Item 10 Water Loss Black Veatch Presentation — original pdf
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WATER LOSS PROGRAM REVIEW, ANALYSIS & OPTIMIZATION Presentation to Water and Wastewater Commission Andrew Chastain-Howley October 9, 2024 Report Overview 1.0 Executive Summary 2.0 Introduction and Initial Audit Analysis • City of Austin System Profile • Water Loss Audit Approach/Results • Data Validity 3.0 Production Metering Analysis 4.0 Apparent Loss Analysis • Customer Metering Inaccuracies • Systematic Data Handling Errors • Costs of Apparent Losses 5.0 Real Loss Analysis • COA Leakage Detection • Real Loss Component Analysis/Results • Costs of Real Losses 6.0 Goals and Recommended Strategies • Production Metering Strategies • Apparent Loss Strategies • Real Loss Strategies • Other Strategies KPI Real Loss (ILI) Real Loss (gal/conn/day) Apparent Loss (gal/conn/day) Data Validity 2022 AUDIT 4.1 75.60 17.40 77 2030 GOAL (THIS PROJECT) 3.0 55.60 7.40 85 AW’s Water Forward (2024) ILI Goal is 3.0 by 2040. 2 AWWA Manual M36 Water Audits and AWWA Manual M36 Water Audits and Loss Control Programs Loss Control Programs 3 Real Loss Component Analysis See Section 5.2 & Appendix A How does Austin Water’s Real Loss Compare to Other Utilities? Mains Failure Frequency Comparison Service Connection Failure Frequency Comparison ) r y / s e l i m 0 0 1 / r e b m u n ( 30.0 25.0 20.0 15.0 10.0 5.0 0.0 ) r y / s n o i t c e n n o c e c i v r e s 0 0 0 1 / r e b m u n ( , 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 Failure Frequency Austin Water Department Average Failure Frequency in North America (WaterRF 4372) Failure Frequency for Optimized Distribution Systems (Friedman 2010) Failure Frequency Austin Water Department Failure Frequency for Optimized Systems (AWWA UARL) 4 Austin’s Ongoing Efforts See Sections 4.1, 5.1, 6.1 Four Pillars of Leakage Management Pressure Management Speed and Quality of Repairs Active Leakage Control Real Losses in this range are not technically recoverable Real Losses in this range are not economic to recover Economically Recoverable Annual Real Losses Pipeline and Asset Management Selection, Installation, Maintenance, Renewal, Replacement Renewing Austin Third-party proactive leakage detection AW leakage detection program 5 Austin’s Ongoing Efforts See Sections 4.1, 5.1, 6.1 Development of strategies through Austin's Water Forward program Replacing smaller meters to transition to Advanced Metering Infrastructure (AMI) Meter calibration/verification and validation 6 Key Findings 1 Limitations with production piping and metering configurations 2 Proactive Leakage Detection and Oversight 3 Data Validation 7 Key Findings 1 Limitations with production piping and metering configurations 8 Key Findings 1 Limitations with production piping and metering configurations • 2021: Third-party calibration/verification and validation of the plants’ production flow meters • Potential sources of error: meter hardware, meter calibration, SCADA reporting • Recommend secondary testing at all plants 9 Key Findings 1 Limitations with production piping and metering configurations 2 Proactive Leakage Detection and Oversight 3 Data Validation 10 Key Findings 2 Proactive Leakage Detection and Oversight 11 Key Findings 1 Limitations with production piping and metering configurations 2 Proactive Leakage Detection and Oversight 3 Data Validation 12 Key Findings 3 Data Validation 13 Key Findings 3 Data Validation Hourly Flatlining at Davis HSPS 14 Recommendations: Apparent Loss Apparent Loss Control Initiatives Overall Cost Estimate FY 2024-2025 $310,000 FY 2026 $495,000 FY 2027 $400,000 FY 2028-2033 $1,360,000 3.5% 5.7% of Apparent Loss Annual Cost of Apparent Loss Annual Cost 4.6% of Apparent Loss Annual Cost 2.6%* of Apparent Loss Annual Cost AMI Data Management Development of SOP Initial Investment $50,000 FY 2025 Total Investment $375,000 FY 2026-2033 See Section 6.4 Apparent Loss Recommendations 2025-2033 Costs Priority Meter Testing (Large Meters) $ 1,000,000 Meter Testing Program Validation $ 225,000 SOP Development on Meter Testing and Replacement Meter Sizing Analysis SOP Development on Unauthorized Consumption Mitigation SOP Development on Systematic Data Handling Errors Mitigation AMI Data Management $ 130,000 $ 200,000 $ 115,000 $ 140,000 $ 275,000 15 *costs are annualized Billing System Process Evaluation $ 480,000 Recommendations: Real Loss Real Loss Control Initiatives Overall Cost Estimate FY 2024-2025 $2,295,000 FY 2026 $2,419,500 FY 2027 $1,769,000 FY 2028-2033 $10,584,000 1.70 MGD 1.90 MGD 2.70 MGD 5.20 MGD 2025 Savings 2026 Savings 2027 Savings 2033 Savings Real Loss Recommendations 2024-2033 Cost Est. MGD Saved Optimized Proactive Leak Detection $ 3,960,000 Repair/Replacement Focus on Service Lines $ 500,000 SOP Development on Proactive and Reactive Leak Detection $ 155,000 1.13 0.50 0.10 See Section 6.5 Real Loss Recommendations 2024-2033 Cost Est. MGD Saved Pilot Project with Innovative Leak Detection Technologies $ 1,150,000 Baseline Leak Detection Validation Annual Leakage Detection Training Vault Evaluation $ 225,000 $ 220,000 $ 900,000 Large Diameter Leak Detection $ 7,200,000 Utilize High Frequency Loggers and Develop Pressure Transient Models $ 560,500 Monitor Pressure Relief Valves $ 210,000 Enhance AW Enterprise PowerBI Reports (Leak Detection) Integration of SCADA, GIS, AMI and Logger Detection Software Develop Methodology to Improve DMA Usefulness Consider up to 5 Temporary DMAs Consider Permanent DMAs and PMAs $ 291,000 $ 420,000 $ 60,000 $ 1,216,000 N/A 0.35 0.00 0.18 0.16 0.22 0.21 0.10 0.10 0.10 0.10 0.64 N/A 16 Other Recommendations See Sections 6.3, 6.6, 6.7, 6.8, 6.9 Training, Fire Fighting & Other NRW Initiatives Overall Cost Estimate Other Recommendations 2024-2033 Cost Conduct Metered Analysis of Flushing Volumes N/A FY 2024-2025 $64,000 FY 2026 $25,000 FY 2027 $25,000 FY 2028-2033 $150,000 Update Fire Department Usage Expectations and Measurement Needs $ 24,000 Production Meter Improvements and Validation Overall Cost Estimate FY 2025 $800,000 FY 2026 $800,000 FY 2027 $1,200,000 FY 2028-2033 $3,400,000 Annual Water Audit and Validation Training $ 100,000 Participation in National Water Loss Control Conferences $ 50,000 Improve Data for Water Audit Input Data Validity Scores $ 90,000 Production Meter Improvements and Validation $ 6,200,000 17 KPI 2022 AUDIT Real Loss (ILI) Real Loss (gal/conn/day) Apparent Loss (gal/conn/day) Data Validity 4.1 75.60 17.40 77 2030 GOAL (THIS PROJECT) 3.0 55.60 7.40 85 Moving Forward Cost of Water Loss (2022 Audit) 18 Questions