V r Storage Volume Required For Retention
vs Total Storage Volume'(Vd +Vd
36 F-43
Time
IWI
332 Outillow HYdWqMph IM - -- a 11101- (Reserwook ROUUM)
The ouftw hydrogr&M ftm a proposed dstigntiort basin shall be deter-
mkWuWzkVft ---txicationffwWodofiwdmu**.OdwvWY
simlim hydro6gW4&A;g.me&xxi% mch as'Inodllied PUW'1301 my
also be utilized, providied that the method is first approved by the ap-
propnete, review agency (Pima County or City of Tww?
Rglowing W a ftp4W4ftp description of Ihe procedure which should
befollOwedinpelftnil theetc 1Q,4ndC8Ii0nM0#WOf§OOdKKMV-
Eumple &I of #ft manual provides a practical eampie Of the aWiC&-
lion ofthe memod as it would be solved by handc.alculation:HoweW.
due tothe amount mid repedli we nature ofthe calculations involved, pw-
Wns; of this method are particularly sultabile for computer application-
SUwage-Indicatkm VAMwd fw DetentkwAhain Routing
1. Compute both.the '*dsdng" and "urbanized" conditions flood
peaks for the detention-basin beetiorL
2. D"lopths Wow hydrographtor urbanized conditions, usingthe
mWxxispreserited within Section &I Of this MWWW.
3. Dewlap an ffitial d@WMWANM contiguration, using the MMW
volume e0natesobtained *omthe equations provided withirt See-
tion &al of this mamaL An WW outietstructure conligWation,
should be chose,n using beg w9neenng Judgment.
4. Develop a MIMWM . hip for the IMBLIMS'd dOWNIOn-
basin configuration.
oevelop a -- relabonship lorthe assumed delentiml-
bew,joubel,structure configuration- in this regard, the FbdwW
Highway Administration (FHWA) has developed numerous
hydraulic design nornographs which nay be helpful in develop-
ing stage4scharge curves tor culvert oistlets 123 and 241. It should
be noted that the minimum HW/D ratio, used in the FHWA
nomographs; varies between the values of 03and 0.& For dater-
mining ouftm values at Weer headwater depths, it is acceptable
to interpolate between a HVWD ratio, dzefo and the minimum value
by the FHWA nomographs.
ConstruO a relationship from the stagestorage
and stage4acharge relationship(s) obtained from Steps 4 and S.
7. Seiectarootingtimeinterval(&4 PortheNtialestirnalethisvalue
should be no greater than 0.1'bmes the nee. time of the inflow
homgfaph CUL, O.q). The Mw hydrograph must be discretized
Laing this Orne increment
a. Prepare the working table and working curve. as shown in Exam-
pie al. It may be convenient to pkot the working curve on
lagenthmic graph paper due to the wide range of values VW
F-44 37
W?
so-
genordyneedfabompmwn*&Choc*towo*ir4amt0wi?-
surenOltdoesnotorren the"equaWalusellmatanypoint
onttiecurvaX kdoessiceed the '*qual4vluve'WmN ft routing
*MkWrYW(AQMIWUfgLPA&Mth*WUW4*mwtdmpag
Stop 7.The I*quaWalued" line mbralothe Ilocus of points an the
worMm curvetl0safislyVie equation SfAt +012 - 0 a 0 (see
Example 11 Sop 8?
R Prepare the roull, table and po We #w routing. The desired
outflow hydrog-MAN resulis ftm #ft step.
1CL Prepare a Waok*J repiese, tatin - of the inflow and outflow
rydi og. now for each flow analyzed (04.. 2-, 10- and IOD"w
This mMV procedure (L&. Maps 3ftough9) myneedID be pwkx,.
numerous times,,with different basin and outlet configumwns, until the
nqL*W degree of multWent, flood"& reduction iB- atlainml.
Exernple V
A neighboftod detention basin is 10 be designed In conjunction with
a354mapwwomdr#vk4xroatwtdchispropandtmbe,mea-m qvjodn
a critical basin. As a condition of drAftpment,1he f9plittory agency
requires OW peak flows mud be reduced to 95 ps on t of the giewing
2-, 10-, arid IMI-year peak valueL EOmM the maximum required (I&,
looyew)
deterition4aginvolume, F-a-nnne an OUM ConfigUrgiffion, and
perk9m the flood-muting computations for the IWIm flood event
(retention storage will be Ig. io. -foe Vft eumple).
SIMP I - COmpule the "Exioftq" and "Urbanized" Flood Peaks
By application of the PWn County Hydrology Inatl the **&Mng
hydrologic data is obtained:
From Table 11 oftIft manual, the awkwA 100jearpfecipitlition dO*
(PI) - 3W.
The Watemtied Area (A) 35 Acres.
Existing Conditions Urbanized Conditions
Impervious cover 10% impervious cover 70%
basin factor (nb) - OWS nb ODW
wWgtftd nrnoff coefficierit (Cw) OM Cw OAS
time of concentration (1c) - 12 rrdn. TC = 5 min.
peak flow (0100 M IM ds OIW = 317 cis
Peak cublow (00) from the detention basin forurbanized conditions. dur-
ing the IOD-year flood must be limited to CIO = .85 W aIlL
38 F-45
Stop 2 - Deve" the Dmign Ildlow HYdMgraPh
The tImingtmixiiarhydfogmph isobtained from the I ImMod presented
WNW Secum &1-3L
Rim Tkne (Tr) m IM rnin.
Peak Dbdwp (00 m. 317 Cie
Synthabc Inflow Hydrograph ilor Enn*M W
Trne Dwalame
Oft Tow ?DischaW
0 0 28 94
2 17 so 75
4 50 32 61
6 91 34 SD
a IQ 36 40
10 202 38 32
12 274 40 27
u 309 42 23
16 272 44 19
Is 233 46 is
20 198 48 14
22 is so 11
24 10 52 9
26 115 54
Table 3.5
Stop 3 - Estimate the ROQUhed Stonge VohrMe
Equabon SA provkles an es*nate d the requimd swage voluine for an
"On4me" dellenbon bamn wWwA fetendon storage.
VS CwPt A i -C?
12 Op
L
Thefebre,
VS a 1 (MPX35) 1-147 U acre-feet.
12
F-46 39
By applying a IRM, Of 1-t Ow PrOlk'*wy I Eli orso4alled "W
9sfimMO:, of stofage voiume becomes 1.2 x 4.0 4A acre4set.
As a Irst a basin having a suMM WU Of about It"
acres, a bottom area of about 1.5 acm, &1 side WopW and a depth
of ftee jest is dween. A p1mary Outlet VAjotum corAdeft of a two-
This pwtioujar MM MMrq wNI just oomW the required 147 cb at
a depth Of #M Ifft- AddkwnWV, the bum wle OMM about " aor'O'
*W of sormwater at a depth of ftes IssL
Stop 4 - Develop the to No ! Rokffionddp
Based on the sewnod basin WnfiWnstion, a stap4wage mWdOO*
ship is developed by cak:uIsfing atDmge volurnes, Jor various depths in
the basin. This relationship can be expressed either graphically, or in
takm do tm, as shown in WA 3.&
Smpawage Paintionship
for Example V
Table 3.6
Sage/Depth Storaw
M
0 -
0
as 0.76
ID IJS6
16 2AO
2J) 326
2.5 4.20
ao 5.16
Stop 5 - Develop the Soge4ftcharge PAMOMSW
From hydraulic design dwis prepared by the Fedetal Highway Ad-
ministlation in 24? a stag&disms-0191, rqjqfKxwW iSCkwelopediorthe
assumed ouft structure . (Le., atwo-cell, fnM4oopwidebVVww4oot-high
40 F-47
CBq.Fbrconvw*mcelnd@v*lM*V"
ship (me Stop 6), the swfw stage ftrermnts that were used in Stop
4 we und In Table W.
SMg&DbehWp Relations*
for Example 11
0 0
015 9
1.0 30
is 55
2D as
2.5 115
3D ISD
Table V
Stop 6 - Develop the Stmge-Dhwhaw Rehdk=W _
By combining Tabies 3B and V. a storage-discharge relationship is
obtained as shown in Table 3AL
Storage-Discharge Relationship
for Example V
Stage/Depth Storage
(aQ
0 0 0
as 0.76 9
ID 156 30
is 2AD S5
2.0 32B as
2-S 42D 115
3.0 516. ISO
.W
OW;
Table 3B
AW
Stop 7 - Select the Routing Thm 1nhwval (W)
W:g al Tr Awl
01 Tr a 41 x 1W a 136 ffM.
M m m as W a 136.min AW his.
41
F-48
Plepai Ow Walkh Table
A working table fOr the muting *W kOrV&l (W) iB POSPEW 8S
dernwatl d inbble 39.
vVcrMV T" for ExarnPle &I
(&t w OBW hm)
StagelDepth (2)
Outflow (D) (3)
012 (4)
SWW(S)
Sf&t
Oft) (7)
SIM + 012
ON
00 (ds) WS) af (Ck4wSr
0 0 09) ODD 0 0
05 9 45 WS 9.2 4DS
IM 410
ID
3D
ISO iss in Ow Be
is 55 27S 2AO 21LO 1281
2.0 85 425 UB 31U 1751 1793
2.6 is us 420 SM 2242 2WO
3D IM 750 Vs 62A 28M
Table 3.9
W = 12.10 CWM
(2): tom Table V
(3) = (2)12
(4r from Table 35
(5) w (4) x ILIO
(6) w (5yAt (At in hoUn1)
(7)- (6)+ (3)
Soup a (coft) - Corwrtrwt the Woking curve
Th9wodft"isagraW"represer-tatin ofthereWfionShiPbe-
upew (SfAt + 012) and 0 (from the working tabb? Generally. it is - -xx
corwenient ID plot the wo*ing am on Wga*Wk graph paper The
line of **W vWuee' should aft be plOtted. If IM WWWg curve GX-
opg& #" k* at wW bco§M a arnallervidue of Wshould be selected,
and Sope 7 thmugh 9 repeated. The woricing cum for Vft axwnple
is provided on Figure U.
Sup 9 Ppepare the Routing T" and Pedwm the Routing
The muting table and the muting prwedure for dft mew q3fe is Blus-
trated in Table &IQ The resubB of the muting procedure indcWe #0
the jwjwr peak outflow ftrn the asawned clatention would be 113
cls, at a amp volume of 4.14 acnknL Sinoe the recOrervient is to
42 F-49
1000,
50D -
100-
so-
5
'
0
(CIS) ??-i -
id?AALH4.?-
100
SILt + M
(ds)
4W
w-
-7
t i, '.7-9-70
.
nm
-i
ODD
m
,
T
TZ1 N j_ 7:
d I I
O
Of E q LW
I I f
Workin g
ILL
t #2
L
-4- F-i I
IL
q :Hj :H1,
t r I. H!?
3; Ut!
ji, !-I Mt!
TOJ
f
"-4
t
-j iLa
4-jj I
Soo 1?00 5M
Working Curve
Figure 3.4
43
F-50
Movicle a maxft= IODIM OUMM Of 147 ds- #* Oasin cwd'guw
thn is mnswhst ow4moo& -RMM 3 ftwighl MY be MPOINd-
In wN a urd an cpftm dedgn Is
wo,nwdftd ba*Vo"
achWis&
sw ic Poopm -a GwaphkW
As the *ad smq% agmphkW oftobdiawwwoudlow
hy???WvvoN as the I*ddft wnMWW'N*DVqft S140M
be pnopared as WWI W. On POM 34
Rou" Table for EMMAO W
m IAI fm
. t-9)
Thm Slap - - tw-I
TMve V-1 -
InOw
IB) - ---I
SI&t +012
'(Cft)
Out0ow.
(da)
SOMP
SMP
(ft)
(hm) (n0n) (C
0 0 0 0 0 0 O.W 00
I Claw IA a 4 0* 0.01 01)+
2 oam 2B 22 D+ 0.04 00+
3 on= 4.1 51 61 1 0.11 W
4 oam 54 ?77 123 3 023 0.2
5 M1133 214 5 0.40, 03
6 CAM .&2 337 7 0.62 05
-7 0.1507 25 .194 493 13 0.01 M7
8 MIS13 109 235 See 22 127 -0.9
9 .02040 122 202 925 34 1.70. 12
10 02M 126. 317 1190 49 2.18 is
11. 02493 Iw 202 1"s 64 2.65 1A
12 02M iM 205 77 3.04 2.0
13 02W 17.7 239 Be 3.36 2.1
14 03M IRD L"4 1975 - 96 3.61 22
Is. 03400. .2DA Im 2081 102 3.80 2.3
.16 -21A 172 2161 107 3.95 2A
17 a 2&1 IM 2216 110 4.05 2A
Is OAOW 24JS 134 2249 112? 4.11 2.5
19 0.43CIT 2U "7 .2263 1'13* 4.13 2.5
2D OL4533 27.2 102 2259 113 4.13 2.5
21 OAM 2U as 2242 112 4.10 2A
22 0.4997 2GL9 765 2213 110 4.04 2A.
23 OSM3 313 es 2174 108 3.97 2.3
24 OAAQ 32.6 56 2127 105 2.3
osm 34JD so 2D76 102 3.79 2.3
26 WM 35.4 43 2020 9B 3.69 2.2
27 as= W 37 1962 95 3.59 2.1
28 OBW W 32 1901 91 3.48 2.1
Table 110
F-51
- Po"m Wuumw
MWI
I-
P. ure Wed to Develop T" M0.
1. Columns (2) and (3) we obtained from the syntIWW Inflow
hydrograph (bble 35).
2. Column (4) is calculated as **mm
(4) - previous (4) - previous (5) + 1previous (3) + (3)112.
For exwnple, a time step #5: 490 = 298 - 10 + 2OZ
I Column M oLdw is c h toi a from the working curve Figure U)
,for the cc reepa hg wake of (SMt + 0/2).
4. Column (a) is obtained by Interpoletion between values an the
WWI relationship (Wft 3B) for the corresponding
of basin outflow In column (5).
&3.3 Principal Outlet StrucUUM
W,
F-1
"I
Multi-FmWMW OutIeW AW
Due IND pwisions within both the Pffna County and City of Tucson
Floodplain Management'Ordinances which.require attenuation d the
2-,106? and 1W"ar peak flows. multWrequency outlet structures may am
be necessary in the design of many stormwater dion facilities.
Them are no standardlized prooodures ibr the design of an'tomum"
mWbftquenr,y outlet structure. The poWtial combinetions d suitable
outlets for any particular basin we numerous, and limited only by the
creativity and eqxwience of the engineer Rgure 3S provides three ex-
arnples of typical multi-frequency outlet structures, consisung of com-
binstions of orifices, weim stanopm culverts. and spillways. The
minimurn allowable pipe size for outlet Muctures is 12 inches in
dametet Howsw orifice pisses-with smaller openings may be attached
to further reduce the low capacity of a pipL An afternative to this type AM
of'lconWund" outlet structure is the proportional weir The proportional
weir has to unique characteristic of a linear stage-discharge'relation-
ship. Properly desgned, this allows for an outlet sVucWm thatzerves
tD attenuate the entire range of peak discharges between the design
frequencies. In other words, with the pfqxxWnal weir, not only can the
2-, 106i and 100jear -peak flows be attenuated tD pre-development
values; but so can the entire range of flows between the 2- to 100-year
lood frequencies (ea., Mlear. Woyear, etc-). Specific design criteria
ior the proportional weir can be bund in Sandvik 125) and French 122].
In all ca when multi-frequency flood detention is required, reservoir
fouting "I be perlormed Jorthe 2-, 10-, and IMyear frequencyloods,
at a minimum. The reservoir routing shall demonstrele VW post-
, . I I ent SoW peaks tor these three flow events are no greater Von
pre4ralopment flood peaks, as required by the applicable Floodplatn
Management Ordinance of either Pima County or the City of Tucson.
AddMonally. graphiml repesenWhons of the mflow and outflow
, ragaphs for the 2-, 10-? and IDDlear flows "I be provided within
the hydrologieft"raulic report
45
F-52
A;,.
twoO W?
Inflowfoutflow Hydrogmph
tDr 01W
Figure 35
ETI I
9
R
S 8 9 0
co CY
F-53
Typical Multi-frequency Outlet Structures
Figure 3.6
ground -,4
100-Year W.S.
10-Year WS.
2-Year W.S.. V
weir pipe/culvert
L17??ir-j -
orifice 100-Yerar C apacity
mmmmmmm?
Orifice - Weir - Pipe/Culvert Configuration
ground?-.
100-Year WS. Sz
10-Year W.S. 17 top of Spillway
ty =L
all
11
2-Year W.S. V
weir
orifice pipe/culvert
10-Year Capacity
Orifice - Weir - Pipe/Culvert - Spillway Configuration
op::; 2, .1.11
!:4 ?-7M*
Proportional Weir
47
F-54
1rash mcks shall be provided lor all pipe and orifloe outlets; which are
24 inches or ises in dianwW wid for all graled outlet structunm TMsh
racks shall be designed to be mnw4abie, and?have a surlece was, of
at West ton squai @ feet. Ops*V In the trash rack should not em PP l 1
one4isff the area of the outlet pipe for mesh savens, or or*400 the
diarnew of the outlet for bar screens. The mirdamm opening should
be no leasthan arm Inch. Design otthe trash rackahould cc wMarthe
MWhood #W unclogging mVVb**racsssWY When the basin is filled
withwalstAdditimuftaconcratepedis ago, m -andsilevoundthapor6
ton of to outlet structure, to be located within the basin In onW to
twukwe maintervinos of the Vash vacL
EnWon Contol Downsumn at Ouftft
Adequate erasion-contrOl measures shall be prowded d=nWOWn of
outlets Jor --- - Ostention basins. Such manures should kww-
porale the wileft provided willin"Drainage and Channel Design Stan-
dwds; for Local Dralnsge:- upepared by#* PimaCounty DWWMwt
of i wW Flood Control District
Local scow at culvort outift, as won as long-term channel degrads-
tion downstream at the basin, must be considivred as an iniagral pan
at the design of any UUMnlionfistai tionUdIty. In thecase
of on-line detention I, a in , downstream channel espo n P shall be
aradynd assuming no Sediment is being -supplied ftm upstrearn
maches. In many inOMMOS, this will mot In the need to ~ from
gradocontrol anwww at t9quent Wftfv@k or 10 ownpM* bra dWj_
nels vrM normwaftle material downsboam of detention bollifies. Pw
leclionaglainstICK *80=81WIN 11:0114MISMOU116113"bedenig -all
In accordance vft the IN pwided ImmWience VM for aw at
GuIvWt =dkft U118 Includes Such measures as aaaff wsIK
fock WW ?:w*rlin9d Jn vassi. of . flow &I
oudft imeralpf veloofts, an energy
disslpaW shall be provididio"allow ftm ID m", d0l g '' ndl.
sons, to W grow. vft wasirt s -=sift prior to sOng onlo the
32A El
shouW be =WjucW with this Storage volume localsid onfirely-WON
the naUxal. ground.surboa adjawnt tp the bagin.."oWeve; In soma In-
-sn" .,.meybe
in oraw to pmvide the mquired storage volume. Since the. we of wn-
banwnents may create I a po ? No'downammm flood hazard due Ito
failure ot the embankment, the following design Must
be addressed in conjunction with their use:
46 F-55
PAP'/
1;111
800 Dam SOKY FW qui N big
M*Pjkmr&DapwonMoIVMKPAW=W(AMMDMsionafSOW
dDxM.has"WkAKktbn overall dam (110-111dOWN, a whichax-
"m 0 Fin Coke*' heigit andstorage limNLA"Juriedictionel dBM:'as do-
Med by ADWR. is 41 .. SOW25fog or am in height ore PC am more
#MWIC 0 it is 111111111.1111111n.six fast in twigN j e gm cis an of worage
ordonfiotstore-more#= i5amWestregardlessof hei^
It is to in AffilideCOM!' The ADM should be oxMuftd mgwdmg
Xieclk darma*y m**emwo In cor*xxtion wkh.the design of any
ibanionentwhid migM come under their Jurisdiction.
As the ria" impl" emergency MOM-ays am provided for the safe
&.vrftwandf1*r1h?pun ofincoming1loodWESSMOMMAUStiOnfiltriSO
#0 wwo not Ukan Inlo account by normal damp assurqXions. Such
situations may Include to of the priniary oudet struckx*s?
or the occurrgince d a sionn event larger #= #0 fw which ft basiri
was Flonig
Ermrgewy?spfllway sectione shell be incorporvited kft #w design of
MW W! , I W, I whict employ 0 . I Winents as a
machshism for vioring floodwaters. The function of the emergency
splMWshdb&IDWWJFO#WNRP 1 011 1Whid ffdgftCdWfWiDDOOf-
lop the embardwrift will ai* the detentim basin end flow downstream
in On serrie'manner and directim as would have occurred under prw
develcpm conditiorm
W
awl
The deWgn of emergency MDkvays shall i - P, R F c aft i adequab 01 osiol OP
=*W and energy dissipating measures to one= the stability of the
ernbarikment. The minimum design standard forwriergencyspillways
shaH be the unatlenuated 100im ON* dischargO, 1113 dOU=*W by
the Pon County or City of Tucson Flood Peak Procedurfis. for any ern-
bw*meffl which does not tell within the jurmiction ot the AMVR. Em-
bankmwits which do fall within the jurisdictim of the ADWR shall corn-
ply with the applicable ADWR deep requirernentL
Seepage, Through dMilentl;
The ftW of Water through -a pervious fouriftlion proftm seepage
to c a's as a result of the ftiction between the pwcolating water and the
800 Medium. M the waler peroolates upward at the ioe of the wftnk-
mem the seepage bmes Oft the soll by reducing its effmAive weight. In
certain cases, this "pipirWd the twriciation soll con rasutt in the faure
of the embanlawc Shoe Oft process occurs over an aftrided period
d*mitwibgwwmlynotboapmblomvAthriam Mig. basinstheldrain
within a few hourL, Howeve; d@W facilities that are de-
awledlorr . *creation andforwaterm-usepurposes. widtheiefoi store
water behind an embankment for an 4xierided tirm. shall -be analyzed
jar , aaapagePMbWM1! I hean*Yft*Mft*jdaLan1WF MP
analyift techniquet If the analysis inckofts that potentially tiarmful
F-56 49
seepage ftwough or underroath an sntwdmwm Is poulft #wn OP-
Pkawernsawdsotseepage-mi tin sWbeincorporawdinOwdesigrL
Ailetliodswhich haw been successWundloreduDesupp include
am trenchm sheeWing, and concrew cuWff vmft
An additional consideration b the wepage of ratelOwd nwooff kft soils
having shrinkWooll - , I ristics. mWeespage Inlo Collapsible SWNL
ff struchnei; an flo be locsW adjacent to Me itic ?- ba@M@,,#wn W
geoftelw" lmos*dgetiors shouldbe undeftkenwhich ad.
WS
Low4kwchannels and MWed basinilcorsetmuld beincorporsad in the
deep of all 'W' detention buft In orderID. pwmt any ponding of
nLisw=vAOLLow4lowehanrmftshoMbodasWWvftan**mn
longiWinal siw of OB05 betlloot, and stwuld be designed with a
capacityloconveythepre4e Ic)p -ent2jwIlloodpeaKUpractical.
COnwGw4M0dIow4kPw;=mayb9dn 19 njwkhamkmnm
lonpWinal 8110PO Of UM %@Uhxt The basin ftw OW be graded ID
drain eldw.wward the kwAjow Channel or #w out*t:SVUMM The
minimum ftor slope she be Om bOVIOM.
U Sedimentation lmpwM
U.1 Eirtimating Sedimerd Delivery
Deposition.of sediment is an urdr4oiclablet i" A n a qii p i m, i associated with
the cortstruction of detention bssft an naUW wakercourew wift i Pima
County and, to a somiewhat imam . delpm the City of Tucson. In order
tID mitigate the effects of sedimentation, defention 19 a" c must be do-
sigrod in a mannerthat incomoraw additional storage volume which
viviaiiawforacertainamountotsedino bubdupAdditionally.anin-
spection and maintenance sea , ule shoult! be Implemented to
p w 1 o dic a 1: y m owdAINI wowr within th6dele dow basin, and to
remove beess; ndWdft as
The additiOnSfatorapvolurnewhiCh islo be.. tnftdeWp
of "*~'deftntion ftellitim (no delinitim of "or~* deftboi in
Section 5?-ChapW U s?hwal tbas ftmEquolonUThisvolurne
is p a rignistely equal to Ion thIMIS tile sediment yield
wbmPkmCountywidth*CltyoflbcsmandmugW
flow event.
so F-57
W?
WP
VaD = SOO A CP Equation 38
Whom;
VSD w addItional datention/mention-basin volume required for
sedime. deft within an "orAkW' facility, in cubic bet
A drainageareaCorObAingtadWArdbA91019b bUKinSOM
and;
Cp = tractional portim of the drainage area wl id wM be conkibuting
9".. Ano which wM not contribute sediment Include all im-
Perviousaress? areas, and otherarenowhich have awface
tim sm - ens that prevent soll loss.
The additional Worage volume which is to be incorporited In to design
of GVI?W ' detention is- m, Ml 1 11 (AgeK me definition; in Section 4 Chapter
1)shallbe75perce. of VSD. asdatermined from EquWon3AL
jo?
3A.2 Methoft for Oornrol of Sedimentation
sedirngwmmonirnpactsupon --I- --tionimmentionteeftessfid be can-
voW trough a periode Inspection and maintenance schedule. In order
to lacilitate future maintenance. permanent concrete markers shiall be
bmWisdattheW*otftbamftwinorderiodeth thelimitsforsedi-
merit removal. Addlljoraft, graduated posts shall be Installed at each AW
coxg madwtD a heW necessary for adequate defineation of the
upper level of sedrneM bukk*? which corresponds to the &ddhmnal
volume (L&, VSD) provided by Equation 31L At a minimum. sedirmat
bukkip sWI-be inspected on an annual basis, and shall also be in- *ON
after any woor inflow ID the basin. E aWiment shall be
renvied *om the basin at mich a time #0 one-half of VSD has ac-
cumulated. This level of sediment bukkop shall be clearly marW an
graduated posts installedwilhinthebasin, All SKWVWMmmowd ftorn
#0 Ml -anhow 19 ul , shall be ofeltheratanauthorized
swdWY6--d oral anyothersultable locationapprovedbyPime County
or the City of TLc=L owl
Sedimarit removal within a detention basin may be twilitated bythe use
of a "sedment trap" at the basin Inlet, which will concentrate the Ma-
jority of hooming bed bad within asmall portion of the facility. Sediment
traps should be provided in ow#Nction with all detentim basins which
we WWWed as muttiouse facilities. A conceptual -late," of a typical
--nbon4mksin sediment trap isprovided an Fqurs &7 Following is a
Wof guidelines for the design of efficient sediment traps.
1. The additional sedimentation volume VSD, as determined from
Equation 3A should be provkled within the sK%nent MW at an
elevation below the invert of the inflow channel.
51
F-58
?j
a"
L?a
Maw A
Plan
Section
Inlet Channel
a - 2 -- --I
I WWI 1. wais
Sediment*
Build-Up
Sediment Trap Concept
Figure V
52
do
a - Ana 00?
For Drainage of Sediment Trap
F-59
-Z ThgWVWwiftraoofthgsgdimwttrapshouMbeamirdmum
of 2:1, wilh #a kwgm measured Wong a Nm betwea the Inlet and
a The basin gum should be wedge-M...W. with twrarow wW
boated at the Inlet to the basin (sm Pqtn 17).
4. Pamiam brictal ftinage ofthe sedimerittrap must be provided.
3.5 Cftda tor SMcW DownumMeumdon memods
LLI Surk" stomp
Surface,stm age mbmtoanyWOmwiatersbmgetwgltYwtdchdobdm
orretainsrunoff stground level. Exceptin cortaincissM when hind-M
mobs' a may dictate the use of underground sloragei sUirmwalev
storage Mollities within Pima Countyandkirthe City oflibcson will rely
Wift heavily upon surface, storage as a means for sadsfyft down-
tb%h rewhements.
%tnm"nofdftnWr*MrdmtcFdmwhchutirmesurkwsMW
Include:
Open Spwe and Common Areas.
aress: and common areas, which we typically provided in
coqunction with tomr-densky residential development, afloi r' an cc-
calm Opportunity for O"M efention. Positive drainap
twiard ft outlet structure(s) is especially h, ipo, tw i within this type of
facifty in order to prevent the accumulation of standing waW and
therefoi preserve the aestheft appeal of such a facility.
Pedwhion Ow Courtyards.
Similar to ft common areas of residential development PKIestrian
plazu and courtyards can be used for stormwater storage within com-
nwrcWdWUMW arem Such facilkies,sticuld be desOgned to avoW
*Vmft
Roadwxy Ember4mient Storage.
a-
When ftasible, use of roadwaylill slopes as an embarkment for a desen.
tion basin providesan sex -m Of, means ofstormweter storage, Specie,
P M - * -A I P must be given both to the stability of the embankment
wW to the PiOledion ot theembariltment from mosioi AdditionallyState,
of Anzons dam-safety requiremerits may need to be addressed If the an-
bankment height ardW On potential storage volurne, sionds mrSam
limits (on Section: U4
PAVkmal Deftntlim Basins.
ftrthe Purposes of Oft manual, regional detention' refortostomi-
walersUngle kcilitinwhich inleamp the flowtrorn an upstrearnwatv
OW #0 has a drains"LLarea greater than one S*U"L mile. DOSW Of
such balities within ftna County andkirthe City of Tuoson is intended
53
F-60
iD be in cw*xcdm with the of.basinmanegementpWins
prepared by, or unclet the direction of, the Pima County Rood Coftol
DistrictortheCitycifIbcsonEngineering Divisiom Ingenval, the r No 'a
andmethoapappm within-thismanualmenot fo the
anal"ft mid design of rookmalAlAsiffic besini
ListedbelowarecertO criteriawhid willapplylotheriamig ofaurface
stonigedelo fia Aam bicilitinthetareplo
eltherthe City of Tucson or Pirna County-
1. GMding of any surface storage lacill ty shall comply with the w
quimuenis specNied within ChaptM I and 4 of this manual.
2. Sedi wthin --'- shorkhoWntion' sW be
ancl controllecl, as speclfiW within Section 3A of Wo manual.
I Mwdmurn disoose times of row0fordmin dionhahm.
tion basins shall be as killows:
a. 12 hours for doWntionketention facilities whid I terrop
runoff frorn an UPWOM wSOMW am which is up ID an
in sWL
b. 24 houm W dain -horkhawft Iscilities which ii to cop
funoff Immanupstrearnw0wWWareathatispeaterv=
an awn in size.
4. Detention basft which do not a olm siornwrow retention
must Pfavift positwe dmnage ftm all poinis wftft the basen to
the outlet wucwm ff won Of swidev WNW ftvww owtime,
vegnidingotthebasinwillberequirWjohmn dminage.
& A solls report shall be pecluired in =*WWOM with the design 01
each surfam Stonve facility which uliftse inIftation as a nwmW
Of basin &aftg9. The report shall, as a mkiimm, address voil
lerod6ftsollpermeablilly.slopesUblity, and
groundwwater elevations. -
ra. Outlet MuCtUnIS for 'lots -00 facilities shall be oonstructed.
wimmurvw posa-b-s. such that they are physically opposite inlet
7 NO'W~detention ftdWes shall be permitted 0 any poyfic
of the wash is in a natural stele upsmwn of the basin,
orif the upstrearn watereW isgreaterttm 100acnis. unlevew
Proval is first: granted by Pima County or the City of Tucom
Grated outlet stnxtures shall M be 00MMSOW to account for
debrisblockageandr.1mggiig Fka0madelh screen orgash mck
sWlbed"gnodlDpvmtbbdopotwWwWoucueWhch
=1 porates grates.
54 F-61
W-?
R The pungCountyarCayofTucson Paft andP.Acreation Deparl-
tenfiWor MIOMMW Of
nxwff wNdn any WOM low
IQ FedOod4wroWvadm?ofsmjdu=*Wbeamk*mnoforw
W above the loolm wow4urface elwation of any a0went AW
Ition b.m@kL
3.L2 Pokk Lot Stomp
A special cue of surface storage is the use of parl&V Ift for deten
I I
tionheogion-TheusedpoW. formeeft
d a- "' NIP- requirements in hqh4ensky commercial and in-
duWWOWObWmftPmmingdarsawMhapwkingktwhichwRI
pm cligshoLidbesuchOopedoebUmanhomPA.iamWas
Oftas possible Deeper areas should be CoMned to too wend
poicingla,wherwverpossUM The maximum dePthdPonded water
wWm @nypa*1M lot location shall be cro M foot. Drainage of parift
kAs=nbea=no"dbyffmmddrywob(ttpwmft4,cLxbopwl--
kV., waiM stoin drairm orifices in walK gated ouft% W.
The minimum bnghKWW slope permitted within parkire-lot storage
faciftes is OW& unless concrete vallsygutlers we provided. With con-
crew valley guttem a minimum longitudinal slope of OOM may be
permitted.
.353 Rooftop Stomp
The use of rooftops.;; storage areas for runoff is not an. acceptaMe
mellmd ot meeft the onhetentionerdenadeMwPOWCounty
or the City of Tucson.
3" UndergroundStorege
ift type ot storap mvohw Vw construction of. underground WnW
ppM or mft Much acceptstonm%ister rum.0 W MOsM Of 810m)-dMin
pipes and catch basins Due to #* high cost of of this Mm of installa-
tion.1tisgenerdyfirrifted to high-derwitydevelopments, where surface
storage is not WOW due to elther the scarcity or high cost of land, or
both.
Underground storap facilities must be provided with some method of
drainage (".. Wavily draiM pum;M or Wftatbn). In all cases man
how (or some other means of access to the underground storage
facilities) must be provided br? maintenance UrPOWL
am Sub" Is pm Disposal
Nk&4ft for underground dsposs of slormoMer rundl which twife been
used ftmqhcxAthe country include sloW drains, kAtm-
ton benches, and engineered basin flows. The analysis and design of
thesemethodsisweldocurro WwM*iaF9dendHVMMYAdn**tr&-
bon publication onftd UndeMmund Disposal ofSkwffwmW Runoff
55
F-62
P7? This PUNICOM Is avaM* ftm the dran of both the City and
CmityEnpwandfmnthoUniw"ofAft=MNWTheonVw
engaged in the design 01such.facilities is.91mi. lothispublice*milcor
specift design cftd&, A moceptuld sketch of a Vocal engheared-
basWrIWr kwWOM is provided an Figure SB
Due 10 to generally deep gmundwaw Imb and pommability of sub-
surface sbae, withm the swnAWd souMwes4 the nwN conwnm ffWthOd
ofau"urfacedismse otowmw&W histmicaft. has been bythe use
of cWy wqNL Figure 19 prmwdss an mintple of a Vocal &ymWI
hotallation..
BottDrn of Retention Bmin-,, Fiber Fabric
RocklCoarii Gravel
Conceptual Cross Section Mm6e
Engineered Basin Floor
Figure 321
The folkoWmg IM of requimnents and altv shall be utilized in ft
design and construcbm of dry web (or other methods of subsurface
disposal-Of mmwmf). The reader is also raft., to ament drymm
policies adopled by both Pima Cwnty and the City of Tumn.
1. The iriftation surface ofthe subsurface, dispose beft must be
aspecilied minimum cli'm we ftmthb sUft gmundmater
U&^ both tonwritally and vertically, dependM an the " of
do proposed. The Pima county Pmd control DoW
or the City of Tumn Engineering Division Should be Contacted
for specific criteria regarding this Item
2. The design of -dry web Must W*de PIWASiM IOrtmPPiI9SS&
mom withiri a settling clamber. This inessure, will signifficafffly in-
crease both the efficiency and useful Ide of the vvell. Once a yew.
at a n**nLffn, the settling chimter shall be I e; and it 9W
alm be Inspected afar a" mvW inflow to the dry well. Sediment
shall be mroved from the charnber at such a fte that
krm*cro4WafbcapadtyisUW.ThIB*Mofsnria -a tbuikl-
up shall be clearly marked on the inside, of the settling charnber
Ali sedirnent rernoved from a seftV chernber *0
of either at an auftrized nnitn WOMI Or at.any Other SUM*
kxmtion appi by Piift County or to -city of T=M.
.36 A test well shall be Installed for any retention befty udRzhV dry
weft for sbmwaor dispose. This test well rmy than be utilized
as one of the functioning dry web Wfillin the rMift UCW.For
F-63
0
40.00",
CaM Iron Ring and Grate
Debris Screen
Settling Chamber
Asbestos Conc. Overflow Pipe
Precast Conc. Uner
Fiber Membrane
PVC Pipe
Gravel Drainfill
Injection Screen
Typical Dry Well Installation ow
Figure 3.9
Courtesy of McGuckin Drilling, Inc.
won Phoenix and Tucson, Arizona
67
F-64
purposes of design, the "WW" w9WrO*cdcn rates (determined
from the test w9IQ shall be multolied by the ham 05 in -orderto
estatillsh '"W" wW4*cdon rates to be used for purpose 8 of
determining the required number of dry web ultimately needed:
within the facility.
4. krififtration rates of dry wells, kdftatkx venches. or I Wood
basin floors shaill not be used as outflow rates in loodrouting po-
Cedures. Any basin which mon solely upon
infiftriitiori as ft mallwd of drainage shell be sized to - - tal #0
maximum sump volume #0 would be required wOW con-
siderft an outflow raft.
& Disposal methods which utilize lfimtl shall not be permitted
lor storffmater ruriolf which carries signilicarit WOOOMMENIM I d
sedimeriLThisinckidesstoriviwaterrunuff g#woughswW-
bed channe.K as well as stommater runoff emanating from a
predominantly natural watershed.
& During sft development, all dry web shall be securely covered
with fiber cloth or other fraftfials 10 prevent the iritroduction of ex-
cessive sediment into the wMg charnbet
7 ReWdion of runoff emanating from industrial developmeritS and
infiltration of runuff to the sub-surface will be handled on a case-
by-case basis by Ve appropfiste nwWwing agency.
3.6 Basin Design Requifements
Floquirements fegmdb ig basin side sicipes, depths, samirity barriers, arid use
of multiple basins we providied bekw These requiremerds are reft sde A ard
a, cp st A 0 r' upon in Cl akpO 4. Section 4M, where they am given in cw*xc-
tion with guidelines for plarwWw basin shapes, design of multiple bans bum
screening, and design of WAK arid OUtlOt SMCKIML ROW 10 Section 4ZI for
illustrations exemploft these requirements.
3.6.1 Basin 816940opes and Depth$
Varying side-slope gmdom shall be provided for basft one acre and
larger. Snux)th transitions must be provided betwee grades, and the
iew ... mended hoftmW disurm for each slope gradient should vary
by at least tm feet (wample: 31, 51,1M. ). Continuous uniform SIMM
shall not exceed 2D% of the bum penmetet
In basins containing human-activItY zones. access of 181 or flat-
ter must be coordinated with these zories. There WWI be a, -
of 1W feet efther to the base of an eceetss slope or W a 4--1 basin
skle-sloPe.
11tansitim from slopes to level gr ound at the top and bottom of basins
shall be smooth curves.
58 F-65
pm, I ..
a-
The following slopwklepth ratics are required for mufti-m basm:
1) A mamimon of 2.1. for promoted sidemelopes and. 3:1 for un-
protecMd where depths are less than three Ibet
A maidmurn d4,1. whom depths are equal to or Weft, ON
feaL
A benched configuration is reqtdred for' in micess of six IM deqp.
Benches within basins shall be proporborwd so On berich width is at
WW three times the height of the slope above it, mieasured frorn the
lowest point an the top of the slope above the bench. The minimum
width of a bench shall be six f9eL
The mwdmum depth to *9 bench, or basin floo; shall conform to the
previous slope depth mtios
All detention basin floors must be graded to drain.
3A2 Security Barriers
Basins desgried in accordance with the reqWrernerits contained in this
mwwW should preliide the need for lei ich such as clan-link. Howevet,
In the idlowliV instances sectrity barriers are roqL*W. Ttww barriers
may consist of vegetation, masonry, wood, or chah4nk. VageNion, or
a combination of vegetation and structural materials, is preferred.
Sewty barriers must be provided at the top of all basin dopes deeper
than 41. where water depft eceed two 1991.
Vegetative barriers must be of a width equal to or greater than overall
heigM with density sufficient ID restrict access. If vegetative screerwQ
IS to be used, plant materials nxist be in phm and esta at the
time the occupancy permit is requested.
A mirftum 42-inch barrier height is reqWred for all basins.
Detail sections of proposed lences, If reqwred, are to be shown on pav-
ing and gradaV plans or de"loprnoent plans, as appropriam
Local, priva*basin fences must be 42 inct=, or higher, an any side d
basin where bwkkngs or other restriche structures are within five feet
of the basin, and have no points of exit or entry into the he area.
FenckV, 0 required, shall not restrict the hydraulic capacity of Mu=nm
Railings must be provided, as reqWred by the Uniform BiAding Code,
for retaining walls on any inlet and outlet svucwm headwaks and
wingwafts.
Signs must be PWvId9dI0 infolso ftpubfiCof the basin purpcsp, and
the potential safety hazard from stmiwMer deteritionikeention.
F-66 59
W&
3A3 MUIU* 98*0
Whwe the swowbasin depth required mesads fan 18614 or whwe the
basin VCWW SMOMOCIS 50 acm4M, multiple Igaii n i sW -be used or
quideiinestom the manual andtled "Guidelines forthe DOWWpmwtd
Fk*onal MLdfiPM4JSO NOURFMOlifti Be** in Pima-County.
ArftrW' shall be employed.
60 F-67
.Multiple Use Concepts and
Aesthetic Design Guidelines
IV. Multiple-Use Oonoe;ft and Aesthetic
Design Guiddlines
sof elenfti basin
design pfta*wlh regard bmulWO-tise conce^ Wading. andlandscep-
ing. The Mal of &.11 deientionhwiention beaks Is to be muffl-use. regardless
ctsiza.Muftiple-useafternstivesarep new i 4, as well w gLddefines; for basin
s&V and urface trestmentL Requirements Wevicusly listed In SW= SS
besin Wading, use of nuiltiple basim and secimly beffors are also
tqm and MuMated in Oft &aplet
4.1 Basin Siting
ceallonctraentiaddelst basins can kdkwm efbcdvwww In convalling
xwmwaw poteritial lor use bysuncundft fesklerft wO pmeptic icftw
sft as.an wrarft.
Guidelinestorsiftare presenled heretrtw most commonlyabserved and
basin bcatiom These kwktft but are not limited to:
P, scale Shes
Indiv ual parceft (commercial and industrial shes of*h
lFicadside locatians
4.1.1. ftcfect Scale Silas
Mere indvWual lot reWdion is notbasible ardeswed, a common tacility
may be provided to detain or retain njwff fwm the pwject. This scale
of basin may be emooyed at kxkWW or office paft muft;4my* hous-
inj complexe% or wWm single family neigtibortooft
In a residential selting, a proo0acale basin pwides more Vwan a vWW
amenity. A cenValmed location may encourage active use of the bum
area for recreation or rabLvdion.
GuldeNnes: Basin Siting in PAsidential
basin in a centrabed am for easy access and visibility.
F-69
61
Providis open Wa Wft ftm basin 11D any exwMV or planned
Open syMm. Then can be pedestrian orbile paths, arbuf-
for areas between dIfferent land uses.
Coordinate basin site with other wrsft recreation hiclifties.
Coordinate basin site with community open space and nxnation
facilities (schools, churches, or paft).
4.1.2. Indivitiual Parcels
Retention ofstorrrmater runoff an individuallots mayoccuran irckmarial
orcommercial sdes. This manual does notapplylIDSIVIOP-MMIly MSdWl-
tial lots. UUMscale sites havetheoption of wmbirftbapirswithpark.
ingwomper4ftralWxW=pedanws,WftrWips. I alhoi or
with open spa between and around buildings. On smaWr Dwcels
basins aWmore H" to be integrated with landscaped areas ordy. Lot
shape and size, land use, and required stanwater volumes Ilor Men-
tionkletention purposes all play importwt roles in sftV basins and.in
thw sme, Comply with all applicable ordffwKwh regulatioris and desgn
policies when -siting basins.
62 F-70
QukWbw: BuM SM9 an kxivkW Parcels
LAMB boa in WrAscaped areas where poubloL The ap-
p mp lion mvkWrqagwW(PWmCountydCkyc)fTu=m)shoLdd
be OmKdbd rogwdhg restriafts an use ddqwobs forrew dim
purposel in landsc@W areas.
RL
Rmwofm ftsin v"s f= a*mrg i ow niqWvantam
Mkft
t=
0 roWm wrap on;awffordis wmwdabi% bcMe m less ftw
quwft used amm
F-71
63
Site basin to encourage mum* use.
4.12. PA00nol FbCUItIft
In an urbankubutban 1% 01 IN' 3, 99"val CIMIOPM may CONabOratD, IV
construct a common basm to serve more ran one project. At On scak?
connection to community recreation or open "Sterns is irripor-
tam Oftentimes, facilkes of ft sm can create an OW SYSISM
or be the cat*w in Planning for om Rdet to "Guidefines for the
Development of Regional MuWp*4)se DententiOl WTWM ..": -. Basins in
pime County, ArWorW, rM for b*xmation regarding such basins.
Guldelirms: SbV Regional Basins
Include comprehenstye assessments of environmental impacts
j(vMWWjM&jFMS, vAWW tlydmiogy. viewsheft) in the siting process.
Larpr numbers and Varieties of PDOPIO May be WOMd by Oft
selection and multiple-use cppOrtUnIfift; research and. plenring
effo, should rellect 00s.
4.1A. Roadside 88111116
Retention basins located roadways can function as a bufler or
screen be Neon, *W d3ci and ffu*rsWe9ts6 and c a ide an attrao-
tive entry space for a now devielopmerit poJeM Comply with all W
plicable right-cf-yvay, traffic salft and landscape ordinance re-
quirements and polices when siting roadside basins.
64 F-72
4.2 MUIdPIG-U98 001710OPts
spea mukkm alternatlims bra rew-w-betention basin should be W
propriaw forthe size and owifiguinfic POMwbasKandreisletosurrounding
land use. Approprift Low Include:
Pj Amenity
Active Rweation
Passio lFlecreation
Lftban Open Space
Pi to mman and entmosment of native Plant communities
Mnissfing for m&dqp and re-use
Wildlife Habitat
4.LI. P. Amenity
In lissimplestform, felentionardetention basins9muld be much more
Om an engineering facility designed to control stornwwater The ability
of a basin to function as a visual amenity or local POW SWuld not be
overlooked. Asa landscal3edspam ftreare
M underftguidelinessettO intimmanual. The bash
can pi tx.Kft Iselings of lower densitydevelopmeM add Uvograptiie in-
Wriest to As Wrain. and function as a rode or local, point wMin a com-
munity, especially 0 it is* landscaped as an casis in o#wrwise down
environs.
4.= Active PAcreaticin
Activeieci invowes boMstructured and unsrucWrodactMtiesw
quiring physical activity Actim recreation often foquwn larger basins.
These may include:
Jogging
BiPYcling
PWffound Activities
Fitness Training
Equestrian Activities
Skate Boarding
Rober Skating
Field Sports
own Spwts
Lawn Sports
Hoiseshoes
Golf
Baboon Launching
Then activities have Specific spatial, orientation, or equipment.need&
Site furnishings and recreational equipment may be located in or out.
side of the flood zone.
F-73- 65
cumennes: Active PacreatiOn
PfavideadequatespeM con tOm Midgroundplamusevients
for saoh desired use.
I night use is desired, bght poles should have wre connecbM
(and.haral-holes)'m Pal clabovel1whighwaWnsart
AIN WATZW
L1115
Awme.pmlbw&wnapforpavedwrbminfttmdwm(mW
to Chapters 11 and 91 of thb.manual for minftnum slope require-
mom), or
Use porous pamment% where permWAd, in #w flood zone.
L
.0w,
W-
PRIAM
F-74
Paz$
17?1
Use wnmft wO coated MW.pmducts ~ the flood zone
Avoid the Liao of wood.
Lbe veglemon, weeparate activity wow and provide, shade.
4 0 A Pmlft FISCIMIMMOn
Passive recreational use Is Vpically oriented to small groups and in-
dividual users. This multi-Lm concept don not ~ require special
to F 1111 1 e s, nor large areas of space Site design should delineate spaces
and Myode turnishings or convenienow tor usem in a relawd moft.
Passive recreational uses include:
VwMng People Watching
Sittingffielaxing Concert Going
Fleading Nappft
VVdft or Sketching Picnioldrig
TWM Native Study
Suntiatift Star Gazing
Board or Card Games
Quiftfines: Passive Recreshon
Provide a variety of places, structures or furnishings for people to
SIL
F-75
67
SaWaNsItelu., IngsbrtheWWoranceloburWadconorlocate
outside of inwKkmd areas.
Looffie she funishings lor kxkvkkad pmnscy old forsmal groups
Use vegetabon tD stmWe sMing areas and separate spaces.
F-76
68
42A Urban Open Space
The opportunity to use basin An primarily as open SPIN is Wongly
urged. Open space within urbanized arns Of Ph= COurdY is b6CCrn-
ing more valuable as growth continues. Open space PfoWd8S
PsNc,ha-lavim- reWftom man-made environnMISOW PMAC198130M"'r
;W11-or- -- in enjoythe m"Woom vegetation also to" filler
noadma mideriols. from the air.
Suldethm: Urban Open SPace
Prcvide avwwtyof visual sequences from both within and outside
the badn.
E q:l Min the role of plant materials provide 001% coftasting
tome and todureL
Provide access to the aft from a variety of pointL
F-77
so
I
"m
r??
Site basin whom it is highly visible arid con be enjoyed and uged
by MsWwft
42.L Preaervation Of NEUM Rent -
Tumft saw of regionalism isoftn threatened by rmw developroo.ent
replacing the native Wx%cape with MV&W mWerials. and m cc d r plan-
*qL Preservation of native plant cormunities and topographical
knam rnaintairm the distirclive character of ftw Sonoran Deeert- This
isespecimayappmpriamawigsomnicroutes ormawommoftmand
business; areas. Addftmal berwft Include Its wildlife knibitst valu% low
water-use requirements, and lower development costs. This concept Irr
eludes both presmed and reoestablished neUmal environfnents, It is ap-
prophate at any scele, arW may be cornbined with odw Low
Guklelkmm Preservation of Native Plant Communities
Preserve adsting plants and landlo... s whenmar poesible.
Minimize disturbance of the area during comeftellom
If revegetating. use adsting species at exisftdensttim
TrwmpimrouianvmwW&s=opftWaped,,m lonewleca-
tons 0 V" cannot be preserved.
Provide WDIWWned pedestm paths Vmugh the aft
Provide educational irdormation about the oft in the form of
signage or pamphle% where appropriate. .94
alw",
70 F-78
42-L r HArvestiOng for ROChMP and RO-use
A basic water WWsdng-SYBWM MIGh" Of three =MomnW' coliac-
tion. MMM and. OWW&km, Since. giomwister mWOW delenitiort
runoff, some sim,
beaft will,alresidy be designed to collect and SM
pie addffioris?may,allcw hiirvesling the water for m4m
Water may be Mc e f] in basins designed SPedficaIlY to augment the
%M" rmpplyattheirlocationS. ThM bBWMMwW be s"d ac-
cording tothq guidainee inchapters,11 and M Olihiarniiinual. No formal
diiipersion is . nquired otherIthen m9O . oft to MOXiMIN the Potential lot
water to Percolate through the sol and reach the water table. Prm Coun-
ty Health Department reciuiremenis must be met in addition to the nor-
mai review requirementL
Guidelines: water Harvesting Ilor Recharge
So and basin design should allowfor maidmurn surface areacon-
tact between stored water and the round.
Al d9lantion basins, use berms perpendicular to direction ot low
iDslowwaters,idftrmeml=whhWPWXMMMWmiw$Odi-
ment accumulation by MvMhV a willing basin at the basin inist-
007,
Where water is stored for re-use, infiltration is usually prevented, and
either passive or active methods of dispemion are proAded. Runoff may
be Wilized en4oule to the storage basm. while it is in the basin, ordispem-
ed to off-aft iocoons. Uses include irrigation. recreation and augmen-
Ill ?
M brwmmefc!WwatermppMLCanplywfthakpubbeho0h
regulations regarding the Use,of stored runoff.
ftnoff wawskndbrfe&wporfeuw"pomdmfwtffwMfe*f?-
tiorimWifer. AbequMbaemomptormftrdimffmlbepwk*d
at all tmes in addition to the volume pfmrkW for harvesled water
F-79
71
"W
eukbUnes: VVMr Harvesting for PAkM
Ted solls ID Increase hipsiensabW with paraft, sodium
e.Morki%cky,orun.ankipme,esh's..w.dxw JwCwadTLv
son VMer and tto Pima County HoMDepartment i e9w dh ig the
acc&PUMItY Of #ww materials In fie... of to* ~ an vmwr
Ske grading S.hould di t dw runoff fA #0 SOMP kcft-
Sde gredhq may ditect runoff to landscaped areas lor dired use
prior to colWetion in a basin.
LOWerground amp may be used.
42-7. VVMHc HIabIM
The three base mqugrements for wadoe habitat am food, cower and
water
prmdmg #me requirements vAl, aftract wildlife. Food Plants in-
elude grasses and Jorbs for 9 & g aM na KbMseplanIssuchasmes-
quiW saltbush and hopbush aMd.PMM whch PO*" frUft Or 899CIS.
suchashscW)g"
, Wurn, wWjoiob& 0mrprovides shelterand tk*V
plaoes; for wildlife, arid can be MwAded by placin donse plantings away
from heavily used areas.
F-80
72
a
AVW -
"Wi
all
Link basin rwiggetation tD herAy vegetwed areas off aft and
densely?ied corridom or drainap channels OW washm
it
use predorninentlyngm pkmwith dmnitym spedes. size and
twm.GmwWommgspeciWnmpWasmandtxbs. provide
good gramng. Avoid rnonocuMM of MR UM Or grasses - SM"
for a waffi4eyefed effecL
Md
73
F-81
Control human Lme of the aft by dearly defining vaW
Provide opportunities for people to vmww*ft in areas least likely
ID distuib them.
4.3 Technical Requirements and Guidelines
4Z1. Basin Configu NO i
Shape. slom depth, benching and muMpWtasin configurations we
the pnncqW considerations of felenborddetention basm grading tor
visual quality. AcoeMbe grading solutions sho, Wow the saim con.-
COMS for Proportion and aesthetics as with decoraWv landlon, . Con-
textural fact= #W irifluefice baw grading and configuration we:
Required floodwater volumes and engineering design
Surrounding land use J*1
She land use
Surroundirig topography
Unique afte features or vegetation to be preeerved
74 F-82
Availability and cost of additional land, if needed
Intended surface treatments
Points of access
Visibility
Desired visual character
Access for regular maintenance-including landscaping,
recreation facilities, floodwater control structures
Safety concerns
Project budget-including construction and long-term maintenance
Basin Shape
Basin shapes tend to be related to the size and shape of parcel of land
dedicated for storm water retention or detention, the desired visual
character of the end product-naturalistic or geometric-and the func-
tion of the basin, whether only for flood control or multi-use purposes.
Guidelines: Basin Shape
Where possible, dedicate an irregular tract of land for use as a
basin site. Use open space areas between building groups and
at project edges.
Vary the shape and side slopes of the basin and maximize the
linear footage of perimeter.
75
F-83
a-
Curvilinear shapes are preferable to geometric ones. If rectilinear
or geometric slopes are used, soften the contours with minimum
10-foot radius curves.
awd
EW,-TTC-P,
..BEE5r
Ina
76
F-84
0093
Combinations of geometric and curvilinear shapes are acceptable.
Basin Side Slopes
mariation in basin side slopes adds visual interest and enhances the
edge quality of the basin. if side slopes are too flat, basin volume is
reduced and Visual quality is lessened. If too steep, erosion may occur
and maintenance may be difficult, in addition to potenfial safety hazards.
Slope grading should achieve a balance between engineering functions,
mufti-use factors, and visual attractiveness.
Slope requirements are expressed as a ratio of horizontal to vertical
distance.
Requirements: Basin Side Slopes
For basins one acre and larger, use varying side-slope gradients.
The recommended minimum horizontal distance for each slope
gradient used should vary by at least two feet: example 31/51M.11.
Provide smooth transitions between grades.
In basins containing human activity zones, access slopes of 8:1
or flatter must be coordinated with these zones for easy exit dur-
ing flooding. There shall be a maximum of 100 feet either to the
base of an access slope or to a 4:1 basin side slope.
5-- 1 '4_-UOrt7
Continuous uniform slopes shall not exceed 20 percent of the
basin perimeter.
Transitions from slopes to level ground at top and bottom of basins
shall be smooth curves.
Vertical depth to be measured from top of slope at lowest point
on basin rim to toe of slope at lowest point in basin.
Multi-use basins shall be required to conform to the following
slope-to-depth ratios.
Less than 3 feet deep:
Maximum 2:1 for protected side slopes and
3:1 for unprotected side slopes.
3 feet deep and greater:
Maximum 4:1
.0?
Curvilinear contours at area inanedialely adjacent to wells or
structures an encouraged.
Structim such as retWnhg waft are acceplable lor up to 35%
of basin perkneler Refer to the latest 0420M Of #0 LkIlf0M
Building Code for lenchig requirements adjacent to building
structures.
Basin Depth
The depth of retention basins Wfects the desired visual chmacler, the
perceived-scale of the tacft, safety when skmmvaler Is retained, and
visibility into the basin for supervision.
Paqukements: Basin Depth
A beriched configuration will be required for basins in excess of
six fast deep.
Benches within basins shall be proportioned so the bench width
is at MW three tinm the height of the slope above it, measured
from ft lowest pofft an the top of the slope above the bei - The
wadmum bench width shell be 6 feet.
Y.
Mlk74
F-87
79
oi?
Matmurn depth to fM be. tea orbasinbotton shallowdoi.. to
the sbpe4epth Mo of the previous section.
In larger basins gMW #M Oro acm In SIM avoid WO WnSlS-
tent depth whm possible unless required br playing Ilields- Use
earth ban= to provide topographic kit~ or IslandS 1111300 the
Good level.
aim
0.0
mufti* Saaft
A series of basins is useful on sites with excessive sbmwMer volumes
or a large land area amilable tor retention or detention. Multiple
can reduce the perceived scale of the tacifily.
Requirements- Multiple Basin
Whire the single4hasm depth required exceaft 10 fest or wtwo
the basin volume nwr e P rip 50 acreleet multiple basins shall be
used or guidelines from the manual entitled "Guidelines for the
Development of Regmal Multip"se RetentimVDatention
Basms in Pan County, Ari?' rM, "I be employed.
so F-88
An? and gM*V of multiple baw bollifies should mftd
and gnhwm bcal uVography. Refer to stale dam MqUir9mwft
Op",
enwer perimeor allms for more screerwo, wildlife COM, ViSIUBI
korest, and Weding in use areas; OUISift Of the b8sin&
U reagational use is planned for the s1w Wm tedities in higtwr
of tte basin to avoid.frequent inundation.
Searrity Barriels
Becauselettelffic-01- -- -iJonbasipsavedestnedloholdwaterfor~
pgriods of time, SaWy p I rq=ftns must be taken to prOW the publiQ
The mg4emenis and guidelines in V* manual were clewfted, in paM
to preclude any rood for fencuM. such as chain link. around reten-
Sorneinsumcesmayhoweve;requireplacement
d security bardem Security barriers may be constructed of vegelation,
mason, wood or &,Wn Ink. %%gets*m, or a combinaWn of %*geW
*m wW strucUral maleftla, Is preferred.
F-89
Fwsdng at Inlet and WW WUMMS, If required, OW.not rGsUW On
hydraulic capacky of the,structures.. kneft details amid be alown
an the impmwment ph= or development plan, whom appropr1ift
Requketemn for Secuft Banim
Socurity baffiers must be provided at the top of all side
slopes steeper than 41 where water depft exosed 2 left
%Aegetative barriers must be of a width equal to or greater tun
overall twighL Density must be SUfhCkft to IN*. C 80000M Plant
selection must be cwmftnt wtth the Pima County -Landscape
OrclinAknos.
Uf
% -%;U,4jJW
MlY. -
A minimum 424rich barrier height is required for aM begins.
Noire!
W? H.
- * - V*fa
14V
Detall sedons of proposed fenoss, If required, are lo be shown
on -MwV and Vicling plans or development plans as qpqxWL
Locat private bash fanoes. must be 42 or hWw an any side of
the basin where buildings or odw restrictW structures we within
5 feet of the basin and have no points of exit or entry Into the basin
area. Combinstions.of thisoption with cthwiendng may be used
as
E::?
82 F-90
if vegetsr" sersan" is LM94 piant nuftrisis Must be in Place
and osMbUshed at the *m #0 occupancy pwMtt is m*mWed-
plovidgmsnpasmquiredby"Unikm BulldhVCOdefOrw
taining waft an any Mist and outlet, wucture headwalls WW
wino"lls-
pmvidg sign to hd(x to the public ofthe purpose of the basin and
the potential safety hazard resulting from stormwator
..Danger
This basin is designed to polect
'ger
LThLs bi a ed 7to
,stormwater runoff.
Do Not'Enter
Ct
C?019
uring rainy or.-threiiening w?eather
Mims, Outiou and Spulva"
Basin Inlet and cuft structures; may be at or below grade, or a cwn-
bb of bolh. Engineering and safety considermons vall play pmnwy
roles in the design and Sizing Of UMM SVUMML However, their vWW
characker should be in keepft with ovwWl basin design, landscaping,
and multi-M pommilials. especially where structures are highly vhdbhL
83
F-91
Guidelines for Visible WeLfOutlet Shucturm
Prowide submirface'drainage cow gs whemer inowning rtmoff
aoun pedestrian paths or sidewalkL
Stabilize soils afound Inietbutlet structures to deftr erosion
Section
Avoid placing SOIM*p wftMn ffmoor sigtt lines. if no aftmetWe
location is available, meander and wreen #wm from view.
84 F-92
4-3.2. l3asin Landscaping
Retention basin landscaping should respond to the recessed nature of
the landform, the scale of the facility, its potential for mufti-use, and the
occurrence of frequent flooding. Plant materials should perform the
following functions, where approprWe:
Define spaces for multi-use activities
Provide shade and wind control
Act as a screen or buffer
Attract wildift
Add visual interest: te)dure, color; skyline sillouette
Protect the facility from erosion damage
Landscape Themes
Riparian Landscapes are informal and rustic with curving lines, natural
materials, and a relatively lush appearance. Densely ak-issed trees and
diverse understory growth are important features. Plant forms should
be natural and free in shape Trimming or thinning is done to control
the size of plants but there is no shearing or shaping. Both native and
introduced plant materials may be used to create riparian landscapes.
85
F-93
1W
Transitional Landscape include plants that look at home with the or-
namental landscape and the existinng deser', vegetation. The main func-
tion is to blend two iandscape types tcc--,her to create a LniforM Whole.
Natural Landscapes include plants nafm to tte site and are rx)t as lush
in appearance as riparian landscapes. These areas may be enhanced
by the addition of similar non-native drougWolerant plants. Natural
Landscapes are inlomal and placement of plants is rarKkxn and should
be done as naturally as possiblee.
Fbnml Landscapes are created by prod-,cIng a feeling of geometry?
precision and containment. Plants that grow naturally into contained
shapes or accept training should be used.
86
F-94
Urban Park Landscalm are informal and open. LaW shade Vow and
useable areas of grass are important features. Trees should be massed
to enhance the scale of the space and define activity zones.
Seledion ano placement of plants must be compatible with flood con-
trol, as well. In general, keep vegetation out of flow charmels and away
from inlets.
Guidelines: General Planting Concepts
Preserve existing vegetation as much as possible.
OT 141
... f 41:lrl
Mass vegetation, varying the degree of diversity, size and texture.
F-95
97
BaWn 9W'skxm nW be p1mod IND 1109ldl or accerguM the
Fbr jqUo It L kcftd a*cwd lo aftrW fdkmougllla piwlw
am= shoWd account for at W= 35% of #w toW b"n OfM
ftft manals wn be gmuW on berm to cfaft an Wand
one&
09
- "aof
We vegetation in conpiction with bwmsto sciven Jances orflood
control struch res; where used.
Plant materials for use In reandon/ delendon ham* - n should be able ID
withstand periodic Inundatim Landscape design should comply with
aMbmbeckywocmrvtympAdbmwdmnmswWpdan Fiarnort-
fkxxAng plant materials should be selacted tram Clupler %7Z
Pima County Zoning Oode Landscape Design Manuel (OMber IM?
For locations wilhin the food zone, Los the varieties shown on the IM
included in this section, which have been selected for tolerance of irt-
undation. Sobs br backfilling planting pits within the tood zone, should
be appmpriately amended for wet and sahne solls. Refer to Brooks,
1984. f6q
Guldelinse: Wil Preparation tor FUnting
To Prepare soll for Wd installation. distribute 4W pounds of
granular soll suiphur and 2AW pmub of agriculturaJ gypsum per
acnL Disk thoroughly to a depth of 6 IncheL Dial" operations
shot be conducted only when sollis not ==s!%*, moist ordry.
Backfill mbos for Vee and shrub plai kting pft should be based
on aft soil oondttionL The tollowirQ mom should be used:
Sandy loam soft - 30 % wood fiber muk4% nftW slablized -
70% site soil
Clay loarn soils - 3D%b wood ftermulch, nkWm sWbkmd- 35%
send - 35% 8ft MR
AdcL per cUbicyard of mbc - 5 pounds 16,M brftw - 3 pounds
granular soil sulphur -.20 pounds agriciiltural gypsum
Thoroughly incorporate U i , into the soil mbL
Iteas may be used on basin side slooss boom and
They may not be planted in fbw channels.
0.1
90 F-98
W- 1-5
aukk4nea: Lime of Tress
Provide a minimum of 20 Von per acm
Minimum an size should be 15.9don oran 9**aWt hoWt and
caliper . set toft by the American Association of Nurserymen.
Thirty-three percent of Von an wW basin aft dwuld be a 24 inch
box orlerger.
Masstressingroupson-sistingoltim ormore.Distancebet-
weenl1runlad individual Vess in wri grouping should be no
than 75% d Its mature crovm p i - P,
The following waresties of tress; are recommended for use in areas
subject to inundation.
Botartical Narne Oonmw Name
Acacia Acacia
Cesuafft equiseftia
Casuarina st ic Horsetaff tree
Beefwood
Ceft reficulala
Cercidiurn floridurn Canyon hackbwry
Slue palo vwde
Cldlopw Imeans Desen willow
Eucalyptus microtleca CXx*bah tree
Eucalyptus carnaldulensis River gm
Eucalyptus sWeroxylon Red ironbark
Eucalyptus viminalis Manna gum
Goijera parvillora
fitsia viacanfts
C
N Australian willow
I
K
Sainefilwo Money Ioct ist
Parkinaonia aculesta Mexican palo vwde
Pfthecellobiurn flexicaule. TW= ebony
Popukls fremontr Fremont cononwood
P, w MOKAft species
Sahx gooddingill ing's, w.illow
Sophora secundillors, Mescal been
Thmarix4ow Aftl, tree tamarisk
Vmw agnus castus MonWs popper tree
for salt tolerance.
91
F-99
Shrubs
ftrubs maybe planteden basingidubposooth abonand belowthe
lood ZM9? in th 1 9 pW4*1", and with special procaubonS, In the basin
bcMM. They may not, be plarod In flow dWmWL
QuWoNrmm Use of Shrubs
Use in masswrow ve single placement for accent up@ com a ns.
Minimum number of shrubs in sny one moss should be fim Vary
#0 number of kKwk" plaft from 9 1 roup to qroup? A minimum
of two shrubs tr each tree iS "WIPPAMO&
0
Distance between shrubs in any group should be no grealer#=
75% of Is me" spread.
35% of shrubs should be 5 gallon. The minimum shrub size is I
gallon.
Avoid placing shrub mason in flow channels.
For beam with the food the *Mm&q vanobes, which haw
been selected lorialerance of inundation, we recoininim
92 F-100
NO.
1W. -
S%M?
Bourdom NMW Commm 111M
Atriplax lerdllorn* asBrOWWr@* Brower Saltbush
Bachaft salothroidw Desert Elroom
canalOnla $POCISS Birft of Pamdise
Cmkqmiw Cassia
Cortaderle. $0111loon Par IF I arm
Dodormoavh=sa HOpbUsh
Se"W" SM*W fthl -g Olverberry
Lmeatidentote I crocom
Loisum OponimW Japanese Prim
Nerkan oleander Oleander
,Xybwm oongesturn xybmm
*'Reconmended for saft **Nwm
Woo - am
face pwft tud gram& arid elmnorg grasses. They my be LAW
arWwhem on the bum ska.
W!"1110C. use of WDLWKkmm
Do not im deneely ffoOd groundcovers wft t"hIS Mr "ft
Mal
hek" Of gmffxbmK
MW be used wiwm smsion =*W is fwcessery.
Plant in ffmm in scale with size of basin.
The IcUmM vanstim which have been selected for %ftmnoe
of inundation. are recoin-randed for use in the flood mns:
Acacia Pico Acacia
mriplauffeaccow Austrarmn Saftbush
09nothera drimnondii Baja Primmse
a berlaridisti Madcan Eveningploolu
vinca traw
Cynodon Cladwon Bennuda Gram
'Pacommended for saft Iolerance.
93
F-101
Bornaft grass may ordy be Used an SPOM ftft Or UKAN-M Pl@Y
fisids. The use d Bsmwft 9 n%W corr*ly vf4h applicable City
and OxWy F09UWWM and ordWdMWL
While.#* Mandng of iridividual Veft and *wubs is desirable ft is kn-
Practical br achieving revogetstion over large shes. Grouncloover plant-
InmMh desm t
cow and In orosion. Soodkq,is the =W pracftal way for
achisving this "-of wagelabon.
Guidelines: Seed Application
tin of "oftl; ftr revegaudon shoulcl augmw*-40 mPbm-
container pWrft.
Seed should be of the I0tsSt SUSWS CW Of PUFO IWO seed OW
shouid be dWWWOdJn original sealed pacicages boa" to pro-
ducees VMWftW Sna"iL
SON peparlbcm WW Seed scaffmadon WMId be adequate So In-
sure p apei germination.
Alggafin arm shouid be irrigated &,W loWin aconslant stift
OtMOilt"UMM98M*dttimhmbog=.Aftergwmkvftnkgw--,--
as required to insure proW I-OntCtPlWft
EMWWW" for Wasses and tft aNwid be ID sich an word
#0 the pWW seed should yield an average of at lose fm (5)
NWft planls per square tm ~ a reasonable time atterseed
Xpbcab=Babbftwdcftmowkd*wubXmmsft mkft
lo the seed suppWa Weeffied qwmnabon inte for each species
The proposed seed mbces will be appropriate for Most COndft*m On-
couttered at rsle- MM i basm in Pow CountY. HowWW, Othw
seed mbes can and shoLdd be considered.
The following plant: makrials should be avoided within the IOW =W
due ID dhease susoepdbft.
sLn=.mbq*yUa jawk
chrus; (89 Spec") , ?
Cynodon clactylon hybrids
Modem (all qxm:in)
tutescens
Japanese Boxwood
chrus
Hybrid Bermuda grass
WY
1h0s
Annual Rye grass
(On Varialies)
Wasi*00lia 1011 Wocies)
94
PSIrns
F-102
001f 7
vw?
blert Mah"We
Otert groundcover materieft we scomnonded at basin ON for
Reducing water consumption
Ease of inah Nei ance
Dust control
Erosion control
Fargeneralbasin landscaping, both riverslone anddecomposed gfw&
an oppmprialL Send may be used at playground of fitness tecilities
whom a more resilient material is desired. Overall, kurt groundcovers
alone should not comprise over 35% of the total basin ama.
Decomposed granite p a fino4wdurgd, walk-on surbee. Its
drawbacks are that it is easily eroded and washed away, ft may stain
in areas of standing water, and sift deposits are highly visible on its
surlace.
QuWelirws: Use of Decomposed Granite
Use in areas whom people walk, where gross is not required.
Use only an side slopes 4:1 or flatter.
Do not use In basin bottom.
Do not use M flow channels or near inlets.
Large diameter (eg. six to eight inches) river stone as a basin
groundcover has exhibited the ability to a six I removal by flowing
waW control eroskn and accomrnodate sift and sediments within
Its void, when placed in basiri bottoms.
GUICAeurles: Use of River Stone
Do not use in activity zones or where people will be frequently
walking-
Use lairge diameter stone (eight h:*M PkM) On SUftM wl
water will stafid.
.1
Vary rock size in area that represent natiffal drainage channels.
4.%& Emsion Connol
Erosiort control may be necessary On OW " 111015 11 - WWV Chan-
nels, adjacent to hIM or any other location where flowing water may
th onto n the stability'al ground or embankmerft Erosion control may
be done Wough revegetsfion, use of inart mataftK or a combination
theral. The use of.grasm injaw channels may offect the hydrauft
chainf"Im 'tiles ofthe-channel. Fleferto ChoK IWpqfarmore d@tWW
information an graned channel design.
In smaller arem or at high? visible locations, revegetatim for efosion
control may be accomplished by planting individual Uses, shrubs, and
rs. Sails are then protected byWage absorbeig the Impact
of Ulfing min and by W systems which hold the =0 in pism On larger
stless, seeding may be used ID augment container pbr&V Ilor
revege"im.
Inert material will "ically be used where potential for wasion is w#vm
Use of these materials should be properly engineered iiind should w
spend to aesthetic
96 F-104
OW
L--M
Inert material for, a mg h o include:
Packrip-rap(SO12i P11-madierneter?
Boulder fkm" (24 PI me and larger).
Gebions
Soll Coment
River St"
C"Otmdoe mats
Combination nwft& corisist of imrt materials with voids #0 Now
vegetation to grow up through or wound them. The result is a vwy
durable, attractive nwthod of Protectim These include:
Articulated revetnent units (ARUs).
C"Otwmn
Pip-M can be vegetated by using soll to partially All the void spaces
and applying a grass seed maL
4.3A. LWKWCNM ftflgation
Plarmwont mgabon rystems we reWred for tuff areas and most "a
of basin revegetation and landmpng. ReMetation oft (including
seeding) with native or droLqft tolerant species require a temporary
system for eftefim gemination and Willislonent.Whelfterperma-
nOM or temporary, system within the food zone must be dnvrwd to
tolerate inundabon and ant accurnutatiorm
GukWWm,. For Irrigation System Design
Piping should be zoned in the tillowing maraw, with independent
control each zone:
basin botton
basin ScM below high water mark
basin skies abon high wow ma*
rxxWmWn areas
Locate valves, co, ih lim wire corn actions. and main One out-
side the flood zom
Enclose corm lers and valves in vandal resistant boxes and
semen trom vim
In basin bottom mount sprinkler heads on swing prits to allow
for adjustment to SIR
F-105 97
IW
ow-
Un gm dnvsn dwed mn hmft in fbod zwmm
AmW usq of bwpmmm do,blipW 1 syftm.w*dn the flood
zDmLowopwmftpmwmandsmaNwnlftro ificamahowfor
st k*udm, dnggi g, mW naborAnoo probWm
ROW I.D Pima Oourdy Paft wad Recreahm alluWwd kdoatkm
pine -'m fcwfthVw hibma*m on krigatbn syMss doWgn.
Report Submittal and Review Requirements
F-107
rn
V. Report SubmKW and Review Requirements
El Submi?W Procedm
It b do to S-0 daientionNa dim , nwo w3 be Prepared
aW "', in ocr*;nction with ithe hydoWc and 40auk report w
qL*W for each drAdopnwit within Pm County or ft Otty
of Tucem Therebm ft sWxnft pnxm6n,for skruwMer delen-
tionhow ap ni to shell be kWftW to the procedures blowed when
sWxMMV hydi WW "Mulic NPOW ID Ithe appoixime MVWWkV
agency #AL. aMw Pinva County or ft Oky of A=on?
662 SOMM3191' DeterOmPAWdion Report Reqtdrerwrlts
Th6 - P o" a - provkho a Not of required Items lo be included within storni-
WSW dim WOW 0M, repoM &&nftled ID oktw PW= County or the
City d1boson In corqunction with development pMm Wd&m platsh or
pw*Vanddr~hrpowvwntpWm . . Wifetention,WM may
be subrnifted as an Integral part of the 40ologic and hydraulic report
a QId 0 F1 tr an developnentrh or as a separoW but ownpleie
import which adft? only ckentiorfttention. -WINSMOMI
mpoftwayberneqOW ftapp apinamiewingagencyatove*ne
detailed engineeft analpes we p man !, for mvW&
Me tkiwing items i9preeent the mk*mm requmwft for inclumon
wiftn a sommater
'L Cow Shoo
Two of report
&9neses nwne, aftwm? and plum nurnber
CWW8 nwrie and ad&m
Dole of report =qgsftL
Seal and agnature of the reVonsible regWWW Molemonal
2. Table of Oorftrft
List of Iables and IlIuMatiom
Seal and squove of to mWonsible mgmured polenional crA
OnIPMW
booduction
LOOMM, map Showft the pmjM in relabon lo adjacent prop.
vW.% Weetrh and waft watercourm
A I"* dew"on of the Wapa pamM.
A de=iption of the and. p mp m on JaW uen vAtwm
the draiapmeft.
r7M
4W
rM
MWI
F408
A bM MOMMY Of OW 94110WO WIN 9 NdMkOC Wd&
hydmuk studies or InlomwMm which pe Ww to the projea
Nole: Sections 1.3 will not be required when the delm Ob th
tion report Is i lagro . or' within a hydrologic and hydraulic report
which provides the necessary helon.Mm
4. ObjeCOVes OW Procedures Section
Abrief summary Ofthe purpose of#* report Wrakdonfa the pro-
jecL and a descriptim of the nwftdoWgy andlor any pertinent
-1 gW=undinpreMk the-repoi
A StaiNnOrt ofthe nu requiremenIs to
W hk M tethwe development ftwat ecl -a g
Hydrology Section
AcIal Bge4xW,iwiapwhichdoodydekomsmwhdxftau=r?-
me b alimn poft and drakup arm which may~the prplem
"dmonkidiftemnshtform an b Boon pokabeft coinsideved.
These sheels mug beclearlylabelecisuchtheta cc slaffici-may
easily be made bet-, son the dam sheele-WO #W'W,9gpord*V
ca wo - 0 stio i pokft an the ' , 11 rnap?
A summary table with a liefing of all CorumMation POIW.% Cot-
Mpg dingldrainagearmmthecalculated-s rates
for both p-.w-W-vWW.PP"IWft MffW post4mlopiner conditions, and
the-differences In discharges.
6. DefentionRefention Section
Asite plan which clearlyahowsthelm ofellproposeddean-
tionoldbrIeW lonSySWMV=kX*Igth&bCabon.=MWWtfin
of Inflow and wfflow structures. Pbw arrows and drainage divides
shall also, be labeled on the sft plan
A descriplion of how the ntion scheine will comply
with landscaping requiremients and g adii ag a iM Basin shaM
depths, and Wesiope vanations shall be shown both an the site
plan and an typIcaI cross sectiorm
Aslafement of the minftm dieftage necessaryforioutflowfoom
the basin to ocem, and an estimate of the recurrence interval of
this flow.
PASWVCir-Mftg calculation shevis ior each.
basin for the 2-,106? and 1001w tam At a minimim the
calmilOwn sheets shall cW%ft of a working; able for eeM basin
and a fouting table for each flow event. These tables shall pro-
vide all necessary data, as shown in Tables 19 and 110 of this
1W
.F-109
nmwW. Delailedessmi Y&4oudng calotiladon shoft shall be w
qulW br review 0 the *m #0 a - she grading plans, devokp-
umtPlampaminganddrainageirip nestplamorotherilinal
plans we pmvklod,ID dw approprift agwW ilor review.
Other calctsisfion sl' sets used in delarrnining to stageoudbw
IS "'m "tgrstmg94wWroM6ordhimwidc#wpmtkw dm
used in the Wain anslysm and design.
Pkftd WOW and outflow hydrographs, and waar.Surftm
OW ab m a.
AhydmulIcsmm,**m wowing d9aftof all W" and cutMebuo.
WF916 WXW-WrftkC0 SIOVMIOM IMltB Of pDrAft, W. When
- a R 0 m I - .. ftee-body diagrmu Of f6laining waft OW be provid..
ed which stow all tram MOMMU and CSICUISMS reWirsd for
T--
deletininmew Item of saWy againW sliding and overturning.
7. &nmary and Cw"Aion
Im
AbristsummwyoftheanWyseswWwndbsbmpreswftdwid*I
the report
A brief description of how the proposed devskqxnent will adhere
to applicable sWrmwater doWntioniftiftnfion mpW*m
F-I 10 101
Bibliography
Mo.
sm
Biblicigisphy
Flood Roirting
1. MEC-IFImWHydrar"hPwJ=9%UwmManml,LL&ArmyCoMs
of Engineers. January 198&
2. SCS Hadorml Engineers Handbook, Section 4. "Hydrology." U.S.
Dewtment of Agricultum Soil Conservation Servios, August IM
I TR-200ornpularPeogiwe forlPfalectFonnulation. Hydrology, U.S.
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4. Aftkon, A.D., AA Goyen, Shr4iliflosthm In Staronvater Detention
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103
F-112
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ID4 F-1 13
4w,
Hydrology
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F-1 14
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Tucson Basin, City of Tucson, Tucson Water, Planning Division. July
IN&
42. Bandeen, R.F., Case Study Simuldlonsof DryWall-Drainage In the
Tucson Basin, Water Resources Research Center, University of
Arizona, Publication #219, September 1964.
43, Deviebon, ES., -GootqdmbgyaridVOwPaomwmdtheTumm Basin,
Arizona:' Geological Survey Water Supply Paper 1939-E, LL&
Geological Survey, IOM
44. DeCook, K.L, LG. Wilson, OwowW4NaIsrR@ch@ go from Urban Runalf
wW Irrigation Returns, Water Resources Research Center, University
of Arizona, Pub! #M, May 198M
45. Hannon, J.EL, Underground Disposal of SUmnwater Runall Deep
Guidelines Manuel, LLS Department of1ransportstion, AkWal "Wway
Administration, Fbbruary.196M
46. Muqft, BJL, J.D. "edley, -Maps Showing GroundWater Conditions in
the Upper Santa Cruz Basin Areas, Pam Santa Cruz, Pinal and C40m
Ciounfies, Arizona," "ydrokM* Map Series Repoit No.. 11, Arizona
Deparunent of Water Resouross, January 1984.
47. Randall.CN,91ormweterDelentionfloi IorWOMQuellyCionual,
Proceedings of the Conference an Stormwor Detention Facilftkm
American Society of CNO Engineem 1982. ad. Will= DeGroot.
4& Rester, FLW., CLV Cady, "Map Showing Ground....Weter Conditions in
AvraAllar Valley Area, Pima and Sara Cruz Countim Arizona 1961:*
"ydmb& Map Swim Report ft 7. Arizona Departmem of Water
Resources, March 1982.
49. SchmidL KD., Results of DryWell Monitoring IbMectlora Commer.
cialSiteinthell! nix Ann, Maricapa Association of Governments,
Phoenix, Arizona, July 198&
50. Smith, W.G., Water Quality Enhanceinent Through Stormvaftr
Detention, P ocenings of.the Conference on Stormwater Detention
Facilities, American Society of Oyll Engineers, 1982, ed. William
DeGroot.
106 F-I 15
14114
OW
51.
Wilson. GA... A Cose Study of Dry WON RWhWV- W*W' Resourcos AW
ROMMC4MWP
bywritation
W Dadnage OW Charmai Design ftuxiagda forLocol Drainage, Pima
County Department oflWuportation and Flood.Oontrol DWOftt May
S& Santo Cruz San ftdm River Basin, Afton, RONOW00 ftWW*WY,
LL& Depamnentof Agricultum Son Ommmation SoMiM AAVW IV?
54. -Mosign Manual for Engineering Analysis off`luvial ftNeW ShW119,
U & Anociams, hr., March 198L
S& WIschmaierW.H., D.D. Smith, PmdicdngRaintagEonsio losses;
AIpiculture Handbook No. 437. U& Dqmvnwt of Agriculture, So*=
197&
and Education Aack,
S& Z91jer, MZ, WT Fullerton. A Th nffl=Ny*wkvd SOC1111wel
IMnsport ftntion for Sandbod Channels in Arid ftgiww Pro-
coadings of the US, Simons Symopsium on Erosion and Sedimenta-
tion, Septe. r 1983.
Construction and Design Methods mot,
sx, Hmnon.jiL,unciwgmnc[DkposWofStwmwdwRunaff Design
GuMennes Manuel, U.S. Department of 1rangortatl0h, Federal MW
migWay Admin m a at' m ?,, February 1980.
S& KMMR.H.,watev,.CuantyEnhancenwfflDesignTechnkpnsPfo-
coodings ot the Conterence on Stormwater Detention Faciftes,
American Society of 014 Engineers, 1982, ad. VVUUOM DOGRX)L
Lar
s& "aping
Ankeny, U, Civil Engineer, City of Tempe, Arizona. Personal
Communication.
OCX Btoaks, MwgwetPhyskmi&PoNWWP&mnwftmRehftdtDDesign
ibr Recroation Use at Sawwwroter Detention Basins In Phoenbc,
Thesis, ofRenewaW Natural Resources. UnKvrs1lycfArb=v4
1984.
61. Chow. Vbn To, Open Channel Hydrsuflcs. McGraw-HUI Book Com-
pony, Now York, 1954.
6Z Jones, Warren G. and Duffield, Mary Rose, Phuftfor Dry Ciftnahm
HP Books, Tucson, 1981.
107
F-1 16
S& KmW Larry, AssociW Plannn C11yof ScoftdaKArbwm Personal
Communication.
64. Naftnal Vegetation COmMW Arizona CfW;"f, Sol' Cardwrvation
sow*otArnerim LandsompinaVilft NdlWAflZ0n0P1W1W'UniW-
sity of Arizona Prur., Tucson, 197&
G& Retention "sin LarAscape 9mmj&mftforArWWThmmhftms.
Dapartrnent of Planning and Developtnent. C*tYcfChwWhK Arizona-
G& p4ftntion Basin Lamiscaping *UWI16 City Of TOn" PwkB and
Deparb-nent.
67. TmyW. paftM planm City of chandiK PersonaWornmunication.
Bas
68.* in Cordigurstion
Drainage Criteria M8nu14 DOnvsf. COWadO undmd-
G& DfainageCrileria, City0fUmpa,_PwftWbftD&parMM March 14
1960.
7t). Fhmdplai . n Management Oidinance no. 1985 FCl for PWA Coun-
ty, Arizona, May 198L
71. Men Engineering P am ureAllanuml, MeS& ArhWW Juns IN&
72. Planning QuidellnesLandform Grading Mamad, Departrnentof Oi-
ty Planning, Los Ange" California, 1983.
73. ROsidentialStonnWater-1- Cb)ecthfas, Principles, and
Design Consideratimm Urban Land budUft Washington M. 1975.
74. Scottsdale, City Code Requirernents, City of Scottsdale, Arizona.
Multiple Use Concepts
7& Everett, Chwies.AddMhWmmnen&W.WaterUseAMmwftmto Con-
ventional Urban parkland, Thesis, School of Renewable Natural
Resources, University of Arizona, 1982.
76. Hebei, Swan & McGann, Donald, Quklellnes for th eDevelopment
Of Regional Multiple-Use Retention/Detention, Basft In Pima
County, Arizona, Pima County Imnsportation and Flood Control
District, 198&
IDS F-1 17
AM",
PIMA COUNTY
DEPARTMENT OF TRANSPORTATION AND FLOOD CONTROL DISTRICT
JOHN U. BERM (on) 7404410
FAX(M) UG-1933
May 17t 1991
To: Stormwater Detention./Retention Manual Users
subject: Depth to groundwater
The 1989 Annual- Wa&er Le3M1 Basic Data Revort by Tucson Water
indicates the depth to groundwater has increased by approximately
25, and in some cases 50 feet, from that shown an Figure 2.3 of the
Stormwater Detention/Retention Manual.
When assessing the feasibility of designing a retention facility,
there must be sufficient vertical separation between the point of
discharge of the retention facility and the groundwater surface
elevation to prevent direct contact between retained water and the
groundwater, thereby minimizing the likelihood of adversely
affecting the groundwater quality. Because the depth to
groundwater has increased in some locations,, the revised data will
not significantly impact this aspect of assessing retention
feasibility.
At this time, the District is not planning on revising the figure *A*
in the manu'al. However, a revised depth to groundwater map can be
obtained by calling Tony Tineo of the Mapping and Records Section
at Tucson Water, 191-2631. ff.
cxn--.--rel y, -1,
Ck,L
Dave Smutzer, Manager
Flood Control Planning and Development Division
DAS:JSH:jh
xc: Brooks Keenan
Mike Ortega
Tim Florrison
Tom.Relfrich
Yash Desail City of Tucson
PuNc Woft SuadoV 0 201 NoM Stww Awenue 0 Tu=M Anz" 85701-1207
A0Wn=VNC Senoc-as DMSW 0 DesV EnpmeemV Dmsm * RoW CAMW PwrwQ " DrmkW? Dwoo.
Prapeft.v Managemem Dmscr e'rmnocrawn ftwv afW De*Wram Dwwon
M=,O, Rwd C)ffce 4 1313 SoLdh M= M Pwd 0 TLCBM A'V" St" ' 3-1398
Fold EngrmroV DwAcm 4 opema Dw4en Tfaac ErVo*onng Dmw
F-118
Board of Supervisors Memorandum.
DEPAMUT OF TRMPORWION AM MOD CONTROL DISTRICT
Subject: Revised -Bal--ced and Criticia B"In No pagel Of6
for Study Smsion of January 27, 1987
Recomendatiow. It: is recomended that the Board of Supervisors discuss
adoption of, a revised "Balanced and Critical Basin Map". Adoption of the Map
is proposed for the Public Hearing of Februm 17, 1987.
This item lements the o3torawater Detention/Retention Manual", specifying
in map format, those designated areas to which certaln provisions of the
NAWTAI apply.
On January 19, 1982, the Board of Supervisors approved Resolution No. 1992-FC3
adopting the language and concept of requiring detention/retention of
stormwater runoff in those basins designated as "balanced" or "critical". The
resolution directed staff to prepare both a sap dmwing such basins, as well
as design standards for detention/retention. The p= se of the resolution
van to maintain existing conditions for balanced basins by limiting peak
discharges from developed sites to values no greater than pre-developed
conditions and, for critical basins,, to reduce existing flood hazards through
detention/retention requirements.
The Balanced and Critical Basin Map van adopted by the Board of Supervixorx,on
April 5, 1992.- Since that time, the Department of Transportation and rlood
Central District has determined that development occurrJust In additional
basins warrants detention/retention measures. The revised map presented
herewith includes both those basins previously adopted by the Board,, and those
additional basins for which staff supports designation. Table A compares the
existing and proposed Balanced and Critical Basin Maps.
The following crite:eia have been used In determining which basins should be
included on the present nap:
1. Pursuant to - Floodplain Hanagement Ordinance No. 1995-nl, balanced
basins are those where the channel presently convey existing runoff, but in
which additional runoff cannot be safely contained. Critical basins are those
in which the channels and drainage structures cannot safely conveY existing
runoff produced by regulatori flows, or where habitable structures constructed
prior to the adoption of the Floodplaiu Kanarement Ordinance are located in
flood hazard areas.
2. B"ins that have been considered for inclusion are generally those In the
metropolitan Tucson area where substantial development is likely to occur
within the next decade, or where substantial existing developments may be
subjected to flooding.
The folloving paragraphs discuss each basin and Indicate the recommended
regulatory designation. The basins are numbered on the sap, and categorized
vitbi- Table A.
F-119
PM4
Am-
Subject: Revised oBalaneed and Critical Basin Map P08e 2 ON
for Study Session of January 27, 1987
1. Tortalita- ran Area: This area has been designated as a critical basin
in the Tortolita Fan Area interim noodpiaiu Management Guidelines, adopted by
the Board of Supervisors an April 8, 1926. A portion of the area had already
been designated as critical on the 1992 Balanced and Critical Basin 'Map.
Numerous flood-related hazards have been identified by the Tortolita Fan Area
Basin Management Study, including: widespread overbank flooding from natural
channels originating an the fan; vnpredictable flow paths for major floods
originating at the * fan apez; potential for flooding to cross watershed
boundaries;' rapid and spatially utpredictable @"&ion and deposition along a
given stream; flooding due to Inadequate culvert drainage capacities. under the
Southern Pacific Railroad; and impassable roadway dip sections.
2. Loma de Oro Wash: This watershed, located between the Tortalita. Fan Area
and Highland Wash, was adopted as a balanced basin by the Board on March 16,
1992. Because an existing chamel. constructed through the Loma de Oro
subdivision is inadequate, staff recommend* thin basin be designated as
critical.
awl
3. Richlands Wash.- This watershed was adopted as a critical basin by the
Board an April S. 1992. An undersized channel through a subdivision Us
resulted In severe flooding. Flood-related complaints are numerous, and
because of the inadequate channel, there Is a potential for extensive damage
during major flood event. Flood hazards are documented in the Highlan4s Wash
Basin Managemmt Study.
4. Catalina Area
a. Basin to the east of Twenty-seven Rile Wash that drains Into the mw,?
Canada -Del Oro Wash. Should be added to the map as & bal --ed basin
because of the potential for development to increase drainage problems.
b. Drainage flowing easterly Into the Canada del Oro Wash- Peak
discharges should be limited to existing values because of the severe
potential for erosion on extremely steep slopes underlain by erodible
materials. This watershed should be added to the map as a balanced
basin.
5. RIverside Terrace Ar= Includes Pegler, Naninis Casas Adobes, Citrus,
Roller Coaster, and lower Carmack Washes, as van as the West Orange Grove and
West Ina basins. Portions of this area were designated as balanced basins by
the board of Supervisors on April 5, 1992. The West Ina basin was designated
,as critical by the Board because it was included with the North Rancb basin
F-120
Subje= Revised "Balanced and Critical Basin Map pap 3 d6
for Study Session of January 27, 1987
at that time. Ail of the basins studied in the Riverside Terrace Basin
Man2sament Plan were fomd to pose flooding - problems under conditiMS of
existing development. The Riverside Terrace Basin Manageommt Plan recommends
the entire. area,. with the exception of West Ina basin, be designated
critical. Staff proposes that the existing balanced designation be continued
and evaluate for each specific development at the time of rezoning for
enactment of critical. basins requitements -1 r Interim floodplain. management
guidelines. Staff also proposes to withdraw the West Ina Basin from the North
Rauch basin'into the Riverside Terrace Area..
6. Rutbrauff Road Area! Within this area the overall drainage In extremely
poor, and drainage facilities are almost nonexistent. nooding, problems have
been documented In the Ruthrauff Road Area Critical Watershed Managemeat Plan,
azid affect homes$, businesses, and access. 1he basin Us already been
designated critical by the board.
7. FrIendly Villa md Nortbmanor Washes: Severe drainage problem
currently occur in the Nortbamor and Friendly VL12,age suWVisionsp Vuere
constructed drainageways cannot cmvey the flows with low return Intervals.
These basins should be added to the map and designated as critical..
S. r1naer Rock Wash and Valley Vievy Wash: - Mmse washes In the Catalina
Foothills area have -flooding and erosion problems caused by Inadequate
channeles diverted floodwaters,, and bows located within the floodplaft, as
documented in the necha Cal" Improvement Study. Mmse basins should be
changed from balanced to critical.
9. Vent ana --- Canyon: Seesm a of the steepness of the terraiu, dowmtrem
flooding could 'greatly Increase with development unless this basin continues
to be designated as a balanced basin.
10. Tre s Hombres; and Woodlad Va Several drainage problems have
been reported in the vicinity of Rio de Oro Drive and Sierra de Lma Way
(Section 28, Township 13 South, Range 15 FAst) due to natural and man-made
channels which lack -the capacity to convey present discharges. The Tres
Hombres watershed is characterized by poorly deflued channels an the fan
surface. In addition, the e exists the potential for breakout of runoff Into
Woodland Wash. Both basins should be added to the may and designated as
critical.
11. Bas in draining into Arrua Callen te Wash at Melipomene Wave Natural
channe"s in the vicinity of Limberlost Road and Prospect ',one do not have the
capacity to convey discharges greater than existing. The bar-in should be
added to the map and designated as balan ced.
F-121
A
Subject: Revised . allsIaLuced and Critical sasin. Map page 4 016 AW,
for Study Session Of January 27, 1997
should
12. WaterAhed enterfur Tanone Verde V his V"h
use of inadequate
7
be added to the map and designat!d=?Lti ?be?='!
drainateways and current drainage problems in the Foraniner's Co=trY Club
Estates subdivision.
13. ftrnm4ner0s Wash: Drainagew?iys within Fortyulner's Country Club Estates
subdivision cann t convey existing discharges. The Watershed should be added
to the map and designated as critical.
14. Hidden Hills Wash and small vasb at Songhton Road-- TAU two Watersheds
have already been designated &a critical basins upon the request of the City
of Tucson. rlood hazards which already exist within the City of Tucson could
be worsened by upstream development.
25. Mary-Washt Portions of this watershed upstream of Valencia Road should
be reclassified from critical to bal-ed due to diversion of runoff from
part of the Earp Wash watershed into the Rodeo Wash Detention Basin.
16. Airport Washl Under existing developed 4%ODA4tims there have not been
flooding problem In the mi=Orporated portion of Airport Wash basin, but
flood hazards win exi t vith4m the City of Tucson if the upstream land is
developed. Also, the Wash flows across the Tucson International Airport as
sheet flow. To prevent downstrem flooding and to protect the airport, this
signated as balanced.
basin should continue to be de
17. Jullan Wash and Rodeo Wash., These basins have historically had flooding
problems, especially near Littletown, Palo Verde/Valencia and along Interstate
Highway 10. nOod hazards have been documented for the Julian Wash by the
Arizona Department of water Resources and within the City of Tucson limits by
the Pederal Emergency Management Agency. As part of the Kalb Corridor
Project, Pima County has scheduled improvements and detention basins which
win reduce flood peaks to the capacities of existing drainage facilities.
However, future upstream development should . be required to maintain this
improved flood-free, condition through the =a of balanuA basin design
criteria.
18. B1 - ack Wash Area: We area LwAudes the portion of Black Wash upstream
of AJ Way and associated tributaries. Historically, flooding within a
portion of this basin is severe and occurs an an annual basis. Flooding
10
affects major transportation routes and homes and businesses. Especially
flood-prone lands near CardJ--' and Los Reales, have already been acquired
with funding from the 3.994 bond program. Drainage improvements are planned in
oft
MW
F-122
Subject Revised rZalanaAad aud Critical Basin Map
for St=dY Session Of JanuavY 27, 1997
page of
5 6
conjunction with road constructlon near Sopp Road and Tucson Estates Parkway.
Part of the area was designated an critical in 2992. Additional areas
upstream of AJo Way have been added due to existing flooding problems in'the
vicinity of. Postvale Road, and the potential for upstream developomt to
increase flooding.
19. Valencia Wash Areat This area includes Valencia Wash. and other
tributaries 'to the West Branch of the Santa Cruz River. These basins lack,
adequate channels and outlets,, but the existing flood problems are. not yet
severe. The area should continue to be designated as balanced.
20. MtsInse This area is affected by flooding which severely
limits access, due to the WAMerom roadway dip sections and inadequate
culverts. Inadequate culverts# hOvc"re may be servimg detention needs. The
flooding -Onajtions are described In detail vithlu the Tucson KOMtaIU Basin
Management Plim. At this tiMe staff Proposes to evaluate O&a Specific
development at the time of rezonin for cuLctumt of critical or balanced
basin requirements rather tih- designate the area as either balanced or
critical. The formerly bal-ced Painted Hill basin should be Included within
the Tucson Mountain -anagemen area.
21. Green Valley, drajnareymm A- 4- S 9 V%- and 17: These basins have
been studied by Pima County and the Arizona Department of Transportation. The
existing culverts under Interstate Zighvay 19 are Inadequate and cause
floodwaters to pond. As a result, neighborhood$ are flooded and damage to the
Interstate has occurred. Basins 3, 4, 5, and 17 should continue to be
designated as critical.. Watershed 9 is also characterized by severe
erosion, while iratershed 13 is subject to flooding which breaks out of the
eban"el. The designation of drainateways 9 and 13 should be cb-zed from
balanced,to critical.
22. Green Valley! Drainagey-MM 1- 2. 6-4. 10-12- 14-16 and 13-25 in Green
Valley currently have adequate capacities to convey runoff, btt culverts under
Interstate Highway 19 limit the capacity of the system. These watersheds
should continue to be designated as b-1-ced to maintain the capacity of the
existing system.
23. Mo. Gibs2n_ A==-. Should be designated as critical because of
existing drainage problems in the Hower Brown subdivision.
Respectfully submitted,
Craig V. eConnell
(Acting)
Direct &?
F-123
Pao of
SubjeCt: Revised -Balanced and Critical Basin Map 6 6
for Study Semlon-of JanuarY 27, 2987
TAKX
BALANCED AND CRITICAL nksnm
As Proposed to the Pima Comqr Board of Supervisors
Jazwary 27, 1996
BALANCED BASINS
As Promosed CRITICAL BASINS
As Proposed
Loma de Oro Wash Tortolfta Pan Area
Catalina Area Highlands Wash
Ventana wash Ruthrauff Road Are-
Melpomene Way Area Pri endly Village-
E&M Wash, 'UPstrem of Valencia Nortbmamor Wash
kirport Wash Pinter Rock-
Julian Wash-Rodeo wash valley View wm&
Valencia Wash Tres Hombres-
Green Valley #1-2, ", 10-12, Woodlands wash
14-16, 18-25. Soldier Trail Area
Fortyminer's Wash
Previous (1992) Hidden Hills Area
EarP Wash# dowstream of
Loma de Oro Wash Valencia Road
Riverside Terrace Black Wash Area
Pinter Rock/Valley View Wash Green Valley #30 40 5, 9,
VeUtana Cowon 13, 17
Airport wash Ajo, Gib&on Wash
Julian Wash-Rodeo Wash -
Valencia Wash Pre Ions (1992),
Painted Hill Wash
Green Valley 1-2, 6-16, 18-25 Tortolita Pau Area
Highlands Wash
Ruthrauff Road Area
Hidden U4118 Area
Earp Wash
Black Wash Area
Green Valley 0, 4, 5, 17
Aw
INTERIM GUIDELINES
Riverside Terrace Area (InclUdes West Ina Basin, fazuerly part of the critical.
North Ranch Basin)
Tucson Homntain Area (Jzmludes Painted Hill Wash, formerly a b&la=ed basin)
F-124
om?
APPENDIX G
P- 2000 Revised Development Requirements for Drainage in Nortliern Marana
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I . OCT- 17-0 1 ie:59 Fram:Tatra Tech 1$6 52010452TO T-311 P.02/13 Job-610
MARANA
TOWN OF MARANA DEVELOPMENT SERVICES CENTER
Revised Development Requirements for Drainage in Northern Marana
-December. 2000-
The attached charts are provided to give the development community a simplified approach to the
caiculation of stormwater runoff volumes for the desion of new development projects in the Town of
Marano. The volume of stormwater to be retained is equal to the accumulated runoff from a 1 00-yr, 1 -hr
event and a 10-yr. 1-hr event. Charts 1 through 5 may be used to determine the runoff volume for
Projects of up to 640 acres in size. Afternatively, the storage volume required may be computed using the
procedure outfina? In the *Pima Coun'tylCity of Tucson Retention & Detention Manuel" for retention
volume calculation, provided both the I 00-yr, I -hr and I 0-yr, I -hr total runoff volumes are summed.
ff Multiple basins are proposed for a project, it is imperative that all retention basin volumes be sized to
aWoMmodata the runoff for the contributing watershed to each retention area. In the event that
InterconnecAed basins are proposed, more detailed hydrologic and hydraulic modeling may be required.
Contact the Development Services Center for further guidance on modeling requirements.
Charts 6 through 10 are intended to be used for planning purpor.0r., and the constructed volumes for
retention basins must be analytically demonstrated with the project improvement plans. Physical
verification of the consitructed volurne* will also be required upon complation of construction.
USE OF CHART I THROUGH CHART 6
To use Chart I through Chart 5. simply find the applicable chart that envelopes the watershed size under
investigation, determine which curve an the chart best describes the proposed land-use designation for
the site, and than directly determine the Volume Of 3tormwater volume, in acre-fact. that must be retained
onsite, for the given watershed area involved. Note that the first-approximation estimate of the required
land surface provided an Chart 6 through Chart 10 includes no provisions for freeboard, nor provisions for
visual or recreational amenities placed within and/or around the retention facility. Inclusion of such
elements in the design of a 3tormwater retenfion facility would, of course, increase the required surface
area accordingly.
USE OF CHART 6 THROUGH CHART 10 (OPTIONAL)
If desired by the Engineer, Chart 6 through Chart 10 May be used as aid$ to a first approximation of the
surface area that would be required in order to provide an onsite slormwater retention facility with 4H to
IV side-slopes and a depth of ponded water equal to 2.5 feet. To find the required surlace area of a
retention facility with 4H to 1V side-slopes and a lesser ponded depth. simply multiply the surface area
required at a ponded depth of 2.5 feet, as found on Chart 6 through Chart 10, by the following applicable
factor
Pond'ed Depth tin feet) Factor
0.5 4.96
1.0 2.48
1.5 1.66
2.0 1.25
G-1
-OCT- I T-0 1 10:59 From:Tetra Tech ISC 520111145271111 T-311 P-03/13 Job-580
EXPLANATOE!Y NOTES FOR LAND-USES DESIGNATIONS ON CHART I THROUGH CHART 5:
I . NATURALJRURAL watersheds generally contain no houses, to less than one house per acre, and
a;nWipated future drainage imprcrvements are negligible. Impervious surfaces generally cover less
an 5% of the watershed area.
2. SUBURBAN watersheds generally contain two houses, or less, per acre, and typically have little or no
drainage improvements. Impervious surfaces generally cover approximately 15% of the watershed
area.
3. MODERATELY URBAN watersheds generally contain from three to five houses per acre (detached),
with moderate to extensive drainage improvements. Impervious surfaces generally cover
approximately 35% of the watershed area.
4. HIGHLY URBANIZED watersheds generally contain six or more houses per acre, inrJuding Multiple
Dwelling Units, with extensive drainage improvements present. Impervious surfaces generally cover
approximately 60%, or greater, of the watershed area.
5. COMMERCIAL, INDUSTRIAL watersheds generally contain extensive drainage improvements.
Impervious surfaces generally cover approximately 80%, or greater, of the watershed area.
0?-
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