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HomeMy WebLinkAboutCouncil Presentation - Water Discussion 2023 Council RetreatWater Discussion –2023 Council Retreat Jing Luo, PhD, PE –Water Department March 2023 WATER FOR TODAY, WATER FOR TOMORROW Outline •Water Resources Management and DAWS Modification Update •Water Resource Master Plan Task Force Update (by Westwater Research) •Water Resources Acquisition Opportunities •Break •Drought Preparedness Plan Revision •Water Conservation Program Discussion 2 3 Water Resources Management and DAWS Modification 4 Historic Groundwater Level Trends near Marana Service Area Water Production/Deliveries/Loss National studies indicate that, on average, 14 % of the water treated by water systems is lost to leaks -US EPA MW is at our Target of 5% or less 2470 2787 2922 3949 4711 5548 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 7000 7500 8000 8500 Jan-20 Apr-20 Jul-20 Oct-20 Jan-21 Apr-21 Jul-21 Oct-21 Jan-22 Apr-22 Jul-22 Oct-22 Marana Water Service Area demands -Existing, Committed, Pre-Plat in Review (AFY) Existing demand, Residential (AFY): end of previous year Existing demand, Non-Residential (AFY): end of previous year Existing demand, LUW (AFY): end of previous year Committed demand, Residential (AFY): end of previous year Committed demand, Non-Residential (AFY): end of previous year Committed demand, Non-Residential (AFY): added since end of previous year Committed demand, Residential (AFY): added since end of previous year Plat Review demand, Final (AFY): current Plat Review demand, Pre (AFY): current Designation Volume Existing demand, Total (AFY): end of previous year Existing + Committed, Total (AFY): end of previous year Existing + Committed, Total (AFY): current Total Existing + Committed + Pre-Plat ~2,032 AFY remaining or 6,773 EDUs ~355 AFY remaining or 1,185 EDUs Available DAWS 6 Pre-Platted Committed Demand -Platted Actual Demand Projected Water Demands and Requested New DAWS 7 Current – 7,580 AFY Requested -15,660 AFY/51,678 EDUs~34,000 EDUs DAWS Modification Process Update •DAWS Modification is on Schedule •May 26th, 2022: ADWR recognizes submitted application •October 17, 2022: ADWR Issued the 1st Notice of Deficiency •November 8, 2022: Deficiency review Meeting with ADWR •January 12, 2023 : Marana responded to Deficiency Letter •February 2, 2023: Per ADWR request, Mutual Agreement to extend the overall time frame by 52 days •March 2, 2023: ADWR Issued the 2nd Notice of Deficiency •On track to complete by July 2023 8 It Normally Takes 3-4 Deficiency Notifications Outstanding Items for DAWS Modification -1 of 3 •Demand Estimates –comparing with other regional projections 9 LSCRBS Projection for Marana (Residential) State Projection for Marana (Residential) Projection Used for DAWS Modification 10 Outstanding Items for DAWS Modification –2 of 3 •Service Area and Water System Infrastructure Outstanding Items for DAWS Modification –3 of 3 •Specific Funding Mechanism to Fund 100% of the Major Infrastructure Projects •Connecting separate water systems •Expansion of WRF and Re-charge Basins •Primary funding mechanism is impact fee •Water infrastructure impact fee •Water resources impact fee •Water reclamation impact fee 11 12 CAGRD Holding Costs Increase FY Projected Demand (AF) GRD Reliance Volume (AF) Estimated Member Dues/Year 2024 5,000 617 $81,000 2026 7,370 2,367 $311,000 2036 12,980 5,298 $845,000 13 Water Resource Master Plan Task Force Update by Westland and WWR 14 Water Resources Acquisition Opportunities All Rights Reserved ©WestWater Research 1 5 Supply Type Owners Renewable Supply? Potentially Available (AF/year, 100 yrs) Transaction Structure DAWS Duration Relative Acquisition Cost Relative Delivery Costs Risk Factors Effluent City of Tucson, United States Bureau of Reclamation 17,669 Temporary Lease 1-50 Years Low Low-Mid Uncertain long-term market supply/May require infrastructure development LTSC Tohono O'odham Nation, United States Bureau of Reclamation × 2,087 Single-Use / Forward Purchase 1-50 Years Low Low Uncertain long-term market supply/Annual execution risk/Risk of supply exhaustion CAP Fort McDowell Yavapai Nation, Gila River Indian Community, San Carlos Apache Tribe, Tohono O'odham Nation 248,954 Temporary Lease 1-50 Years Low Low Subject to CO River Shortage/Competition from system conservation programs 100-Year Lease 100 Years High Mid Subject to CO River Shortage/Uncertain seller receptivity Imported Groundwater Harquahala Valley Water Project × 54,000 Permanent Transfer 100 Years High High Risk of supply exhaustion/Regulatory approvals pending Colorado River Colorado River Indian Tribes, Yuma Mesa Irrigation and Drainage District, GM Gabrych Family 80,386 Temporary Lease 1-50 Years Low Mid Subject to CO River Shortage/Competition from system conservation programs/Requires landowner participation and approval/Unproven transaction structure Permanent Transfer 100 Years High Mid-High Subject to CO River Shortage/Limited pool of permanent transfer supplies High-Priority Supplies Town of Marana USBR Long Term Storage Credits (LTSC) Sale •Background •One-time credits sale •Is not a Long-term Water Resources •Help with bridging the gaps •Solicitation is anticipated to be published in Spring 2023 •50,000 –60,000 AF available •Estimated unit price is $350-$450/AF 16 17 Q1: How Much of LTSC Should Marana Purchase? 2023 2024 2025 2026 2027 Average Projected Water Demand (AFY)-DAWS Mod. 4,700 5,590 6,480 7,370 7,700 6,368 Number of Years Total AF Available LTSC (AF) Credits to be Purchased (AF)Estimated Cost 3 Years of Reserve 20,000 8,000 12,000 $4,800,000- $5,400,000 4 Years of Reserve 25,000 17,000 $6,800,000- $7,650,000 5 years of Reserve 32,000 24,000 $9,600,000- $10,800,000 Most Affordable Project #1: Effluent Leasing from USBR/TW 18 Phase I (Existing) Phase III ~2000AFY Phase II ~2,000 AFY Year Total Outflow at Trico Gauge (AF) SAWRSA (AF) Tucson (AF) Marana (AF) 2014 10,208 7,213 2,051 - 2015 4,671 3,575 644 18 2016 5,454 4,337 599 32 2017 6,763 5,683 493 36 2018 8,743 8,169 147 35 2019 8,669 8,169 1,368 60 2020 14,060 10,713 2,232 104 2021 19,300 15,893 1,776 145 Estimated construction cost: $15-20 Million Infiltration Rate at the Marana WRF and MWRP 19 20 Target of Project 1–Effluent Lease for 16 years or longer 1,354 1,890 8,852 0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 Volume (AF)DAWS Sources Scenario 2 (Added Sources)Acquisition Volume Scenario 2 DAWS Modification Demand Fill the gaps by LTSC Build Phase II Recharge 2,000 AFY Build Phase III Recharge Total 4,000 AFY 21 Project 2 –Lease Effluent from CMID at El Rio Park 22 Target of Project 2 –Long-term Effluent Lease from CMID 1,354 1,890 8,852 0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 Volume (AF)DAWS Sources Scenario 2 (Added Sources)Acquisition Volume Scenario 2 DAWS Modification Demand Fill the gaps by LTSC Build Phase II Recharge 2,000 AFY Build Phase III Recharge Total 4,000 AFY 1,800+AFY from CMID Water Resources Acquisition Path Forward: 23 •Continue on DAWS Modification Process with ADWR •Prepare bid to purchase USBR LTSC –12,000 AF •Explore the opportunity with USDA/TRICO on the low interest loan up to $2 Million (<1% interest) •Project 1: •Retain a Consultant Team to Conduct a Feasibility Study with USBR as a Stakeholder •Apply for WaterSMART Title XVI grant –50% Matching •Apply for State Parks Grant •WIFA Water Supply Development Fund •Project 2: •CMID is working on a plan •Evaluate CMID plan after it is developed 24 Drought Preparedness Plan Update & Discussion Best Practice & Regulatory Requirement •Arizona Drought Preparedness Plan (2004, 2007present) •ADWR responsible, with reliance on •Drought Monitoring Technical Committee (“MTC”) •Governor’s Drought Interagency Coordinating Group (“ICG”) •Local Drought Impact Groups (“LDIGs”) •Others (e.g. municipal water providers) •Meant to address: •Conditions of Precipitation, Streamflow, Forest Health and Drought Declarations or Disaster Designations •Events with impacts exacerbated by drought –e.g. wildfires, flooding •State, community, individual actions •Set requirements for Community Water Systems to develop Drought Preparedness Plans (“DPP”) 25 Features of Town DPP 1.Council Adoption (Resolution No. 2007-177) 2.Stages of advancing drought (Four) 3.Indicators for each stage (Four) 4.Triggered indicators determine stage (Two of Four) 5.Consistency with other providers (WaterCASA) 6.Voluntary compulsory (Stage 1,2 Stage 3,4) 7.Tied to Code (14-7-4 Emergency Water Cons.) 26 8.Drought management team 9.Process for declarations & communications Remains the same Revised New    Drought 2000-2022 27 Comparison of Indicators, Triggers, Stage Assessment Stage 2007 (any two of four local indicators) 2022 (either of two indicators –one local, one regional) Stage One (Low) •Arizona Drought Monitor Precip. 70-90% •Arizona Drought Monitor = D-2 •Groundwater Level Decline 1.0’ –2.4’ •Over 45 consecutive days of 100 degrees •Groundwater Level Decline of 1.0’ -2.0’ •Lake Mead Elevation predicted for January: 1,090 -1,075 feet (Tier 1) Stage Two (Moderate) •Arizona Drought Monitor Precip. 50-70% •Arizona Drought Monitor = D-3 •Groundwater Level Decline 2.5’ –3.9’ •Over 60 consecutive days of 100 degrees •Groundwater Level Decline of >2.0’ -3.0’ •Lake Mead Elevation predicted for January: 1,075 -1,045 feet (Tier 2a) Stage Three (High) •Arizona Drought Monitor Precip. 25-50% •Arizona Drought Monitor = D-4 •Groundwater Level Decline 4.0’ –4.9’ •Over 75 consecutive days of 100 degrees •Groundwater Level Decline of >3.0’ -4.0’ •Lake Mead Elevation predicted for January: 1,045 -1,025 feet (Tier 2b) Stage Four (Extreme) •Arizona Drought Monitor Precip. >25% •Arizona Drought Monitor = D-4 •Groundwater Level Decline >5.0’ •Over 90 consecutive days of 100 degrees •Groundwater Level Decline of >4.0’ •Lake Mead Elevation predicted for January: <1,025 feet (Tier 3)28 Drought Management Team (“DMT”) 29 •Interdepartmental team led by Water Department •Involve staff with subject matter expertise •Communications •Outreach •Development •Logistics •Demonstrate / lead by example 30 Stage 1 triggers DMT Town Manager Council Implement: DMT Stage 2 triggers DMT Town Manager Council Implement: DMT Stage 3 triggers DMT Town Manager Council 14-7-4 Emergency Water Conservation Response… Implement: DMT Stage 4 triggers DMT Town Manager Council 14-7-4 Emergency Water Conservation Response… Implement: DMT 2022 Draft DPP: Stage Designation and Responses 2022 Draft DPP: Stage Response Measures Response Measure Stage 1 Stage 2 Stage 3 Stage 4 Actions Taken By TownReduce water consumption on Town properties by a targeted percentage rate.√+++ Activate a Drought Management Team comprised of multiple Town departments.√√++ Educate Town staff on indoor/outdoor water saving techniques.√√√√ Conduct water audits for Town facilities/departments (if not already completed).√√√√ Limit use of splash pads.√+x Limit washing of fleet vehicles.√+x Institute drought surcharge.√+ Limit hydrant flushing (for non-water quality issues)√+ Limit use of water for fire training & fire hydrant uses (except those for public safety).√+ Increased enforcement of existing water conservation ordinances (water waste fines, etc.).√√ Review and reevaluate new water service agreements policy for new construction. √√ Develop arrangements for additional alternative/back up water supplies should they become necessary.√31 √ Apply Measure + Strengthen Measure X Use Restriction 2022 Draft DPP: Stage Response Measures 32 Response Measure Stage 1 Stage 2 Stage 3 Stage 4 Actions Taken ForPublic EngagementOffer rebates for water efficient fixtures; implement conservation incentive programs.√√√√ Implement public information and awareness campaign.++++ Promote conservation practices and efficiency measures. Include water saving tips in bill inserts.√√++ Implement industry green measures for hotels and restaurants.√+++ Encouraged Required Actions Requested/ Required of CustomersRestrict use of misting systems, spraying of impervious surfaces, etc.√+x x Restrict potable water use for construction.√+x x Restrict access for commercial water haulers.√+x x Limit landscape irrigation.√+++ Limit installation of new sod and/or other landscaping. Limit overseeing.√+x x Limit use of ornamental fountains and/or filling pools.√+x x √ Apply Measure + Strengthen Measure X Use Restriction 2022 Draft DPP: Process to Final 33 Interdepartmental feedback and input Council feedback and input Update and circulate draft plan Incorporate any additional comments Schedule for Regular Council session/action 34 Water Conservation Programming Update - Discussion 35 Conservation ProgramADAPTIVE MANAGEMENT Do MonitorLearn Plan Water Conservation Program Past Efforts Present Efforts Future Efforts 36 Conservation ProgramPAST •WaterCASA of Southern AZ •Address system water loss, i.e. “lost and unaccounted for water” •Drought Preparedness Plan (2007 ordinance) •Develop BMPs –Basis for Annual Conservation Efforts Report •Multiple factors lowered GPCD 1997-2022 •Active conservation programming •EPA water sense / predominance of lower use appliances •Economic downturn and great recession 37 Conservation ProgramPAST 38 Conservation ProgramPAST Conservation ProgramPRESENT •Conditions: •ADWR 5MP –progressively more rigorous regulatory measures •Colorado River: shortage + structural deficit reducing M&I supply to the TAMA •Accelerated growth –residential and non-residential construction •Uncertainty and high cost for new supplies •New grant opportunities •Efforts: •Continuing past efforts (replacing WaterCASA in-house) •Marana Water Festival •Marana Citizens’ Water Academy •Eye on Water (customer portal) •Drought Preparedness Plan update 39 Conservation ProgramPRESENT 40 Smart Metering Program Conservation ProgramFUTURE•Conditions: •Continued drought •Continued growth •Supply Uncertainty 41 Immediate •continue and expand present efforts, relying on BMPs Near Term (1-2 yrs.) •Conservation Professional •Residential Rebates Mid Term (2-4 yrs.) •Program Analysis / report card •Programming with non residential partners •Additional local and regional partnerships 42 Rebates Offered by Tucson Water 43 High Efficiency Toilets 44 On-Demand (Tankless) Water Heater •Tankless Water Heaters Heat Water More Efficiently •"They can be 8%-14%more energy efficient for homes that use a lot of hot water --around 86 gallons per day." 45 Rainwater Harvesting •Rainwater replaces,on average,around 40-50%of your mains water usage. •A property owner can realistically expect to make a saving of around 45%on their water bills. Conservation ProgramFUTURE •Increased Outreach and Engagement •Citizens’ Water Academy •Rebate Programs •Instant Water Heaters •Low Flow Toilets •Rainwater Harvesting •Programs for HOAs / commercial, new construction •Coordinate contracts and partnerships •Evaluate effectiveness of current programs •Research and implement additional programs 46 Community Partners Water Resources Customer Service Proposed Conservation Program:Annual Cost Estimate •Personnel ~$70,000 •Rebates ~$50,000 •Additional Elements ~$30,000 •Supplies for CWA, outreach events •Subject Matter Expertise •Contracts •Partnerships •Training and networking •Total ~$150,000 / year 47 Proposed Conservation Program: Fee Schedule Change Proposal 48 Proposed Program Costs Annual Program Cost $150,000 Revenue Required per 1000 gal.$ 0.17 Monthly Increase to Typical Residential Bill*$1.20 Program Targets 1000 Gallons Acre-feet Pre-Program Annual Volume Sold 900,000 2,762 Reduction Target (5 year goal)5%5% Estimated Annual Volume Saved 45,000 138 *Based on average SFR monthly use / consumption volume of 7,000 gallons. Tucson Water Charges $0.13/1,000 gallons with much larger customer base Q2: How to Fund the Conservation Program? Options: 1.Increase water conservation fee ($0.17/1,000 gals) 2.General fund 3.Grant fund –not guaranteed. Staff have and will continue to seek grant funds 49 Rebate Program Implementation Timeline •Budget adoption -April/May 2023 •Development online application by July 1st, 2023 •Rebates on a first come first serve basis •Application review and approval •Issuance of check 50 Thank You! Questions and Discussion…51