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HomeMy WebLinkAboutWater Plan Update _Final_Dec_2012CITY OF RENTON WATER SYSTEM PLAN UPDATE A COMPREHENSIVE WATER SYSTEM PLAN 2012 MAYOR Denis Law PUBLIC WORKS DEPARTMENT ADMINISTRATOR Gregg Zimmerman UTILITY SYSTEMS DIVISION STAFF Lys Hornsby Abdoul Gafour J. D. Wilson MAINTENANCE SERVICES DIVISION STAFF Michael Stenhouse Ray Sled CITY COUNCIL Rich Zwicker, President Randy Corman, President Pro Tem Terri Briere, Councilmember Marcie Palmer, Councilmember Don Persson, Councilmember Greg Taylor, Councilmember Ed Prince, Councilmember PREPARED BY City of Renton with the assistance of Carollo Engineers December 2012 TOC-i pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Master_TOC.docx CITY OF RENTON WATER SYSTEM PLAN UPDATE TABLE OF CONTENTS EXECUTIVE SUMMARY .............................................................................................. ES1-1 ES.1 INTRODUCTION ................................................................................................. ES-1 ES.2 EXISTING SYSTEM ............................................................................................ ES-3 ES.3 PLANNING DATA AND WATER DEMAND FORECASTS .................................. ES-5 ES.4 WATER USE EFFICIENCY AND CONSERVATION PLAN ................................ ES-7 ES.4.1 Planning Requirements ........................................................................... ES-7 ES.4.2 Metering ................................................................................................... ES-7 ES.4.3 Distribution System Leakage ................................................................... ES-7 ES.4.4 Conservation Plan ................................................................................... ES-7 ES.5 POLICIES, CRITERIA, AND STANDARDS ........................................................ ES-8 ES.6 WATER SUPPLY, WATER RIGHTS, AND WATER QUALITY ........................... ES-9 ES.6.1 Water Supply ........................................................................................... ES-9 ES.6.2 Water Rights ............................................................................................ ES-9 ES.6.3 Water Quality ........................................................................................... ES-9 ES.6.4 Recommended Water Supply Improvements ........................................ ES-10 ES.7 SYSTEM ANALYSIS ......................................................................................... ES-10 ES.8 OPERATIONS AND MAINTENANCE ............................................................... ES-10 ES.9 CAPITAL IMPROVEMENTS PLAN ................................................................... ES-10 ES.10 FINANCIAL ANALYSIS ..................................................................................... ES-13 CHAPTER 1 ....................................................................................................................... 1-1  INTRODUCTION ................................................................................................................ 1-1  1.1 PURPOSE .............................................................................................................. 1-1  1.2 AUTHORIZATION .................................................................................................. 1-1  1.3 OBJECTIVES ......................................................................................................... 1-1  1.4 LOCATION ............................................................................................................. 1-2  1.5 OWNERSHIP AND MANAGEMENT ...................................................................... 1-3  1.6 SYSTEM HISTORY ................................................................................................ 1-3  1.7 EXISTING SERVICE AREA CHARACTERISTICS ................................................ 1-7  1.7.1 Service Area Agreements ........................................................................... 1-7  1.8 ENVIRONMENTAL ASSESSMENT ....................................................................... 1-8  1.9 APPROVAL PROCESS .......................................................................................... 1-9  1.10 RELATED PLANS .................................................................................................. 1-9  1.11 ACKNOWLEDGEMENTS ..................................................................................... 1-10  CHAPTER 2 ....................................................................................................................... 2-1  EXISTING SYSTEM ........................................................................................................... 2-1  2.1 SYSTEM OVERVIEW ............................................................................................ 2-1  2.2 WATER SYSTEM DESCRIPTION ......................................................................... 2-4  2.2.1 Source of Supply ........................................................................................ 2-4  TABLE OF CONTENTS December 2012 TOC-ii pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Master_TOC.docx 2.2.1.1 Springbrook Springs (DOH Source S05) ...................................... 2-4  2.2.1.2 Wells 1, 2, and 3 (DOH Source S10 – Wellfield) .......................... 2-5  2.2.1.3 Well 8 (DOH Source S07) ............................................................ 2-6  2.2.1.4 Well 9 (DOH Source S09) ............................................................ 2-6  2.2.1.5 Emergency Well 3 (DOH Source S16) ......................................... 2-6  2.2.1.6 Well 5 (DOH Source S04) ............................................................ 2-7  2.2.1.7 Maplewood Wellfield (DOH Source S13) ..................................... 2-7  2.2.1.8 Well 4 (DOH Source S06) ............................................................ 2-8  2.2.1.9 Seattle Interties (DOH Source S08) ............................................. 2-8  2.2.2 Storage ..................................................................................................... 2-10  2.2.2.1 North Talbot Reservoir (Valley 196 Zone) .................................. 2-10  2.2.2.2 Mount Olivet Reservoir (Valley 196 Zone) .................................. 2-11  2.2.2.3 Highlands 435 Reservoir – 1.5-MG(Highlands 435 Zone) .......... 2-11  2.2.2.4 Highlands 435 Reservoir – 2-MG (Highlands 435 Zone) ............ 2-12  2.2.2.5 Highlands 565 Reservoir - 0.75-MG (Highlands 565 Zone) ....... 2-12  2.2.2.6 Hazen 565 Reservoir - 4.2-MG (Highlands 565 Zone) ............... 2-13  2.2.2.7 Rolling Hills 590 Reservoir (Rolling Hills 590 Zone) ................... 2-13  2.2.2.8 Rolling Hills 490 Reservoir (Rolling Hills 490 Zone) ................... 2-13  2.2.2.9 West Hill Reservoir (West Hill 495 Zone) ................................... 2-13  2.2.2.10 South Talbot Reservoir (South Talbot 350 Zone) ....................... 2-13  2.2.3 Booster Pump Stations ............................................................................. 2-15  2.2.3.1 Mt. Olivet Booster Pump Station ................................................ 2-15  2.2.3.2 Houser Way Booster Pump Station ............................................ 2-15  2.2.3.3 Monroe Avenue Booster Pump Station ...................................... 2-19  2.2.3.4 North Talbot Booster Pump Station ............................................ 2-19  2.2.3.5 Rolling Hills Booster Pump Station ............................................. 2-20  2.2.3.6 Tiffany Park Booster Pump Station ............................................ 2-20  2.2.3.7 Fred Nelson Booster Pump Station ............................................ 2-20  2.2.3.8 Maplewood Booster Pump Station ............................................. 2-20  2.2.3.9 South Talbot Booster Pump Station ........................................... 2-21  2.2.3.10 West Hill Booster Pump Station ................................................. 2-21  2.2.4 Pressure Zones and Pressure-Reducing Stations.................................... 2-21  2.2.5 Interties and Emergency Supply Sources ................................................. 2-30  2.2.6 Distribution System ................................................................................... 2-30  2.2.7 Source Treatment ..................................................................................... 2-35  2.2.8 Telemetry and SCADA ............................................................................. 2-35  CHAPTER 3 ....................................................................................................................... 3-1  PLANNING DATA AND WATER DEMAND FORECASTS ............................................... 3-1  3.1 POPULATION AND DEMOGRAPHIC TRENDS .................................................... 3-1  3.1.1 Historical Population and Demographics .................................................... 3-1  3.1.2 Population and Demographic Forecasts..................................................... 3-2  3.2 HISTORICAL CONNECTIONS AND WATER USE ................................................ 3-3  3.2.1 Historical Service Connections ................................................................... 3-3  3.2.2 Historical Source Production ...................................................................... 3-4  3.2.3 Historical Water Consumption by User Class ............................................. 3-5  3.2.4 Average Day, Maximum Day, and Peak Hour Demands ............................ 3-9  3.2.4.1 Average Day Demand .................................................................. 3-9  3.2.4.2 Maximum Day Demand ................................................................ 3-9  TABLE OF CONTENTS December 2012 TOC-iii pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Master_TOC.docx 3.2.4.3 Peak Hour Demand ...................................................................... 3-9  3.2.5 Seasonal Variation in Consumption by Customer Class .......................... 3-11  3.3 EQUIVALENT RESIDENTIAL UNITS .................................................................. 3-14  3.4 OTHER AUTHORIZED CONSUMPTION ............................................................. 3-15  3.5 UNACCOUNTED-FOR WATER ........................................................................... 3-15  3.6 ZONING DESIGNATIONS ................................................................................... 3-19  3.7 PROJECTED NUMBER OF CONNECTIONS ...................................................... 3-20  3.8 PROJECTED WATER DEMAND AND ERUs ...................................................... 3-22  3.8.1 Projected Equivalent Residential Units ..................................................... 3-23  3.8.2 Projected Average and Maximum Day Demands ..................................... 3-25  3.8.3 Potential Range in Future Water Demand ................................................ 3-28  3.8.4 Projected Range of Demands with Additional Conservation .................... 3-29  CHAPTER 4 ....................................................................................................................... 4-1  WATER USE EFFICIENCY AND CONSERVATION PLAN .............................................. 4-1  4.1 PLANNING REQUIREMENTS ............................................................................... 4-1  4.1.1 Data Collection ........................................................................................... 4-1  4.1.2 Demand Forecast ....................................................................................... 4-2  4.2 DISTRIBUTION SYSTEM LEAKAGE ..................................................................... 4-2  4.3 METERING ............................................................................................................. 4-5  4.4 CONSERVATION PLANNING ............................................................................... 4-5  4.4.1 Historic Conservation Program ................................................................... 4-8  4.4.1.1 Consumption History .................................................................... 4-8  4.4.2 Current Conservation Program ................................................................. 4-13  4.4.2.1 Municipal Water Law .................................................................. 4-13  4.4.2.2 Mandatory Measures .................................................................. 4-14  4.4.3 Proposed Conservation Program ............................................................. 4-15  4.4.3.1 Selected Measures ..................................................................... 4-15  4.4.3.2 Regional Conservation Participation .......................................... 4-16  CHAPTER 5 ....................................................................................................................... 5-1  POLICIES, CRITERIA AND STANDARDS ....................................................................... 5-1  5.1 INTRODUCTION .................................................................................................... 5-1  5.2 SERVICE AREA, POLICIES, AND STANDARDS .................................................. 5-1  5.3 SUMMARY OF POLICIES FOR WATER SYSTEM PLAN ..................................... 5-2  5.3.1 Service Area ............................................................................................... 5-2  5.3.1.1 Mission Statement ........................................................................ 5-2  5.3.1.2 Service Availability ........................................................................ 5-2  5.3.1.3 Government Consistency ............................................................. 5-2  5.3.1.4 Existing Water Service Area and Retail Water Service Area ....... 5-3  5.3.1.5 Future Retail Water Service Area ................................................. 5-3  5.3.1.6 Urban Growth Area ....................................................................... 5-3  5.3.1.7 Satellite/Remote Systems ............................................................ 5-3  5.3.1.8 Service for Annexations without Existing Municipal Water Supplies ........................................................................................ 5-3  5.3.1.9 Service for Annexations with Existing Municipal Water Supplies ........................................................................................ 5-4  TABLE OF CONTENTS December 2012 TOC-iv pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Master_TOC.docx 5.3.1.10 Service for Protection of Public Health ......................................... 5-4  5.3.1.11 Conditions for Service to Properties with Existing Private and or Exempt Wells ........................................................................... 5-4  5.3.1.12 Requests for Assumption by Water Districts or Private Water Systems ........................................................................................ 5-5  5.3.1.13 City Initiated Assumption of Water Districts or Private Water Systems ........................................................................................ 5-5  5.3.1.14 Wholesaling Water ....................................................................... 5-5  5.3.1.15 Wheeling Water ............................................................................ 5-5  5.3.1.16 Water Service to Properties in King County and within Renton Retail Water Service Area ............................................................ 5-6  5.3.2 Water Supply Planning and Management Policies ..................................... 5-6  5.3.2.1 Water Supply Planning ................................................................. 5-6  5.3.2.2 Regional Water Supply Planning .................................................. 5-7  5.3.2.3 Water Supply and Resources Management ................................. 5-7  5.3.2.4 Reclaimed Water Use ................................................................... 5-8  5.3.2.5 Conservation and Water Use Efficiency ....................................... 5-8  5.3.2.6 Water Shortage Response Plan ................................................... 5-8  5.3.2.7 Emergency Interties ...................................................................... 5-9  5.3.2.8 Water Quality ................................................................................ 5-9  5.3.2.9 Cross Connection Control ............................................................ 5-9  5.3.2.10 Wellhead Protection Program ....................................................... 5-9  5.3.2.11 Aquifer Protection Program .......................................................... 5-9  5.3.3 Water Main Extension And Service Ownership ........................................ 5-10  5.3.3.1 Orderly Extension of Utilities ...................................................... 5-10  5.3.3.2 Extension Across Full Frontage of Properties ............................ 5-10  5.3.3.3 Sizing of Water Mains ................................................................. 5-10  5.3.3.4 Requirements for Looping of Water Mains ................................. 5-11  5.3.3.5 Design of Water Main Extension ................................................ 5-11  5.3.3.6 Construction of Water Main Extension ....................................... 5-11  5.3.3.7 Oversizing of Water Main Extension .......................................... 5-11  5.3.3.8 Water Main Extension - Exception ............................................. 5-12  5.3.3.9 Water Service and Water Meter Ownership/Responsibility ........ 5-12  5.3.3.10 Requirement for Water Meters ................................................... 5-12  5.3.3.11 Water Main Extension by Developers ........................................ 5-12  5.3.3.12 Late-comer Agreements ............................................................. 5-12  5.3.4 System Reliability and Emergency Management Plan ............................. 5-13  5.3.4.1 Service Reliability ....................................................................... 5-13  5.3.4.2 Emergency Preparedness .......................................................... 5-13  5.3.4.3 Vulnerability Assessment ........................................................... 5-13  5.3.4.4 Multiple Sources of Supply ......................................................... 5-14  5.3.5 Fire Protection Policies ............................................................................. 5-14  5.3.5.1 Fire Protection Responsibility ..................................................... 5-14  5.3.5.2 Fire Flow Requirements for New Construction ........................... 5-14  5.3.5.3 Fire Flow Requirements for Existing Construction ..................... 5-14  5.3.5.4 Fire Flow Quantity ...................................................................... 5-15  5.3.5.5 Fire Flow Storage ....................................................................... 5-15  5.3.5.6 Fire Hydrants .............................................................................. 5-15  5.3.6 Financial Policies ...................................................................................... 5-15  5.3.6.1 Fiscal Stewardship ..................................................................... 5-15  5.3.6.2 Enterprise Fund – Self-sufficient Funding .................................. 5-15  TABLE OF CONTENTS December 2012 TOC-v pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Master_TOC.docx 5.3.6.3 Rate Stabilization ........................................................................ 5-16  5.3.6.4 Operating Reserve ..................................................................... 5-16  5.3.6.5 Debt Service ............................................................................... 5-16  5.3.6.6 Bonds vs. Cash Expenditures: ................................................... 5-16  5.3.6.7 Comprehensive Planning ........................................................... 5-16  5.3.6.8 Equitable Rates .......................................................................... 5-16  5.3.6.9 Outside-City Rates ..................................................................... 5-17  5.3.6.10 Discounted Rates ....................................................................... 5-17  5.3.6.11 Other Fees and Charges ............................................................ 5-17  5.3.6.12 Ancillary Charges ....................................................................... 5-17  5.3.6.13 Inflation Rate .............................................................................. 5-17  5.3.7 Facilities Policies ...................................................................................... 5-18  5.3.7.1 System Pressure ........................................................................ 5-18  5.3.7.2 Velocity ....................................................................................... 5-18  5.3.7.3 Storage ....................................................................................... 5-18  5.3.7.4 Pipelines and Water Services ..................................................... 5-20  5.3.7.5 Booster Pumps ........................................................................... 5-21  5.3.7.6 Pressure Reducing Stations (PRV’s) .......................................... 5-21  5.3.7.7 Supervisor Control and Data Acquisition (SCADA) Telemetry System ........................................................................................ 5-22  5.3.7.8 Construction Standards .............................................................. 5-22  5.3.7.9 Standard Useful Life for Design .................................................. 5-22  5.3.7.10 Facilities Maintenance ................................................................ 5-23  5.3.7.11 Joint Use Facilities ...................................................................... 5-23  5.3.8 Organizational Policies ............................................................................. 5-23  5.3.8.1 Structure ..................................................................................... 5-23  5.3.8.2 Project Review Procedures ........................................................ 5-24  5.3.8.3 Requirements for Outside Parties .............................................. 5-25  CHAPTER 6 ....................................................................................................................... 6-1  WATER SUPPLY, WATER RIGHTS, AND WATER QUALITY ........................................ 6-1  6.1 WATER SUPPLY RESOURCES ............................................................................ 6-1  6.1.1 Cedar Valley Aquifer ................................................................................... 6-2  6.1.1.1 Downtown Wells ........................................................................... 6-2  6.1.2 Springbrook Springs ................................................................................... 6-2  6.1.3 Maplewood Production Aquifer ................................................................... 6-3  6.1.3.1 Maplewood Wells ......................................................................... 6-3  6.1.4 Well 5A ....................................................................................................... 6-3  6.2 CONDITION OF SUPPLY SOURCES ................................................................... 6-4  6.3 CAPACITY OF SUPPLY SOURCES ...................................................................... 6-4  6.4 WATER RIGHTS .................................................................................................... 6-5  6.4.1 Existing Water Rights ................................................................................. 6-5  6.4.2 Forecasted Water Rights ............................................................................ 6-8  6.5 INTERTIES ........................................................................................................... 6-11  6.6 WATER QUALITY PLAN AND TREATMENT ...................................................... 6-11  6.6.1 Existing Water Quality .............................................................................. 6-12  6.6.2 Treatment ................................................................................................. 6-12  6.6.3 Water Quality Monitoring .......................................................................... 6-13  6.6.4 Corrosion Control Program ....................................................................... 6-16  TABLE OF CONTENTS December 2012 TOC-vi pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Master_TOC.docx 6.7 STATE AND FEDERAL REGULATORY REQUIREMENTS ................................ 6-17  6.7.1 Total Coliform Rule ................................................................................... 6-17  6.7.2 Stage 1 & 2 Disinfectants and Disinfection Byproducts Rules.................. 6-18  6.7.3 Ground Water Rule ................................................................................... 6-20  6.7.4 Radionuclides Rule ................................................................................... 6-20  6.7.5 Inorganic Chemical Analysis..................................................................... 6-21  6.7.6 Organic Chemical Analysis ....................................................................... 6-21  6.7.7 Lead and Copper ...................................................................................... 6-22  6.7.8 Future Regulations ................................................................................... 6-22  6.8 WELLHEAD PROTECTION PROGRAM .............................................................. 6-22  6.9 SYSTEM RELIABILITY ........................................................................................ 6-23  6.9.1 Reliability Efforts ....................................................................................... 6-23  6.9.2 Water Shortage Response Planning ........................................................ 6-24  6.10 LONG-RANGE WATER SUPPLY PLANNING ..................................................... 6-24  6.10.1 Regional Water Supply Issues.................................................................. 6-25  6.11 RECOMMENDED WATER SUPPLY IMPROVEMENTS ..................................... 6-27  CHAPTER 7 ....................................................................................................................... 7-1  SYSTEM ANALYSIS ......................................................................................................... 7-1  7.1 INTRODUCTION .................................................................................................... 7-1  7.2 OPERATIONAL AREAS ......................................................................................... 7-1  7.3 PUMP STATION ANALYSIS .................................................................................. 7-4  7.3.1 Existing System .......................................................................................... 7-4  7.3.1.1 Valley ............................................................................................ 7-4  7.3.1.2 West Hill 495 ................................................................................ 7-4  7.3.1.3 Highlands 435 ............................................................................... 7-6  7.3.1.4 Highlands 565 ............................................................................... 7-7  7.3.1.5 Rolling Hills 590 ............................................................................ 7-8  7.3.1.6 Rolling Hills 490 ............................................................................ 7-9  7.3.1.7 Talbot Hill 350 ............................................................................... 7-9  7.3.2 System Recommendations ....................................................................... 7-11  7.4 STORAGE ANALYSIS ......................................................................................... 7-11  7.4.1 Elements of Storage ................................................................................. 7-11  7.4.1.1 Operational Storage ................................................................... 7-11  7.4.1.2 Equalizing Storage ..................................................................... 7-14  7.4.1.3 Emergency Storage / Fire Storage ............................................. 7-16  7.4.1.4 Dead Storage Volume ................................................................ 7-18  7.4.2 Storage Analysis per Operational Area .................................................... 7-19  7.4.2.1 Valley Operational Area .............................................................. 7-19  7.4.2.2 West Hill 495 Operational Area .................................................. 7-20  7.4.2.3 Highlands 435 Operational Area ................................................ 7-21  7.4.2.4 Highlands 565 Operational Area ................................................ 7-22  7.4.2.5 Rolling Hills 590 Operational Area .............................................. 7-22  7.4.2.6 Rolling Hills 490 Operational Area .............................................. 7-23  7.4.2.7 Talbot Hill 350 ............................................................................. 7-24  7.4.3 Storage Recommendations ...................................................................... 7-24  7.4.4 2017 Improvements .................................................................................. 7-25  7.4.5 2031 Improvements .................................................................................. 7-25  7.5 DISTRIBUTION SYSTEM ANALYSIS .................................................................. 7-25  TABLE OF CONTENTS December 2012 TOC-vii pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Master_TOC.docx 7.5.1 Evaluation Criteria .................................................................................... 7-26  7.5.1.1 Fire Test Model Criteria .............................................................. 7-26  7.5.2 Pressure Analysis ..................................................................................... 7-31  7.5.3 Fire Flow Analysis..................................................................................... 7-31  7.5.4 Recommended Improvements .................................................................. 7-40  7.5.4.1 Pressure Zone Improvements .................................................... 7-40  7.5.4.2 Fire Flow Improvements ............................................................. 7-46  7.5.5 Annual Pipeline Replacement Program .................................................... 7-48  7.6 SUMMARY OF RECOMMENDATIONS ............................................................... 7-54  7.6.1 2017 Improvements .................................................................................. 7-54  7.6.2 2031 Improvements .................................................................................. 7-55  CHAPTER 8 ....................................................................................................................... 8-1  OPERATIONS AND MAINTENANCE ............................................................................... 8-1  8.1 WATER SYSTEM MANAGEMENT ........................................................................ 8-1  8.1.1 Normal Day-to-Day Operations .................................................................. 8-1  8.1.2 Preventive Maintenance ............................................................................. 8-1  8.1.3 Field Engineering ........................................................................................ 8-1  8.1.4 Water Quality Monitoring ............................................................................ 8-2  8.1.5 Emergency Response ................................................................................ 8-2  8.1.6 Cross Connection Control Plan .................................................................. 8-2  8.1.7 Capital Improvement Program .................................................................... 8-3  8.1.8 Budget Formulation .................................................................................... 8-3  8.1.9 Response to Complaints............................................................................. 8-3  8.1.10 Public and Press Contact ........................................................................... 8-4  8.1.11 Billing .......................................................................................................... 8-4  8.2 OPERATOR CERTIFICATION ............................................................................... 8-4  8.3 SYSTEM OPERATION ........................................................................................... 8-6  8.3.1 Identification of Major System Components ............................................... 8-6  8.3.2 Routine System Operation .......................................................................... 8-6  8.3.3 Preventive Maintenance Program .............................................................. 8-7  8.3.4 Equipment, Supplies, and Chemical Listing ............................................... 8-7  8.4 EMERGENCY RESPONSE PROGRAM ................................................................ 8-7  8.4.1 Water System Personnel Emergency Call-up List ...................................... 8-7  8.4.2 Notification Procedures – Water Quality Emergencies ............................... 8-8  8.4.3 Vulnerability Analysis .................................................................................. 8-8  8.4.4 Contingency Operational Plan .................................................................... 8-8  8.5 SAFETY PROCEDURES ....................................................................................... 8-9  8.6 CUSTOMER COMPLAINT RESPONSE PROGRAM ............................................. 8-9  8.7 RECORD KEEPING AND REPORTING ................................................................ 8-9  CHAPTER 9 ....................................................................................................................... 9-1  CAPITAL IMPROVEMENT PLAN ..................................................................................... 9-1  9.1 INTRODUCTION .................................................................................................... 9-1  9.2 CAPITAL PROJECTS ............................................................................................ 9-1  9.2.1 Projects to Address Future Water Supply Needs and Increase Storage Capacity .......................................................................................... 9-1  TABLE OF CONTENTS December 2012 TOC-viii pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Master_TOC.docx 9.2.1.1 50-Year Water Supply Purveyor Contract with Seattle Public Utilities .......................................................................................... 9-1  9.2.1.2 Future Reservoirs to Increase Storage and for Operational Flexibility ....................................................................................... 9-2  9.2.2 Projects to Increase Water System Reliability and Redundancy ................ 9-4  9.2.2.1 Back-Up Power to Pump Stations and Production Wells Pumps .......................................................................................... 9-4  9.2.3 Water Quality Improvements and Regulatory Compliance Projects ........... 9-5  9.2.3.1 Primary Disinfection for Wells PW-8, PW-9, EW-3 and Springbrook Springs ..................................................................... 9-5  9.2.3.2 Well 5A Water Treatment Improvements ..................................... 9-6  9.2.4 Transmission and Distribution Pipelines Renewal and Replacement Projects ........................................................................................... 9-6  9.2.4.1 Asset Management Plan for Renewal and Replacement of Water Mains ................................................................................. 9-6  9.2.4.2 Water Main Replacement Projects to Increase Fire Flow Capacity ........................................................................................ 9-6  9.2.4.3 Annual Water Main Replacement Program .................................. 9-7  9.2.4.4 Optimization of Pressure Zones in Distribution System ............... 9-7  9.2.4.5 Water Main Replacement in conjunction with Roadway Improvements Projects ................................................................. 9-8  9.2.4.6 Rainier Avenue S. from S. Grady Way to S. 2nd St ..................... 9-8  9.2.4.7 SW 27th St - Strander Boulevard Water Main Extension ............. 9-8  9.2.4.8 Water Main Improvements in Redevelopment Areas ................... 9-8  9.2.4.9 Other On-Going Capital Programs and Plans .............................. 9-9  9.3 SUMMARY ............................................................................................................. 9-9  CHAPTER 10 ................................................................................................................... 10-1  FINANCIAL PROGRAM .................................................................................................. 10-1  10.1 INTRODUCTION .................................................................................................. 10-1  10.2 REVENUES AND FUNDING SOURCES ............................................................. 10-1  10.3 HISTORICAL FINANCIAL PERFORMANCE ....................................................... 10-2  10.4 FINANCIAL OUTLOOK ........................................................................................ 10-3  10.5 FUNDING FOR COMPREHENSIVE PLAN CAPITAL IMPROVEMENTS RECOMMENDATIONS ........................................................................................ 10-7  10.6 WATER RATES .................................................................................................... 10-7  TABLE OF CONTENTS December 2012 TOC-ix pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Master_TOC.docx LIST OF APPENDICES Appendix A SEPA Checklist and DNS Appendix B Agency Comment Letters and Responses Appendix C Adopting Resolution Appendix D Agreements Appendix E Water Rights Documents Appendix F System Maps Appendix G Cross Connection Control Plan Appendix H Drinking Water Quality Monitoring Plan Appendix I Demographic Projection Methodology Appendix J Standard Specifications & Details Appendix K Hydraulic Modeling, Calibration, and Results Appendix L Wellhead Protection Plan Appendix M Water Reclamation Checklist Appendix N Aquifer Monitoring Report Appendix O Water Facilities Inventory Form Appendix P Water Loss Control Action Plan LIST OF TABLES Table ES.1 Historical Average and Maximum Day Demand ...................................... ES-5  Table ES.2  Projected Average and Maximum Day Demands .................................... ES-6  Table ES.3 WUE Mandatory Measures ...................................................................... ES-8 Table ES.4 Short-Term (2012-2017) Water Capital Improvement Program Summary ............................................................................................... ES-11 Table ES.5 Long-Term (2018-2031) Water Capital Improvement Program Summary ..................................................................................................... 12 Table ES.6 Water Utility Fund - Forecasted Revenues, Expenses & Fund Balances by Year ................................................................................. ES-14 Table 2.1 Pressure Zones by Geographical Area ....................................................... 2-2  Table 2.2 Active Supply Sources ................................................................................ 2-5  Table 2.3 All Interties of All Types .............................................................................. 2-9  Table 2.4 Existing Storage Facilities ........................................................................ 2-14  Table 2.5 Booster Pump Stations ............................................................................. 2-16  Table 2.6 Pressure Zones – Minimum and Maximum Service Pressures and Elevations ................................................................................................. 2-23  Table 2.7 Pressure Zones by Operating Area .......................................................... 2-23  Table 2.8 Pressure Reducing Station ....................................................................... 2-26  Table 2.9a Pipe Inventory – Length by Diameter and Zone ....................................... 2-31  Table 2.9b Pipe Inventory – Length by Diameter and Material ................................... 2-31  Table 2.9c Pipe Inventory – Length by Material and Age ........................................... 2-32  Table 2.10 Water Main Replacements Since 2003 .................................................... 2-34 Table 3.1 Historical Demographics ............................................................................. 3-2  Table 3.2 Demographic Projections............................................................................ 3-2  Table 3.3 Historical Service Connections ................................................................... 3-3  Table 3.4 Historical Annual Water Production by Source ........................................... 3-5  Table 3.5 Historical Water Consumption by Customer Class ..................................... 3-7  TABLE OF CONTENTS December 2012 TOC-x pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Master_TOC.docx Table 3.6 Historical Average and Maximum Day Demand ....................................... 3-11  Table 3.7 Seasonal Consumption by Customer Type (2004 - 2009) ........................ 3-14  Table 3.8 Historical Water Consumption per Account by Customer Class ............... 3-16  Table 3.9 Historical Number of ERUs by Customer Class ....................................... 3-17  Table 3.10 Historical Unaccounted-for Water ............................................................. 3-17  Table 3.11 Projected Average Annual Growth Rates by Customer Class .................. 3-22  Table 3.12 Projected Connections by Customer Type ............................................... 3-22  Table 3.13 Projected ERUs by Customer Type .......................................................... 3-23  Table 3.14 Projected Average and Maximum Day Demands ..................................... 3-26  Table 3.15 Projected Range in Future Demand ......................................................... 3-31 Table 4.1 Categories of Data Collection ..................................................................... 4-2  Table 4.2 Distribution System Losses (DSL) .............................................................. 4-3  Table 4.3 Connections by Customer Category – 2010 ............................................... 4-5  Table 4.4 Renton Historical, Current and Proposed Water Conservation Measures .................................................................................................. 4-12  Table 4.5 WUE Mandatory Measures ....................................................................... 4-13  Table 4.6 Changes in Customer Class Rates ........................................................... 4-15  Table 4.7 Saving Water Partnership Conservation Measures and Strategies .......... 4-17 Table 6.1a Existing Water Rights Status ...................................................................... 6-6  Table 6.1b Existing Water Rights Status - Interties ...................................................... 6-7  Table 6.2a Forecasted Water Rights Status ................................................................. 6-9  Table 6.2b Forecasted Intertie Status ........................................................................ 6-10  Table 6.3 Source Treatment Goals and Effectiveness ............................................. 6-14  Table 6.4 Existing and Future Requirements of the Safe Drinking Water Act .......... 6-18 Table 7.1 Operational Areas and Pressure Zones ..................................................... 7-1  Table 7.2 Valley Source Capacity Analysis (Existing) ................................................ 7-5  Table 7.3 West Hill 495 Source Capacity Analysis (Existing) ..................................... 7-6  Table 7.4 Highlands 435 Source Capacity Analysis (Existing) ................................... 7-7  Table 7.5 Highlands 565 Source Capacity Analysis (Existing) ................................... 7-8  Table 7.6 Rolling Hills 590 Source Capacity Analysis (Existing) ................................ 7-9  Table 7.7 Rolling Hills 490 Source Capacity Analysis (Existing) .............................. 7-10  Table 7.8 Talbot 350 Source Capacity Analysis (Existing) ....................................... 7-10  Table 7.9 Operational Storage Volumes ................................................................... 7-12  Table 7.10 Diurnal Summer Demand by Operating Area(1) ........................................ 7-14  Table 7.11 Equalizing Storage Volumes..................................................................... 7-16  Table 7.12 Emergency Storage Volumes ................................................................... 7-17  Table 7.13 Maximum Fire Flows ................................................................................. 7-18  Table 7.14 Nested Fire and Emergency Volume ........................................................ 7-18  Table 7.15 Reservoir Dead Volume ............................................................................ 7-19  Table 7.16 Valley Storage Analysis (Existing) ............................................................ 7-20  Table 7.17 West Hill 495 Storage Analysis (Existing) ................................................. 7-21  Table 7.18 Highlands 435 Storage Analysis (Existing) ............................................... 7-21  Table 7.19 Highlands 565 Storage Analysis (Existing) ............................................... 7-22  Table 7.20 Rolling Hills 590 Storage Analysis (Existing) ............................................ 7-23  Table 7.21 Rolling Hills 490 Storage Analysis (Existing) ............................................ 7-23  Table 7.22 Talbot Hill 350 Storage Analysis (Existing) ............................................... 7-24  Table 7.23  Service Criteria for Required Fire Flow .................................................... 7-26  Table 7.24 Large Fire Requirements .......................................................................... 7-29  TABLE OF CONTENTS December 2012 TOC-xi pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Master_TOC.docx Table 7.25 System Fire Flows .................................................................................... 7-38  Table 7.26 New Pipes and Recommended Pipe Replacement for Fire Flow ............. 7-46  Table 7.27 Useful Life of Pipes ................................................................................... 7-50  Table 7.28 Pipe Length by Decade Installed and Material Type ................................ 7-51 Table 8.1 Staff Certification ........................................................................................ 8-5  Table 8.2 Operations & Maintenance Activities – Typical Year ................................ 8-11  Table 8.3 Water Maintenance Services Equipment List 2011 .................................. 8-15 Table 10.1 Water Utility Fund (Fund 405) ................................................................... 10-2  Table 10.2 Water Utility Fund (Fund 405) ................................................................... 10-5  Table 10.3 2012 City of Renton Water Commodity Rate Schedule ............................ 10-7  Table 10.4 2012 City of Renton Monthly Water Base Charge Rate Schedule ........... 10-8  LIST OF FIGURES Figure ES.1 Service Area ............................................................................................ ES-2  Figure ES.2 Water Facility Locations .......................................................................... ES-4 Figure 1.1 Adjacent Purveyors ..................................................................................... 1-4  Figure 1.2 City of Renton Drinking Water Organization ............................................... 1-5  Figure 1.3 Service Area ............................................................................................... 1-6 Figure 2.1 Water Facility Locations ............................................................................. 2-3  Figure 2.2 Hydraulic Profile Schematic ...................................................................... 2-24 Figure 3.1 Average Water Production by Source (2004 to 2009) ................................ 3-6  Figure 3.2 Water Consumption Percentage by Customer Class (2004 to 2009) ......... 3-8  Figure 3.3 Historical Annual Water Consumed .......................................................... 3-10  Figure 3.4 Average Monthly Consumption, Including Wholesale (2004 to 2009) ...... 3-12  Figure 3.5 Average Seasonal Consumption by Customer Class (2004 to 2009) ...... 3-13  Figure 3.6 Historical Annual Water Production vs. Consumption .............................. 3-18  Figure 3.7 Renton Zoning Map .................................................................................. 3-21  Figure 3.8 Projected Number of ERUs ...................................................................... 3-24  Figure 3.9 Projected Average and Maximum Day Demand ....................................... 3-27  Figure 3.10 Potential Range in Future Demand Projections ........................................ 3-30 Figure 4.1 DSL 3-Year Rolling Average ....................................................................... 4-4  Figure 4.2 Water Use by Customer Category - 2010 ................................................... 4-6  Figure 4.3 Monthly Water Production 2010 ................................................................. 4-7  Figure 4.4 Average Annual Consumption Single-Family Connection .......................... 4-9  Figure 4.5 Total Consumption.................................................................................... 4-10  Figure 4.6 Annual Consumption per Connection ....................................................... 4-11 Figure 7.1  Water Facility Locations ............................................................................. 7-2  Figure 7.2  Hydraulic Profile Schematic ........................................................................ 7-3  Figure 7.3  Five Types of Storage Required ............................................................... 7-13  Figure 7.4  Fire Flow Requirements ............................................................................ 7-27  Figure 7.5  Large Fire Locations ................................................................................. 7-28  Figure 7.6  Nodes With High and Low Pressure 2017 ................................................ 7-32  TABLE OF CONTENTS December 2012 TOC-xii pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Master_TOC.docx Figure 7.7  Nodes With High and Low Pressure 2031 ................................................ 7-33  Figure 7.8  2017 1000-gpm Fire Deficiency ................................................................ 7-34  Figure 7.9  2017 3000-gpm Fire Deficiency ................................................................ 7-35  Figure 7.10  2031 1000-gpm Fire Deficiency ................................................................ 7-36  Figure 7.11  2031 3000-gpm Fire Deficiency ................................................................ 7-37  Figure 7.12 Areas of Improvement .............................................................................. 7-41  Figure 7.13  Area 1 – Kennydale 320/Highlands 435 Rezone Study ............................ 7-42  Figure 7.14  Area 2 – Rolling Hills Rezone Study ......................................................... 7-43  Figure 7.15  Area 3 – Talbot Hill Rezone Study ............................................................ 7-44  Figure 7.16  Area 4 – West Hills Rezone Study ............................................................ 7-45  Figure 7.17  Recommended Replacement for Fire ....................................................... 7-49  Figure 7.18 Pipes Reaching End of Useful Life ........................................................... 7-52  Figure 7.19 Map of Pipes Reaching End of Useful Life ............................................... 7-53  ACRONYMS & ABBREVIATIONS December 2012 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Acronyms.docx AC Asbestos Cement accnt Account ADD Average Day Demand AF Acre-Feet AFY Acre-Feet per Year AMP Asset Management Program AMR Automatic Meter Read AWWA American Water Works Association BPS Booster Pump Station ccf Hundred Cubic Feet CIP Capital Improvement Plan CIP Cast Iron Pipe City City of Renton cf Cubic Feet Council City Council CPI-U Consumer Price Index CT Contact Time CT6 Chlorine Contact time of Six Minutes CWA Cascade Water Alliance D/DBPR Disinfectants / Disinfection Byproducts Rule DIP Ductile Iron Pipe DNS Determination of Non-significance DOE Department of Ecology ACRONYMS & ABBREVIATIONS December 2012 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Acronyms.docx DOH Washington State Department of Health DSL Distribution System Leakage EAM Enterprise Asset Management Ecology Washington State Department of Ecology EIS Environmental Impact Statement EPA U.S. Environmental Protection Agency EPS Extended Period Simulation ERU Equivalent Residential Units FAZ Forecast Analysis Zone fps feet per second ft. Foot/feet gal Gallon Galv Galvanized Steel Pipe GIS Geographic Information System GMA Growth Management Act gpd Gallons per Day gpm Gallons per Minute HDPE High Density Polyurethane Pipe HGL Hydraulic Grade Line HMI Human Machine Interface in. Inches IOC Inorganic Chemicals ISO Insurance Service Office ACRONYMS & ABBREVIATIONS December 2012 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Acronyms.docx LF Linear Feet MDD Maximum Day Demand MG Million Gallon mgd Million Gallons per Day mg/day/ft Million Gallons per Day per Foot mg/L Milligrams per Liter MS Microsoft MTU Master Telemetry Unit MWL Municipal Water Law MWS Municipal water suppliers O & M Operations and Maintenance PCE Tetrachloroethylene pH A measure of the acidity or alkalinity of a solution PHD Peak Hour Demand Plan Water System Plan Update PLC Programmable Logic Controller PRV Pressure Reducing Valve psi Pounds per square inch PSRC Puget Sound Regional Council PVC Polyvinyl-Chloride Pipe PWTF Public Works Trust Fund Qa Annual withdrawal volume Qi Instantaneous Flow Rate ACRONYMS & ABBREVIATIONS December 2012 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Acronyms.docx RCW Revised Code of Washington RETS Renton Effluent Transfer System RTU Remote Telemetry Unit RUL Remaining Useful Life RWSA Retail Water Service Area SCADA Supervisory Control and Data Acquisition SDWA Safe Drinking Water Act SEPA State Environmental Policy Act SOC Synthetic Organic Chemical Spring Springbrook Springs SPU Seattle Public Utilities SRSS Seattle Regional Supply System ST Steel Pipe SWP Saving Water Partnership TAZ Traffic Analysis Zones TCR Total Coliform Rule UCMR 3 Unregulated Contaminant Monitoring Rule 3 UGA Urban Growth Area VOC Volatile Organic Chemical WAC Washington Administrative Code WLCAP Water Loss Control Action Plan WUE Water Use Efficiency WWTP Wastewater Treatment Plant December 2012 ES-1 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/ES.docx WATER SYSTEM PLAN UPDATE EXECUTIVE SUMMARY This Water System Plan Update (Plan) has been developed in accordance with Chapter 246- 290 of the Washington Administrative Code (WAC), as presented in the Washington State Department of Health (DOH) regulations for Group A Public Water Systems. This plan is primarily an update to the City of Renton’s (City’s) 2005 Plan. The City of Renton water system identification number is 71850 L. The purpose of this Plan is to develop a long-term planning strategy for the City’s water service area. Updated every six years, the Plan evaluates the existing system and its ability to meet the anticipated requirements for water source, quality, transmission, storage, and distribution over a twenty-year planning period. Water system improvement projects have been developed to meet the changing demands of regulatory impacts, and population growth, as well as infrastructure repair and replacement. The Plan also identifies planning level costs of the improvement projects and provides a financial plan for funding the projects. A State Environmental Policy Act (SEPA) Checklist and determination of non-significance (DNS) has been prepared for this Plan. The City anticipates this Plan does not have probable significant adverse impacts on the environment in accordance with the DNS under WAC 197- 11-340(2). The SEPA Checklist and DNS are included in Appendix A. This Plan is required to meet state, county, and local requirements. The City will submit this plan to the DOH, the Department of Ecology (DOE), King County, adjacent utilities, and local governments as part of the Agency Review process. See Appendix B for the Comment Letters. The Adopting Resolution will be included in Appendix C, upon Plan approval by the City Council. ES.1 INTRODUCTION The City is located within King County at the southeastern end of Lake Washington. Its water system provides service to an area of approximately 16 square miles that is largely coincident with the city limits. The water distribution system serves the valley floors and parts of five surrounding hills: West Hill, the Highlands, Scenic Hill (also known as Renton Hill), Talbot Hill, and Rolling Hills. The City currently serves customers within an elevation range of 11 feet to 476 feet. The City’s water system provides service to a full-time residential population of approximately 54,000, approximately 20,000 temporary and transient users, and approximately 28,000 regular non-residential users. In addition, the City supplies water on a wholesale basis to Skyway Water and Sewer District through a single metered connection. The City’s retail water service area (RWSA) is bordered by nine adjacent water systems. It is unlikely that Renton’s RWSA will change much in the future due to the geography of the surrounding areas and the fact that all of the surrounding areas are currently served by other water purveyors. The only possible change to the City’s RWSA boundaries in the future is an adjustment to the boundaries to include the area “Future Retail Water Service” shown in Figure ES.1. Copies of service area agreements between the City and the adjacent water purveyors are included in Appendix D and summarized in Chapter 1. !"`$ %&e( !"b$ ?è ?ç ?Å ?æ ?í ?æ SE May Valley Rd SE 128th St SE 192nd St 148th Ave SE 196th Ave SE Re nton Ave S 140th Ave SE 108th A ve Talbot Rd S E Valley Rd SE 176th St SE Petrovitsky Rd Edmonds Ave NE SW 43rd St Interurb an A v e S B e acon Ave S F r o n t St S 184th Ave SE 84th Ave S Duvall Ave NE S Bangor St 164th Ave SE 132nd Ave SE S 178th St SE 200th St S 12 8 th St 96th Ave S S W G ra d y W ay N 30th St Park Ave N SE 72nd St SE 164th St 116th Ave SE SE 208th St Cedar Grove Rd SE SE Jones Rd E M ercer W ay Southcenter Blvd Orillia Rd S SE May Valley R d La k e W a s h i n g t o n La k e Yo u n g s Ce d a r R i v e r La k e De s i r e Sp r i n g La k e La k e Ka t h l e e n Pa n t h e r La k e Sh a d y La k e La k e B o r e n Figure ES.1 Service Area Water System Plan Update City of Renton04,5009,000FeetOLegendRoadsRetail Water Service Area Future Retail Water Service Area City Limits Urban Growth Boundary Waterbody December 2012 ES-3 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/ES.docx ES.2 EXISTING SYSTEM The City owns and operates a multi-source municipal water system, which includes supply, treatment, storage, and distribution of potable water to residential, commercial, industrial, and wholesale customers. The City’s water distribution system consists of more than 1.6 million feet of pipeline. The water system facilities are shown in plan view in Figure ES.2. Chapter 2 provides a description of each facility and any major changes since the last plan update. Water supply sources include five wells (RW-1, RW-2, RW-3, PW-8, and PW-9) and one spring (Springbrook Springs) that are used for normal supply. The City continues to gather data for the Maplewood well field (Wells PW-11, PW-12, and PW-17) for the purpose of obtaining perfected water right certificates for the wells. In addition, the City is a wholesale customer of Seattle Public Utility (SPU). The City has six metered interties with the SPU transmission mains. As a result of Renton’s topography and geography, the City has 15 hydraulically distinct pressure zones. Pumping throughout the water system is accomplished by nine online booster pump stations (BPS) and two standby BPS that are located throughout the City. Currently there are ten reservoirs in the system, strategically located to provide adequate equalizing and fire flow reserves for all pressure zones. Pressure reducing valves (PRVs) are used to supply lower pressure zones from higher pressure zones that contain water storage reservoirs. The City has ten interties and three additional emergency interties. kj kj TT #* kj kj +C kj kj #* kj +Ckj#*#* #* kjkj+C kj #*#* #* #* #* #*#* #* #*#* #*kj kj kj kj kj kj kj kj kjkj kj +C +C +C )I )I )I )I )I )I )I )I )I )I )I )I )I )I %&e(?è ?ç ?Å ?æ?í SE 128th St SE 192nd St 148th Ave SE S 212th St 140th Ave SE 108th Ave Talbot Rd S E Valley Rd SE 176th St Edmonds Ave NE SW 43rd St 84th Ave S Duvall Ave NES Bangor St 132nd Ave SE S 128th St 96th Ave S S W Grad y Wa y N 30th St Park Ave NSE 72nd St SE 164th St 116th Ave SE SE 208th St E M ercer W ay SE May Valley Rd Maplewood BPS West Hill BPS HighlandsBPS HazenReservoir Houser Way BPS Fred Nelson BPS PW-8 PW-9 EW-3 North Talbot BPS South Talbot BPS Tiffany Park BPS PW-12 PW-11 PW-17 Rolling Hills BPS Monroe Avenue BPS PW-5A Mt Olivet Reservoir West Hill Reservoir South Talbot Reservoir North Talbot Reservoir RW-1, 2 & 3 Springbrook Springs Upper & Lower Gallery Springbrook Springs Treatment Plant HighlandsChlorinationFacilityHighlands1.5 & 2.0MG 435Reservoirs Rolling Hills Reservoirs 494 & 594 Highlands0.75 MG565 Reservoir Maplewood Chlorination Facility Maplewood Clearwell Lake Washington Cedar River Green River Panther Lake Lake Boren Black River Forbay May Creek Lake Youngs Green River Springbrook Creek Kent Intertie SWD Station #36 SWD Station #39 SWD Station #37 SWD Station #34 SWD Station #33 SWD Station #38 SkywayWholesale Tukwila Intertie Boeing CSTC Fire Coal Creek IntertieWD 90/Renton Intertie Renton/Seattle Intertie Boeing Plant Meter - East and West Figure ES.2 Water Facility Locations Water System Plan Update City of Renton 02,0004,000 Feet OLegend +C Treatment Plant kj Reservoir #*Well T Spring Pump Station PRV )I Interties Water Distribution System 8" and Smaller 10 - 16" 18" and Larger Roads Waterbody Retail Water Service Area Pressure Zones Valley 196 West Hill 495 Earlington 370 West Hill 300 Highlands 435 Kennydale 320 Kennydale 218 Highlands 565 Rolling Hills 490 Scenic Hill 370 East Talbot Hill 300 Rolling Hills 590 Rolling Hills 395 Talbot Hill 350 West Talbot Hill 300 Talbot Hill 270 December 2012 ES-5 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/ES.docx ES.3 PLANNING DATA AND WATER DEMAND FORECASTS Quantifying realistic future water demand is necessary for planning infrastructure projects and securing adequate water supply to meet future needs. The City’s future water demand is estimated for the RWSA based on current use and anticipated growth within the RWSA, utilizing data provided in the Puget Sound Regional Council’s (PSRC’s) Population, Households, and Employment Forecast database. Chapter 3 summarizes the current and projected demographics; Appendix J provides a detailed description of the methodology used for the projections. In general, there is very little vacant land within the City’s current RWSA. Therefore, the growth capacity within the City’s RWSA is limited. The majority of future growth is projected to occur within the Regional Urban Center and the Sunset Area Community Planned Action redevelopment boundaries. The City’s historical production data was used to calculate the Average Day Demand (ADD) and Maximum Day Demand (MDD) for each year from 2004 to 2009, as displayed in Table ES.1. This data was used to determine that the average MDD/ADD peaking factor is 1.83. Table ES.1 Historical Average and Maximum Day Demand Year Annual Production (ccf) Average Day Demand (mgd) Max. Day Demand (mgd) Date of Max. Day Demand Max. Day/Avg. Day Peaking Factor 2004 3,800,274 7.77 14.25 7/23/04 1.83 2005 3,617,002 7.41 13.02 8/12/05 1.76 2006 3,949,575 8.09 15.27 7/24/06 1.89 2007 3,959,812 8.12 14.75 7/11/07 1.82 2008 3,653,382 7.47 12.75 8/16/08 1.71 2009 3,707,785 7.60 14.81 7/29/09 1.95 Average 3,781,305 7.74 14.14 - 1.83 Table ES.2 shows the projected ADD, MDD and equivalent residential units (ERUs) for the City from 2011 to 2071. Historical data from 2004 to 2009 indicate an average ERU water use of 171 gallons per day (gpd) for the City of Renton. Projected ERUs were determined using the growth projections described in Chapter 3. The projected ERUs do not include distribution system leakage, (DSL) miscellaneous water use, or wholesale customer demand. However, ADD and MDD values do include DSL, etc. The ADD and MDD projections were utilized in the system and supply analysis. December 2012 ES-6 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/ES.docx Table ES.2 Projected Average and Maximum Day Demands Year Projected ADD1-4 (mgd) Projected MDD5 (mgd) Projected ERUs 2011 8.15 15.12 36,167 2012 8.29 15.39 36,804 2013 8.43 15.65 37,437 2014 8.56 15.91 38,038 2015 8.70 16.16 38,632 2016 8.82 16.39 39,180 2017 8.94 16.62 39,729 2021 9.43 17.55 41,922 2031 10.58 19.7 47,285 2041 11.44 21.27 51,381 2051 11.93 22.15 53,678 2061 12.41 23.02 55,976 2071 12.88 23.89 58,234 Notes: 1. ADD = Projected ERUs x 171 gpd/ERU + Skyway Wholesale + SPU Water to Boeing + King County WWTP Consumption + Other Authorized Consumption + Unaccounted-for Water. 2. Wholesale demand projections for Skyway from the 2005 Skyway Water and Sewer District Comprehensive Plan - Water and Sewer Systems. 3. Other Authorized Consumption is estimated to be 0.57 percent of the total system demand. 4. Unaccounted-for Water is assumed to be 17.8 percent of total system demand. 5. MDD = 1.83 x ADD (Skyway maximum day to average day peaking factor is 3.34). DSL fluctuated between 15.8 percent and 20.2 percent of the total City production between 2004 and 2009, with an average of 17.8 percent. The demand projections in Table ES.2 assume that unaccounted-for water will continue to account for roughly 17.8 percent of the total City demand through year 2071. Chapter 4 includes a discussion of the actions to be taken by the City to help meet the ten percent leakage goal. Chapter 3 also presents a range of demand projections that was developed to evaluate the impacts of varying build-out growth assumptions, DSL, and impacts of climate change. December 2012 ES-7 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/ES.docx ES.4 WATER USE EFFICIENCY AND CONSERVATION PLAN Chapter 4 presents the City’s Conservation and Water Use Efficiency Plan for the next six years. During this period, the City will join the Saving Water Partnership, which will expand the breadth and depth of the City’s conservation activities. The Water Use Efficiency (WUE) rule, which was introduced by the Washington State Legislature and came into effect in 2007, establishes that all municipal water suppliers must use water more efficiently in exchange for water right certainty and flexibility to help them meet future demand. The four fundamental elements to the WUE program are planning requirements, metering requirements, distribution leakage standard, and conservation planning and goal setting. ES.4.1 Planning Requirements The WUE rule requires the collection of production and consumption data on a regular basis. These are utilized in this planning document to forecast future demand, describe water supply characteristics, to aid in water management decision making, to calculate DSL, evaluate the WUE program, and be submitted to the state in the annual WUE report. ES.4.2 Metering As required by the Municipal Water Law, all the City’s sources of supply, as well as interties and purchases, are metered with production meters. The City also provides service metering for its customers. All large service meters are tested annually and repaired as needed. Small service meters are repaired or replaced on an as-needed basis. ES.4.3 Distribution System Leakage Municipal water suppliers must now meet a 10 percent or less DSL based on a 3-year rolling average to comply with the WUE standard. Because the City’s DSL exceeds 10 percent, a “Water Loss Control Action Plan” was developed (Appendix Q). Implementation of this plan, which began in 2008, establishes compliance with the WUE rule. An additional measure that should contribute to lowering of DSL is the City’s implementation of an automatic meter read (AMR) program. A benefit of the AMR program will be to provide more time for operations and maintenance staff to perform maintenance on small, as well as large meters, on a more regular schedule. ES.4.4 Conservation Plan Current water conservation planning is governed by the WUE Rule. As a municipal water supplier with more than 17,000 connections, the City is required to implement the five mandatory measures and either implement or evaluate the two others. Table ES.3 presents the mandatory measures and the City’s status for compliance. December 2012 ES-8 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/ES.docx Table ES.3 WUE Mandatory Measures Must implement the following WUE measures: Status Install production (source) meters Implemented Install consumption (service) meters Implemented Perform meter calibration Implemented / ongoing Implement a water loss control action plan to control leakage if exceeds 10% Implemented / ongoing Educate customers about water efficiency at least once per year Implemented /ongoing Must evaluate or implement these WUE measures: Evaluate rates that encourage water demand efficiency Implemented Evaluate reclamation Implemented / reviewed Since 1990, conservation programming has included school outreach, a speakers’ bureau, fairs, and promotion of regional programs. The addition of the 12-month water consumption history on water bills was started in 1992. Since 1994, the City of Renton has employed increasingly complex tiered water pricing rates to encourage conservation. Other past and present conservation efforts are explained in Chapter 4. ES.5 POLICIES, CRITERIA, AND STANDARDS The City manages its water utility and water system in accordance with established federal and state regulations for public water systems. City policies and standards described in Chapter 5 provide a consistent framework for the planning, design, construction, maintenance, operation, and service of the City’s water system and water supply sources. The City’s policies are grouped by major categories including:  Service Area.  Water Supply Planning and Management.  Water Main Extension and Service Ownership.  System Reliability and Emergency Management Plan.  Fire Protection.  Financial.  Facilities.  Organization. December 2012 ES-9 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/ES.docx ES.6 WATER SUPPLY, WATER RIGHTS, AND WATER QUALITY Chapter 6 describes the City’s sources of supply, including the condition and capacity of its sources, the water rights associated with its sources, and the water quality requirements for its sources. This chapter also discusses the City’s interties as they are related to its source of supply and provides a summary of Renton’s Wellhead Protection Program. ES.6.1 Water Supply Renton's supply is derived from five water sources: the Cedar Valley Aquifer, Springbrook Springs, the Maplewood Aquifer, the recharge area for Well 5A, and SPU supply interties. For the City's primary supply, it maintains and operates six wells within the Cedar Valley Aquifer and three wells within the Maplewood Aquifer. ES.6.2 Water Rights Renton has developed independent water sources in order to maintain greater control over the management and costs of its water supply. The City has 13 water right certificates and five permits. Copies of the City's water rights certificates and permits are in Appendix E. In issuing recent water rights certificates to the City, DOE has conditioned the permits with a limitation on the total withdrawals by the City of 14,809 acre-feet per year (AFY). The City does not anticipate applying for any new water rights or changes to its existing water rights. The installed pumping equipment has the capacity to deliver the water equal to the peak day requirements of the City’s system through 2025. During the current planning period, the City anticipates that on infrequent occasions the demand will exceed the instantaneous withdrawal water rights of the Cedar River sources and Springbrook Springs. During these periods, the City plans to meet the demand by purchasing wholesale water from SPU. The City estimates that it will begin to exceed its annual water right of 14,809 acre-feet (AF) as soon as 2031 or as late as 2081. ES.6.3 Water Quality The City’s water quality at its supply sources, storage facilities, and within its distribution system satisfactorily meets state and federal requirements on a regular basis. Overall water quality within the system is excellent with only minor aesthetics problems caused by iron, manganese, and hydrogen sulfide. During the last 21 years, the City has upgraded the treatment systems at its Springbrook Springs and all downtown wells. Gaseous chlorine or sodium hypochlorite (Maplewood wells) is added to all of the City's sources for disinfection, and sodium fluoride is also added to prevent dental caries / cavities. Within the next six years, the City plans to provide Wells EW- 3, PW-8 and PW-9, and Springbrook Springs with primary disinfection. The City has implemented a comprehensive and proactive water quality monitoring program. It includes monitoring for operations, regulatory monitoring to meet the requirements of the federal Safe Drinking Water Act, and monitoring to manage the City's aquifers. This program is described in detail in Appendix H of this Plan. The City also has a Wellhead Protection December 2012 ES-10 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/ES.docx Plan, which was approved by DOH in December 1999. An updated Wellhead Protection Plan is included as Appendix L. ES.6.4 Recommended Water Supply Improvements It is recommended that the City maintain and/or renew its existing intertie agreements with adjacent purveyors as well as pursue additional interties in order to improve reliability and supplement future peak demands. System reliability can be further improved by implementing security improvements and considering installation of new PRVs and other control valves when redevelopment occurs. Additional possible projects for improving supply reliability are aquifer recharge and the use of reclaimed water. ES.7 SYSTEM ANALYSIS The City’s water distribution system was evaluated for deficiencies in the storage facilities, pump stations, and pipelines. The system analysis yielded a number of recommended improvements including pump station, reservoir, pipeline, and pressure zone improvements, as summarized in Chapter 7. Projects to address deficiencies found in the year 2017 are of higher priority than those to address deficiencies in the year 2031. ES.8 OPERATIONS AND MAINTENANCE A detailed review of the City’s water system operation and maintenance program was performed. The City’s water system is maintenance-intensive, with its facilities for pumping, water quality control, and emergency power generation. Chapter 8 describes water system management, operator certification, system operation, the emergency response program, safety procedures, the customer complaint response program, and record keeping and reporting. ES.9 CAPITAL IMPROVEMENTS PLAN Chapter 9 summarizes planned and future water system improvement projects and programs that are recommended in other chapters of this Plan and from other feasibility studies for the City. The improvements are necessary to keep the system in compliance with all federal and state regulations as well as to meet future water demand due to population growth within the City’s RWSA. Capital projects are generally categorized into water supply, water quality and treatment, storage facilities, pump stations, water main rehabilitation and replacement, major maintenance, and regulatory compliance programs. Projects identified in the current CIP document are summarized in Tables ES.4 and ES.5. December 2012 ES-11 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/ES.docx December 2012 ES-12 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/ES.docx December 2012 ES-13 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/ES.docx ES.10 FINANCIAL ANALYSIS A summary of the City’s Water Utility financial status and its funding strategy for recommended investments in the CIP for the 10-year planning period through 2020 is provided in Chapter 10. The Water Utility operates as an enterprise fund and as such, it must be self-sustaining. Water utility funds are accounted for and budgeted separately, but are managed as a system with other City’s enterprises funds in accordance with the City’s financial management policies. The City accounts for its water revenues and other funding sources in two main separate funds. Fund 405 is the Operating Fund for the City’s Water Utility. Fund 425 is the Construction Fund for the Water Utility for the design, construction, and project management of capital improvement projects. The Finance Department maintains the financial records for the Water Utility. Table ES.6 presents a projection of annual utility revenues, expenses, and fund balances for the next 10 years (2011-2020). Transfers to the capital improvement fund included in Table ES.6 represent anticipated funding needs for projects in the current (2011-2016) CIP. These funds will be updated to reflect the recommendations cited in this plan for future budget and rate projections. December 2012 ES-14 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/ES.docx Ta b l e E S . 6 W a t e r U t i l i t y F u n d F o r e c a s t e d R e v e nu e s , E x p e n s e s & F u n d B a l a n c e s b y Y e a r 20 1 1 2 0 1 2 2 0 1 3 2 0 1 4 2 0 1 5 2 0 1 6 2 0 1 7 2 0 1 8 2 0 1 9 2 0 2 0 Be g i n n i n g F u n d Ba l a n c e $4 , 6 9 5 , 0 0 0 $ 3 , 8 5 4 , 0 0 0 $ 4 , 2 9 9 , 0 0 0 $ 5 , 01 7 , 0 0 0 $ 5 , 7 0 6 , 0 0 0 $ 6 , 2 2 9 , 0 0 0 $ 1 1 , 6 1 6 , 00 0 $ 1 8 , 0 8 5 , 0 0 0 $ 2 5 , 4 3 6 , 0 0 0 $ 3 4 , 0 1 5 , 0 0 0 An n u a l R e v e n u e s Wa t e r S e r v i c e 2 $1 3 , 3 3 8 , 0 0 0 $ 1 5 , 4 9 5 , 0 0 0 $ 1 6 , 4 4 2 , 0 0 0 $1 7 , 4 9 2 , 0 0 0 $ 1 8 , 6 0 9 , 0 0 0 $ 2 0 , 1 9 0 , 0 0 0 $ 2 1 , 9 0 5 , 00 0 $ 2 3 , 7 6 7 , 0 0 0 $ 2 5 , 7 8 8 , 0 0 0 $ 2 7 , 9 8 2 , 0 0 0 Wa t e r F e e s 3 $1 8 5 , 0 0 0 $ 1 8 6 , 0 0 0 $ 1 8 6 , 0 0 0 $ 1 8 7 , 0 0 0 $ 1 8 8 , 0 0 0 $1 8 9 , 0 0 0 $ 1 9 0 , 0 0 0 $ 1 9 1 , 0 0 0 $ 1 9 2 , 0 0 0 $ 1 9 3 , 0 0 0 In v e s t m e n t I n t e r e s t $1 2 7 , 0 0 0 $ 6 6 , 0 0 0 $ 9 1 , 0 0 0 $ 1 1 1 , 0 0 0 $ 1 3 1 , 0 0 0 $1 9 6 , 0 0 0 $ 3 6 6 , 0 0 0 $ 5 5 6 , 0 0 0 $ 7 7 3 , 0 0 0 $ 1 , 0 4 1 , 0 0 0 In t e r f u n d R e v e n u e 4 $2 7 0 , 0 0 0 $ 2 7 5 , 0 0 0 $ 2 8 7 , 0 0 0 $ 2 9 4 , 0 0 0 $ 2 4 8 , 0 0 0 25 5 , 0 0 0 $ 2 6 2 , 0 0 0 $ 2 6 9 , 0 0 0 $ 2 7 7 , 0 0 0 $ 2 8 5 , 0 0 0 Ot h e r R e v e n u e 5 $1 2 6 , 0 0 0 $ 1 3 0 , 0 0 0 $ 1 3 6 , 0 0 0 $ 1 4 1 , 0 0 0 $ 1 4 7 , 0 0 0 $1 5 2 , 0 0 0 $ 1 5 8 , 0 0 0 $ 1 6 5 , 0 0 0 $ 1 7 1 , 0 0 0 $ 1 7 8 , 0 0 0 Bo n d P r o c e e d s - - - - - $ 2 , 4 2 1 , 0 0 0 $ 2 , 5 1 8 , 0 0 0 $2 , 8 2 0 , 0 0 0 $ 2 , 9 3 3 , 0 0 0 $ 3 , 4 8 6 , 0 0 0 Re v e n u e T o t a l s $1 4 , 0 4 6 , 0 0 0 $ 1 6 , 1 5 1 , 0 0 0 $ 1 7 , 1 4 3 , 0 0 0 $ 1 8 , 22 5 , 0 0 0 $ 1 9 , 3 2 3 , 0 0 0 $ 2 3 , 4 0 3 , 0 0 0 $ 2 5 , 4 0 0 , 00 0 $ 2 7 , 7 6 8 , 0 0 0 $ 3 0 , 1 3 4 , 0 0 0 $ 3 3 , 1 6 5 , 0 0 0 An n u a l E x p e n d i t u r e s Ad m i n i s t r a t i o n $3 1 1 , 0 0 0 $ 3 2 1 , 0 0 0 $ 3 3 1 , 0 0 0 $ 3 4 5 , 0 0 0 $ 3 5 9 , 0 0 0 $3 7 4 , 0 0 0 $ 3 8 9 , 0 0 0 $ 4 0 6 , 0 0 0 $ 4 2 3 , 0 0 0 $ 4 4 1 , 0 0 0 Op e r a t i o n s $8 6 8 , 0 0 0 $ 6 3 5 , 0 0 0 $ 1 , 1 9 8 , 0 0 0 $ 1 , 2 4 6 , 00 0 $ 1 , 2 9 7 , 0 0 0 $ 1 , 3 4 9 , 0 0 0 $ 1 , 4 0 5 , 0 0 0 $1 , 4 6 2 , 0 0 0 $ 1 , 5 2 2 , 0 0 0 $ 1 , 5 8 6 , 0 0 0 Ma i n t e n a n c e $4 , 7 7 1 , 0 0 0 $ 4 , 9 1 3 , 0 0 0 $ 5 , 1 3 2 , 0 0 0 $ 5 , 32 4 , 0 0 0 $ 5 , 5 2 5 , 0 0 0 $ 5 , 7 3 6 , 0 0 0 $ 5 , 9 5 7 , 00 0 $ 6 , 1 8 9 , 0 0 0 $ 6 , 4 3 2 , 0 0 0 $ 6 , 6 8 6 , 0 0 0 Pu r c h a s e d W a t e r & Wa t e r I n v e n t o r y 6 $3 6 7 , 0 0 0 $ 3 0 7 , 0 0 0 $ 3 1 5 , 0 0 0 3 2 4 , 0 0 0 $ 3 3 4 , 0 0 0 $3 4 4 , 0 0 0 $ 3 5 5 , 0 0 0 $ 3 6 5 , 0 0 0 $ 3 7 7 , 0 0 0 $ 3 8 9 , 0 0 0 De b t S e r v i c e s C o s t s 7 $2 , 4 8 0 , 0 0 0 $ 2 , 4 8 2 , 0 0 0 $ 1 , 5 5 6 , 0 0 0 $ 1 , 98 3 , 0 0 0 $ 1 , 9 8 0 , 0 0 0 $ 2 , 2 1 6 , 0 0 0 $ 2 , 4 5 9 , 00 0 $ 2 , 6 9 0 , 0 0 0 $ 2 , 9 7 4 , 0 0 0 $ 3 , 3 0 8 , 0 0 0 Ta x e s $1 , 7 2 4 , 0 0 0 $ 2 , 0 0 5 , 0 0 0 $ 2 , 1 3 4 , 0 0 0 $ 2 , 27 0 , 0 0 0 $ 2 , 4 1 5 , 0 0 0 $ 2 , 6 2 1 , 0 0 0 $ 2 , 8 4 4 , 00 0 $ 3 , 0 8 6 , 0 0 0 $ 3 , 3 4 8 , 0 0 0 $ 3 , 6 3 3 , 0 0 0 Tr a n s f e r s O u t t o Ca p i t a l F u n d 8 $4 , 3 6 5 , 0 0 0 $ 5 , 0 4 5 , 0 0 0 $ 5 , 7 6 0 , 0 0 0 $ 6 , 04 4 , 0 0 0 $ 6 , 8 9 0 , 0 0 0 $ 5 , 3 7 5 , 0 0 0 $ 5 , 5 2 1 , 00 0 $ 6 , 2 1 9 , 0 0 0 $ 6 , 4 8 0 , 0 0 0 $ 7 , 7 6 9 , 0 0 0 Ex p e n d i t u r e T o t a l s $1 4 , 8 8 6 , 0 0 0 $ 1 5 , 7 0 7 , 0 0 0 1 6 , 4 2 5 , 0 0 0 $ 1 7 , 53 6 , 0 0 0 $ 1 8 , 8 0 0 , 0 0 0 $ 1 8 , 0 1 6 , 0 0 0 $ 1 8 , 9 3 0 , 00 0 $ 2 0 , 4 1 7 , 0 0 0 $ 2 1 , 5 5 6 , 0 0 0 $ 2 3 , 8 1 1 , 0 0 0 En d i n g F u n d B a l a n c e $3 , 8 5 4 , 0 0 0 $ 4 , 2 9 9 , 0 0 0 $ 5 , 0 1 7 , 0 0 0 $ 5 , 70 6 , 0 0 0 $ 6 , 2 2 9 , 0 0 0 $ 1 1 , 6 1 6 , 0 0 0 $ 1 8 , 0 8 5 , 00 0 $ 2 5 , 4 3 6 , 0 0 0 $ 3 4 , 0 1 5 , 0 0 0 $ 4 3 , 3 6 8 , 0 0 0 Bo n d R e s e r v e s $1 , 9 5 5 , 0 0 0 $ 1 , 6 5 3 , 0 0 0 $ 1 , 5 7 5 , 0 0 0 $ 1 , 57 5 , 0 0 0 $ 1 , 5 7 5 , 0 0 0 $ 1 , 8 1 2 , 0 0 0 $ 2 , 0 5 7 , 00 0 $ 2 , 3 3 3 , 0 0 0 $ 2 , 6 1 9 , 0 0 0 $ 2 , 9 6 0 , 0 0 0 Ca p i t a l O u t l a y ( F u n d 42 5 ) $6 , 6 0 1 , 0 0 0 $ 5 , 6 2 7 , 0 0 0 $ 5 , 9 6 3 , 0 0 0 $ 6 , 31 4 , 0 0 0 $ 7 , 1 6 4 , 0 0 0 $ 8 , 0 7 1 , 0 0 0 $ 8 , 3 9 4 , 00 0 $ 9 , 4 0 1 , 0 0 0 $ 9 , 7 7 7 , 0 0 0 $ 1 1 , 6 2 1 , 0 0 0 No t e s : (1 ) S o u r c e : W a t e r U t i l i t y R a t e M o d e l . (2 ) W a t e r S a l e s S e r v i c e r e v e n u e i n c l u d e s r a t e r e v e n u e p l u s i n t e r e s t o n n o t e s f r o m S k y w a y W a t e r D i s t r i c t ( 2 0 1 1 & 2 0 1 2 o n l y ) . (3 ) W a t e r F e e s r e v e n u e i n c l u d e s I n s p e c t i o n F e e s , I n s t a l l a t i o n F e e s , U t i l i t y B i l l i n g F e e s , a n d o t h e r M i s c e l l a n e o u s F e e s . (4 ) I n t e r f u n d R e v e n u e i n c l u d e s s o f t - c a p i t a l t r a n s f e r s f o r l a b o r & b e n e f i t s f o r C i t y e m p l o y e e s w o r k i n g o n t h e W a t e r C a p i t a l I m p r ov e m e n t P r o g r a m ( C I P ) a n d Pr o j e c t R e i m b u r s e m e n t s f r o m o t h e r f u n d s . O t h e r m i n o r a m o u n t s a r e al s o t r a n s f e r r e d f r o m S t r e e t M a i n t e n a n c e , W a s t e w a t e r M a i n t e n a n ce, and Surface Wa t e r M a i n t e n a n c e . (5 ) O t h e r R e v e n u e p r i m a r i l y i n c l u d e s r e n t a l f e e s p a i d b y c o m m u n i ca t i o n s c o m p a n i e s f o r l e a s i n g a n t e n n a s p a c e s i n r e s e r v o i r s i t e s . (6 ) I n c l u d e s b o t h W h o l e s a l e W a t e r P u r c h a s e s a n d W a t e r I n v e n t o r y p u r c h a s e s - p i p e s , a s p h a l t , a n d o t h e r m a t e r i a l s n e e d e d f o r m a i n tenance work. (7 ) I n c l u d e s d e b t p a y m e n t s f o r P W T F L o a n s a n d B o n d s . (8 ) T r a n s f e r t o C a p i t a l I m p r o v e m e n t P r o j e c t s F u n d ( F u n d 4 2 5 ) f o r a n n u a l C I P e x p e n d i t u r e s . December 2012 1-1 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Ch01.docx Chapter 1 INTRODUCTION 1.1 PURPOSE The City prepared this Plan to document the status and analyze the future needs of the water utility system. This Plan is largely an updated version of the City’s 2005 Plan. The purpose of this Plan is to document changes to the City’s water system, to identify required system modifications, and to appropriately outline capital improvements projects to meet future water demands. Maintaining a current Plan is required to meet the regulations of the DOH and the requirements of the Washington State Growth Management Act. This plan complies with the requirements of DOH as set forth in the WAC 246-290-100, Water System Plan. This Plan contains timeframes, which are the intended framework for future funding decisions and within which future actions and decisions are intended to occur. However, these timeframes are estimates, and depending on factors involved in the processing of applications and project work, and availability of funding, the timing may change from the included timeframes. The framework does not represent actual commitments by the City of Renton, which may depend on funding resources available. 1.2 AUTHORIZATION Recognizing the importance of planning, developing, and financing water system facilities to provide reliable service for the existing customers and to serve anticipated growth, the City initiated the preparation of this Plan. In August 2010, the City selected the Carollo Engineers team to assist the City in the preparation of the updated Plan in accordance with applicable rules and regulations governing planning for water utility systems. 1.3 OBJECTIVES This Plan has been prepared to serve as a guide for planning and designing future water system facilities and to assist the City in using its water resources in the most efficient manner possible. Identified in this Plan are system improvements intended to meet the expanding and changing needs of the City. Specific objectives of this Plan are addressed by individual chapters presented herein and include the following:  Develop a document that can be updated periodically as additional information on the water system is obtained.  Description of Existing System (Chapter 2): Document the existing water system supply, storage, and distribution facilities. December 2012 1-2 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Ch01.docx  Planning Data and Water Demand Forecast (Chapter 3): Identify and estimate the effect of future land uses and population trends on the water system. Document historical water use and project future demands based on growth projections.  Water Conservation Program (Chapter 4): Identify the role that water use efficiency will have in reducing future water requirements and how the City’s water conservation program will be implemented.  Water System Policies, Criteria, and Standards (Chapter 5): Establish clear policies and criteria relating to water service and within the City’s water system.  Water Supply and Water Rights (Chapter 6): Document existing and potential future water supply and water rights, and discuss existing and forthcoming regulatory requirements on the City water system.  System Analysis (Chapter 7): Update the computerized model for analysis of the system. Assess the capability of the existing water system to meet existing and projected future demands, identify water system deficiencies.  Operations Program (Chapter 8): Provide a comprehensive review of operations and maintenance of system facilities.  Capital Improvement Program (Chapter 9): Develop a program of capital improvements, including priorities for design and construction.  Financial Program (Chapter 10): Develop a plan for financial backing of required system improvements.  Prepare an environmental checklist for City Council action on the proposed water system plan. The checklist is to be reviewed by the various City departments for a threshold determination.  Prepare a plan to comply with the requirements of the DOH. 1.4 LOCATION The City of Renton is located within King County at the southeastern end of Lake Washington. Interstate 405 (I-405) runs through the middle of the service area, from its western boundary, up through its northern boundary. The Cedar River divides the City’s RWSA between the north and south. Its water system provides service to an area of approximately 16 square miles that is largely coincident with the city limits. The water distribution system serves the valley floors and parts of five surrounding hills: West Hill, the Highlands, Scenic Hill (also known as Renton Hill), Talbot Hill, and Rolling Hills. The City currently serves customers within an elevation range of 11 feet to 476 feet. This range creates a need for at least four separate pressure zones. However, physical barriers such as hills and valleys often prevent the extension of a pressure zone from one location to another. As a result of Renton’s topography and geography, the City has 15 hydraulically distinct pressure zones. December 2012 1-3 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Ch01.docx the City’s RWSA is bordered by nine adjacent water systems: the Skyway Water and Sewer District, Seattle Public Utilities, the City of Tukwila, the City of Kent, the Soos Creek Water and Sewer District, the Cedar River Water and Sewer District, King County Water District No. 90, the Coal Creek Utility District, and the Wasmeta Park Water System. Figure 1.1 shows the City’s neighboring water utilities, as well as the RWSA boundaries. 1.5 OWNERSHIP AND MANAGEMENT The City has a City Council–Mayoral form of government. Members of the Council and the Mayor are elected officials. The Mayor is the head of the executive branch of the government and is the chief executive officer of the City government and as such has general supervision over the several departments of the City and over all its interests. Figure 1.2 shows the organization of the drinking water utility. With the exception of the billing function, the operation of the utility falls under the supervision of the Administrator of the Planning/Building/Public Works Department, Mr. Gregg Zimmerman. Some of the City offices that provide support to the operation of the Drinking Water Utility are not shown on the organizational chart. For example, the Human Resources/Risk Management Department provides hiring, benefits, insurance, some types of training and other support to the utility; the Information Services Division provides computer, networking and telecommunications support; and the City Attorney’s Office provides legal support. Budgets are formulated by the departments and are presented by the Mayor to the City Council for approval. Expenditures for items in a Council-approved budget are approved by the Administrator, the Mayor or the Council depending upon the amount of expenditure. 1.6 SYSTEM HISTORY The history of the City’s system is well documented in the previous Water System Plans prepared for the City by CH2M Hill in 1965, by RH2 Engineering in 1983 and 1990, by the City and RH2 Engineering in 1998, and by the City and RW Beck in 2006. The detailed information presented in those documents is not repeated in this document. For those interested, the 1965, 1983, 1990, 1998 and 2006 Water System Plans are available from the City. However, some of the history of the system is included in this plan for the sake of convenience, details of which can be found primarily in Chapter 2. The City’s water system provides service to a full-time residential population of approximately 54,000, approximately 20,000 temporary and transient users, and approximately 28,000 regular non-residential users. In addition, the City supplies water on a wholesale basis to Skyway Water and Sewer District through a single metered connection. The retail water service area (shown in Figure 1.3), includes service to some parts of unincorporated King County. Chapter 2 provides a more detailed description of the development of the water system by facility. !"`$ %&e( !"b$ ?è ?À ?¿ ?ç ?Å ?æ ?í ?Ç Se a t t l e Pu b l i c U t i l i t i e s Ma p l e w o o d A d d i t i o n Wa t e r C o o p . 8th Ave S SE May Valley Rd SE 128th St SE 192n d St SE 240TH ST 148th Ave SE SE 224TH ST S 212th St 196th Ave SE Rento n Av e S S 188th S t Mi li tary R d S 24th Ave S 140th Ave SE E M a r g i n al W a y S S 216th S t 10 8th Ave Talbot Rd S S 200th St E Valley Rd S 240TH ST SE 176th St S E P etrovitsky R d Edmonds Ave NE SW 43rd St Interurb a n Ave S B e acon Ave S F r o n t St S WAX RD244th Ave SE S 192nd St My er s Way S 184th Ave SE 84th Ave S Duvall Ave NE S Bangor St 164th Ave SE 132nd Ave SE S 178th St SE 200th St S 128th St E JAMES ST 96th Ave S S W G ra d y Wa y N 30th St 16th Ave S Park Ave N S 156th St SE 72nd St SE 164th St W MEEKER ST 116th Ave SE SE 240TH ST 1st Ave S Military Rd S S 128th St SE 208th St Cedar Grove Rd SE SE Jones Rd E Mercer W ay Southcenter Blvd Orillia Rd S SE May Valley Rd Ci t y o f R e n t o n Ci t y o f K e n t KC W a t e r D i s t r i c t # 9 0 Ci t y o f T u k w i l a So o s C r e e k W a t e r an d S e w e r D i s t r i c t Ce d a r R i v e r W a t e r an d S e w e r D i s t r i c t Co a l C r e e k W a t e r an d S e w e r D i s t r i c t Sk y w a y W a t e r an d S e w e r D i s t r i c t Figure 1.1 Adjacent Purveyors Water System Plan Update City of Renton 0 4 , 5 0 0 9 , 0 0 0 Fe e t O Le g e n d Ro a d s Cit y L i m i t s Wa t e r b o d y Re t a i l W a t e r S e r v i c e A r e a Ad j a c e n t P u r v e y o r s Ce d a r R i v e r W a t e r an d S e w e r D i s t r i c t Ci t y o f K e n t Ci t y o f T u k w i l a Co a l C r e e k W a t e r an d S e w e r D i s t r i c t KC W a t e r D i s t r i c t 9 0 Sk y w a y W a t e r an d S e w e r D i s t r i c t Se a t t l e P u b l i c U t i l i t i e s So o s C r e e k W a t e r an d S e w e r D i s t r i c t Ma p l e w o o d A d d i t i o n Wa t e r C o o p . pw : / / C a r o l l o / D o c u m e n t s / C l i e n t / W A / R e n t o n / 85 9 5 A 0 0 / D e l i v e r a b l e s / F i gu r e s / F i g 0 1 . 0 2 . d o c x DRINKING WATER ORGANIZATION FIGURE 1.2 CITY OF RENTON WATER SYSTEM PLAN UPDATE !"`$ %&e( !"b$ ?è ?ç ?Å ?æ ?í ?æ SE May Valley Rd SE 128th St SE 192nd St 148th Ave SE 196th Ave SE Re nton Ave S 140th Ave SE 108th A ve Talbot Rd S E Valley Rd SE 176th St SE Petrovitsky Rd Edmonds Ave NE SW 43rd St Interurb an A v e S B e acon Ave S F r o n t St S 184th Ave SE 84th Ave S Duvall Ave NE S Bangor St 164th Ave SE 132nd Ave SE S 178th St SE 200th St S 12 8 th St 96th Ave S S W G ra d y W ay N 30th St Park Ave N SE 72nd St SE 164th St 116th Ave SE SE 208th St Cedar Grove Rd SE SE Jones Rd E M ercer W ay Southcenter Blvd Orillia Rd S SE May Valley R d La k e W a s h i n g t o n La k e Yo u n g s Ce d a r R i v e r La k e De s i r e Sp r i n g La k e La k e Ka t h l e e n Pa n t h e r La k e Sh a d y La k e La k e B o r e n Figure 1.3 Service Area Water System Plan Update City of Renton04,5009,000FeetOLegendRoadsRetail Water Service Area Future Retail Water Service Area City Limits Urban Growth Boundary Waterbody December 2012 1-7 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Ch01.docx 1.7 EXISTING SERVICE AREA CHARACTERISTICS The City’s RWSA boundaries were initially defined by the East King County Coordinated Water System Plan (City of Renton Agreement CAG-075-89, October 18, 1989) and its update (CAG-97-100, June 12, 1997) and by the Skyway Coordinated Water System Plan (CAG-076-89, October 18, 1989). These boundaries were further refined by agreements with the adjacent water purveyors: Skyway Water and Sewer District (CAG-03-197, December 31, 2003), Soos Creek Water and Sewer District (CAG-083-91, August 6, 1991 and CAG-97-164, October 10, 1997), and Cedar River Water and Sewer District (CAG-99- 014, February 8, 1999). The RWSA boundaries are shown on Figure 1.3. It is unlikely that the City’s RWSA will change very much in the future because of the geography of the surrounding areas and the fact that all of the surrounding areas are currently served by other water purveyors. The only possible change to the City’s RWSA boundaries in the future is an adjustment to the boundaries to include the area “Future Retail Water Service” shown in Figure 1.3. This area was originally defined in the Skyway Coordinated Water System Plan and is also described in service area agreement between the City and Skyway Water and Sewer District. The area would only become part of the water service area upon annexation into the City. 1.7.1 Service Area Agreements Copies of current service area agreements are included in Appendix D. The following is a list of the service area agreements that the City has with adjacent purveyors:  CAG-03-197 – Agreement between the City of Renton and the Skyway Water and Sewer District for the Establishment of Water and Sewer Service Boundaries, December 31, 2003.  Seattle Agreements – 1998.  City of Seattle Ordinance 119202, October 22, 1998: – Interlocal Agreement between the City of Seattle and the City of Renton for use of certain Renton right-of-way by Seattle and use of certain Seattle owned property by Renton, November 9, 1998. – Water Purveyor Contract between the City of Seattle and the City of Renton for the Sale of Wholesale Water by Seattle to Renton, November 1, 1998. – Lease Agreement No. 327-815 (18-23-5 SE) between the City of Seattle and the City of Renton, November 9, 1998. – Agreement for the Transfer of Water Service and Provision of Primary Fire Service between the City of Seattle and the City of Renton, November 9, 1998.  City of Renton Ordinance 1544, Granting Franchise to City of Seattle for 36-inch supply line in 132nd Avenue SE, May 1, 1956. December 2012 1-8 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Ch01.docx  CAG-02-123 – Agreement for the Sale of Water in an Emergency by the City of Renton to the City of Renton, November 30, 2002.  CAG-99-014 - Agreement between the City of Renton and the Cedar River Water and Sewer District for the Establishment of Service Boundaries, February 8, 1999.  CAG-97-100 – Agreement for Establishing Utility Service Boundaries as Identified by the East King County Coordinated Water System Plan, June 12, 1997 (1996 Update to Plan).  CAG-075-89 - Agreement for Establishing Utility Service Boundaries as Identified by the East King County Coordinated Water System Plan, October 18, 1989.  CAG-076-89 - Agreement for Establishing Water Service Boundaries as Identified by the Skyway Coordinated Water System Plan, October 18, 1989.  CAG-97-164 – City of Renton and Soos Creek Water and Sewer District Interlocal Agreement for the Establishment of Service Boundaries, October 10, 1997 (Amendment)  CAG-083-91 - City of Renton and Soos Creek Water and Sewer District Agreement for the Transfer of Facilities and for the Establishment of Service Boundaries, August 6, 1991.  CAG-93-097 – City of Renton and Bryn Mawr – Lakeridge Water and Sewer District – Contract for Water Supply and Joint Storage and Transmission, January 1, 1993 (Bryn Mawr – Lakeridge Water and Sewer District is now part of Skyway Water and Sewer District).  CAG-95-034 – Agreement for the Emergency Sale of Water between the City of Renton and the City of Tukwila, March 21, 1995.  CAG-95-071 - Agreement for the Emergency Sale of Water between the City of Renton and the City of Kent, May 17, 1995. 1.8 ENVIRONMENTAL ASSESSMENT A State Environmental Policy Act (SEPA) Checklist and determination of non-significance (DNS) has been prepared for this Plan. The City anticipates this Plan does not have probable significant adverse impacts on the environment in accordance with the DNS under WAC 197-11-340(2). Many of the projects proposed within the Plan will require subsequent project specific environmental review and SEPA checklists as part of their preliminary and final design process. The SEPA Checklist and DNS are included in Appendix A. December 2012 1-9 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Ch01.docx 1.9 APPROVAL PROCESS This Plan is required to meet state, county, and local requirements. It complies with the requirements of the DOH as set forth in the Washington Administrative Code (WAC) 246- 290-100. The City will submit this plan to the DOH, the DOE, King County, adjacent utilities, and local governments as part of the Agency Review process. See Appendix B for the Comment Letters. The Adopting Resolution will be included in Appendix C, upon Plan approval by the City Council. 1.10 RELATED PLANS The following plans are related to the City of Renton Water System Plan:  King County Comprehensive Plan, including 2008 King County Comprehensive Plan Update (adopted October 6, 2008) and 2009 and 2010 technical updates.  City of Renton Comprehensive Plan (adopted November 1, 2004) and 2005 through 2010 updates.  East King County Coordinated Water System Plan (updated in 1996).  Skyway Coordinated Water System Plan (1989).  Sky Way Water and Sewer District Comprehensive Plan (approved update – 2005).  City of Tukwila Water System Plan (approved update – 2005).  Seattle Public Utilities Water System Plan (approved update – 2007).  City of Kent Water System Plan (approved update – 2009).  Soos Creek Water and Sewer District (approved update – 2005).  Cedar River Water and Sewer District (approved update – 2007).  King County Water District No. 90 Comprehensive Water System Plan (approved update – 2009).  Coal Creek Utility District Comprehensive Plan (approved update - 2005).  City of Renton Water System Plan (approved update – 2006).  City of Renton Wastewater Plan (approved update – 2010). The City is not aware of any inconsistencies between this plan and the plans listed above. December 2012 1-10 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Ch01.docx 1.11 ACKNOWLEDGEMENTS Carollo Engineers and Pacific Groundwater Group, wish to acknowledge and thank the following individuals for their efforts and assistance in completing this Plan:  Greg Zimmerman, Public Works Department Administrator.  Lys Hornsby, Utility Systems Division Manager.  Abdoul Gafour, Water Division Supervisor.  J. D. Wilson, Water Division Manager IV Utilities/GIS Engineer.  Raymond Sled, Water Operations Supervisor.  Tom Malphrus, Water Capital Projects Engineer. December 2012 2-1 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx Chapter 2 EXISTING SYSTEM 2.1 SYSTEM OVERVIEW The City owns and operates a multi-source municipal water system, which includes supply, treatment, storage, and distribution of potable water to residential, commercial, industrial, and wholesale customers. Service is provided to an area of approximately 16 square miles and 17,400 retail customers (service connections) and one wholesale customer, Skyway Water and Sewer District, via a single metered connection. The Water Service area is shown on Figure 1.2 in Chapter 1 – Introduction. Figure 2.1 presents the water facility locations. Water supply sources include five wells (RW-1, RW-2, RW-3, PW-8, and PW-9) and one spring (Springbrook Springs) that are used for normal supply. These wells are located in Liberty Park and Cedar River Park, pump from a relatively shallow aquifer (Cedar River Delta Aquifer), and are referred to as the Downtown Wells. Well EW-3 also pumps from this aquifer and is available as an emergency back-up only. Well PW-5A, which can serve three pressure zones, is available to use during high demand periods. However, the water from this well, as currently treated, has less than desirable aesthetic quality due to iron, manganese, and ammonia in the raw water. Well PW-5A pumps from a deep aquifer in the Kennydale area of north Renton. The City continues to gather data for the Maplewood wellfield (Wells PW-11, PW-12, and PW-17) for the purpose of obtaining perfected water right certificates for the wells. The primary purpose of this wellfield is to provide an alternate source of supply in the event of the contamination of the Downtown Wells. A secondary purpose of the wells is for additional instantaneous flow during high demand periods. The permits for the wells set the system wide annual withdrawal (Qa) to no more than the existing certificated Qa of 14,809.5 acre feet; i.e., the proposed annual water rights are supplemental, not additional. The wells pump from a deep aquifer underlying the Maplewood Golf Course. The City is a wholesale customer of SPU. The City has six metered interties with the SPU transmission mains, which are available to serve wholesale water to the Renton distribution system. All water consumed in The City’s RWSA must pass through a well or spring and potentially several pump stations. Because of this, the City’s water system is maintenance-intensive, with facilities for pumping, water quality control, and emergency power generation. Areas within the City’s RWSA may have similar elevations, but cannot be served as part of the same pressure zone due to the geography. As an example, the pressure zones in the Highlands area have not been extended across Maple Valley into the Renton Scenic Hill or Talbot Hill areas, even though the elevations served on these two hills are similar. The Cedar River Valley has provided a physical barrier that has precluded joining of December 2012 2-2 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx hydraulically similar pressure zones. As a result of these physical barriers and the elevation range served, 15 pressure zones are necessary, as shown in Table 2.1. Table 2.1 Pressure Zones by Geographical Area Pressure Zone Serves VLY 196 Valley Floor KD 218, KD 320, HLD 435, and HLD 565 Highlands and Kennydale areas WH 300, EARL 370, and WH 495 West Hill and Earlington areas SH 370 and RH 490 Scenic Hill and Rolling Hills areas WTH 300, ETH 300, TH 350, RH 395, RH 490, and RH 590 Rolling Hills and East and West Talbot Hill areas Figure 2.1, Existing System, shows how water moves horizontally through the system. Figure 2.2 is a hydraulic profile of the system and shows how water moves vertically through the water system. All of the pressure zones are hydraulically interrelated with the lowest pressure zone, the Valley 196 Zone, in the valley floor. Additionally, the Rolling Hills and Highlands zones can be supplied from the Maplewood wellfield (79 Pressure Zone, where 79 is the overflow elevation of clearwell). All supply to the system not consumed in the Valley 196 Zone is pumped to higher pressure zones. It is desirable to have two or more connections (or supply points) within each pressure zone that allow water to move upward to a higher pressure zone, or downward to a lower pressure zone. This maximizes system reliability by providing multiple paths or routes that the water can take when moving between pressure zones. Pumping is accomplished by nine online BPSs and two standby booster stations that are located throughout the City. The water from the downtown wells and the artesian spring is first pumped, or in the case of the spring flows, into the lowest pressure zone in the valley floor, and then is pumped up to the West Hill, Highlands, Renton Hill, Talbot Hill, and Rolling Hills Zones for consumption. Water from the Maplewood wells is pumped from a post-treatment clearwell into the Highlands and Rolling Hills Zones. Water from PW-5A is pumped into the Highlands 435 Zone. The two standby pump stations, one PRV station, and one metered connection can supply water to the Rolling Hills / Talbot Hill service area from interties with the Seattle Cedar River and Bow Lake transmission pipelines. One intertie (PRV station) can supply water to the Earlington 370 Zone from the Seattle Bow Lake transmission pipeline. One intertie (PRV station) can supply water to the Valley 196 Zone from the Seattle Bow Lake transmission pipeline. Currently there are ten reservoirs in the system, strategically located to provide adequate equalizing and fire flow reserves for all pressure zones. PRVs are used to supply lower pressure zones from higher pressure zones that contain water storage reservoirs. kj kj TT #* kj kj +C kj kj #* kj +Ckj#*#* #* kjkj+C kj #*#* #* #* #* #*#* #* #*#* #*kj kj kj kj kj kj kj kj kjkj kj +C +C +C )I )I )I )I )I )I )I )I )I )I )I )I )I )I %&e(?è ?ç ?Å ?æ?í SE 128th St SE 192nd St 148th Ave SE S 212th St 140th Ave SE 108th Ave Talbot Rd S E Valley Rd SE 176th St Edmonds Ave NE SW 43rd St 84th Ave S Duvall Ave NES Bangor St 132nd Ave SE S 128th St 96th Ave S S W Grad y Wa y N 30th St Park Ave NSE 72nd St SE 164th St 116th Ave SE SE 208th St E M ercer W ay SE May Valley Rd Maplewood BPS West Hill BPS HighlandsBPS HazenReservoir Houser Way BPS Fred Nelson BPS PW-8 PW-9 EW-3 North Talbot BPS South Talbot BPS Tiffany Park BPS PW-12 PW-11 PW-17 Rolling Hills BPS Monroe Avenue BPS PW-5A Mt Olivet Reservoir West Hill Reservoir South Talbot Reservoir North Talbot Reservoir RW-1, 2 & 3 Springbrook Springs Upper & Lower Gallery Springbrook Springs Treatment Plant HighlandsChlorinationFacilityHighlands1.5 & 2.0MG 435Reservoirs Rolling Hills Reservoirs 494 & 594 Highlands0.75 MG565 Reservoir Maplewood Chlorination Facility Maplewood Clearwell Lake Washington Cedar River Green River Panther Lake Lake Boren Black River Forbay May Creek Lake Youngs Green River Springbrook Creek Kent Intertie SWD Station #36 SWD Station #39 SWD Station #37 SWD Station #34 SWD Station #33 SWD Station #38 SkywayWholesale Tukwila Intertie Boeing CSTC Fire Coal Creek IntertieWD 90/Renton Intertie Renton/Seattle Intertie Boeing Plant Meter - East and West Figure 2.1 Water Facility Locations Water System Plan Update City of Renton 02,0004,000 Feet OLegend +C Treatment Plant kj Reservoir #*Well T Spring Pump Station PRV )I Interties Water Distribution System 8" and Smaller 10 - 16" 18" and Larger Roads Waterbody Retail Water Service Area Pressure Zones Valley 196 West Hill 495 Earlington 370 West Hill 300 Highlands 435 Kennydale 320 Kennydale 218 Highlands 565 Rolling Hills 490 Scenic Hill 370 East Talbot Hill 300 Rolling Hills 590 Rolling Hills 395 Talbot Hill 350 West Talbot Hill 300 Talbot Hill 270 December 2012 2-4 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx 2.2 WATER SYSTEM DESCRIPTION Several changes to the City’s water system have occurred since the completion of the 2006 Water System Plan Update. A description of each facility and any major changes are summarized in the following sections. 2.2.1 Source of Supply The City has nine supply sources that supply water from three aquifers and one artesian spring. Each of the supply sources are described in detail below, including development and improvements to each source. Table 2.2 lists the active supply sources and the rated capacity of each. The table does not include the inactive source, Well 4, or the Seattle interties. 2.2.1.1 Springbrook Springs (DOH Source S05) Located at the south end of the City, Springbrook Springs (Spring) is an artesian spring and was first used in 1909. The infiltration gallery was upgraded and a sanitary seal was added in 1976 (project number W-0422). Chlorination was added in 1976 (W-0423). The chlorination building is located approximately 300 yards from the infiltration gallery and is adjacent to the transmission main. Fluoridation was added in 1986 (W-0851) via an addition to the chlorination building. Corrosion control treatment to comply with the Lead & Copper Rule (pH adjustment with sodium hydroxide) was added in 1999 (W-2238). A sodium hydroxide storage building was added as part of this project. The City has acquired ownership of a significant amount of property to form a watershed directly surrounding the Spring. A chain link fence has been erected around the property to restrict access to and activities within the watershed. The last segment of chain link fence was installed in 2002 (W-2980). The Spring provides direct service to the Valley 196 Zone. In June of 2010, a motorized valve was added to the treatment facility to stop the flow of water when the chlorine residual drops below a safe level. The power source is a 20-kW generator (propane fuel source). The generator is auto-start and the transfer from commercial power to electric generator power is automatic. Currently, flow control is via a manually set gate valve (throttling valve). December 2012 2-5 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx Table 2.2 Active Supply Sources Name Water Right Status Water Right Qi Maximum Physical Capacity with Installed Equipment Standby Power (gpm)(gpm)(mgd) Springbrook Certificate 1,050 1,050 1.51 Auto Start & Transfer Well RW-1 Certificate 2,200 2,200 3.17 Auto Start & Transfer Well RW-2 Certificate 2,200 2,200 3.17 Auto Start & Transfer Well RW-3 Certificate 2,200 2,200 3.17 Auto Start & Transfer Well PW-8 Certificate 3,500 3,500 5.04 Trailer-in / Manual Well PW-9 Certificate 1,300 1,300 1.87 Trailer-in / Manual Subtotal 12,450 12,450 17.93 Well PW-5A Certificate 1,500 1,250 1.44 Trailer-in / Manual Subtotal 1,500 1,250 1.44 Well PW-11 Permit 2,500 2,500 3.60 None Well PW-12 Permit 1,500 1,500 2.16 Trailer-in / Manual1 Well PW-17 Permit 1,500 1,500 2.16 Trailer-in / Manual1 Subtotal 5,500 5,500 7.92 Well EW-3 None2 1,500 1,500 1.44 Trailer-in / Manual Notes: 1. Either PW-12 or PW-17, not both. 2. Emergency use only, when RW-1, RW-2, RW-3, PW-8, or PW-9 is out of service. 2.2.1.2 Wells 1, 2, and 3 (DOH Source S10 – Wellfield) Wells PW-1 and PW-2 were originally drilled in 1942 and were replaced by Well RW-1 (DOH Source S01) and RW-2 (DOH Source S02) in 1988 (W-0880). Well PW-3 was originally drilled in 1959 and the wellhead constructed in 1962 (W-0119) and was replaced by Well RW-3 (DOH Source S03) (W-0880) which is co-located with RW-1 and RW-2 in a wellhouse in Liberty Park adjacent to Houser Way N and the Cedar River. The water right for PW-3 was transferred to RW-3. Project W-0880 included chlorination and fluoridation. Corrosion control treatment to comply with the Lead & Copper Rule (pH adjustment with sodium hydroxide) was added in 1999 (W-2238). A manual transfer switch with Kirk-Key safety system was added in 1999 to allow the wellhouse to be powered by a City-owned portable generator (W-2784). In 2007, an emergency electrical power generation facility was constructed at the Mt. Olivet Reservoir and BPS site to provide backup power for the Mt. Olivet BPS and Wells RW-1, RW-2, and RW-3 (W-3239). A power transmission line was installed from the new power facility to an automatic transfer switch located at the transformer adjacent to the wellhouse. Now the December 2012 2-6 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx primary means of providing Wells 1, 2, and 3 with emergency backup electrical power is via the power generation building and the automatic transfer switch. The portable generator and manual transfer switch configuration remains as a secondary backup. The automatic transfer switch, which was originally installed in 1988 (W-0880), was rebuilt in 2010. Primary disinfection with continuous chlorine concentration monitoring – using a loop of large diameter pipe in Liberty Park – was added to the three wells in 2003 (W-2893). Each well is individually metered and is controlled by the elevation in the North Talbot Reservoir. Additionally, in 2010 the backpressure control valves were converted to flow control valves to prevent the flow rate from exceeding the water right Qi. The meters are located inside the wellhouse. The wells are pumped into the Valley 196 Zone. 2.2.1.3 Well 8 (DOH Source S07) Well PW-8 was drilled in 1968 and the wellhead constructed in 1969 (W-0310). The facility is located in Cedar River Park adjacent to Interstate 405. Project W-0310 included chlorination. Fluoridation was added in 1986 (W-0851). Corrosion control treatment to comply with the Lead and Copper Rule (pH adjustment with sodium hydroxide) was added in 1999 (W-2238). The electrical system was rehabilitated in 1990 (W-1020). The rehab included an automatic transfer switch and stubbing out a 4-inch electrical conduit from the main panel to the west side of the building for a future emergency power feed (refer to WTR-13-0035, Emergency Power System Study, 1989). This is a metered source and is controlled by the elevation in the North Talbot Reservoir. The meter is located in a vault adjacent to the wellhouse. The well is pumped into the Valley 196 Zone. 2.2.1.4 Well 9 (DOH Source S09) Well PW-9 was drilled in 1984 (W-0665) and the wellhead constructed in 1985 (W-0718). It is located in Cedar River Park near where I-405 crosses State Route 169 (SR-169). Project W-0718 included chlorination and stubbing out a 3½-inch electrical conduit from the main panel to the west side of the building for a future emergency power feed (refer to WTR-13- 0035, Emergency Power System Study 1989). Fluoridation was added in 1986 (W-0851). Corrosion control treatment to comply with the Lead & Copper Rule (pH adjustment with sodium hydroxide) was added in 1999 (W-2238). This is a metered source and is controlled by the elevation in the North Talbot Reservoir. The meter is located in a vault adjacent to the wellhouse. The well is pumped into the Valley 196 Zone. 2.2.1.5 Emergency Well 3 (DOH Source S16) Emergency Well EW-3R was drilled in 1999 (W-2315) and the wellhead constructed in 2003 (W-2915). It is located in Liberty Park near the intersection of Houser Way N and Bronson Way N. This well replaced EW-3. EW-3 was the original Well PW-3. W-2315 included chlorination, fluoridation, and treatment for corrosion control. The project also included switchgear and a receptacle to feed power from a portable generator set. This is a December 2012 2-7 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx metered source and is controlled by the elevation in the North Talbot Reservoir. The meter is located inside the wellhouse. The well is pumped into the 196 Zone. 2.2.1.6 Well 5 (DOH Source S04) Well PW-5A was drilled in 1988 (CAG-070-86) and the wellhead constructed in 1991 (W-0888). The well is located on the northwest corner of Jones Avenue NE and NE 24th Street. PW-5A replaced PW-5 (formerly Kennydale Well No. 1), which had severe sanding problems and could not be successfully redeveloped. The original PW-5 was drilled in 1953. Project W-0888 included chlorination and fluoridation as well as switchgear and a receptacle to feed power from a portable generator set. Treatment for corrosion control is not necessary, as the pH of the raw water is about 8.0. This source can be used for summer peaking supply but has taste and odor problems. The raw water, like that of the Maplewood wellfield, contains hydrogen sulfide, iron, manganese, and ammonia. At some time in the future, additional treatment will be added to address these problems. This is a metered source and is controlled by the elevation of the Highlands 435 Reservoirs. The meter is located in a vault 45 feet to the east of the wellhouse. The well is pumped into the Highlands 435 Zone. 2.2.1.7 Maplewood Wellfield (DOH Source S13) Located at the Maplewood Golf Course on Maple Valley Highway, the Maplewood Wellfield consists of three wells: PW-11 (DOH Source S11), PW-12 (DOH Source S15), and PW-17 (DOH Source S12). PW-11 and PW-17 were drilled in 1989 (CAG-88-030) and the wellheads constructed in 1991 (W-0850 and W-1027). PW-12 was drilled in 1994 (WTR-13- 042) and the wellhead constructed in 1998 (W-2279). Treatment for the water from these wells is provided at the Maplewood Treatment and Booster Pump Station Facility, which was constructed in 1995 (W-1052). The raw water contains hydrogen sulfide, ammonia, manganese, and a small amount of iron. The original strategy for treating the water was to remove hydrogen sulfide using aeration and to keep the manganese in solution using ortho- polyphosphate (sequestering) as well as chlorinating and fluoridating the water. Treatment for corrosion control is not necessary, as the pH of the raw water is about 8.0. The presence of ammonia was discovered after the plant went online. The sequestering did not work and the water utility received numerous complaints regarding staining, taste, and odor. The method used for secondary disinfection was changed from chlorination to chloramination, which limited the areas in which the water could be used in the distribution system due to problems with mixing the Maplewood water with the water from the other sources. In January 2002, the City shut the wellfield down and began design and construction efforts to replace the treatment. A treatment pilot plant study had been conducted in June and July of 2001. The resulting design consists of: 1. Converting hydrogen sulfide to sulfate by adding oxygen from air and reacting on granular activated carbon filters. December 2012 2-8 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx 2. Removing manganese with green sand filters. 3. Converting ammonia to nitrogen gas by adding chlorine and reacting in a contact basin. Construction (W-2953) of a new treatment building began in October 2003 and the treatment plant was put into operation in September 2006. The project included changing the method of chlorination from chlorine gas to sodium hypochlorite liquid. Fluoridation is accomplished by using the existing plant. The project also included a manual switchgear with Kirk-Key safety system to allow powering one 1,500-gallon-per-minute (gpm) well, one 1,500-gpm low-lift pump, and one 1,500-gpm high- lift pump and associated treatment equipment with a City-owned portable generator. Each well is individually metered. The meters are located in the new treatment building. Flow from each well is kept below the proposed Qi water right by using flow control valves. The wells are controlled by either the elevation in the Highlands 565 Reservoir or the Rolling Hills 590 and 490 Reservoirs (see discussion of Rolling Hills Booster Pump Station – in particular the back-pressure sustaining valves regulating the flow between the 490 and 590 pressure zones). The treated water is pumped to the clearwell located at the existing Maplewood Treatment / Booster Pump Station facility. From the clearwell, the water is pumped to either the Highlands 565 Zone or the Rolling Hills 590 Zone. The City continues to gather data on the operation of the wellfield for the purpose of developing an operational strategy and operations plan. 2.2.1.8 Well 4 (DOH Source S06) Well 4 was drilled in 1942 for the Northwest Water Company. The well was removed in 1962. The City has an active water right of 170 gpm for the well (GWC 884-D). 2.2.1.9 Seattle Interties (DOH Source S08) Currently there are ten interties with SPU. Two of the interties are used to supply water to the Boeing Renton Plant via two 10-inch mains. Prior to 2001, Seattle sold this water directly to Boeing. In 2001, in accordance with a revised franchise agreement between Seattle and Renton, the metering points for the two 10-inch service lines were moved closer to the SPU Cedar River Pipelines (W-2890), the source, and Renton began purchasing the water wholesale from Seattle and selling the water to Boeing. One of the ten interties was originally constructed as a retail supply point for Seattle to provide water to the Longacres Racetrack site. In 1994, the connection was upgraded (W- 2071) and is currently used as a backup fire flow supply for the Boeing Longacres site. This is an 8-inch connection to the 60-inch SPU Bow Lake transmission main at PRV Station 24. This intertie was modified in 2010 (W-3553) with a flow control valve so that it can be used to provide wholesale water to the Renton system in the future. December 2012 2-9 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx One of the interties is configured for supplying water to the SPU Mercer Island Pipeline. The remaining six interties are currently used for summer peaking supply. These are SPU Station Nos. 33, 34, 36, 37, 38, and 39 and are further described in Table 2.3, All Interties of All Types. Table 2.3 All Interties of All Types Name Meter Size Location Other System Flow Direction Maximum Flow Rate Interties with Seattle Public Utilities PRV 28 SPU Sta. #33 6 Shattuck Ave S & S 23rd St Seattle To Renton 700 Fred Nelson SPU Sta. #34 8 Benson Rd S & S 26th St Fred Nelson BPS Seattle To Renton 925 SPU Sta. #36 6 Jones Av S & S 7th St Seattle To Renton 700 PRV 6 SPU Sta. #37 3 / 3 Beacon Way near Renton Ave S Seattle To Renton 320 PRV 35 SPU #38 6 S 134th St & Thomas Ave S Seattle To Renton 700 Tiffany Park SPU Sta. #39 10/8 Kirkland Ave SE & SE 158th St Tiffany Park BPS Seattle Two-way 1,050 PRV 241 Bow Lake Pipeline 8 1901 Oakesdale Ave SW (1,250 feet south) Seattle To Renton 2,8002 Renton / Seattle 10 Union Ave SE & SE 2nd Pl Seattle To Seattle 1,950 Intertie with the City of Kent PRV 25 Kent 10 SE 43rd St & Lind Ave SW Kent Two-way 1,950 Intertie with Skyway Water & Sewer District Skyway Wholesale 10 80th Ave S & S 116th St Skyway To Skyway 1,950 Interties between Seattle Public Utilities and the Renton Boeing Plant Boeing Plant Meter - East 10 Logan Ave S & S 2nd St Seattle To Boeing Plant 1,950 Boeing Plant Meter - West 10 Logan Ave S & S 2nd St Seattle To Boeing Plant 1,950 December 2012 2-10 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx Table 2.3 All Interties of All Types Name Meter Size Location Other System Flow Direction Maximum Flow Rate Emergency Interties PRV 53 Coal Creek UD 8 2610 Lynnwood Ave NE Coal Creek UD To Coal Creek Utility District 1,250 PRV 23 Tukwila 8 17300 West Valley Hwy S Tukwila Two-way 1,250 Dimmitt BPS3 6 12603 82nd Ave S Skyway Two-way 2,8004 Notes: 1. Currently used to provide backup fire flow to the Boeing Longacres site and as source of supply to Renton. Historically it was used for domestic, irrigation and fire flow supply for the Longacres Racetrack site. 2. Connection transitions from 8” to 10” to 12”. 3. The Dimmitt BPS is owned and operated by Skyway Water and Sewer District. 4. Connection transitions from 6” to 8” to 12”. 2.2.2 Storage Water storage within the distribution system provides for operational, equalizing, firefighting, and standby storage. Storage is provided by reservoirs and elevated tanks located within the distribution system. The City currently operates ten distribution system storage facilities and an operational storage/equalizing/detention reservoir at the Maplewood Treatment Plant. This section provides a description of the function and condition of each of these facilities. Currently two of the reservoirs have flow meters – Highlands 565 and Hazen Reservoirs. Table 2.4 lists all of the City’s existing storage facilities and summarizes the physical characteristics. The recommended sizing and location of future storage facilities are presented in Chapter 9, Capital Improvement Program. 2.2.2.1 North Talbot Reservoir (Valley 196 Zone) Located at Talbot Hill Park near the intersection of Talbot Road S and S 19th Street, this 5- million-gallon (MG), cast-in-place, reinforced concrete underground reservoir was constructed in 1976 (W-0419). The reservoir replaced two uncovered 0.5-MG reservoirs that occupied the same site. In 1989, CH2M Hill visually inspected the reservoir and noted the following:  The joint sealant was in good condition.  Leaching of the concrete was observed.  The leaching of the columns was slightly greater than observed on comparable structures. December 2012 2-11 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx CH2M Hill made the following recommendations:  Drain and inspect the reservoir every two to five years.  Replace the ladder and overflow pipe supports with stainless steel.  Install galvanic cathodic protection anodes to protect metal associated with the intake piping, wash-down piping, and other metals submerged in the reservoir. The interior was visually inspected again in 2010 by Water Utility staff who noted that all steel and iron surfaces were badly corroded, including the access ladder; inlet/outlet pipe and 2.5-inch wash down pipes, which are no longer usable. The floor slab appeared to be in good shape with no exposed rebar and minor pitting near the columns. The columns appeared to be in fair condition with some areas of exposed aggregate and rust staining. The origin of the rust staining was not determined. The roof to column connections appeared to be in good condition. The exterior of the reservoir roof is a tennis court. It has been noted that several large and small “bird baths” exist on the roof and retain rain water during storm events. 2.2.2.2 Mount Olivet Reservoir (Valley 196 Zone) Located near the intersection of NE 3rd Street and Bronson Way NE, this 3-MG above- ground welded steel tank was constructed in 1954 (W-1141). CH2M Hill has periodically inspected it over the years (1969, 1977, 1982, 1985, 1989, and 1997). In 1971, an impressed current cathodic protection system was installed (W-0371). The exterior was recoated in 1978 (W-0476). The interior was recoated in 1991 (W-1035). The exterior was recoated and the cathodic protection system replaced in 1999 (W-2787). The exterior was recoated again in 2008 (W-3449) because of the failure of the 1999 coating. The interior was inspected most recently in 2010. The steel stringers between the roof beams are corroded badly and need to be replaced. In 2009, the City performed a preliminary design (WTR-13-0104, Water Distribution Storage Planning Study), which estimated the cost of replacing the reservoir at $8.25 million for a 6.9-MG reservoir. This project is included in the City’s water Capital Improvements Plan (Chapter 9). 2.2.2.3 Highlands 435 Reservoir – 1.5-MG(Highlands 435 Zone) Located at the Highlands Reservoir site east of the intersection of NE 12th Street and Monroe Avenue NE, this reservoir was originally constructed as an uncovered reservoir during World War II (circa 1942). The reservoir was concrete-lined, rectangular in shape, partially in-ground and partially above ground with bermed excavated material. In 1966, the reservoir was covered (W-0098). In 1986, the beams for the cover were sand blasted and painted. In 1987, the roof beams were inspected for cracks; none were found (W-0909). In 2000, CH2M Hill inspected the reservoir for leaks and a preliminary design was conducted to increase the inflow and outflow piping (WTR-13-0072). The inspection was prompted by a concern that the Highlands 1.5-MG and 2-MG reservoirs had been damaged December 2012 2-12 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx in the January 28 1995, Robinson Point earthquake (5.0 magnitude) as evidenced by wet ground around the chlorination booster station building (further examination discovered the problem was a leaking service line). Because of the concern that the two Highlands 435 Zone Reservoirs will suffer major damage in a large earthquake, the City plans to replace them in the future. In 2009, the City performed a preliminary design (WTR-13-0104, Water Distribution Storage Planning Study), which estimated the cost of replacing both of the Highlands 435 Zone Reservoirs (1.5 MG and 2.0 MG) at $21.3 million for a 15.2-MG, two- compartment reservoir built in two phases. This project is included in the City’s water Capital Improvements Plan (Chapter 9). 2.2.2.4 Highlands 435 Reservoir – 2-MG (Highlands 435 Zone) Also located at the Highlands reservoir site, this covered, concrete lined, partially in-ground, partially aboveground reservoir was constructed in 1960 (W-0024). In 1986, the beams for the cover were sand blasted and painted. In 1987, the roof beams were inspected for cracks; some were found at the column locations (W-0909). In 1992, reinforcing collars were installed at the roof beam-column intersections and various cracks and joints in the concrete liner were sealed (W-1081). See discussion above for the 2000 inspection. See discussion of reservoir replacement above. Replacement of this reservoir is also included in the City’s water Capital Improvements Plan (Chapter 9). 2.2.2.5 Highlands 565 Reservoir - 0.75-MG (Highlands 565 Zone) Also located at the Highlands reservoir site, this 0.75-MG elevated steel reservoir was constructed in 1960 (W-0018). CH2M Hill has periodically inspected it over the years (1969, 1973, 1977, 1985 1989, and 1998) as part of an evaluation of all reservoirs, and again in 2009 with water utility staff. In 2010, LiquiVision Technology performed a dive inspection of the interior surfaces. In 1971, an impressed-current cathodic protection system was installed (W-0371). The exterior was recoated in 1978 (W-0476). In 1996, Chicago Bridge & Iron inspected the reservoir. In 1997, the interior of the reservoir was recoated, the impressed cathodic protection system was replaced, and additional railing and a safety climb rail were added (W-2210). Also, in 1997 the exterior of the reservoir was recoated (W-2303). During the Nisqually earthquake of February 28 2001, (6.8 magnitude) the cross bracing of the tower structure was plastically deformed. In 2003, the bracing was repaired and the tank structure seismically rehabilitated (W-3005). The rehabilitation consisted of installing friction dampeners on the cross bracing and flexible connections where the water mains interface with the tanks. In 2009, a two-way flow meter was added to the single inlet / outlet pipe that connects the reservoir to the distribution system (W-3214). The exterior of the reservoir is due to be recoated during the time period 2011 – 2014. Replacement of this reservoir is included in the City’s water Capital Improvements Plan (Chapter 9). December 2012 2-13 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx 2.2.2.6 Hazen 565 Reservoir - 4.2-MG (Highlands 565 Zone) Located north of the Hazen High School campus at the south end of the property with address 4901 NE Sunset Boulevard, this 4.2-MG steel standpipe was constructed in 2009 (W-3214). It has flow meters on both the inlet and outlet pipes. 2.2.2.7 Rolling Hills 590 Reservoir (Rolling Hills 590 Zone) Located at the Rolling Hills reservoir site near the intersection of Puget Drive SE and Edmonds Avenue SE, this 0.3-MG elevated steel reservoir was constructed in 1970 (W-0323). The exterior was recoated in 1980 (W-0524). During the Nisqually earthquake of February 28, 2001, (6.8 magnitude) the cross bracing of the tower structure was plastically deformed. In 2003, the bracing was repaired and the tank structure seismically rehabilitated (W-3005). The rehabilitation consisted of installing friction dampeners on the cross bracing and flexible connections where the water mains interface with the tanks. In addition to this work, both the interior and exterior were recoated and an impressed current cathodic protection system was installed. 2.2.2.8 Rolling Hills 490 Reservoir (Rolling Hills 490 Zone) Also located at the Rolling Hills reservoir site, this 3-MG above-ground steel tank was constructed in 2001 (W-2230). 2.2.2.9 West Hill Reservoir (West Hill 495 Zone) Located adjacent to Dimmitt Middle School near the intersection of 82nd Avenue S and S 126th Place, this 1.3-MG steel standpipe was constructed in 1985 (W-0489). Both the interior and exterior of the reservoir were recoated in 2010. Additionally, two concentric rings of handrail on the top of the standpipe were constructed and an impressed current cathodic protection system was added (W-3488). 2.2.2.10 South Talbot Reservoir (South Talbot 350 Zone) Located on Mill Avenue SE south of Carr Road, this 1.5-MG above-ground steel tank was constructed in 1990 (W-0722). CH2M Hill inspected the tank in 1998 (WTR-13-0063) and its interior and exterior protective coatings were founded to be in good and very good condition, respectively. In 2008, the exterior was recoated due to pitting (due to rocks being thrown at the tank) (W-3449). The interior of this tank will be recoated within the next five years. December 2012 2-14 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx Ta b l e 2 . 4 E x i s t i n g S t o r a g e F a c i l i t i e s Re s e r v o i r Na m e a n d Zo n e Gr o s s Vo l u m e (g a l ) Ba s e El e v a t i o n (f t ) Ov e r f l o w El e v a t i o n (N A V D 19 8 8 ) ( f t ) He i g h t (f t ) Ga l l o n s pe r f o o t Hi g h e s t Se r v i c e El e v a t i o n (f t ) Re s e r v o i r El e v a t i o n @ 4 0 p s i (f t ) Re s e r v o i r El e v a t i o n @ 3 0 p s i (f t ) Re s e r v o i r El e v a t i o n @ 2 0 ps i ( f t ) Re s e r v o i r Vo l u m e w/ 4 0 p s i re s i d u a l (g a l ) Reservoir Volume w/30 psi residual (gal) Reservoir Volume w/20 psi residual (gal) No r t h Ta l b o t 1 9 6 5, 0 7 8 , 3 8 1 1 7 3 . 2 1 9 9 . 6 2 6 . 5 V a r i e s 1 3 0 2 2 2 . 3 1 9 9 . 2 1 7 6 . 2 0 1 2 1 , 1 8 4 5 , 0 7 8 , 1 5 1 Mt O l i v e t 19 6 2, 8 1 4 , 5 5 2 1 4 6 . 9 1 8 4 . 1 3 7 . 2 7 6 , 6 8 0 1 3 0 2 2 2 . 3 1 9 9 . 2 1 7 6 . 2 0 0 6 0 5 , 7 7 2 Hi g h l a n d s 43 5 ( 1 . 5 mg ) 1, 5 5 5 , 2 2 3 4 2 5 . 6 4 4 0 . 3 1 4 . 7 V a r i e s 3 6 5 4 5 7 . 3 4 3 4 . 2 4 1 1 . 2 0 8 3 3 , 5 5 0 1 , 5 5 5 , 2 2 3 Hi g h l a n d s 43 5 ( 2 . 0 mg ) 1, 9 4 7 , 6 6 4 4 2 5 . 3 4 3 9 . 8 1 4 . 5 V a r i e s 3 6 5 4 5 7 . 3 4 3 4 . 2 4 1 1 . 2 0 1 , 0 3 1 , 6 5 0 1 , 9 4 7 , 6 6 4 Hi g h l a n d s 56 5 74 7 , 9 8 5 5 3 4 . 1 5 6 9 . 1 3 5 . 0 V a r i e s 4 7 4 5 6 6 . 3 5 4 3 . 2 5 2 0 . 2 4 2 , 8 9 8 5 9 0 , 1 0 5 7 4 7 , 9 8 5 Ha z e n 5 6 5 4 , 2 0 3 , 8 1 3 4 5 7 . 5 5 6 9 . 1 1 1 1 . 8 3 7 , 6 0 1 4 7 4 5 6 6 . 3 5 4 3 . 2 5 2 0 . 2 1 1 2 , 8 0 3 9 8 1 , 3 8 6 1 , 8 4 6 , 2 0 9 Ro l l i n g H i l l s 59 0 30 0 , 0 0 0 5 6 5 . 5 5 9 3 . 1 2 8 . 0 V a r i e s 4 7 6 5 6 8 . 3 5 4 2 . 2 5 2 2 . 2 2 7 7 , 6 0 0 3 0 0 , 0 0 0 3 0 0 , 0 0 0 Ro l l i n g H i l l s 49 0 3, 0 3 6 , 5 3 5 4 5 8 4 9 4 . 5 3 6 . 5 8 3 , 1 9 3 3 9 2 4 8 4 . 3 4 6 1 . 2 4 3 8 . 2 8 4 8 , 5 6 8 2 , 7 7 0 , 3 2 7 3 , 0 3 6 , 5 3 5 We s t H i l l 49 5 1, 3 9 4 , 1 5 5 3 9 5 . 6 4 9 8 . 6 1 0 3 . 0 1 3 , 5 3 5 3 9 6 4 8 8 . 3 4 6 5 . 2 4 4 2 . 2 1 3 9 , 8 1 0 4 5 2 , 0 6 9 7 6 3 , 3 7 4 So u t h Ta l b o t 3 5 0 1, 5 8 6 , 1 9 0 3 2 6 . 6 3 5 3 . 6 2 7 . 0 5 8 , 7 4 8 2 4 4 3 3 6 . 3 3 1 3 . 2 2 9 0 . 2 1 , 0 1 6 , 3 4 0 1 , 5 8 6 , 1 9 0 1 , 5 8 6 , 1 9 0 Ma p l e w o o d Cl e a r w e l l 21 2 , 8 4 6 7 1 . 0 7 9 . 3 8 . 3 2 5 , 5 5 1 N / A N / A N / A N / A N / A N / A N / A December 2012 2-15 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx 2.2.3 Booster Pump Stations The City has now has eleven BPSs that provide regular and emergency supply from the sources of supply and lower pressure zones within the service area to the higher service areas. The Windsor Hills BPS was taken out of service in 2010. It had been a backup to the Mt Olivet and Houser Way BPS. A description of each of the facilities is included in the following discussion. Table 2.5 provides a summary of each of the pump stations and the rated capacity of each pump. 2.2.3.1 Mt. Olivet Booster Pump Station Located adjacent to the Mount Olivet Reservoir, the Mt Olivet BPS pumps from the Valley 196 Zone to the Highlands 435 Zone. The BPS was constructed in 1967 (W-0262). In 1989, one booster pump was added and the electrical, heating, and ventilation systems were rehabilitated (W-0931). In 2007, an emergency electrical power generation facility was constructed at the Mt Olivet reservoir and BPS site to provide backup power for the Mt Olivet BPS and wells RW-1, RW-2, and RW-3 (W-3239). This BPS now has emergency backup electrical power with auto-start of the generator and auto-transfer from commercial to backup power. Flow from the station is measured by one meter located in a vault outside the station. The pumps are controlled by the elevations of the Highlands 435 Zone reservoirs. Replacement of this BPS is planned with replacement of the Mt. Olivet Reservoir. This project is included in the City’s water CIP (Chapter 9). 2.2.3.2 Houser Way Booster Pump Station Located on the northwest corner of the intersection of Houser Way N and N Marion Street, the Houser Way BPS pumps from the Highlands 196 pressure zone to the Highlands 435 and Kennydale 320 pressure zones. The BPS was constructed in 1996 (W-2089). The station has a receptacle for an emergency generator hook-up and a manual transfer switch. Meters located inside the station measure flow to the two pressure zones. The pumps are controlled by: 1. The elevations of the Highlands 435 Zone reservoirs. 2. The pressure in the Kennydale 320 Zone measured at the station. December 2012 2-16 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx Ta b l e 2 . 5 B o o s t e r P u m p S t a t i o n s Na m e Zo n e Pu m p s Fr o m Zo n e Pu m p s T o Pu m p Nu m b e r Pu m p Ca p a c i t y (g p m ) Hp To t a l (g p m ) To t a l (m g d ) Standby Power Mt . O l i v e t V L Y 1 9 6 H L D 4 3 5 1 1 , 0 5 0 1 0 0 A u t o S t a r t / A u t o T r a n s f e r 2 1 , 5 0 0 1 5 0 A u t o S t a r t / A u t o T r a n s f e r 3 1 , 8 0 0 2 0 0 A u t o S t a r t / A u t o T r a n s f e r 4 , 3 5 0 6 . 2 6 Ho u s e r W a y V L Y 1 9 6 K D 3 2 0 1 7 0 0 4 0 T r a i l e r - i n / M a n u a l 7 0 0 1 . 0 0 V L Y 1 9 6 H L D 4 3 5 2 2 , 0 5 0 2 0 0 T r a i l e r - i n / M a n u a l 3 2 , 0 5 0 2 0 0 T r a i l e r - i n / M a n u a l 4 , 1 0 0 5 . 9 0 Mo n r o e A v e H L D 4 3 5 H L D 5 6 5 1 1 , 5 0 0 7 5 N o n e 2 1 , 0 0 0 5 0 N o n e 2 , 5 0 0 3 . 6 0 Hi g h l a n d s H L D 4 3 5 H L D 5 6 5 1 1 , 5 0 0 6 0 A u t o S t a r t / A u t o T r a n s f e r 2 1 , 2 0 0 6 0 A u t o S t a r t / A u t o T r a n s f e r 3 1 , 2 0 0 6 0 A u t o S t a r t / A u t o T r a n s f e r 3 , 9 0 0 5 . 6 2 We s t H i l l V L Y 1 9 6 W H 4 9 5 1 6 0 0 6 0 N o n e 2 6 0 0 6 0 N o n e 3 1 0 0 0 1 0 0 A u t o S t a r t , Diesel Direct Drive 2 , 2 0 0 3 . 1 6 December 2012 2-17 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx Ta b l e 2 . 5 B o o s t e r P u m p S t a t i o n s Na m e Zo n e Pu m p s Fr o m Zo n e Pu m p s T o Pu m p Nu m b e r Pu m p Ca p a c i t y (g p m ) Hp To t a l (g p m ) To t a l (m g d ) Standby Power Ro l l i n g H i l l s R H 4 9 0 R H 5 9 0 1 2 , 5 0 0 1 0 0 A u t o S t a r t / A u t o T r a n s f e r 2 2 , 5 0 0 1 0 0 A u t o S t a r t / A u t o T r a n s f e r 3 1 , 0 0 0 4 0 A u t o S t a r t / A u t o T r a n s f e r 4 1 , 0 0 0 4 0 A u t o S t a r t / A u t o T r a n s f e r 5 , 0 0 0 1 7 . 2 0 No r t h T a l b o t V L Y 1 9 6 R H 4 9 0 1 1 , 7 5 0 2 5 0 A u t o S t a r t / A u t o T r a n s f e r 2 1 , 5 0 0 2 0 0 A u t o S t a r t / A u t o T r a n s f e r 3 9 3 3 1 2 5 A u t o S t a r t / A u t o T r a n s f e r 4 , 1 8 3 6 . 0 2 V L Y 1 9 6 T H 3 5 0 5 5 0 0 3 0 A u t o S t a r t / A u t o T r a n s f e r 5 0 0 0 . 7 2 Ma p l e w o o d M W D 7 9 R H 5 9 0 1 1 , 5 5 0 3 0 0 T r a i l e r - i n / M a n u a l 2 2 , 4 0 0 4 5 0 N o n e 2 , 4 0 0 2 3 . 4 6 Ma p l e w o o d M W D 7 9 H L D 5 6 5 4 2 , 4 0 0 4 5 0 N o n e 5 1 , 5 5 0 3 0 0 T r a i l e r - i n / M a n u a l 2 , 4 0 0 2 3 . 4 6 So u t h T a l b o t V L Y 1 9 6 T H 3 5 0 1 2 0 0 T r a i l e r - i n / M a n u a l 2 6 0 0 T r a i l e r - i n / M a n u a l 3 3 , 5 0 0 T r a i l e r - i n / M a n u a l 4 3 , 5 0 0 T r a i l e r - i n / M a n u a l 3 , 5 0 0 3 5 . 0 4 December 2012 2-18 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx Ta b l e 2 . 5 B o o s t e r P u m p S t a t i o n s Na m e Zo n e Pu m p s Fr o m Zo n e Pu m p s T o Pu m p Nu m b e r Pu m p Ca p a c i t y (g p m ) Hp To t a l (g p m ) To t a l (m g d ) Standby Power Ti f f a n y P a r k S P U 4 9 0 R H 5 9 0 1 3 5 0 2 5 N o n e 2 7 0 0 4 0 N o n e 1 , 0 5 0 1 . 5 1 Fr e d N e l s o n S P U 4 9 0 R H 5 9 0 2 7 0 0 4 0 N o n e 3 3 5 0 2 5 N o n e 1 , 0 5 0 1 . 5 1 Di m m i t t S k y w a y 46 0 WH 4 9 5 1 3 0 0 1 5 A u t o S t a r t / A u t o T r a n s f e r 2 3 0 0 1 5 A u t o S t a r t / A u t o T r a n s f e r 3 3 0 0 1 5 A u t o S t a r t / A u t o T r a n s f e r 4 2 , 4 0 0 2 0 0 A u t o S t a r t / A u t o T r a n s f e r 1 , 6 0 0 4 2 . 3 0 No t e s : 1. A n y t w o p u m p s m a y b e o p e r a t e d a t o n e t i m e . 2. T h e c u r r e n t m a x i m u m c a p a c i t y o f t h e w e l l f i e l d i s 3 , 0 0 0 g p m a nd i s l i m i t e d b y c u r r e n t i n s t a l l e d t r e a t m e n t . T w o o f t h e 1 , 5 5 0 g pm pumps or on e o f t h e 2 , 4 0 0 g p m p u m p s m a y b e o p e r a t e d a t o n e t i m e b a s e d u p o n tr e a t m e n t l i m i t a t i o n s . W h e n r u n n i n g o n g e n e r a t o r p o w e r t h e l i mit is on e o f t h e 1 , 5 5 0 - g p m p u m p s . 3. O n l y o n e o f t h e 3 , 5 0 0 - g p m f i r e p u m p s c a n b e r u n a t o n e t i m e . 4. T h e D i m m i t t B P S i s o w n e d a n d o p e r a t e d b y t he S k y w a y W a t e r & S e w e r D i s t r i c t . T h i s i s a n e m e r g e n c y i n t e r t i e . T h e r e a r e t w o m o d es of mo v i n g w a t e r f r o m t h e S k y w a y s y s t e m t o t h e R e n t o n s y s t e m . O n e mo d e i s p u m p i n g f r o m t h e S k y w a y 4 6 0 z o n e . T h e r e i s a p h y s i c a l l i m it of 1, 6 0 0 g p m i n t h i s m o d e b e c a u s e o f l i m i t e d s i z e o f t h e m e t e r e d c o nn e c t i o n t o t h e z o n e ( f e d f r o m a S e a t t l e P u b l i c U t i l i t i e s t r a n s mission main) an d b e c a u s e o f f r i c t i o n l o s s e s . P u m p i n g a b o v e 1 , 6 0 0 g p m c a u s e s n e g a t iv e p r e s s u r e s o n t h e s u c t i o n si d e o f t h e p u m p . T h e o t h e r m o de is a gr a v i t y f e e d f r o m t h e S k y w a y 5 5 0 z o n e v i a a P R V l o c a t e d i n t h e b o o s t e r p u m p s t a t i o n . December 2012 2-19 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx 2.2.3.3 Monroe Avenue Booster Pump Station Located on the northwest corner of the intersection of NE 4th Street and Monroe Avenue NE, the Monroe Avenue BPS pumps from the Highlands 435 Zone to the Highlands 565 Zone. An 8-inch SCADA-controlled (supervisory control and data acquisition) transfer valve can allow flow from the Highlands 565 Zone to the Highlands 435 Zone. The valve is used in coordination with the Maplewood BPS when it is pumping into the Highlands 565 Zone. The BPS was constructed in 1969 (W-0324). In 1991, the station’s electrical system was rehabilitated (W-1048). Flow from the station is measured by one meter located in the station. The pumps are controlled by the elevation of the Highlands 565 Reservoir. The pump station does not have emergency power back-up capability. Installing back-up power is included in the City’s water Capital Improvements Plan (Chapter 9). Highlands Booster Pump Station Located at the Highlands Reservoir site, the Highlands BPS pumps from the Highlands 435 Zone to the Highlands 565 Zone. The BPS was constructed in 1960 (W-0018). In 1989, two pumps and motors were replaced and the third pump was rebuilt; the electrical system was rehabilitated (W-0924). An isolation valve was installed in 1992 (W-1023). In 2003, the wooden doors on the west side of the building were replaced with metal. This station has emergency power back-up with auto-start and auto-transfer (W-0815). Flow from the station is measured by one meter located in a vault outside the station. The pumps are controlled by the elevation in the Hazen 565 Reservoir. Replacement of this pump station is planned with the Highlands 435 Reservoirs. This project is included in the City’s water Capital Improvements Plan (Chapter 9). 2.2.3.4 North Talbot Booster Pump Station Located near the intersection of SR 515 (Benson Road) and South 19th Street, the North Talbot BPS pumps from the Valley 196 Zone to the Rolling Hills 490 and Talbot Hill 350 Zones. It originally pumped to the Rolling Hills 590 Zone and Talbot Hill 350 Zone. The BPS was constructed in 1979 (W-0450). A manual transfer switch with Kirk-Key safety system was added in 1999 to allow the station to be powered by a City-owned portable generator (W-2784). In 2007, an emergency electrical power generation facility was constructed at the North Talbot Reservoir site to supply power to the North Talbot BPS (W-3239). The power is auto-start and auto-transfer. The portable generator and manual transfer switch configuration remains as a secondary backup. In 2001, a back-pressure sustaining valve was added to the station’s primary discharge when a portion of the Rolling Hills 590 Zone was converted to the Rolling Hills 490 Zone as part of the Rolling Hills 3-MG reservoir and pump station project (W-2230). The station’s electrical, heating, and ventilation and control systems were rehabilitated in 2003 (W-2878). Flow to the two pressure zones is measured by meters located inside the station. The pumps are controlled by: December 2012 2-20 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx 1. The elevation in the Rolling Hills 490 Reservoir. 2. The elevation in the South Talbot Reservoir. 2.2.3.5 Rolling Hills Booster Pump Station Located at the Rolling Hills reservoir site, the Rolling Hills BPS pumps from the Rolling Hills 490 Zone to the Rolling Hills 590 Zone. The BPS was constructed in 2001 (W-2230). Two back-pressure sustaining valves in the pump station allow water to flow from the Rolling Hills 590 Zone to the Rolling Hills 490 Zone when the Rolling Hills 590 Reservoir is near overflow. This is to allow the Rolling Hills 3-MG reservoir to be filled by either the Maplewood BPS or North Talbot BPS. Two flow meters are located inside the station. One flow meter measures flow from the Rolling Hills 490 Zone to the Rolling Hills 590 Zone. Another meter measures flow from the Rolling Hills 590 Zone to the Rolling Hills 490 Zone. The pumps are controlled by the elevation in the Rolling Hills 590 Reservoir. This pump station is equipped with an emergency generator with auto-start and auto-transfer, but only allows two pumps to operate at the same time. It is recommended that back-up power be installed such that all four pumps can run at the same time. This project is included in the City’s water Capital Improvements Plan (Chapter 9). 2.2.3.6 Tiffany Park Booster Pump Station Located in Tiffany Park near the intersection of Kirkland Avenue SE and SE 20th Court, the Tiffany Park BPS pumps from the SPU 66-inch Cedar River transmission main to the Rolling Hills 590 Zone. The BPS was constructed in 1962 (W-0226). The pumps were replaced in 1972 (W-0383). The entire station was rehabilitated in 1984 (W-0742). It does not have emergency power back-up capability. In 2011, a flow meter was installed. The pumps are controlled by the elevation in the Rolling Hills 590 Reservoir. 2.2.3.7 Fred Nelson Booster Pump Station Located adjacent to the Nelsen Middle School on Benson Road S, the Fred Nelson BPS pumps from SPU 60-inch Bow Lake transmission main to the Rolling Hills 590 Zone. The BPS was constructed in 1962 (W-1125). It does not have emergency power back-up capability. In 2011, a flow meter was installed. The pumps are controlled by the elevation in the Rolling Hills 590 Reservoir. 2.2.3.8 Maplewood Booster Pump Station Located at the Maplewood Golf Course, the Maplewood BPS pumps from the Maplewood wellfield clearwell to the Highlands 565 and Rolling Hills 590 Zones. The BPS was constructed in 1995 (W-1052). Any one of its 1,500 gpm pumps will have emergency back- up power (manual transfer – see discussion of Maplewood wellfield, above). Adding back- up power to the BPS is included in the City’s water Capital Improvements Plan (Chapter 9). December 2012 2-21 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx Flow to the two pressure zones is measured by meters located inside the station. The pumps are controlled by: 1. The elevation in the Highlands 565 Reservoir. 2. The elevations in the Rolling Hills 490 and 590 Reservoirs. 2.2.3.9 South Talbot Booster Pump Station Located on SW 43rd Street just west of SR 167, the South Talbot BPS pumps from the Valley 196 Zone to the Talbot Hill 350 Zone. The BPS was constructed in 1982 (W-0600). A manual transfer switch with Kirk-Key safety system was added in 1999 to allow the station to be powered by a City owned portable generator (W-2784). Flow from the station is measured by one meter located in the station. The domestic pumps are controlled by the elevation in the South Talbot Reservoir. The fire flow pumps are controlled by the pressure of the 350 Zone measured at the station. Only one fire pump can operate at one time, the other pump is a back-up. The pump station does not have emergency power back-up capability. Installing back-up power is included in the City’s water CIP (Chapter 9). 2.2.3.10 West Hill Booster Pump Station Located on West Perimeter Road at the Renton Municipal Airport near the control tower, this station pumps from the Valley 196 Zone to the Rolling Hills 495 Zone. The BPS was constructed in 1985 (W-0715). It has one 1,000-gpm fire pump that is driven by a diesel engine with auto-start. Flow from the station is measured by one meter located in the station. The pumps are controlled by the elevation in the West Hill Reservoir. Installing back-up power is included in the City’s water CIP (Chapter 9). 2.2.4 Pressure Zones and Pressure-Reducing Stations The City’s 15 different pressure zones provide pressures in the distribution system that range from 27 to 173 psi. The lowest service pressures occur in an isolated area at the northeast corner of Talbot Road South and Carr Road in the Valley 196 Zone. The service highest pressures occur in an isolated area in the Highlands 435 Zone near the intersection of North 4th Street and Houser Way North. The City currently serves customers within an elevation range of 11 feet to 476 feet. Table 2.6 lists each pressure zone, as it is commonly named, and the hydraulic elevation that each pressure zone provides. The hydraulic elevation is the overflow elevation of the highest reservoir in the pressure zone or the hydraulic elevation set point on the lead pressure-reducing valve. Also included in Table 2.6 are the lowest and highest ground elevations served in each pressure zone and the corresponding pressure at those elevations. December 2012 2-22 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx Figure 2.2 shows the vertical relationship of the system’s pressure zones and demonstrates how water can move up or down through the system. All pressure zones are served directly or indirectly from the City’s active wells and Springbrook Springs. The downtown wells (RW-1, RW-2, RW-3, PW-8, and PW-9) directly supply the Valley 196 Zone. If the water is not consumed in the Valley 196 Zone, and it is needed in a higher zone, it is pumped by booster stations to the higher-pressure zones. Well PW-5A supplies the Highlands 435 Zone directly where it is also available for supply to the Highlands 565 Zone (through booster stations) or to the Kennydale 320 Zone via pressure reducing stations. Wells PW- 11, PW-12, and PW-17 supply the Highlands 565 Zone and Rolling Hills 590 Zone. It is desirable to have two or more connections (or supply points) that will allow water to move to a higher pressure zone, or downward to a lower pressure zone. This arrangement maximizes system reliability by providing multiple paths or routes that the water can take when moving between pressure zones. Although the system has 15 distinct pressure zones, not all of the pressure zones have separate storage or supply facilities. Some pressure zones are supplied exclusively by pressure reducing stations from an upper pressure zone. It is impractical to plan facilities and improvements for all of these pressure zones individually; therefore, the water system has been divided into five operating areas. Each operating area is a single pressure zone or combination of pressure zones with similar operating characteristics. For example, a lower pressure zone that is supplied exclusively by PRVs from an upper pressure zone would be combined with that upper pressure zone to form an operating area. For the majority of this plan, the pressure zones presented in Table 2.7 are included in each operating area. PRV stations are installed between pressure zones and allow water from a higher level pressure zone to flow into a lower level pressure zone at reduced pressures. The PRVs in the pressure reducing stations hydraulically vary the flow rate through the valve to maintain a constant and preset discharge pressure up to the limit of the flow capacity of the valve. The effect of a PRV on the lower pressure zone is the same as that as a reservoir whose overflow elevation is the same as the pressure setting on the valve (hydraulic elevation). Lead PRVs are located in hydraulically remote areas from both upper and lower pressure zone reservoirs to promote good circulation in both pressure zones, thus maintaining water quality. Lag PRVs may be located hydraulically closer to storage to minimize system head losses during high flow rate conditions when the lag valves need to operate. December 2012 2-23 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx Table 2.6 Pressure Zones – Minimum and Maximum Service Pressures and Elevations Pressure Zones Hydraulic Elevation (ft) Maximum Elevation Served (ft) Minimum Service Pressure (psi) Minimum Elevation Served (ft) Maximum Service Pressure (psi) Kennydale 218 218 37 78 25 84 Kennydale 320 320 218 44 15 145 Highlands 435 438.58 365 30 38 173 Highlands 565 568.58 474 36 314 110 Valley 196 199.58 130 27 11 82 West Hill 495 498.58 396 31 113 167 West Hill 300 300 216 36 40 113 Earlington 370 370 261 47 89 122 Scenic Hill 370 370 260 48 110 113 Rolling Hills 590 593.58 476 47 298 128 Rolling Hills 490 494.50 392 40 154 148 Rolling Hills 395 395 300 41 226 73 Talbot Hill 350 353.58 244 44 54 130 East Talbot Hill 300 300 214 37 124 76 West Talbot Hill 300 300 210 39 54 106 Table 2.7 Pressure Zones by Operating Area Operating Area Pressure Zone Valley Valley 196 Highlands 435 / Kennydale Highlands 435, Kennydale 218, and Kennydale 320 Highlands 565 Highlands 565 West Hill West Hill 495, West Hill 300, and Earlington 370 Rolling Hills / Talbot Hill Rolling Hills 590, Rolling Hills 490, Rolling Hills 395, Talbot Hill 350, East Talbot Hill 300, West Talbot Hill 300, and Scenic Hill 370 December 2012 2-25 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx The primary purposes of the PRVs in the City’s system are as follows: 1. To maintain pressures in the lower pressure zone during high demand periods. 2. To increase pressure and flow which would otherwise be required during an emergency such as a fire or pipeline failure. 3. To achieve optimum circulation in each pressure zone, thereby maintaining water quality. When a PRV malfunctions in an open position and allows downstream pressures to rise above the PRV set point, damage can occur due to over pressuring of the pressure zone. The probability of over pressuring the lower pressure zone can be greatly reduced by placing a pressure relief valve on the discharge (pressure-reduced) side of the PRV. If a pressure sensor is also installed on the PRV discharge and the pressure reading is telemetered and alarmed at the central control center, the City will know quickly when the failure is occurring and will be able to minimize damages as a result of the PRV failure. The City’s PRV stations currently in operation are listed in Table 2.8. December 2012 2-26 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx Ta b l e 2 . 8 P r e s s u r e R e d u c i n g S t a t i o n St a t i o n Nu m b e r St a t i o n L o c a t i o n Re c e i v i n g Pr e s s u r e Zo n e Su p p l y i n g Pr e s s u r e Zo n e Ma p Bo o k Pa g e N o Ma p Bo o k De t a i l N o Pr o j e c t Nu m b e r Valve Sizes (in) Valve Elevation (ft) 1 T a y l o r P l N W s o u t h e a s t o f in t e r s e c t i o n o f T a y l o r P l N W a n d St e v e n s A v e N W 60 2 T a y l o r P l N W WH 3 0 0 W H 4 9 5 E 3 1 W - 0 3 0 8 2 4 8 154.6 2 N W 4 t h S t r e e t & L i n d A v e N W 37 1 L i n d A v e N W WH 3 0 0 W H 4 9 5 F 3 2 W - 0 3 0 8 4 8 176.6 3 S W L a n g s t o n R d S W & B a g l e y Pl a c e S W 51 0 L a n g s t o n R d S W WH 3 0 0 E a r l 3 7 0 F 3 3 W - 0 2 8 5 4 8 178.6 47 N W 3 r d S t r e e t & M a p l e A v e N W 30 1 M a p l e A v e N W WH 3 0 0 W H 4 9 5 F 3 3 9 W - 3 1 2 3 2 8 149.0 4 M i l l A v e S & S 6 t h S t r e e t 53 6 M i l l A v e S SH 3 7 0 R H 4 9 0 F 4 4 W - 2 2 4 0 8 157.5 5 C e d a r A v e S & S 5 t h S t r e e t 44 4 C e d a r A v e S SH 3 7 0 R H 4 9 0 F 4 5 W - 0 4 1 0 4 191.6 6 B e a c o n W a y S b e t w e e n R e n t o n Av e S & C e d a r A v e S 13 1 8 B e a c o n W a y S SH 3 7 0 S P U CR P L # 3 49 0 F4 6 W - 1 1 5 6 3 3 267.6 22 R e n t o n A v e S & B e a c o n W a y S 42 4 R e n t o n A v e S SH 3 7 0 R H 4 9 0 F 4 2 0 W - 1 9 3 9 1 . 5 6 222.6 7 B e n s o n R d S & S 1 5 t h S t r e e t So u t h o f 1 2 4 0 B e n s o n R d S ET H 3 0 0 R H 4 9 0 G 4 7 W - 0 6 2 0 2 8 125.9 8 E a g l e R i d g e D r & S 1 5 t h S t r e e t No r t h o f 1 6 0 0 S E a g l e R i d g e D r ET H 3 0 0 R H 4 9 0 G 4 8 W - 0 6 2 0 3 10 220.5 9 N o r t h T a l b o t B P S 73 0 S 1 9 t h S t r e e t TH 3 5 0 R H 4 9 0 G 3 9 W - 0 4 1 9 3 8 165.0 December 2012 2-27 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx Ta b l e 2 . 8 P r e s s u r e R e d u c i n g S t a t i o n St a t i o n Nu m b e r St a t i o n L o c a t i o n Re c e i v i n g Pr e s s u r e Zo n e Su p p l y i n g Pr e s s u r e Zo n e Ma p Bo o k Pa g e N o Ma p Bo o k De t a i l N o Pr o j e c t Nu m b e r Valve Sizes (in) Valve Elevation (ft) 12 S 2 3 r d S t r e e t & W i l l i a m s A v e S 22 1 7 W i l l i a m s A v e S TH 3 5 0 R H 4 9 0 G 3 1 1 W - 2 1 2 6 3 12 222.6 28 S 2 3 r d S t r e e t & S h a t t u c k A v e S 22 2 6 S h a t t u c k A v e S TH 3 5 0 S P U Bo w L a k e Pi p e l i n e 49 0 G3 2 6 W - 1 8 4 8 2 8 188.0 49 S 3 5 t h S t r e e t & W e l l s A v e S We s t o f 1 0 0 1 S 3 5 t h S t r e e t TH 3 5 0 R H 4 9 0 H 4 4 1 W - 3 1 9 0 3 12 198.0 10 S 1 6 t h S t r e e t & T a l b o t R d S Ea s t o f 1 6 0 5 T a l b o t R d S WT H 3 0 0 T H 3 5 0 G 3 1 0 W - 3 1 4 2 2 6 112.0 29 S 2 3 r d S t r e e t & S h a t t u c k A v e S 22 2 6 S h a t t u c k A v e S WT H 3 0 0 T H 3 5 0 G 3 2 5 W - 1 8 4 8 2 8 187.6 13 M e a d o w A v e N & N 2 8 t h S t r e e t 14 4 0 N 2 8 t h S t r e e t KD 3 2 0 H L D 4 3 5 C 4 1 2 W - 2 1 3 6 3 10 203.0 14 M e a d o w A v e N & N 3 2 n d S t r e e t 14 1 5 N 3 2 n d S t r e e t KD 3 2 0 H L D 4 3 5 C 4 1 3 W - 0 4 5 6 4 12 208.6 16 N E 3 r d S t r e e t & S u n s e t B l v d N So u t h o f 3 2 4 S u n s e t B l v d N KD 3 2 0 H L D 4 3 5 F 4 1 4 W - 0 3 9 5 4 12 41.0 26 M a r i n a L a n d i n g A p a r t m e n t s 13 0 0 N 2 0 t h S t r e e t KD 3 2 0 H L D 4 3 5 D 4 2 4 W - 1 9 9 4 2 . 5 10 85.8 39 I n s i d e H o u s e r W a y B P S 32 5 H o u s e r W a y N KD 3 2 0 H L D 4 3 5 F 4 4 7 W - 2 0 8 9 3 10 35.0 43 N 2 6 t h S t r e e t & P a r k A v e N 14 0 5 N 2 6 t h S t r e e t KD 3 2 0 H L D 4 3 5 D 4 8 2 W - 2 8 2 0 2 8 180.0 52 N o r t h o f W e s t H i l l B P S 61 5 W e s t P e r i m e t e r R o a d Re n t o n M u n i c i p a l A i r p o r t KD 3 2 0 W H 4 9 5 E 3 8 6 W - 3 3 2 4 2 2 10 10 21.7 December 2012 2-28 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx Ta b l e 2 . 8 P r e s s u r e R e d u c i n g S t a t i o n St a t i o n Nu m b e r St a t i o n L o c a t i o n Re c e i v i n g Pr e s s u r e Zo n e Su p p l y i n g Pr e s s u r e Zo n e Ma p Bo o k Pa g e N o Ma p Bo o k De t a i l N o Pr o j e c t Nu m b e r Valve Sizes (in) Valve Elevation (ft) 23 T u k w i l a E m e r g e n c y I n t e r t i e 17 3 0 0 W e s t V a l l e y H i g h w a y VL Y 1 9 6 T u k w i l a 36 0 H2 2 1 W - 0 5 1 5 1 . 2 5 8 24.6 24 B o e i n g L o n g a c r e s I n t e r t i e PI D 0 8 8 6 7 0 0 1 4 0 VL Y 1 9 6 S P U Bo w L a k e Pi p e l i n e 49 0 H2 7 9 W - 2 0 7 1 1 0 10 16.5 25 K e n t I n t e r t i e SW 4 3 r d S t r e e t & L i n d A v e S W 42 0 8 L i n d A v e S W VL Y 1 9 6 K e n t 22 0 I3 2 3 W - 0 5 1 5 1 . 2 5 10 17.3 30 P a r k A v e N & N 8 t h S t r e e t 75 0 P a r k A v e N VL Y 1 9 6 K D 3 2 0 E 4 2 7 W - 1 9 2 2 3 12 26.0 31 6 3 6 P a r k A v e N VL Y 1 9 6 K D 3 2 0 E 4 2 8 W - 1 9 2 2 3 12 25.8 32 S W S u n s e t B l v d & M a p l e A v e SW 20 3 S W S u n s e t B l v d VL Y 1 9 6 W H 3 0 0 F 3 2 9 W - 0 8 5 4 2 8 68.4 36 T a l b o t R d S & 1 7 7 t h A v e S E 17 6 0 0 T a l b o t R d S VL Y 1 9 6 T H 3 5 0 I 3 3 3 W - 2 0 9 1 3 12 98.58 37 E a s t o f N 4 t h S t r e e t & H o u s e r Wa y N No r t h o f 3 5 3 S u n s e t B l v d N VL Y 1 9 6 H L D 4 3 5 F 4 3 4 W - 2 0 8 9 3 12 46.0 40 I n s i d e M a p l e w o o d B P S 40 3 0 M a p l e V a l l e y H i g h w a y VL Y 1 9 6 R H 5 9 0 G 6 7 1 W - 1 0 5 2 6 80.0 48 N W C o r n e r o f M a p l e w o o d B P S 40 3 0 M a p l e V a l l e y H i g h w a y VL Y 1 9 6 H L D 5 6 5 G 6 7 1 W - 2 9 5 3 2 2 8 8 80.0 December 2012 2-29 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx Ta b l e 2 . 8 P r e s s u r e R e d u c i n g S t a t i o n St a t i o n Nu m b e r St a t i o n L o c a t i o n Re c e i v i n g Pr e s s u r e Zo n e Su p p l y i n g Pr e s s u r e Zo n e Ma p Bo o k Pa g e N o Ma p Bo o k De t a i l N o Pr o j e c t Nu m b e r Valve Sizes (in) Valve Elevation (ft) 34 B e n s o n R d S & S 2 6 t h S t r e e t SE c o r n e r o f 2 2 2 3 B e n s o n R d S RH 4 9 0 R H 5 9 0 H 4 3 1 W - 1 8 2 7 2 . 5 10 372.0 46 S E 8 t h P l a c e B e t w e e n S 7 t h Co u r t & S E 8 t h S t r e e t So u t h o f 1 8 0 1 S E 8 t h P l a c e RH 4 9 0 R H 5 9 0 G 4 3 8 W - 2 9 8 1 3 12 385.2 35 T h o m a s A v e S W & S W L a n g s t o n Rd PI D 1 8 2 3 0 5 9 0 2 6 EA R L 3 7 0 S P U CR P L # 2 52 0 F3 3 2 W - 1 0 3 3 8 233.0 41 8 4 t h A v e S & R e n t o n A v e S 13 2 2 3 8 4 t h A v e S EA R L 3 7 0 W H 4 9 5 F 3 3 5 W - 2 2 8 0 3 12 218.0 38 I n s i d e M o n r o e A v e B P S Tr a n s f e r V a l v e SE c o r n e r o f 4 0 1 M o n r o e A v e N E HL D 4 3 5 H L D 5 6 5 F 5 4 9 N o n e 8 353.6 44 S h a d o w H a w k C o n d o s SE 1 2 t h S t r e e t & K i r k l a n d A v e S E RH 3 9 5 R H 5 9 0 G 5 3 6 W - 2 9 0 0 3 12 240.5 45 S h a d o w H a w k C o n d o s SE 1 2 t h S t r e e t & H a r r i n g t o n Pl a c e S E RH 3 9 5 R H 5 9 0 G 5 3 7 W - 2 9 0 0 3 12 296.0 50 E a s t o f 4 1 2 7 W e l l s A v e N KD 2 1 8 K D 3 2 0 C 4 4 2 W - 3 3 3 0 2 . 5 10 33.3 51 N 4 2 n d P l a c e & N 4 3 r d S t r e e t KD 2 1 8 K D 3 2 0 B 4 4 3 W - 3 3 3 0 2 . 5 10 32.0 53 2 6 1 0 L y n w o o d A v e N E Co a l C r e e k UD 44 0 HL D 5 6 5 D 5 8 7 W - 3 4 5 5 8 346.5 December 2012 2-30 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx The following list provides additional information on PRV stations that are no longer in operation:  PRV Stations 17, 18, 19, 20, 21, and 33 were put on inactive status (zone valves opened; PRVs set to wide open) in 2001 as part of the reconfiguration of the Rolling Hills 490 and 590 Zones following the completion of the Rolling Hills 3-MG Reservoir and BPS project (W-2230).  PRV Station 11 was removed in 1995 (W-2126).  PRV Station 15 was removed in 1992.  PRV Station 27 was removed in 1992.  PRV Station 42 was removed in 2000. 2.2.5 Interties and Emergency Supply Sources The City maintains several emergency supply sources. These sources consist of one emergency well, EW-3, and several interties. All of the City's interties, regular and emergency supply, are shown in Table 2.3. The City has 10 interties as defined by RCW 90.03.383 (use prior to January 1, 1991) plus three emergency interties. Notices of the 10 interties were submitted to the Washington State Department of Ecology and Washington State Department of Health in May 1992 and then again in June 1996. Copies of all of the City's intertie and emergency supply agreements are included in Appendix D. 2.2.6 Distribution System The City’s water pipelines are shown in plan view in Figure 2.1. Tables 2.9a, 2.9b, and 2.9c summarize the length of mains in the water system by diameter, pressure zone, material, and age. December 2012 2-31 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx Ta b l e 2 . 9 a P i p e I n v e n t o r y – L e n g t h b y D i a m e t e r a n d Z o n e Di a m e t e r (i n ) VL Y 1 9 6 Ma p l e w o o d 79 ( f t ) Ke n n y d a l e 21 8 & 3 2 0 ( f t ) Hi g h l a n d s 43 5 ( f t ) Hi g h l a n d s 56 5 ( f t ) We s t H i l l Zo n e s ( f t ) Ro l l i n g H i l l s & T a l b o t H i l l Zones (ft) Total Length (ft) < 4 4 7 7 3 2 9 2 , 2 2 7 2 7 7 1 , 9 6 2 9 5 5 6 , 2 2 7 4 1 2 , 0 0 2 1 , 4 1 4 1 6 , 8 6 6 1 7 , 7 6 3 3 , 7 3 0 1 9 , 8 7 7 7 1 , 6 5 2 6 3 7 , 3 8 3 5 , 8 6 0 3 7 , 8 1 5 6 4 , 0 2 9 1 0 , 2 8 4 4 4 , 7 4 2 2 0 0 , 1 1 4 8 8 2 , 9 1 8 4 5 , 3 1 5 8 2 , 9 5 0 2 0 0 , 7 8 2 3 6 , 4 4 7 1 0 4 , 9 3 8 5 5 3 , 3 4 9 10 7 1 , 8 0 6 1 5 , 8 3 5 1 4 , 9 3 5 4 8 , 1 9 8 3 , 4 4 9 2 1 , 1 3 9 1 7 5 , 3 6 3 12 2 1 2 , 7 4 8 7 8 , 0 8 0 2 6 , 7 1 6 6 0 , 7 0 5 1 7 , 5 7 1 6 9 , 8 7 7 4 6 5 , 6 9 6 14 1 , 2 0 6 0 7 3 6 0 0 0 1 , 9 9 6 16 4 6 , 1 4 2 1 , 7 0 0 3 0 , 1 1 4 1 2 , 1 9 7 1 9 5 1 3 , 5 1 8 1 0 3 , 8 6 6 18 4 , 4 6 3 0 0 0 0 0 4 , 4 6 3 20 1 , 5 5 6 0 0 0 0 2 , 0 9 0 3 , 6 4 6 24 2 0 , 8 0 9 0 5 9 8 0 0 3 9 8 2 1 , 8 0 5 42 9 0 0 0 0 0 0 0 9 0 0 Zo n e t o t a l s 4 9 2 , 4 1 0 1 4 8 , 5 3 3 2 1 2 , 9 5 7 4 0 3 , 9 5 1 7 3 , 6 3 8 2 7 7 , 5 3 4 1 , 6 0 9 , 0 7 7 Ta b l e 2 . 9 b P i p e I n v e n t o r y – L e n g t h b y D i a m e t e r a n d M a t e r i a l Di a m e t e r ( i n ) A s b e s t o s Ce m e n t ( f t ) Ca s t I r o n ( f t ) D u c t i l e I r o n ( f t ) P l a s t i c ( f t ) S t e e l ( f t ) T o t a l L e n g t h (ft) <4 3 5 4 2 7 3 4 1 6 2 6 2 4 , 9 2 2 6 , 2 2 7 4 1 , 7 6 0 4 3 , 2 1 7 1 9 , 2 6 1 0 7 , 4 1 5 7 1 , 6 5 2 6 4 , 8 8 8 1 4 8 , 4 3 9 2 6 , 9 0 5 0 1 9 , 8 8 2 2 0 0 , 1 1 4 8 5 , 3 8 6 1 2 1 , 1 8 5 4 2 0 , 7 2 2 0 6 , 0 5 6 5 5 3 , 3 4 9 December 2012 2-32 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx Ta b l e 2 . 9 b P i p e I n v e n t o r y – L e n g t h b y D i a m e t e r a n d M a t e r i a l Di a m e t e r ( i n ) A s b e s t o s Ce m e n t ( f t ) Ca s t I r o n ( f t ) D u c t i l e I r o n ( f t ) P l a s t i c ( f t ) S t e e l ( f t ) T o t a l L e n g t h (ft) 10 0 2 4 , 4 9 1 1 5 0 , 8 3 7 0 3 4 1 7 5 , 3 6 3 12 8 , 1 0 6 7 9 , 0 6 8 3 7 3 , 0 0 1 1 , 7 4 1 3 , 7 8 1 4 6 5 , 6 9 6 14 0 1 , 9 4 8 8 0 4 0 1 , 9 9 6 16 1 4 7 1 8 , 3 6 6 8 3 , 8 9 4 1 , 0 8 1 3 7 7 1 0 3 , 8 6 6 18 0 3 , 5 6 1 8 6 2 0 4 0 4 , 4 6 3 20 0 0 3 , 6 4 6 0 0 3 , 6 4 6 24 0 0 2 1 , 8 0 5 0 0 2 1 , 8 0 5 42 0 0 0 0 9 0 0 9 0 0 Ma t e r i a l t o t a l s 2 0 , 6 4 1 4 4 0 , 5 4 8 1 , 1 0 1 , 3 5 7 3 , 0 8 4 4 3 , 4 4 7 1 , 6 0 9 , 0 7 7 Ta b l e 2 . 9 c P i p e I n v e n t o r y – L e n g t h b y M a t e r i a l a n d A g e Ma t e r i a l B e f o r e 19 5 0 ( f t ) 19 5 0 – 19 5 9 ( f t ) 19 6 0 – 19 6 9 ( f t ) 19 7 0 – 19 7 9 ( f t ) 19 8 0 – 19 8 9 ( f t ) 19 9 0 – 19 9 9 ( f t ) 2000 -2010 (ft) Total Length (ft) As b e s t o s Ce m e n t 64 6 1 4 , 1 6 0 3 , 9 9 4 9 1 1 , 7 3 2 1 6 0 2 0 , 6 4 1 Ca s t I r o n 9 5 , 6 7 2 2 3 , 3 2 7 2 2 1 , 7 1 7 9 3 , 6 1 4 6 , 0 4 4 1 7 3 0 4 4 0 , 5 4 9 Du c t i l e I r o n 0 0 1 6 , 0 4 9 1 7 0 , 8 8 8 3 4 2 , 9 4 0 3 0 4 , 3 9 8 2 6 7 , 0 8 3 1 , 1 0 1 , 3 5 7 Pl a s t i c 0 0 0 0 7 5 7 0 2 , 3 2 7 3 , 0 8 4 St e e l 4 , 0 4 6 1 6 , 8 8 1 2 0 , 0 2 8 2 6 8 3 2 7 5 4 1 , 8 4 2 4 3 , 4 4 7 To t a l b y de c a d e 10 0 , 3 6 4 5 4 , 3 6 8 2 6 1 , 7 8 8 2 6 4 , 8 6 1 3 5 1 , 8 0 0 3 0 4 , 6 4 1 2 7 1 , 2 5 2 1 , 6 0 9 , 0 7 8 December 2012 2-33 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx Transmission capability for the system is primarily provided by 12-inch, 16-inch, and 24- inch diameter pipelines from the wellfields located in Liberty Park, Cedar River Park, and the Maplewood Golf Course to various points within the service area. Since approximately 96 to 97 percent of the system’s supply is provided from the wellfields, major transmission facilities are required in the Valley 196 Zone to ensure adequate water distribution throughout the service area. As shown in Figure 2.1, the transmission pipelines are located primarily along the major transportation corridors. The looped 8-inch pipelines in the well- developed residential areas of the system also provide some transmission capability. Transmission pipelines in the Valley 196 Zone predominantly run north to south, supplying the downtown business pressure zone, the Green River Valley industrial complexes, and the BPS that serve the other areas of the system. East-west pipelines that connect to the north-south transmission mains also provide additional transmission capacity. The pipe loops or grids formed by these connections help to increase system reliability and capacity throughout the system. Transmission pipelines from the Maplewood wellfield carry finished water to the Highlands and Rolling Hills Zones. Both transmission pipeline routes follow unimproved corridors and steep slopes. A high-pressure fire loop (320-foot hydraulic grade line) encompasses a high-risk area of the industrial sector near the Paccar and Boeing plants for improved fire protection. For areas on the eastern side of the valley, the topography of the terrain dictates that the transmission corridors run in a north-south orientation within each pressure zone and in a west-east orientation between the different pressure zones. The transmission corridor in the West Hill area runs east and west from the West Hill Pump Station to the reservoir and north and south on 84th Avenue S. A separate transmission route connects the reservoir with Skyway Water and Sewer District. Looped 8- and 6-inch distribution mains provide a large percentage of the transmission capacity in the West Hill area. Transmission mains generally convey water between the supply sources (reservoirs or wells) to the local distribution grid where it is conveyed to the source of the demand. Ideally, minimal head losses should occur in transmission pipelines during normal demand periods, allowing these mains to also convey fire demands to the distribution system and to meet other emergencies without experiencing adverse head losses. Figure 2.1 also presents all the smaller pipelines below 12 inches in diameter that convey water from the transmission grid to the individual service connections. A distribution system functions by meeting individual demands in the immediate vicinity via branching and looping pipelines through the service area. Under normal conditions, the velocity of water in transmission and distribution mains should be less than 5 feet per second (fps) during peak demand periods, and less than 8 fps during fire demands periods. December 2012 2-34 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx Velocities in excess of 8 fps may produce unacceptable thrust forces in underground fittings and cause excessive pipe wear or failure. Therefore, limiting velocity to less than 8 fps has been adopted by the City as a design criteria. The transmission and distribution system is comprised of water mains of four different materials: asbestos cement (AC), steel (ST), ductile iron (DI), and cast iron (CI). Current City policy is to replace all AC and ST water mains in the system as the budget permits, since transmission lines made of these materials are prone to leakage and failure. Table 2.10 summarizes the water main replacements the City has done since 2003. Table 2.10 Water Main Replacements Since 2003 Year Length (ft) Diameter and Material Before Replacement New Diameter and Material Project No. 2004 48 8 CI 8 DI W-2959 2004 1,491 4 CI 4, 8, 12 & 18 DI W-2960 2004 4,313 6 ST 6 & 8 DI W-3078 2004 5,319 4 & 6 CI 4, 6 & 8 DI W-3142 2005 5,076 4 & 6 CI 4 & 8 DI W-3198 2006 1,235 4 & 6 ST 8 DI W-3537 2006 2,120 4 AC & 6 ST 8 DI W-3287 2007 1,588 4 & 6 CI 12 DI W-2988 2007 265 12 DI 12 DI W-3223 2007 1,880 16 CI 16 DI W-3344 2008 900 8 CI 12 DI W-2952 2009 1,800 8 CI 12 DI W-3179 2009 313 8 CI 12 DI W-3224 2009 2,002 4 & 6 CI 8 & 12 DI W-3362 2009 1,236 4 & 6 CI 8 DI W-3537 2010 7,181 4 & 6 CI 8 DI W-3080 Other future distribution improvements are discussed in Chapter 9, Capital Improvement Program. December 2012 2-35 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx 2.2.7 Source Treatment Renton chlorinates all of its sources for the purpose of secondary disinfection. The target dose is 0.8 milligrams per liter (mg/L). Additionally, Wells RW-1, RW-2, and RW-3 are provided with primary disinfection. The water from Wells PW-11, PW-12 and PW-17 is also provided with primary disinfection as a result of the treatment process to remove the ammonia from the raw water. The City began chlorinating its drinking water in 1976. See section 2.2.1, Source of Supply for further information. The City began fluoridating its drinking water in 1986. The target dose is 1.0 mg/L. All sources, except Wells PW-8, PW-9, PW-11, PW-12, and PW-17, have the fluoride saturation and metering equipment located in the well house. Wells PW-8 and PW-9 are served by the Fluoridation Building, which is located next to Well PW-8. This building also serves a storage facility for bagged sodium fluoride. Fluoridation for Wells PW-11, PW-12, and PW-17 occurs at a central location – the Maplewood BPS and Treatment Building. Section 2.2.1 Source of Supply describes these facilities in greater detail. In 1999, the City began treating the water from the downtown wells and Springbrook Springs with sodium hydroxide to raise the pH of the water. The purpose for doing this is to make the water less corrosive and to comply with the Lead & Copper Rule. A central storage and meter facility was constructed in Cedar River Park. From this facility, diluted sodium hydroxide is fed to each of the downtown wells via HDPE pipes. Springbrook Springs has its own storage and metering system. Section 2.2.1 Source of Supply provides further information regarding the treatment of water from the Maplewood Wellfield. 2.2.8 Telemetry and SCADA The telemetry and system control and data acquisition (SCADA) systems for the water system have changed over the years with the changes in technology that is available for the purpose. The following is a brief description of the current system. Certain aspects of operation and capability are not discussed for security reasons. Each site (all sources, all booster pump stations, all reservoirs, all treatment facilities, Boeing Longacres Intertie, Skyway Wholesale Meter, Dimmitt BPS, Coal Creek emergency intertie) has a remote telemetry unit (RTU) that in some cases also serves as a programmable logic controller (PLC). Information about the site is forwarded from the site to the master telemetry unit (MTU) that is located at the Water System Control Room (City Shops Administration Building). The MTU sends information and instructions back to the RTUs. Signals between the RTUs and MTU travel either by dedicated phone lines or by radio waves. At the Water System Control Room the operations staff monitor (and in some cases control) the system using a Human Machine Interface (HMI). The HMI is a PC running software that communicates with the MTU and can display information. The HMI December 2012 2-36 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 2/Ch02.docx computer also runs an auto-dialer application (Win 911) that calls a 24-hour manned call service and/or water shop stand-by staff. There is a back-up auto-dialer that is used in the event the HMI computer or MTU fails. Each RTU, the MTU, and the HMI computer have various levels of back-up power and redundancy. Various analog (e.g., flow rate, water elevation), discrete (e.g., pump status), and alarm information is stored in a SQL Server database for historical and analysis purposes. December 2012 3-1 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Ch_03 Chapter 3 PLANNING DATA AND WATER DEMAND FORECASTS This chapter summarizes the existing and projected water requirements for the City water distribution system. Projecting a realistic future water demand is necessary for planning infrastructure projects and securing adequate water supply to meet future growth. Current water requirements are documented in this chapter based on historical water use as recorded by the City. 3.1 POPULATION AND DEMOGRAPHIC TRENDS Current and projected future demographic trends were developed for the City’s RWSA based on data provided in the PSRC’s Population, Households, and Employment Forecast database. The PSRC Population, Households, and Employment Forecast database contains historical and future year estimates of key demographic and employment values for the Puget Sound region by forecast analysis zone (FAZ). FAZs are the geographic units used by the PSRC to report its small area forecasts of population, households, and employment. They are built up from traffic analysis zones (TAZs), with each FAZ containing between 1 to 20 TAZs. Data provided in the PSRC database is available in ten-year increments, starting with 1980 and extending through 2040. The City’s RWSA and pressure zone boundaries do not coincide with the PRSC FAZ boundaries. Therefore, the City allocated the key demographic and employment variables (total households, total population, total employment) to each pressure zone within the RWSA using geographic information system (GIS) techniques. Additional data used to develop the demographic projections by pressure zone for the RWSA includes the City’s list of vacant parcels within the RWSA, City zoning designations, the City’s Buildable Lands database, the Boeing Renton Environmental Impact Statement (EIS), and the Sunset Area Community Planned Action EIS. Appendix I contains a detailed description of the methodology used to develop the demographic projections. This section summarizes the information presented in Appendix I. 3.1.1 Historical Population and Demographics Table 3.1 summarizes the current population, as well as the number of households and employees in the RWSA, based on data from the PSRC. December 2012 3-2 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Ch_03 Table 3.1 Historical Demographics Year Population Households Employees 1980 35,226 14,138 34,829 1990 42,442 18,069 43,794 2000 49,633 21,260 50,033 2010 54,351 23,704 53,102 Notes: 1. Source: Based on population, household, and employment estimates from PSRC. 3.1.2 Population and Demographic Forecasts Table 3.2 summarizes the population and demographic forecasts for the RWSA. The forecasts were developed based on the projections developed by the PSRC, the City’s list of vacant parcels within the RWSA, the City’s Buildable Lands database, the Boeing Renton EIS, and the Sunset Area Community Planned Action EIS. Boeing plans to consolidate its Renton Plant, located in North Renton adjacent to Lake Washington, opening up 75 acres for redevelopment near The Landing. The Sunset Area Community Revitalization Project is centered around NE Sunset Blvd and Harrington Ave NE. Table 3.2 Demographic Projections Year Population Households Employees 2011 54,824 24,030 54,688 2012 55,296 24,355 56,125 2013 55,769 24,680 57,516 2014 56,242 25,006 58,873 2015 56,715 25,331 60,221 2016 57,214 25,679 61,023 2017 57,714 26,027 61,825 2021 59,713 27,418 65,039 2031 64,503 30,770 73,097 2041 67,434 32,963 83,349 2051 70,364 34,865 89,366 2061 73,294 36,768 95,382 2071 76,125 38,587 101,392 It should be noted that there is very little vacant land within the City’s current RWSA. Therefore, the growth capacity within the City’s RWSA is limited. The majority of future growth is projected to occur within the Regional Urban Center and the Sunset Area Community Planned Action redevelopment boundaries. Therefore, the rate of growth of these redevelopment areas affects the projected build out date of the RWSA. Per City staff, the Regional Urban Center is not expected to be fully built out until the 2070 time frame. December 2012 3-3 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Ch_03 Build out of the Sunset Area is assumed to occur by 2030, based on the Sunset Area Community Planned Action EIS. 3.2 HISTORICAL CONNECTIONS AND WATER USE This section summarizes the historical number of connections and water use per customer class from 2004 to 2009. The historical data are used to determine the average water use per connection for each customer class, which forms the basis for the development of future average water demand projections. 3.2.1 Historical Service Connections From 2004 through 2009, the total number of City retail water service connections increased by 8.2 percent. As of the end of 2009, the City provided water to 16,782 connections. Table 3.3 shows the historical number of connections per customer class. Table 3.3 Historical Service Connections Number of Connections by Year1 Connection Type 2004 2005 2006 2007 2008 2009 2010 Residential Single-family 12,22012,56712,85513,11313,220 13,26013,277 Multi-family 1,535 1,541 1,542 1,546 1,551 1,557 1,557 Non-Residential Commercial 991 1,015 1,024 1,047 1,082 1,092 1,092 Industrial 74 74 74 74 74 74 74 Government 80 80 81 83 88 92 92 Irrigation 604 629 645 663 689 703 704 Other Skyway Wholesale 1 1 1 1 1 1 1 SPU to Boeing 2 2 2 2 2 2 2 King County WWTP 1 1 1 1 1 1 1 Total Connections 15,50815,91016,22516,53016,708 16,78216,800 Notes: 1. Number of connections based on records provided by City staff. Number of connections is based on end of the year numbers, except for 2010, which is based on the number of connections as of June. Based on the data provided in Table 3.3, the following is noted: December 2012 3-4 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Ch_03  Single-family Connections: Single-family connections accounted for 79 percent of connections in the RWSA in 2009. From 2004 through 2009, single-family connections increased by 1,040 connections, which is roughly nine percent.  Multi-family Connections: Multi-family connections accounted for nine percent of connections in the RWSA in 2009. From 2004 through 2009, multi-family connections increased by 22 connections, or roughly 1.4 percent.  Commercial Connections: Commercial connections accounted for seven percent of connections in the RWSA in 2009. From 2004 through 2009, commercial connections increased by 101 connections, or roughly ten percent.  Industrial Connections: Industrial connections accounted for less than one percent of connections in the RWSA in 2009. There was no growth in the number of industrial connections from 2004 through 2009.  Government Connections: Government connections accounted for less than one percent of connections in the RWSA in 2009. From 2004 through 2009, government connections increased by 12 connections, or roughly 15 percent.  Irrigation Connections: Irrigation connections accounted for roughly four percent of connections in the RWSA in 2009. From 2004 through 2009, irrigation connections increased by 99 connections, or roughly 16 percent.  Other Connections - Wholesale & Large Water Users: The City supplies wholesale water to the Skyway Water and Sewer District through one connection located in the West Hill 495 Pressure Zone. In addition, some water is purchased from SPU and sold to the Boeing Plant Area. This water is measured through two connections at the Boeing Plant. The City also provides water to the King County Wastewater Treatment Plant (WWTP) through one commercial water connection. Because the King County WWTP in considered a “large user,” it has been subtracted out of the commercial connections throughout this chapter. 3.2.2 Historical Source Production The City produces water for its customers primarily through its wells and through Springbrook Springs. The City also purchases water from SPU to help serve the Boeing Plant Area. Table 3.4 lists the total water produced from 2004 through 2009 by supply source. The annual production ranged from 3,617,002 ccf in 2005 to a high of 3,959,812 ccf in 2007. The total water production in 2009 was 3,707,785 ccf. Figure 3.1 shows the average production percentage by active source for 2004 through 2009. As shown on this figure, the largest City supply sources from 2004 to 2009 were Wells RW-1, RW-2, and RW-3. These three wells accounted for 67 percent of water produced by the City during that period. Other major sources of supply in the City from 2004 through 2009 included Springbrook Springs and Well PW-8, which accounted for 16 percent and 9 percent of the total water produced during that period, respectively. The December 2012 3-5 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Ch_03 remaining 8 percent consisted of the other City wells, as well as the water purchased from SPU. Table 3.4 Historical Annual Water Production by Source Annual Production Per Year (CCF)1 Active Source2 2004 2005 2006 2007 2008 2009 Springbrook Springs 463,580 455,179 590,362 767,993 697,931 660,755 Well EW-3 2,616 4,241 832 2,103 17,832 1,493 Wells RW-1, RW-2, & RW-3 2,859,415 2,383,724 2,885,362 2,394,929 2,342,399 2,260,082 Well PW-8 375,200 410,312 389,301 517,439 186,705 205,597 Well PW-9 34,913 311,706 9,216 8,368 63,942 14,821 Well PW-11 0 0 87 17,793 10,919 6,744 Well PW-12 0 0 3,589 165,121 20,925 71,285 Well PW-17 0 0 22,509 34,107 274,604 444,518 Purchased from SPU 64,549 51,841 48,318 51,959 38,125 42,490 Total 3,800,274 3,617,002 3,949,575 3,959,812 3,653,382 3,707,785 Notes: 1. Historical water production data provided by City staff. 2. Non active sources include the Cedar River supply source Well 4, Well RW-5, and Well PW-10. 3.2.3 Historical Water Consumption by User Class Table 3.5 summarizes the total retail water consumption by customer class from 2004 through 2009. Table 3.5 also lists the other authorized water use, such as water used for construction, and the calculated unaccounted-for water from 2004 to 2009. Although the total number of City connections has increased from 2004 to 2009 (according to Table 3.3), the total retail water consumption in 2009 was slightly less than the total retail water consumption in 2004. From 2004 to 2009, the total water consumption fluctuated from 6.0 mgd in 2008 to 6.54 mgd in 2004. Water use patterns are analyzed using the amount of consumption per customer class. Figure 3.2 depicts the average percentage of each type of customer class in terms of number of accounts from 2004 to 2009, and presents the percentages of water sold by customer class from 2004 to 2009. Sp r i n g b r o o k S p r i n g s 16 % EW - 3 0% We l l P W - 8 9% We l l P W - 9 2% We l l P W - 1 1 0% We l l P W - 1 2 1% We l l P W - 1 7 4% Pu r c h a s e d f r o m S e a t t l e 1% Sp r i n g b r o o k S p r i n g s 16 % EW - 3 0% Wells RW-1, RW-2, & RW-3 67% We l l P W - 8 9% We l l P W - 9 2% We l l P W - 1 1 0% We l l P W - 1 2 1% We l l P W - 1 7 4% Pu r c h a s e d f r o m S e a t t l e 1% Fi g u r e 3 . 1 Av e r a g e W a t e r P r o d u c t i o n by S o u r c e ( 2 0 0 4 t o 2 0 0 9 ) Wa t e r S y s t e m P l a n U p d a t e Ci t y o f R e n t o n December 2012 3-7 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Ch_03 Ta b l e 3 . 5 H i s t o r i c a l W a t e r C o n s u m p t i o n b y C u s t o m e r C l a s s R e s i d e n t i a l 1 N o n - r e s i d e n t i a l 1 O t h e r 1 To t a l Co n s u m p t i o n 1 Total Production2Unaccounted-for Water3 Si n g l e - fa m i l y Mu l t i - fa m i l y Co m m . I n d u s t r i a l G o v . I r r i g . Sk y w a y Wh o l e s a l e SP U t o Bo e i n g Ki n g Co u n t y WW T P Ot h e r Au t h o r i z e d Ye a r ( m g d ) ( m g d ) ( m g d ) ( m g d ) (m g d ) ( m g d ) ( m g d ) ( m g d ) ( m g d ) (m g d ) ( m g d ) ( m g d ) ( m g d ) ( % ) 20 0 4 2 . 1 5 1 . 4 6 1 . 1 0 0 . 1 8 0 . 17 0 . 8 8 0 . 1 7 0 . 1 3 0 . 2 4 0. 0 7 6 . 5 4 7 . 7 7 1 . 2 3 1 5 . 8 % 20 0 5 2 . 1 0 1 . 4 6 1 . 1 8 0 . 1 1 0 . 11 0 . 7 5 0 . 1 5 0 . 1 1 0 . 2 3 0. 0 4 6 . 2 4 7 . 4 1 1 . 1 7 1 5 . 8 % 20 0 6 2 . 2 8 1 . 4 3 1 . 2 1 0 . 1 5 0 . 12 0 . 9 3 0 . 1 7 0 . 1 0 0 . 2 1 0. 0 4 6 . 6 2 8 . 0 9 1 . 4 7 1 8 . 2 % 20 0 7 2 . 2 6 1 . 4 1 1 . 2 5 0 . 1 0 0 . 11 0 . 8 5 0 . 1 6 0 . 1 1 0 . 1 8 0. 0 5 6 . 4 8 8 . 1 2 1 . 6 4 2 0 . 2 % 20 0 8 2 . 1 7 1 . 4 0 1 . 1 3 0 . 1 1 0 . 12 0 . 6 3 0 . 1 5 0 . 0 8 0 . 1 8 0. 0 3 6 . 0 0 7 . 4 7 1 . 4 7 1 9 . 7 % 20 0 9 2 . 2 5 1 . 4 2 1 . 0 5 0 . 1 0 0 . 11 0 . 9 4 0 . 1 5 0 . 0 7 0 . 1 6 0. 0 4 6 . 2 9 7 . 6 0 1 . 3 1 1 7 . 2 % Av g . 2 . 2 0 1 . 4 3 1 . 1 5 0 . 1 2 0 . 1 2 0 . 8 3 0 . 1 6 0. 1 0 0 . 2 0 0. 0 4 6 . 3 6 7 . 7 4 1 . 3 8 1 7 . 8 % No t e s : 1. Mo n t h l y w a t e r c o n s u m p t i o n d a t a b y c u s t o m e r t y p e w a s p r o v i d e d b y C i t y s t a f f i n t h e u n i t s o f c c f . T h e s e d a t a w e r e c o n v e r t e d i n t o an a n n u a l a v e r a g e p e r cu s t o m e r t y p e , i n t h e u n i t s o f m g d . S P U w a t e r t o B o e i n g , a n d K i ng C o u n t y W W T P w a t e r d a t a w e r e p r o v i d e d s e p a r a t e l y b y t h e C i t y . These data were su b t r a c t e d o u t o f t h e c o m m e r c i a l a n d i n d u s t r i a l c o n s um p t i o n d a t a f o r t h e p u r po s e s i n t h i s c h a p t e r . 2. To t a l p r o d u c t i o n d a t a w e r e p r o v i d e d b y C i t y s t a f f i n t h e u n i t s of c c f f o r 2 0 0 4 - 2 0 0 9 , i n c l u d i n g w e l l / s p r i n g w a t e r a n d S e a t t l e pu r c h a s e d w a t e r . T h e s e d a t a w e r e co n v e r t e d t o a n a n n u a l a v e r a g e , i n t h e u n i t s m g d . 3. Un a c c o u n t e d - f o r W a t e r i s t h e T o t a l P r o d u c t i o n - T o t a l C o n s u m p t i o n . D O H a l s o c a l l s t h i s “ D i s t r i b u t i o n S y s t e m L e a k a g e . ” P e r c e n t a g e is expressed in relation to To t a l P r o d u c t i o n . Single FamilyGovernment Irrigation 13% Other 8% Percent Consumed by Customer Class (2004 -2009) Single Family 79% Multi Family 10% Commercial 6% Industrial 0.45% Government 0.52%Irrigation 4% Other 0.02% Percent of Retail Accounts by Customer Class (2004 -2009 Avg.) Single Family 35% Multi Family 22% Commercial 18% Industrial 2% Government 2% Irrigation 13% Other 8% Percent Consumed by Customer Class (2004 -2009) Figure 3.2 Water Consumption Percentage by Customer Class (2004 to 2009) Water System Plan Update City of Renton Single Family 79% Multi Family 10% Commercial 6% Industrial 0.45% Government 0.52%Irrigation 4% Other 0.02% Percent of Retail Accounts by Customer Class (2004 -2009 Avg.) December 2012 3-9 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Ch_03 As shown in Figure 3.2, single-family residential customers made up 79 percent of total system connections, but only consumed 35 percent of total retail water sales. The multi- family residential customer class accounted for 10 percent of system connections and 22 percent of water use. Commercial users account for 6 percent of all system connections and use 18 percent of all water consumed. Industrial customers account for less than one percent of system connections and two percent of water use. While only four percent of the total number of accounts, irrigation use accounted for 13 percent of total water used. Wholesale water to Skyway, SPU water to Boeing, and water consumption at the King County WWTP site accounted for roughly eight percent of the City’s consumption. Figure 3.3 presents the total water consumed by customer class from 2004 to 2009. Other authorized demands and unaccounted-for water are discussed in Sections 3.4 and 3.5. 3.2.4 Average Day, Maximum Day, and Peak Hour Demands The City’s production data, which accounts for all water demand, was used to calculate the ADD and MDD for each year from 2004 to 2009 (Table 3.6). 3.2.4.1 Average Day Demand The ADD is calculated by dividing the total water produced and purchased by the number of days per year (2004 and 2008 were leap years and include 366 days per year). These values for the years 2004 to 2009 are presented in Table 3.6. As shown in this table, the ADD fluctuated between 7.41 mgd in 2005 to 8.12 mgd in 2008. 3.2.4.2 Maximum Day Demand Identifying the MDD is critical for establishing system supply capability, pump station discharge rates, reservoir capacity, and pump sizes. Historical values of MDD are equivalent to the highest production and purchase in one day in a given year, and are usually during the summer when irrigation is occurring. Table 3.6 presents these historical values. Similar to the ADD, the MDD from 2004 through 2009 fluctuated between 12.75 mgd in 2008 to 15.27 mgd in 2006. In order to develop future MDD projections, the historical MDD to ADD peaking factor is used. As with the MDD, the peaking factor fluctuates each year. As shown in Table 3.6, the MDD to ADD peaking factor fluctuated between 1.71 in 2008 and 1.95 in 2009. The average MDD peaking factor of 1.83 shown is used in this plan to project the future MDD. 3.2.4.3 Peak Hour Demand The Peak Hour Demand (PHD) is the highest water demand during any one-hour period of the year, and can be expressed as a multiplier applied to the ADD and/or as a multiplier applied to the MDD. 0. 8 1. 2 1. 6 2. 0 2. 4 Water Consumed (mgd) Fi g u r e 3 . 3 Hi s t o r i c a l A n n u a l W a t e r C o n s u m e d Wa t e r S y s t e m P l a n U p d a t e Ci t y o f R e n t o n 0. 0 0. 4 0. 8 1. 2 1. 6 2. 0 2. 4 20 0 4 2 0 0 5 20 0 6 20 0 7 20 0 8 2009 Water Consumed (mgd) Ye a r Si n g l e F a m i l y Mu l t i F a m i l y Co m m e r c i a l In d u s t r i a l Go v e r n m e n t Ir r i g a t i o n Sk y w a y W h o l e s a l e Mi s c . SP U t o B o e i n g Ki n g C o u n t y W W T P December 2012 3-11 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Ch_03 Table 3.6 Historical Average and Maximum Day Demand Year Annual Production (ccf) Average Day Demand (mgd) Max. Day Demand (mgd) Date of Max. Day Demand Max. Day/Avg. Day Peaking Factor 2004 3,800,274 7.77 14.25 7/23/04 1.83 2005 3,617,002 7.41 13.02 8/12/05 1.76 2006 3,949,575 8.09 15.27 7/24/06 1.89 2007 3,959,812 8.12 14.75 7/11/07 1.82 2008 3,653,382 7.47 12.75 8/16/08 1.71 2009 3,707,785 7.60 14.81 7/29/09 1.95 Average 3,781,305 7.74 14.14 - 1.83 SCADA data from July/August 2009 was used to develop representative diurnal variations in water demand for the City’s five water system operational areas during high demand conditions. The diurnal patterns, when applied to the MDD, yield a PHD for each operational area. More information related to the development of the operational area diurnal patterns and the PHD to MDD peaking factors is provided in Chapter 7. 3.2.5 Seasonal Variation in Consumption by Customer Class In order to better assess the City’s water use, an analysis was also performed on seasonal water use. Figure 3.4 depicts the variation in historical average monthly water consumption from 2004 to 2009. Figure 3.5 shows the variation of water use for each customer class throughout the year, which is based on the average monthly water use from 2004 through 2009. Note that many of the City’s customers are billed on a bimonthly basis. Therefore, the City’s consumption records for these customers are based on bimonthly readings. This accounts for the fluctuations in water consumption for customer classes with consistent water consumption throughout the year, such as commercial customers, on Figure 3.5. Based on water use patterns shown in Figure 3.5, summer was defined to be May through October and winter to be November through April. The average summer and winter consumption by customer class for 2004 to 2009 is shown in Table 3.7. These values can be used to project future water demand by season. For residential customers, the winter demand value is an indicator of base indoor use, and the summer demand value shows increased seasonal outdoor use. 4681012 Water Consumption (mgd) Av e r a g e M o n t h l y C o n s u m p t i o n ( 2 0 0 4 - 2 0 0 9 ) Fi g u r e 3 . 4 Av e r a g e M o n t h l y C o n s u m p t i o n , In c l u d i n g W h o l e s a l e ( 2 0 0 4 t o 2 0 0 9 ) Wa t e r S y s t e m P l a n U p d a t e Ci t y o f R e n t o n 024681012 Ja n F e b M a r A p r M a y J u n J u l A u g S e p O c t N o v D e c Water Consumption (mgd) Mo n t h Av e r a g e M o n t h l y C o n s u m p t i o n ( 2 0 0 4 - 2 0 0 9 ) 4,000 4,500 5,000 Mo n t h l y C o n s u m p t i o n b y U s e r T y p e Average Consumption per Account (2004 -2009) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 JanFebMarAprMayJunJulAugSepOctNovDec Mo n t h l y C o n s u m p t i o n b y U s e r T y p e ( m g d ) Month Average Consumption per Customer Type (2004 -2009) Single Family Multi Family Commercial Industrial Government Irrigation Figure 3.5 Average Seasonal Consumption by Customer Class (2004 to 2009) Water System Plan Update City of Renton 0 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 5,000 JanFebMarAprMayJunJulAugSepOctNovDec Mo n t h l y C o n s u m p t i o n b y U s e r T y p e (g p d / a c c o u n t ) Month Average Consumption per Account (2004 -2009) Single Family Multi Family Commercial Industrial Government Irrigation 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 JanFebMarAprMayJunJulAugSepOctNovDec Mo n t h l y C o n s u m p t i o n b y U s e r T y p e ( m g d ) Month Average Consumption per Customer Type (2004 -2009) Single Family Multi Family Commercial Industrial Government Irrigation December 2012 3-14 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Ch_03 Table 3.7 Seasonal Consumption by Customer Type (2004 - 2009) Average Winter Consumption1 Average Summer Consumption2 Summer/ Winter Ratio Customer Class (mgd)(gpd/account) (mgd)(gpd/account) Residential Single-family 1.87 145 2.54 197 1.36 Multi-family 1.41 911 1.46 946 1.04 Non-residential Commercial 1.09 1,043 1.23 1,182 1.13 Industrial 0.10 1,370 0.14 1,951 1.42 Government 0.10 1,226 0.15 1,743 1.42 Irrigation 0.11 169 1.54 2,344 13.8 Other Skyway Wholesale 0.14 -- 0.18 -- 1.27 SPU to Boeing 0.10 -- 0.10 -- 1.05 King County WWTP 0.21 -- 0.18 -- 0.87 Other Authorized 0.02 -- 0.06 -- 2.56 Total 5.15 -- 7.58 -- 1.47 Notes: 1. Average winter water consumption is from November through April. Total does not include unaccounted for water. 2. Average summer consumption is from May through October. Total does not include unaccounted for water. 3.3 EQUIVALENT RESIDENTIAL UNITS The demand of each customer class can be expressed in terms of ERUs for forecasting and planning purposes. One ERU is defined as the average quantity of water consumed by one average, full-time, single-family residence per day, and is calculated by dividing the average annual consumption of the single-family residential classification by the average number of single-family residential accounts for a given year. The quantity of water used by other customer classes, and by the whole system, can be expressed in terms of equivalent ERUs. The consumption per account for other customer classes is determined by dividing the average annual consumption per customer class by the number of accounts for that customer class. The ERU calculation does not include non- revenue water or distribution leakage. Table 3.8 provides the historical annual average water consumption by customer classification used to determine the ERU planning value. The historical data in Table 3.8 show an ERU water use that ranged from 164 to 176 gpd per single-family residential December 2012 3-15 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Ch_03 account for 2004 to 2009, with an average water use of 171 gpd. This is equivalent to saying that an average family in the City of Renton uses 171 gpd. Table 3.9 summarizes the historical number of ERUs by customer class for 2004 through 2009. The number of ERUs was calculated by multiplying average number of ERUs per account from 2004 through 2009 (provided in Table 3.8) by the historical number of accounts. The number of ERUs in 2009 totaled 35,490. 3.4 OTHER AUTHORIZED CONSUMPTION In addition to service connection meters, the City tracks authorized water use for other revenue and non-revenue demands. The City’s other authorized revenue consumption is mainly comprised of revenue water sold to contractors, which is measured by hydrant meters checked out to the contractor. Authorized non-revenue water use includes metered water use read on fire service detector meters. These other authorized uses are reported as “Miscellaneous” consumption in the City’s billing data. 3.5 UNACCOUNTED-FOR WATER Unaccounted-for water is defined as the difference between the total quantity of water produced/purchased from the City’s supply sources and the authorized consumption. The DOH defines this water as “Distribution System Leakage.” The City prefers to use the term “Unaccounted-for water” to reflect the fact that the discrepancy between water produced/purchased and authorized consumption may include losses other than those due to leakage, such as meter inaccuracy, water theft, and untracked authorized water use. By subtracting the total authorized water use from the total water produced or purchased, the unaccounted-for water is determined. The historical authorized use versus unaccounted-for water for 2004 to 2009 is presented in Table 3.10 and shown on Figure 3.6. The data shows an average quantity of unaccounted-for water of 17.8 percent from 2004 to 2009. The previous Water System Plan calculated a lower value of 14.4 percent between 1998 and 2003. In addition, the previous Water System Plan noted a downward trend in unaccounted-for water from 1998 to 2003. The City anticipates that much of its unaccounted-for water may come from meters that are stuck or calibrated incorrectly, incorrect meter reads, and errors in the billing system. The City reports occasionally having a long delay in accounting for new water customers in their billing data. Beginning in 2011, the City plans to deploy an automated meter reading (AMR) system over a period of five years. The AMR will improve the accuracy of the comparison of production to consumption and better detect stuck meters, meter tampering and water theft. December 2012 3-16 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Ch_03 Ta b l e 3 . 8 H i s t o r i c a l W a t e r C o n s u m p t i o n p e r A c c o u n t b y C u s t o m e r C l a s s R e s i d e n t i a l C o n s u m p t i o n 1 N o n - r e s i d e n t i a l C o n s u m p t i o n 1 S i n g l e - f a m i l y M u l t i - f a m i l y C o m m e r c i a l I n d u s t r i a l G o v e r n m e n t I r r i g a t i o n Ye a r ( g p d / a c c n t ) ( g p d / a c c n t ) ( g p d / a c c n t ) ( g p d / a c c n t ) ( g p d / a c c n t ) ( g p d / a c c n t ) 20 0 4 1 7 6 9 5 1 1 , 1 0 7 2 , 4 0 6 2 , 1 2 9 1 , 4 5 0 20 0 5 1 6 7 9 4 8 1 , 1 5 9 1 , 4 8 6 1 , 4 0 6 1 , 1 9 9 20 0 6 1 7 8 9 2 8 1 , 1 7 8 1 , 9 7 7 1 , 4 5 5 1 , 4 3 4 20 0 7 1 7 2 9 1 0 1 , 1 9 6 1 , 3 7 6 1 , 3 7 9 1 , 2 7 8 20 0 8 1 6 4 9 0 4 1 , 0 4 9 1 , 4 2 5 1 , 4 1 2 9 1 2 20 0 9 1 6 9 9 1 2 9 6 4 1 , 2 9 7 1 , 1 8 9 1 , 3 3 6 Av e r a g e 1 7 1 9 2 6 1 , 1 0 9 1 , 6 6 1 1 , 4 9 5 1 , 2 6 8 ER U s p e r A c c o u n t 2 1. 0 5 . 4 6 . 5 9 . 7 8 . 7 7 . 4 No t e s : 1. C o n s u m p t i o n p e r A c c o u n t = A n n u a l c o n s u m p t i o n ( g p d ) / N o . o f C o n n e c t i o n s 2. O n e E R U i s d e f i n e d a s t h e a v e r a g e w a t e r u s e p e r s i n g l e - f a m i l y a c c o u n t ( 1 7 1 g p d ) . December 2012 3-17 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Ch_03 Table 3.9 Historical Number of ERUs by Customer Class Residential ERUs1 Non-residential ERUs1 Year Single-family Multi-familyCommercialIndustrialGovernment IrrigationTotal 2004 12,220 8,303 6,422 718 699 4,476 32,838 2005 12,567 8,336 6,577 718 699 4,661 33,559 2006 12,855 8,341 6,636 718 708 4,780 34,038 2007 13,113 8,363 6,785 718 725 4,913 34,617 2008 13,220 8,390 7,011 718 769 5,106 35,214 2009 13,260 8,422 7,076 718 804 5,210 35,490 Notes: 1. Number of ERUs is calculated by multiplying the average number of ERUs per account as provided in Table 3.8 by the historical number of accounts. Calculation does not include unaccounted-for water, wholesale water, SPU water to Boeing, King County WWTP consumption, or other authorized water uses. Table 3.10 Historical Unaccounted-for Water Year Total Produced/ Purchased (MG) Authorized Consumption (MG) Unaccounted- for Water (MG) Unaccounted- for Water (%) 2004 2,843 2,394 449 15.8% 2005 2,706 2,277 428 15.8% 2006 2,954 2,416 538 18.2% 2007 2,962 2,365 597 20.2% 2008 2,733 2,196 537 19.7% 2009 2,774 2,296 478 17.2% Average 2,829 2,324 505 17.8% 2. 0 3. 0 4. 0 5. 0 6. 0 7. 0 8. 0 9. 0 Water Consumption (mgd) Un a c c o u n t e d f o r W a t e r To t a l C o n s u m p t i o n Fi g u r e 3 . 6 Hi s t o r i c a l A n n u a l W a t e r Pr o d u c t i o n v s . C o n s u m p t i o n Wa t e r S y s t e m P l a n U p d a t e Ci t y o f R e n t o n 0. 0 1. 0 2. 0 3. 0 4. 0 5. 0 6. 0 7. 0 8. 0 9. 0 20 0 4 20 0 5 20 0 6 20 0 7 20 0 8 2009 Water Consumption (mgd) Ye a r Un a c c o u n t e d f o r W a t e r To t a l C o n s u m p t i o n December 2012 3-19 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Ch_03 Other authorized non-revenue water use that is not currently tracked by the City may also contribute to the quantity of unaccounted-for water. Water used for street cleaning, pipe flushing, and reservoir maintenance are all types of authorized non-revenue water use that may not be currently tracked by the City. In accordance with Washington State requirements for systems with unaccounted-for water (or “distribution system leakage”) in excess of ten percent, the City prepared a Water Loss Control Action Plan (WLCAP). According to the WLCAP, the City’s current billing system was installed in 2004. Installation of the new software coincided with a significant increase from the downward trend in the calculated unaccounted-for water noted in the previous Water System Plan. An audit of the current system has not been performed. For this reason, it is not clear if the increase in unaccounted-for water is due to errors that existed in the previous billing system (that contributed to underreporting), or are now occurring with the new system. Five activities or areas of focus were identified in the WLCAP to address apparent and real distribution system losses within the City’s system. These include:  Revised reporting of authorized uses.  Metering for fire training activities and estimates of water use for fire fighting.  Water audit of Renton Park’s irrigation meters.  Audit of utility billing system.  Radio-read program for small customer meters. What is not known is the potential percent reduction in unaccounted-for water that could be achieved through implementation of activities associated with the five areas of focus identified in the City’s WLCAP. For planning purposes, it is prudent to assume the average unaccounted-for water from 2004 to 2009 of 17.8 percent when developing future water demand projections. Ultimately, however, the City’s goal is to reduce the amount of unaccounted-for water in the system to ten percent or less, as discussed in Chapter 4. 3.6 ZONING DESIGNATIONS Zoning designations and regulations provide important information in determining future water requirements. Zoning determines the area available for various types of development including both single-family and multi-family residential development, as well as commercial and other types of uses. Figure 3.7 shows the existing zoning designations for the RWSA. Zoning designations are governed by the City’s Comprehensive Plan. The population, household, and employment projections developed as part of this plan were coordinated with the City’s zoning designations for vacant parcels within the RWSA. The increase in the number of households and employees for each vacant parcel was December 2012 3-20 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Ch_03 determined using planning assumptions presented in the City’s Buildable Lands Database according to the parcel’s zoning designation. The total increase in households and employees was then summarized by pressure zone to calculate the “growth cap” for each pressure zone (i.e., the total number of households or employees than can be accommodated in each pressure zone). The projected PSRC growth rates were then applied to each pressure zone for households, employees, and population to determine the year in which each pressure zone is projected to build out (i.e., when the PSRC growth projection reaches the calculated growth cap). The Regional Urban Center and Sunset Planned Action area were considered separately based on information presented in their respective EISs. Small pockets of unincorporated King County reside within the RWSA. Most of these areas are zoned R-6/R-6-P by King County and are already fully developed with single-family dwellings. A few small areas are zoned by King County for higher density development. King County zoning was taken into consideration and is consistent with the methodology used in this Plan for determining demand projections. 3.7 PROJECTED NUMBER OF CONNECTIONS Future demand is directly related to projected growth in the RWSA. Growth projections for population, households, and employment were developed by pressure zone as summarized in Section 3.1.2. The population, household, and employment projections were converted into percentage growth rates for each pressure zone relative to the 2010 population, household, and employment values developed by the PSRC. Detailed tables with the overall growth rate in population, households, and employment by year for each pressure zone are included in Appendix I. The future number of connections per pressure zone were determined by multiplying the accounts in 2010 by the derived growth rates per zone. Residential accounts were multiplied by the total household growth rates. Commercial, industrial, and irrigation accounts were multiplied by the employment growth rates. The government accounts were projected using the total population growth rates. Table 3.11 summarizes the projected average annual growth rates by customer type through 2071. %&e(?è ?ç ?Å ?æ ?í Lake Washington Cedar River Green River Panther Lake Lake Boren Black River Forbay May Creek Lake Youngs Sp r i n g b r o o k C r e e k SR 167 Perimeter Rd NW Access Rdwy S 133rd St NE 31st St Sidney Ave N Perimeter Rd E S Puget Dr I-4 05 F wy SE 5th St 66th Ln S N 28th Pl N 33rd Pl BN Inc Rd East Valley Rd SR 169 Fir Ln 7 5t h Aly S P uget Dr S E S R 515 14 5 t h Ave S E 1 7 1 st W ay S 219th St SW 27th St SE 83rd Pl SE 180th St S 27th St S 184th St S 36th St 120th Pl SE I-405 Ra mp NE 27th St SE Jones Pl Costco Dr Forest Ave S NE 10th Ln S 32nd St SE 208th St SE 188th Way SE 4th Pl 126th Ave SE Pine Dr M on s ter R d S W SE 190th St Oakesdale Ave SW Jones Ave NE T h o m as L n S 182nd St S 133rd Pl A St S 126th St NE 10th Aly S 127th Pl 83rd Ave SE SE May Valley Rd SE 187th St 140th Way SE S 45th Pl 88th Ave S 121st Ave SE S 188th St N 41 st Pl 77th Ave SE SE 139th Pl N 38th St L a k e Yo u n g s S ervic e R d F ern d ale A ve S E Hillside Ln S Taft Aly S Tillicum St Lake Youngs Trl SR 181 SW G ra dy Way Access Rd 105th Ave SE SE 191st St N 8th St SE 82nd St Renton Dist Ct AcRd Ripley Ln N SW 43rd St High Ave NE SE 20 4th Wa y S 23rd St Interurban Trl 94th Pl S SE 107th Pl SE 168th St Eden Ln W 90th Ave SE S 114th St SW 34th St S 115th St S E 173rd St SE 204th Pl Lakemont Blvd SE S 117th St SR 167 Ramp Williams Ave S SE 60th St 120th Ter SE SE 133rd St 72nd Ave S 134th Ave SE SE 61st Pl SW 3rd Pl NE 22nd St 68th Ave S NE 12th St Pelly Aly N Rainier Ave N S 192nd St NE 26th St SE 181st St 132nd Ave SE Grant Aly S S 113th St 76th Ave S 118th Ave SE NE 43rd St S 28 th Ct SE 89th St S 55th St Pelly Ave N NE 24th St Treck Dr SE 188th St 84th Ave SE N 4th Aly A v alo n Pl SE 117th St SE 136th St SE 216th St Sperry Dr 63rd Ave S SE 131st St SW 41st St SE 132nd St SE 203rd Pl N P ark Dr S 122nd St NE 4th St Andover Park E SE 8th Pl Minkler Blvd SE 191st Pl SW 13th St NE 9th St Cedar Aly S S 206th Pl 78th Ave SE NE 2nd St S 200th St Nishiwaki Ln 122nd Pl SE SE 170th St S 210th St Qu i n c y A v e N E Hazelwood Ln S 125th St NE 10th Pl Oaksdale Ave SW SE 200th St Cedar River Trl SE 192nd St SE 65th St NE 36th St NE 21st Pl Moses Ln S S 199th Pl Blaine Ave NE SE 217th St SE 211th St 121st Pl SE Olympic Ave S S 204th St SE 161st Pl NE 10th St S 3rd Pl 69th Ave S SE 144th St S 47th St 129th Ave SE SE 113th Pl SE 220th Pl NW 3rd Ct 113th Ave SE SE 167th Pl NE 5th Pl 78th Ave S 1 3 3 r d A v e S E 143rd Pl SE SE 95th Way SE 120th St S 112th St SE 176th St S 216th St 70th Ave S SE 90 th S t 164th Ave SE SE 186th St S 196th St SE 128th St NE 7th Pl NE 8th St S E 6 2 nd St SE 113th St S 212th St SW 19th St S 127th St SE 196th St S E C arr R d S 19th St S 14th St SE 160th Pl 9 7th Pl S NE 8th Pl SE 147th St SE 160th St 133rd Pl SE 123rd Ave SE SE 142nd St B e a co n W ay S SE 162nd St Logan Ave N 100th Ave SE 152nd Ave SE 120th Ave SE 64th Ave S Lind Ave SW Coal Creek Pkwy SE SE 79th Pl SE 3rd St 125th Ave SE NE 25th St NE 3rd S t SE 179th St 128th Ln SE 98th Ave S NE 2nd Pl H ar die Av e S W SE 172nd Pl SE 2nd Ct NE 6th Pl 156th Pl SE S 202nd St 113th Pl SE SE 64th St 144th Ave SE S E 165th Pl S 153rd St SE 178th St SE 212th Pl 131st Ave SE SE 221st St SE 141st Pl Monroe Ave NE Jefferson Ave NE Soos Creek Trl NE 7th St NE 16th St S 209th St SE 204th St 124th Ave SE Unnamed SE Petrovitsky Rd 149th Ave SE SE 183rd St 140th Ave SE SE 72nd Pl SE 164th St SE 76th St Private Rd NE 5th Ct 99th Ave S SE 74th St SE 112th St SE 72nd St SE 67th St SE 158th St 151st Ave SE 62nd Ave S M aule A ve S 150th Pl SE SE 2nd Pl 96th Ave S E Mercer Way 84th Ave S 155th Ave SE SE 210th St P edestrian W alk NE 1st St NE 6th Ct 66th Ave S 1 3 6th A ve S E SE 186th Pl 161st Pl SE SE 203rd St SE 182nd St 160th Ave SE SE 86th St 151st Pl SE SE 176th Pl SE 213th St SE 61st St S E 1 7 0t h Pl S R 9 0 0 163rd Pl SE S E 89th Pl 161st Ave SE Index A ve S E NE 11th Pl SE 116th St S 190th St 148th Ave SE SE 212th St Andover Park W S 194th St SE 59th St BN Inc Rd Access Rd SR 515 72nd Ave S SR 169 S 55th St 148th Ave SE SR 169 Andover Park W Pedestrian Walk SR 515 I-405 Fwy SR 181 I-405 Ramp SR 181 Private Rd SE 208th St NE 3 rd St Access Rd Interurban Trl 148th Ave SE SR 515 NE 4th St Access Rd Logan Ave N Pe d e stria n W alk Access Rd 120th Pl SE East Valley Rd Lake Youngs Trl NE 8th St Lake Youngs Service Rd SE 216th St SR 167 SR 167 B N In c R d Access Rd Access Rd SR 900 SR 169 SR 169 Access Rd Private Rd SE 208th St SE 208th St SE 8th Pl Access Rd SR 515 BN Inc Rd Access Rd Figure 3.7 Renton Zoning Map Water System Plan Update City of Renton 01,5003,000 Feet O Legend Roads City Limits Waterbody Retail Water Service Area Zoning Residential Resource Conservation (RC) Residential - 1 DU/AC (R-1) Residential - 4 DU/AC (R-4) Residential - 8 DU/AC (R-8) Residential Manufactured Home Park (RMH) Residential - 10 DU/AC (R-10) Residential - 14 DU/AC (R-14) Residential Multi-Family (RM-F) Residential Multi-Family Traditional (RM-T) Residential Multi-Family Urban (RM-U) Mixed Use Centers Center Village (CV) Urban Center - North 1 (UC-N1) Urban Center - North 2 (UC-N2) Center Downtown (CD) Commercial/Mixed Use Commercial/Office/Residential (COR) Commercial Arterial (CA) Commercial Office (CO) Commercial Neighborhood (CN) Industrial Light Industrial (IL) Medium Industrial (IM) Heavy Industrial (IH) December 2012 3-22 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Ch_03 Table 3.11 Projected Average Annual Growth Rates by Customer Class Year Range Residential Connections Non-residential Connections Single-family Multi-family Commercial IndustrialGovernmentIrrigation 2010-17 1.2% 1.2% 2.4% 2.3% 0.9% 2.7% 2018-21 1.2% 1.2% 1.7% 1.4% 0.9% 1.9% 2022-31 1.0% 1.1% 1.6% 1.5% 0.8% 1.7% 2032-41 0.4% 0.6% 1.6% 2.2% 0.5% 1.1% 2042-51 0.3% 0.4% 0.6% 0.9% 0.5% 0.5% 2052-61 0.3% 0.4% 0.6% 0.8% 0.5% 0.5% 2062-71 0.3% 0.3% 0.6% 0.8% 0.4% 0.5% Table 3.12 presents the projected number of accounts for the RWSA. As shown in this table, the total number of City accounts is projected to increase from 16,800 in 2010 to 25,011 by year 2071. The projected number of accounts per customer class and pressure zones is included in Appendix I. Table 3.12 Projected Connections by Customer Type Residential Connections Non-residential Connections Year Single-family Multi-familyCommercialIndustrialGovernment IrrigationTotal 2011 13439 1,576 1,122 76 93 727 17,032 2012 13,601 1,594 1,151 78 94 748 17,266 2013 13,762 1,613 1,180 80 94 770 17,499 2014 13,924 1,632 1,206 82 95 789 17,728 2015 14,086 1,650 1,231 84 96 808 17,955 2016 14,253 1,670 1,253 85 97 823 18,181 2017 14,420 1,690 1,275 86 98 839 18,407 2021 15,089 1,768 1,361 91 101 902 19,312 2031 16,668 1,956 1,582 104 110 1,055 21,474 2041 17,388 2,065 1,833 127 116 1,174 22,703 2051 17,890 2,144 1,951 138 122 1,234 23,479 2061 18,392 2,222 2,069 150 128 1,293 24,254 2071 18,880 2,297 2,187 162 133 1,353 25,011 3.8 PROJECTED WATER DEMAND AND ERUs Projecting future water demand is one of the key elements of the water system planning process. Identification of system improvements such as supply, pumping, storage, and piping requirements are all related to demand projections. Future water system demands are based on projected ERUs, which in turn are based on the projected number of accounts discussed earlier in Section 3.7. This section summarizes December 2012 3-23 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Ch_03 the ERU, ADD, and MDD projections, as well as the potential range in future demands associated with various factors, such as variations in ERU values, unaccounted-for water, climate change, and water conservation. 3.8.1 Projected Equivalent Residential Units The projected number of ERUs for the RWSA was calculated by multiplying the projected number of accounts provided in Table 3.12 by the number of ERUs per account provided in Table 3.8. The total number of ERUs for each customer type for the selected planning years is presented in Table 3.13. Figure 3.8 provides a visual representation of the projected ERU growth rate. It should be noted that the projected ERUs do not include distribution leakage, miscellaneous water use, or wholesale customer demand. These additional demands are included in the projected demands, as described in Section 3.8.2. Table 3.13 Projected ERUs by Customer Type Residential Connections Non-residential Connections Year Single-family Multi-familyCommercialIndustrialGovernment IrrigationTotal 2011 13,439 8,523 7,271 739 811 5,384 36,167 2012 13,601 8,624 7,458 758 818 5,545 36,804 2013 13,762 8,726 7,644 776 825 5,704 37,437 2014 13,924 8,827 7,814 794 832 5,847 38,038 2015 14,086 8,928 7,980 813 839 5,986 38,632 2016 14,253 9,034 8,120 824 847 6,102 39,180 2017 14,420 9,140 8,259 836 854 6,218 39,729 2021 15,089 9,564 8,819 883 885 6,683 41,922 2031 16,668 10,580 10,249 1,011 959 7,819 47,285 2041 17,388 11,170 11,880 1,232 1,011 8,699 51,381 2051 17,890 11,596 12,643 1,344 1,063 9,142 53,678 2061 18,392 12,022 13,406 1,457 1,115 9,584 55,976 2071 18,880 12,427 14,169 1,569 1,164 10,026 58,234 20 0 0 0 30 , 0 0 0 40 , 0 0 0 50 , 0 0 0 60 , 0 0 0 70 , 0 0 0 mber of Equivalent Residential Units Pr o j e c t e d E R U s Hi s t o r i c a l E R U s Pr o j e c t e d Hi s t o r i c a l Fi g u r e 3 . 8 Pr o j e c t e d N u m b e r o f E R U s Wa t e r S y s t e m P l a n U p d a t e Ci t y o f R e n t o n 0 10 , 0 0 0 20 ,00 0 20 0 1 20 1 1 20 2 1 20 3 1 20 4 1 20 5 1 20612071 Num Ye a r December 2012 3-25 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Ch_03 3.8.2 Projected Average and Maximum Day Demands The projected average day demand for service connections was calculated by multiplying the projected ERUs in each pressure zone by the ERU value of 171 gpd. The service connection demands are added to the distribution leakage, miscellaneous water use, and wholesale water to project the total average day demand (Table 3.14), as described below:  Wholesale and Large Water Users: The City has three customers that are considered large water users, consuming an average of roughly 100,000 gpd or more. These are the Boeing Plant, the King County WWTP, and the City’s wholesale customer, Skyway.  Wholesale Water to Skyway: Wholesale demands for Skyway are taken from the Skyway Water and Sewer District Comprehensive Plan - Water and Sewer Systems. Forecast demands were only available through 2022. Skyway wholesale water demands from 2031 through 2071 are assumed to be equal to the 2022 demands.  King County WWTP and Boeing Plant: For the purposes of the future water demand projections, it was assumed that the King County WWTP and the Boeing Plant’s water demand would not increase in the future. Based on consumption data provided by the City for these two users, there was a downward trend in water demand from these customers from 2004 to 2009. As previously noted, the Skyway Wholesale demands were projected from information presented in the Skyway Comprehensive Plan.  Other Authorized Water Consumption: Other authorized water consumption fluctuated between 0.38 and 0.88 percent of the total City production between 2004 to 2009, with an average of 0.57 percent. The demand projections in Table 3.14 assume that other authorized water consumption will account for 0.57 percent of total City demand through 2071. However, tracking of this demand is anticipated to grow as the City improves tracking of other authorized uses.  Unaccounted-for Water: Distribution system leakage fluctuated between 15.8 percent and 20.2 percent of the total City production between 2004 and 2009, with an average of 17.8 percent. The demand projections in Table 3.14 assume that unaccounted-for water will continue to account for roughly 17.8 percent of the total City demand through year 2071. Chapter 4 includes a discussion of the actions to be taken by the City to help meet the ten percent goal. The projected MDD is simply the projected ADD multiplied by the MDD/ADD factor of 1.83. The projected MDD for the Skyway Wholesale demand was based on the projections provided from the 2005 Skyway Comprehensive Plan. Table 3.14 summarizes the projected MDD. Figure 3.9 provides a visual representation of the projected system-wide ADD and MDD. Average day and maximum day demand projections by pressure zone are included in Appendix I. December 2012 3-26 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Ch_03 Table 3.14 Projected Average and Maximum Day Demands Year Projected ADD1-4 (mgd) Projected MDD5 (mgd) Projected ERUs 2011 8.15 15.12 36,167 2012 8.29 15.39 36,804 2013 8.43 15.65 37,437 2014 8.56 15.91 38,038 2015 8.70 16.16 38,632 2016 8.82 16.39 39,180 2017 8.94 16.62 39,729 2021 9.43 17.55 41,922 2031 10.58 19.7 47,285 2041 11.44 21.27 51,381 2051 11.93 22.15 53,678 2061 12.41 23.02 55,976 2071 12.88 23.89 58,234 Notes: 1. ADD = Projected ERUs x 171 gpd/ERU + Skyway Wholesale + SPU Water to Boeing + King County WWTP Consumption + Other Authorized Consumption + Unaccounted-for Water. 2. Wholesale demand projections for Skyway from the 2005 Skyway Water and Sewer District Comprehensive Plan - Water and Sewer Systems. 3. Other Authorized Consumption is estimated to be 0.57 percent of the total system demand. 4. Unaccounted-for Water is assumed to be 17.8 percent of total system demand. 5. MDD = 1.83 x ADD (Skyway maximum day to average day peaking factor is 3.34). 1015202530 Water Demand (mgd) Pr o j e c t e d M D D Pr o j e c t e d Hi s t o r i c a l Fi g u r e 3 . 9 Pr o j e c t e d A v e r a g e a n d Ma x i m u m D a y D e m a n d Wa t e r S y s t e m P l a n U p d a t e Ci t y o f R e n t o n 05 20 0 1 20 1 1 20 2 1 20 3 1 20 4 1 20 5 1 20 6 1 20 7 1 Ye a r Pr o j e c t e d A D D Hi s t o r i c a l A D D Hi s t o r i c a l M D D December 2012 3-28 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Ch_03 3.8.3 Potential Range in Future Water Demand Numerous factors and assumptions affect the accuracy of projected future water demands. Recognizing that certain assumptions built into the demand projections presented in Section 3.1.12 will vary in the future, the projected water demands were bracketed to provide a range in demands that may be experienced in the future. The variables considered in the development of the range in demand projections include:  Removing the Build-Out Cap: As described in Appendix I, a development “cap” was applied to build-out conditions, which assumes that no redevelopment occurs beyond the two specific redevelopment areas identified by the City. A high growth scenario was evaluated to allow growth to continue beyond this cap, following the PSRC growth projections and assuming linear growth continues beyond 2040. This scenario therefore assumes additional redevelopment.  Variation in Water Use per ERU: From 2004 to 2009, the historical water use per single-family residential connection (i.e., the ERU) varied between 164 gpd and 178 gpd. To account for this variability, the low end and high-end water demand projections assume an average water use per ERU of 164 gpd and 178 gpd, respectively.  Unaccounted-for Water: Unaccounted-for water varied between 15.8 percent and 20.2 percent of the total City production between 2004 and 2009. Additionally, the City could potentially reduce the amount of unaccounted-for water within the system in the future by addressing the five areas of focus listed in Section 3.5. The goal of the State of Washington’s Water Use Efficiency Rule is 10 percent. For this reason, the low-end water demand projections assume an unaccounted-for water of 10 percent. The high-end water demand projections assume the historical average of 17.8 percent.  Other Authorized Water Consumption: From 2004 through 2009, other authorized water consumption varied between 0.38 and 0.88 percent of the total water produced/purchased by the City. For this reason, the low-end water demand projections assume that miscellaneous water consumption will account for 0.38 percent of the total demand, and the high-end demand projections assume that miscellaneous water consumption will account for 0.57 percent (historical average) of the total demand.  Climate Change: The impacts of climate change could potentially impact the City’s projected water demand. In 2009, the Water Supply Forum, which is a voluntary organization comprised of representatives from King, Pierce, and Snohomish counties, released its 2009 Regional Water Supply Outlook. This document serves as a comprehensive assessment of municipal water supply and demand in King, Pierce, and Snohomish Counties. Chapter 3 of the Regional Water Supply Outlook provides a narrative of the effect of climate change in Puget Sound Region. December 2012 3-29 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Ch_03 In general, the Regional Supply Outlook asserts that climate change will likely lead to increased irrigation with an extended growing season and lead to increasing temperatures, seasonal shifts in precipitation, more evaporation, and increased frequency of drought events. Chapter 7 of the Regional Supply Outlook provided water demand forecasts for the area, which include the potential effects of climate change. Based on the information presented in this chapter, it is estimated that climate change could lead to an average increase in water demand of roughly 6 percent by year 2060. For the purposes of this study, it was assumed that the effect of climate change on the projected water demands would increase linearly to 6 percent through 2030, and remain constant at 6 percent through 2071. Based on the assumptions listed above, a potential range of future water demands was developed as shown on Figure 3.10 and summarized in Table 3.15. The range in demands is bracketed for both high end and low-end projections with and without the effect of climate change. As shown in Table 3.15, the projected 2071 ADD could range between 11.3 mgd and 13.8 mgd without climate change. Considering the effect of climate change, the 2071 ADD could range between 11.3 mgd and 15.1 mgd. The projected 2071 MDD could range between 21.0 mgd and 27.9 mgd without the effect of climate change, and 22.2 mgd to 29.6 mgd considering the effect of climate change. The “base” demand projections shown on Figure 3.10 and summarized in Table 3.15 are identical to the demand projections summarized in Section 3.8.2, and assume the average water use per ERU, unaccounted- for water, and other authorized water use from 2004 through 2009. It should be noted that the potential range in future demands shown on Figure 3.10 does not account for demand reductions associated with additional conservation measures by the City. These demands are introduced in Section 3.8.4 and summarized in Chapter 4. 3.8.4 Projected Range of Demands with Additional Conservation The City has developed goals related to its WUE program. Implementation of the measures identified by the City could lead to reductions in the City’s projected water demands in the future. More detailed information regarding the City’s WUE program, as well as the established goals of the program, is included in Chapter 4. Water demand projections considering the effect of water conservation are also included in Chapter 4. 1015202530 Projected Demand (mgd) Pr o j e c t e d Hi s t o r i c a l Pr o j e c t e d Hi s t o r i c a l Pr o j e c t e d Hi s t o r i c a l 05 20 0 1 2 0 1 1 2 0 2 1 2 0 3 1 2 0 4 1 2 0 5 1 2 0 6 1 2 0 7 1 Ye a r Hi s t o r i c a l A D D Hi s t o r i c a l M D D Ba s e A D D Ba s e M D D Hi g h - R a n g e A D D ( w / C l i m a t e C h a n g e ) Hi g h - R a n g e M D D ( w / C l i m a t e C h a n g e ) AD D R a n g e ( w / o C l i m a t e C h a n g e ) MD D R a n g e ( w / o C l i m a t e C h a n g e ) Fi g u r e 3 . 1 0 Po t e n t i a l R a n g e i n Fu t u r e D e m a n d P r o j e c t i o n s Wa t e r S y s t e m P l a n U p d a t e Ci t y o f R e n t o n December 2012 3-31 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Ch_03 T a b l e 3 . 1 5 P r o j e c t e d R a n g e i n F u t u r e D e m a n d P r o j e c t e d A v e r a g e D a y D e m a n d ( m g d ) P r o j e c t e d M a x i m u m D a y D e m a n d ( m g d ) W i t h o u t C l i m a t e C h a n g e W i t h C l i m a t e C h a n g e 4 W i t h o u t C l i m a t e C h a n g e W i t h C l i m a t e C h a n g e 4 Ye a r Lo w - Ra n g e 1 Ba s e 2 Hi g h - Ra n g e 3 Lo w - Ra n g e 1 Ba s e 2 Hi g h - Ra n g e 3 Lo w - Ra n g e 1 Ba s e 2 Hi g h - Ra n g e 3 Lo w - Ra n g e 1Base2 High-Range3 20 1 1 7 . 1 8 . 1 8 . 5 7 . 1 8 . 2 8 . 5 1 3 . 3 1 5 . 1 1 5 . 7 1 3 . 3 1 5 . 1 1 5 . 7 20 1 2 7. 3 8 . 3 8 . 6 7 . 3 8 . 3 8 . 7 1 3 . 5 1 5 . 4 1 6 . 0 1 3 . 5 1 5 . 4 1 6 . 1 20 1 3 7. 4 8 . 4 8 . 8 7 . 4 8 . 5 8 . 8 1 3 . 7 1 5 . 7 1 6 . 3 1 3 . 8 1 5 . 7 1 6 . 4 20 1 4 7 . 5 8 . 6 9 . 0 7 . 5 8 . 6 9 . 0 1 4 . 0 1 5 . 9 1 6 . 6 1 4 . 0 1 6 . 0 1 6 . 7 20 1 5 7 . 6 8 . 7 9 . 1 7 . 7 8 . 7 9 . 2 1 4 . 2 1 6 . 2 1 6 . 9 1 4 . 3 1 6 . 3 1 7 . 0 20 1 6 7 . 7 8 . 8 9 . 3 7 . 8 8 . 9 9 . 3 1 4 . 4 1 6 . 4 1 7 . 2 1 4 . 5 1 6 . 5 1 7 . 4 20 1 7 7 . 8 8 . 9 9 . 4 7 . 9 9 . 0 9 . 5 1 4 . 6 1 6 . 6 1 7 . 5 1 4 . 7 1 6 . 8 1 7 . 7 20 2 1 8 . 3 9 . 4 1 0 . 0 8 . 4 9 . 6 1 0 . 2 1 5 . 4 1 7 . 6 1 8 . 7 1 5 . 6 1 7 . 8 1 8 . 9 20 3 1 9. 3 1 0 . 6 1 1 . 5 9 . 5 1 0 . 9 1 1 . 8 1 7 . 3 1 9 . 7 2 1 . 4 1 7 . 7 2 0 . 2 2 1 . 9 20 4 1 10 . 0 1 1 . 4 1 2 . 7 1 0 . 4 1 1 . 9 1 3 . 2 1 8 . 7 2 1 . 3 2 3 . 5 1 9 . 4 2 2 . 1 2 4 . 4 20 5 1 1 0 . 4 1 1 . 9 1 3 . 5 1 1 . 0 1 2 . 5 1 4 . 1 1 9 . 4 2 2 . 1 2 5 . 0 2 0 . 4 2 3 . 2 2 6 . 2 20 6 1 1 0 . 9 1 2 . 4 1 4 . 3 1 1 . 5 1 3 . 2 1 5 . 1 2 0 . 2 2 3 . 0 2 6 . 5 2 1 . 4 2 4 . 4 2 8 . 0 20 7 1 1 1 . 3 1 2 . 9 1 5 . 1 1 2 . 0 1 3 . 7 1 6 . 0 2 1 . 0 2 3 . 9 2 7 . 9 2 2 . 2 2 5 . 3 2 9 . 6 No t e s : 1. L o w - r a n g e p r o j e c t i o n s a s s u m e a n a v e r a g e co n s u m p t i o n o f 1 6 4 g p d / E R U , m i s c e l l a n e o u s wa t e r c o n s u m p t i o n = 0 . 3 8 % o f t o t a l d e m a n d , and un a c c o u n t e d - f o r w a t e r = 1 0 % o f t o t a l d e m a n d . 2. B a s e p r o j e c t i o n s a s s u m e a n a v e r a g e c on s u m p t i o n o f 1 7 1 g p d / E R U , m i s c e l l a n e o u s w a t e r c o n s u m p t i o n = 0 . 5 7 % o f t o t a l d e m a n d , a n d un a c c o u n t e d - f o r w a t e r = 1 7 . 8 % o f t o t a l d e m a n d . 3. H i g h - r a n g e p r o j e c t i o n s a s s u m e a n a v e r a g e co n s u m p t i o n o f 1 7 8 g p d / E R U , m i s c e l l a n e o u s wa t e r c o n s u m p t i o n = 0 . 8 8 % o f t o t a l d e m a n d , and un a c c o u n t e d - f o r w a t e r = 2 0 . 2 % o f t o t a l d e m a n d . 4. D e m a n d s a r e a s s u m e d t o i n c r e a s e 6 % o n av e r a g e b y 2 0 6 0 a s a r e s u l t o f c l i m a t e c h a ng e . T h e e f f e c t o f c l i m a t e c h a n g e w a s a s s u m e d to in c r e a s e l i n e a r l y t o 6 p e r c e n t f r o m 2 0 1 1 t h r o u g h 2 0 6 0 , a n d r e m a i n c o n s t a n t a t 6 % a f t e r 2 0 6 0 . December 2012 4-1 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 4/Ch04.docx Chapter 4 WATER USE EFFICIENCY AND CONSERVATION PLAN This chapter presents the City’s Conservation and Water Use Efficiency Plan for the next six years. During this period, the City will join the Saving Water Partnership, which will expand the breadth and depth of the City’s conservation activities. In 2003, the Washington State Legislature passed the Engrossed Second Substitute House Bill 1338, known as the Municipal Water Law or the Water Use Efficiency (WUE) rule, to address the increasing demand on Washington’s water resources. This law established that all municipal water suppliers (MWS) must use water more efficiently in exchange for water right certainty and flexibility to help them meet future demand. The WUE program, which became effective on January 22, 2007, emphasizes the importance of measuring water use and evaluating the effectiveness of the water supplier’s WUE program. The intent is to minimize water withdrawals and water use by implementing water saving activities and adopting policies, resolutions, ordinances, or bylaws. This chapter follows the guidelines set forth in the Water Use Efficiency Guide Book, Third Edition, January, 2011 as well as the Water System Planning Handbook (April 1997). The WUE Guide replaces the Conservation Planning Requirements, March 1994. The following four fundamental elements in the WUE program are discussed in detail below: 1. Planning requirements. 2. Distribution leakage standard. 3. Metering requirements. 4. Conservation planning and goal setting. 4.1 PLANNING REQUIREMENTS A municipal water system plan is required to include the following WUE elements:  Data collection.  Demand forecast. 4.1.1 Data Collection The WUE rule requires the collection of production and consumption data on a regular basis. These are utilized in this planning document to forecast future demand, describe water supply characteristics, to aid in water management decision making, to calculate distribution system leakage (DSL), evaluate the WUE program, and be submitted to the state in the annual WUE report. Data is summarized as monthly and annual totals for both December 2012 4-2 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 4/Ch04.docx production and consumption, Table 4.1 details the types of water production and consumption data collected. Table 4.1 Categories of Data Collection Water Volume Entering Distribution System Water Produced (from Renton wells and spring) Water Purchased (from City of Seattle) Authorized Water Consumption - Metered Single-family and Single-family Irrigation Multi-family and Multi-family Irrigation Industrial/Commercial/Institutional Industrial/Commercial/Institutional Irrigation Combined Class Irrigation Renton Maintenance Use Agriculture Interties Wholesale Authorized Water Consumption - Non-metered Fire Fighting Tank/Reservoir Cleaning 4.1.2 Demand Forecast Demand forecasting identifies how much water will be needed in the future. The demand forecast projects demand with and without savings obtained from the WUE program conservation measures. The forecast assumes an average annual reduction in water use by 0.5 percent per connection and per employee per year through 2020. The forecasted demands were developed using demographic projections from the PSRC and the City’s Planning Department including housing and population forecasts, as well as land use plans. The details of the demand forecast for the Plan can be found in Chapter 3, Planning Data and Water Demand Forecasts. 4.2 DISTRIBUTION SYSTEM LEAKAGE Municipal water suppliers must now meet a 10 percent or less DSL to comply with the WUE standard. Leakage is to be presented both as a percentage and as leakage volume, and based on a rolling three-year average. Renton collects system production and consumption data using its source, intertie, purchase, and service water meters. Data is summarized as monthly and annual totals for both production and consumption. December 2012 4-3 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 4/Ch04.docx The WUE requirements establish a 10 percent or less DSL standard based on a 3-year rolling average. Table 4.2 utilizes collected data to determine distribution system leakage for the data period 1988 to 2010. Annual DSL is calculated in both percentage and volume. The graph of the rolling 3-year average, Figure 4.1, shows that the DSL is on a downward trend. Because Renton’s DSL exceeds 10 percent, a “Water Loss Control Action Plan” was developed. Implementation began in 2008. The Plan can be found in Appendix P. Implementation of this plan establishes compliance with the WUE rule. Table 4.2 Distribution System Losses (DSL) Year Volume (cf) % Rolling 3-Year Average 1988 156,433,666 33.87 1989 78,414,210 20.80 1990 73,673,971 19.74 24.80 1991 72,448,198 19.74 20.09 1992 74,679,859 20.43 19.97 1993 52,878,194 16.79 18.99 1994 48,138,404 14.52 17.25 1995 45,496,057 13.73 15.01 1996 57,025,507 16.36 14.87 1997 60,243,147 17.06 15.72 1998 63,537,739 17.15 16.86 1999 62,292,290 16.61 16.94 2000 51,907,191 13.80 15.85 2001 48,187,848 13.52 14.64 2002 47,290,486 13.14 13.49 2003 45,520,172 12.10 12.92 2004 59,898,975 15.76 13.67 2006 67,070,031 17.19 15.82 2005 51,673,104 14.50 14.12 2007 74,727,111 19.13 16.94 2008 68,045,881 18.82 18.38 2009 63,201,999 17.08 18.34 2010 49,293,265 14.84 16.91 051015202530 19 9 0 1 9 9 1 1 9 9 2 1 9 9 3 1 9 9 4 1 9 9 5 1 9 9 6 1 9 9 7 1 9 9 8 1 9 9 9 2 0 0 0 2 0 0 1 2 0 0 2 2 0 0 3 2 0 0 4 2 0 0 6 2 0 0 5 2 0 0 7 2 0 0 8 2 0 0 9 2 0 1 0 Percent Figure 4.1 DS L 3 - Y e a r R o l l i n g A v e r a g e Wa t e r S y s t e m P l a n U p d a t e City of Renton December 2012 4-5 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 4/Ch04.docx 4.3 METERING As required by the Municipal Water Law, all Renton’s sources of supply, as well as interties and purchases, are metered with production meters. Renton also provides service metering for its customers. Customer consumption meters are categorized either as large (3-inches or greater) or small (smaller than 3-inches). Renton is in full compliance with the WUE metering requirements. All large service meters are tested annually and repaired as needed. Small service meters are repaired or replaced on an as-needed basis. Renton is in the process of implementation of an AMR program. One benefit of the AMR program will be to provide more time for operations and maintenance staff to perform maintenance on small, as well as large meters, on a more regular schedule. This should contribute to lowering of DSL. 4.4 CONSERVATION PLANNING Fundamental to developing a successful WUE and Conservation Plan, is an understanding of how, where and when water is used. This knowledge helps to see where savings and efficiencies could be made. Renton has a total of 17, 395 connections (2010), dominated by domestic connections as shown in Table 4.3. Likewise, Figure 4.2 indicates that domestic single- and multi-family consumption is the dominate use. Despite the fact that the combined domestic use of single and multi-family connections consumes the greatest percentage of water produced, the Commercial and Industrial sector with only 6.8 percent of connections, accounts for 25 percent of overall consumption. Both of these sectors have potential efficiency and conservation savings. Table 4.3 Connections by Customer Category – 2010 Single- family Multi-family Commercial & Industrial Government & Schools Irrigation Total 13,257 1,551 1,185 693 709 17,395 76.2% 8.9% 6.8% 4.0% 4.1% 100% Monthly consumption is presented in Figure 4.3. Summer irrigation season generally begins in May and extends through September. The peak irrigation months of July and August 2010, experienced a 63 percent increase in average daily water consumption; this is typical. This shows that the irrigation and general outdoor summer use also have potential efficiency and conservation savings. Figure 4.2 Wa t e r U s e b y C u s t o m e r Category - 2010 Wa t e r S y s t e m P l a n U p d a t e City of Renton Mo n t h Production, MG Ja n u a r y 1 8 1 . 6 9 2 Fe b r u a r y 1 6 1 . 9 0 9 Ma r c h 1 7 9 . 7 2 6 Ap r i l 1 7 3 . 6 3 May 196.378 Ju n e 2 0 3 . 0 0 5 Ju l y 3 0 0 . 4 7 9 Au g u s t 3 1 5 . 6 7 9 Se p t e m b e r 2 1 1 . 9 8 4 Oc t o b e r 1 8 6 . 2 0 5 No v e m b e r 1 7 3 . 4 3 2 De c e m b e r 1 7 9 . 6 5 4 TO T A L 2 4 6 3 . 7 7 7 Figure 4.3 Mo n t h l y W a t e r P r o d u c t i o n 2 0 1 0 Wa t e r S y s t e m P l a n U p d a t e City of Renton December 2012 4-8 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 4/Ch04.docx 4.4.1 Historic Conservation Program Renton’s water conservation programming began with the passage of the Water Use Efficiency Act of 1989, which required all public water systems to have a conservation program by 1996. In 1989, the initiation of a leak detection and repair program resulted in a noticeable drop in volume of unaccounted-for water. Since 1990, conservation programming has included, school outreach, a speakers’ bureau, fairs and promotion of regional programs. The addition of the 12-month water consumption history on water bills was started in 1992. Since 1994, the City of Renton has employed increasingly complex tiered water pricing rates to encourage conservation. Table 4.4 provides a summary of past and current conservation efforts. Those measures with an ‘H’ in the implementation column are historical measures and have been being implemented since before 2006. Current measures are indicated with a ‘C’, these have been in effect during the last six years. Measures that will be carried forward through the next six years are indicated with a ‘P’. 4.4.1.1 Consumption History The single-family residential average monthly water use per connection from 1988 through 2010 is presented in Figure 4.4. During this period, single-family consumption per connection has decreased by approximately 25 percent. Over the most recent planning period of 2004 through 2010, single-family usage has decreased by an average of 26 gpd, representing a 14 percent decrease. Overall, annual consumption per connection during this period decreased by 30 percent (Figures 5.5 and 5.6). There have been a variety of events and influences that have affected this downturn. The significant decline in water use in 1993 is in large part attributable to the drought that occurred in 1992 to 1993 and major regional education efforts. Water use following 1993 never returned to the same levels as were experienced prior to the drought. The change in the City’s rate structure (with inverted rate blocks) also occurred in 1994, and is believed to have impacted water use. In 2009, the City again instituted a more aggressive inverted rate block structure for single-family and duplex customers, as well as changes to the multi-family and irrigation rates. Overall rate increases in subsequent years have also sent a conservation message and impacted consumption. Although, many factors contribute to the amount of water consumed, a consistent decline in water use over time is an indication that water conservation measures and education are having a long-term impact. 22 6 22 8 22 6 22 0 20 8 19 2 21 4 20 7 20 3 19 7 20 2 18 8 19 0 17 5 18 0 19 3 18 5 16 9 18 0 176168172159 050 10 0 15 0 20 0 25 0 19 8 8 1 9 8 9 1 9 9 0 1 9 9 1 1 9 9 2 1 9 9 3 1 9 9 4 1 9 9 5 1 9 9 6 1 9 9 7 1 9 9 8 1 9 9 9 2 0 0 0 2 0 0 1 2 0 0 2 2 0 0 3 2 0 0 4 2 0 0 5 2 0 0 6 2 0 0 7 2 0 0 8 2 0 0 9 2 0 1 0 Gallons per Connection per Day YE A R Figure 4.4 An n u a l A v e r a g e C o n s u m p t i o n Si n g l e - F a m i l y C o n n e c t i o n Wa t e r S y s t e m P l a n U p d a t e 2, 5 0 0 , 0 0 0 2, 6 0 0 , 0 0 0 2, 7 0 0 , 0 0 0 2, 8 0 0 , 0 0 0 2, 9 0 0 , 0 0 0 3, 0 0 0 , 0 0 0 3, 1 0 0 , 0 0 0 3, 2 0 0 , 0 0 0 3, 3 0 0 , 0 0 0 3, 4 0 0 , 0 0 0 Total Consumption, ccf Figure 4.5 To t a l C o n s u m p t i o n Wa t e r S y s t e m P l a n U p d a t e City of Renton 15 0 17 0 19 0 21 0 23 0 25 0 27 0 19 8 8 1 9 8 9 1 9 9 0 1 9 9 1 1 9 9 2 1 9 9 3 1 9 9 4 1 9 9 5 1 9 9 6 1 9 9 7 1 9 9 8 1 9 9 9 2 0 0 0 2 0 0 1 2 0 0 2 2 0 0 3 2 0 0 4 2 0 0 5 2 0 0 6 2 0 0 7 2 0 0 8 2 0 0 9 2 0 1 0 Consumption, ccf Figure 4.6 An n u a l C o n s u m p t i o n per Connection Wa t e r S y s t e m P l a n U p d a t e City of Renton December 2012 4-12 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 4/Ch04.docx Table 4.4 Renton Historical, Current and Proposed Water Conservation Measures Measure Description Savings Implementation1 Production Metering (M) Annually calibrate meters on all sources Supply Side H C P Consumption Metering (M) All service connections are metered Supply Side H C P Pipe Leak Detection and Repair (M) Leak detection and pipe replacement Supply Side H C P Water Loss Control Action Plan (M) Systematic pipe and valve leak check, repair and replacement to decrease DSL for WUE compliance Supply Side C P Household Leak Detection and Prevention Kits Available at City of Renton’s Utility Office Demand Side H Sprinkler Rain gauge Small yard gauge for measuring rain and sprinkler Demand Side H C Sink Aerator Free aerator reduces kitchen sink to 1.5 gpm Demand Side C Water Watch Hose attachment to measure volume of water Demand Side C Water Rates (M) Increasing block rate Demand Side H C P School Outreach Classroom and teacher association presentation Demand Side H C P Utility Bill Inserts Inclusion of conservation tips in utility bill mailing Demand Side H C P Public Presentations Presentation at fairs and workshops in the Renton area Demand Side H C P Water Bill Consumption History History included with all customer utility bills Demand Side H C P Advertising Public advertising through membership in Partnership for Water Conservation Demand Side H C P Natural Yard Care Workshops Coordinate presentations with Solid Waste Utility Demand Side H C P City Demonstration Garden Located at Renton City Hall Demand Side H C P WashWise washing machine rebate Rebate Hardware replacement incentive program Demand Side C Hose Gaskets Garden hose gaskets to stop leaks Demand Side C P Web Page Indoor, outdoor tips as well as links and kids’ page Demand Side C P Notes: H = historically implemented measure; C = currently implemented measure; P = implementation of measure will continue into the future. December 2012 4-13 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 4/Ch04.docx 4.4.2 Current Conservation Program 4.4.2.1 Municipal Water Law Current water conservation planning is governed by the Municipal Water Law (MWL) or Water Use Efficiency Rule. This rule stipulates the minimum number and type of efficiency measures that a conservation program must evaluate or implement. As a municipal water supplier with more than 17,000 connections, Renton is required by the MWL to implement the five mandatory measures and either implement or evaluate the two others. These are shown in Table 4.5. It is also required to evaluate or implement nine measures of its choice. Table 4.5 WUE Mandatory Measures Must implement the following WUE measures: Status Install production (source) meters Implemented Install consumption (service) meters Implemented Perform meter calibration Implemented / ongoing Implement a water loss control action plan to control leakage if exceeds 10% Implemented / ongoing Educate customers about water efficiency at least once per year Implemented /ongoing Must evaluate or implement these WUE measures: Evaluate rates that encourage water demand efficiency Implemented Evaluate reclamation Implemented / reviewed* Renton’s current conservation program was developed through a public process to support the City’s WUE goals. The original objectives and goals, presented below, are being carried forward to this water system plan. It is hoped that this plan will develop the attitude and behavior of Renton residents to actively and instinctively conserve water. 4.4.2.1.1 WUE Objectives As part of the initial WUE compliance, Renton reviewed its water system and water usage and developed four objectives for its WUE plan: 1. Identify and reduce sources of distribution system leakage. 2. Ensure efficient water supply for continued growth within its service area. 3. Reduce peak day and peak season demands. 4. Continue the historical trend of reduction in customer water usage. December 2012 4-14 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 4/Ch04.docx 4.4.2.1.2 WUE Goals To meet these objectives, measureable goals were defined: 1. Reduce distribution system leakage to ten percent or less by 2010. 2. Limit the peak day demand at 16.5 mgd or less through 2015. 3. Continue reduction of the average annual water use per customer connection by one- half percent per year. 4.4.2.2 Mandatory Measures Meters. Both production meters and consumption meters have been installed, with AMR underway, so those measures can be considered fully implemented. Meter calibration, the water loss control plan is ongoing and will be continued. Reclamation. A thorough evaluation of the usage potential for reclaimed water in the City was made in response to a Department of Ecology water resource policy initiative and the DOH Interim Conservation Guidelines of 1994. The study included a pilot project and long- range plan for developing a citywide distribution system that would use reclaimed water for a variety of uses. The title of the study is “City of Renton Conceptual Reuse Plan” (COR File Code WTR-09-0009). Further, in 1995, King County, the City of Renton and the City of Seattle Water Department published a study titled “Water Reclamation and Reuse: A Feasibility Study for the King County Metropolitan Area”. The study concluded that under most conditions, the present cost of reclaimed water service would be higher than the Seattle marginal cost for developing new potable supplies. A successful project would have to serve a reasonably large demand (at least one MGD) and be located adjacent to a source of secondary treated effluent. The report noted that the King County Renton Effluent Transfer System (RETS) 96-inch pipeline in the Duwamish Corridor already had twelve taps in place for reclamation and reuse. Therefore, site-specific reuse projects along the Duwamish Corridor were suggested as having the most potential to be cost-effective from “An Economic Analysis of the North Seattle Reclaimed Water Project.” In 2011, the King County Wastewater Treatment Division began another engineering, environmental, and economic analysis of conceptual reclaimed water strategies. The City is working with King County to provide them with information for their study. A completed King County Water Reclamation Evaluation Checklist for the City of Renton is included as Appendix M. Education. The mandatory requirement for annual customer water use efficiency education is met through the City’s annual water quality report. This report includes annual consumer confidence report information, annual water use efficiency data as well as water conservation education advice. It is mailed to all households within the City’s water service area. Other customer education measures are included in the selected measures below. December 2012 4-15 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 4/Ch04.docx Rate Structure. The final mandatory measure, water rate structure, can be an important way of encouraging water conservation. A two-tiered inverted block rate pricing structure for single-family homes and duplexes was introduced in 1994. In 2009, Renton again evaluated and instituted changes to its rate structure. Changes included defined rates for more customer classes and also a more aggressive inverted rate block structure for single-family and duplex customers, as well as changes to the multi- family and irrigation rates. The previous and new rates for customer classes are shown in Table 4.6. Table 4.6 Changes in Customer Class Rates Previous Rate Structure (Cost per 100 cf) New Rate Structure - 2012 (Cost per 100 cf) Single-family / Duplex 2-tier block rate ($2.01 and $2.14) 3-tier block rate ($2.30, $3.09 and $3.90) Multi-family $2.01 $2.98 Non-residential $2.01 $3.16 Irrigation $2.01 $5.06 Irrigation (city accounts) $2.01 $2.27 4.4.3 Proposed Conservation Program Based on the number of connections, the WUE rule requires that, besides the mandatory measures, the City must evaluate or implement nine measures of its choice that support the proposed goals. Review of Table 4.4 shows that the City currently has nine measures beyond the mandatory ones that will be carried forward as part of the new plan. Renton’s conservation strategy has historically been focused on the residential consumer, both indoor and outdoor. Continued savings attest to the success of the program. Most recently, emphasis has been on the reduction of summer peak usage and has been set as a WUE goal. The addition of the third tier and increased irrigation rates were instituted to help lower the peak consumption. 4.4.3.1 Selected Measures Water Bill Consumption History. Customer bills provide historical data to help educate customers of their usage patterns throughout the year and particularly see the impact of outdoor watering. With this information they can make informed choices related to conservation and water costs. All customers benefit from this information. School Outreach. Renton provides interactive educational experience for elementary grades through Family Science nights, Girl Scout camps and wherever requested. Targeted third grade classroom presentations will hopefully be able to be reinstated in the coming years. The City also partners with other purveyors through participation in the Partnership December 2012 4-16 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 4/Ch04.docx for Water Conservation to produce and update educational materials to explain the groundwater story and promote conservation. Utility Bill Inserts. This avenue of communicating with the customer is a very effective means to deliver a focused message. Once or twice per year, conservation information is included with the utility bill. Messages are geared toward residential customers. Natural Yard Care Workshops. The Water Utility partners with the City’s Solid Waste Department to educate customers about water efficient gardening, as well as reducing toxic chemicals in the yard and garden. Advertising and Public Outreach. Renton is a member of the regional Partnership for Water Conservation, the national Alliance for Water Efficiency, the US EPA WaterSense partnership, the Groundwater Foundation and beginning in 2012, the Saving Water Partnership. As such, the City supports their missions to promote water efficiency and conservation through local, regional, and national advertising. City Demonstration Garden. The City maintains a demonstration garden featuring low water and low maintenance plants at the 200 Mill Ave S building. The garden presents an educational viewing of well-established plants that thrive in low water and sloped conditions. WashWise Washing Machine Rebates. Since mid-2007, Renton has offered rebates to customers to replace less efficient clothes washers with ones that use less water and energy. Level of rebate depends on machine’s level of water and energy savings. Through 2010, the Renton WashWise program has rebated 1,441 machines, which effects an average annual water savings of 11.2 million gallons from the use of these machines. Hose Gaskets. Replacement hose gaskets are offered at Renton River Days and other public events. Several hundred are distributed each year and continue to be popular. Savings are indeterminate but do contribute to summer peak reduction. Web Page. The Conservation web page provides information for indoor and outdoor savings as well as links to rebate and other resources. The Kids’ page provides information for kids and teachers. Participation in the Saving Water Partnership will bring access to a broad set of online conservation resources to be linked through the Renton website. 4.4.3.2 Regional Conservation Participation To help achieve the City’s stated WUE objective: “Ensure efficient water supply for continued growth within its service area.”, the City, as part of its long-range water supply planning, evaluated alternate sources of water supply to meet the growing water demand from the projected population growth and from development within the City's water service area. In 2010, the Water Utility evaluated alternatives for the City to obtain additional water supply from SPU, Cascade Water Alliance (CWA), and from constructing water quality improvements to currently unused Well 5A. The most cost-beneficial and reliable alternative December 2012 4-17 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 4/Ch04.docx for water supply source was determined to be the purchase of water from SPU. A contract has been negotiated between the City and SPU. With this contract, Renton will become a part of the Saving Water Partnership (WSP), a consortium of water utilities that have contracts with SPU. The WSP regional partnership brings a panoply of water conservation measures and technical assistance that will be initiated in the Renton service area beginning in 2012. These new programs will extend the City’s conservation program from primarily residential customers to include, owners/ managers of apartments and condos, industrial and commercial customers, and will apply to new construction and major remodels as well as existing buildings. It will also help lower summer use through peak reduction as well as overall consumption reduction. Table 4.7 presents the measures, rebates, and resources that will become part of the City’s conservation program in 2012. The specific measures offered will change in 2013 with the 2013 SPU Water System Plan. New measures will reflect developing regional conservation needs. Table 4.7 Saving Water Partnership Conservation Measures and Strategies TYPES OF MEASURES TYPES OF STRATEGIES Residential Indoor Replace washing machines WashWise rebates Replace toilets, showerheads & faucets (multifamily) Free showerhead distribution to multifamily properties Fix leaks (toilets) Multifamily and single family toilet rebates Change behaviors (toilet flushes, faucet use, shower , full loads) Multifamily building owner and operator recruiting Behavior messaging Collaboration with energy utilities Program recruiting through media, direct mailing, web, interactive photo contest Promotion of WaterSense toilet performance Residential Landscape Reduce peak water use Irrigation system efficiency rebates Irrigation system performance Right Plant/Right Place promotion via retailer partnerships (nurseries, home & garden centers) Landscape watering behaviors Savvy Gardener e-newsletter and classes December 2012 4-18 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 4/Ch04.docx Table 4.7 Saving Water Partnership Conservation Measures and Strategies TYPES OF MEASURES TYPES OF STRATEGIES Practices that affect watering (e.g. mulch, soil prep and plant selection) The Garden Hotline Natural Lawn & Garden Guides (how-to materials) Trainings for irrigation professionals Development of standards for irrigation component performance through Irrigation Association Smart Water Application Technologies Initiative On-line weather data, watering index and irrigation scheduling tools Commercial Process/Domestic Upgrade equipment efficiency for cooling, process other industrial uses Small and large business targeting Improve building cooling performance Restaurant targeting – Commercial Kitchen Equipment Program Partnership with multiple energy and water utilities Upgrade efficiency of specific water consuming medical and lab equipment Outreach to business groups through Resource Venture Outreach to ethnic businesses Technical assistance, assessments, workshops New construction incentives Financial incentives (custom projects & standard rebates) Upgrade equipment efficiency for cooling, process other industrial uses Targeted promotion through vendors, trade groups, agencies Outreach to business groups through Resource Venture Commercial Landscape Improve watering efficiency Targeted outreach to large commercial customers Upgrade irrigation equipment (controllers, rain sensors, drip) Provide site-specific recommendations and technical assistance December 2012 4-19 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 4/Ch04.docx Table 4.7 Saving Water Partnership Conservation Measures and Strategies TYPES OF MEASURES TYPES OF STRATEGIES Improve scheduling & maintenance Financial incentives (custom projects and set rebates) Targeted recruiting and promotion to large commercial customers Market transformation by establishing and building vendor and contractor relationships On-line weather data, watering index and irrigation scheduling tools Trainings for irrigation professionals SUPPORTING ELEMENTS Youth Education (Supports Savings In Other Sectors) Build conservation awareness and residential measures Support of water festivals and events Educator resources on-line Classroom and take-home materials and devices Web-based interactive activities Overall Messaging (Supports Savings In Other Sectors) Conservation awareness supporting recruitment of residential and commercial customers Targeted marketing Collaboration with Puget Sound-based Partnership for Water Conservation Festivals, utility “open house” events Program Evaluation (Supports Savings In Other Sectors) Evaluate measure savings Conservation Potential Assessment Evaluate program effectiveness Annual reports Customer baseline surveys of attitudes and behaviors December 2012 5-1 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 5/Ch05.docx Chapter 5 POLICIES, CRITERIA AND STANDARDS 5.1 INTRODUCTION The City of Renton Water System Plan is based upon the following mission statement for all City utilities, including the City water system: “The City strives to protect the environment and empowers its citizens to be engaged in sustainability programs. The City manages its water system in a manner that ensures public health and safety, meets all regulatory requirements, and protects environmental resources.” (Source: Renton Results – A Community Accountability Program) The policies, design criteria, and standards used in the water system plan are based on laws and policies that originate from the following sources, listed in descending order, from those with the broadest authority to those with the narrowest:  Federal Regulations - Environmental Protection Agency.  State Regulations - Department of Health and Department of Ecology.  King County Regulations.  City of Renton Ordinances - City Council.  City of Renton Administrative Policies – Mayor.  City of Renton Comprehensive Plan.  Department Policies - Public Works Department.  Water System Plan Utility Policies – Utility Systems Division/ Water Utility Staff. Law is set by the federal government through federal regulations, by the State of Washington in the form of statutes: Revised Codes of Washington (RCW), WAC, by King County in the form of policies, and by Renton City Council in the form of ordinances and resolutions. City policies are established in order to provide a vision or mission of the Water Utility and to provide a framework for the planning, design, operation, management, and maintenance of the water system. City policies cannot be less stringent or in conflict with adopted laws. 5.2 SERVICE AREA, POLICIES, AND STANDARDS The City of Renton manages its water utility and water system in accordance with established federal and state regulations for public water systems. City policies and standards set forth in this chapter provide a consistent framework for the planning, design, construction, maintenance, operation, and service of the City’s water system and water supply sources. The City has additional land use, development, and finance policies that December 2012 5-2 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 5/Ch05.docx specify additional requirements for new development or redevelopment projects which require water service for domestic, fire protection and for other uses. The City’s policies are grouped by major categories including:  Service Area.  Water Supply Planning and Management.  Water Main Extension and Service Ownership.  System Reliability and Emergency Management Plan.  Fire Protection.  Financial.  Facilities.  Organization. 5.3 SUMMARY OF POLICIES FOR WATER SYSTEM PLAN 5.3.1 Service Area 5.3.1.1 Mission Statement Ensure that Renton’s drinking water supply is safe and sufficient and that the City’s infrastructure is adequate to meet our community’s present and future needs for water1. 5.3.1.2 Service Availability The City of Renton’s goal is to provide water service to all customers within the City’s retail water service area in a timely and reasonable manner consistent with applicable City policies, resolutions, ordinances, the Municipal Water Law, Washington Department of Health rules and guidelines, and applicable federal, state, and local laws and plans2. 5.3.1.3 Government Consistency Provisions of water service should be consistent with the goals, objectives, and policies of Renton Comprehensive Plan and Water System Plan. The City’s Water System Plan will be consistent with local, county, and state land use authorities and plans. Water service should be consistent with the growth and development concepts directed by the City’s Comprehensive Plan3. 1 Sources: Comprehensive Plan policy number U-36, Outcome Management for Water Utility Service Delivery Plan 2 Sources: WAC-246-290, Municipal Water Law, Comprehensive Plan, Water System Plan. 3 Sources: WAC-246-290, Renton Comprehensive Plan Policies U1, U-48, Water System Plan. December 2012 5-3 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 5/Ch05.docx 5.3.1.4 Existing Water Service Area and Retail Water Service Area The City’s Water Service Area is established in accordance with the East King County Coordinated Water System Plan and the Skyway Coordinated Water System Plan. The City also has inter-local agreements with neighboring cities and water districts to address minor adjustments of service area boundaries. In general, the City’s water service area is wholly located within incorporated City of Renton with the exception of several very small areas within unincorporated King County. The City uses its existing service area agreements to determine areas where water service will be provided. Therefore, annexations to the City do not affect the provisions of water service. The City’s Retail Water Service area encompasses the majority of the City’s Water Service Area, where the City has existing distribution mains or where distribution mains can be extended in a reasonable timeframe4. 5.3.1.5 Future Retail Water Service Area The only potential changes to the City of Renton retail water service area is for a small area near the westerly City limits, the area is shown on the service area map. This area is currently served by Seattle Public Utilities and may be served by the City in the future upon annexation. The future annexation area to be served by the City is also described in Skyway Water & Sewer District Water System Plan and in the Skyway Coordinated Water System Plan. For the purpose of the Water System Plan, the City has no intention or need to designate a Future Retail Water Service Area. 5.3.1.6 Urban Growth Area The City’s urban growth area (UGA) boundary extends beyond Renton’s city limits and water service area boundary. Other water purveyors serve areas outside of the City’s water service area. Due in large part to the geography of the City of Renton, it is unlikely that its water service area would be extended further beyond the existing water service area. Any new areas within the City’s UGA that are annexed by Renton would likely continue to be served by the other utilities currently serving them5. 5.3.1.7 Satellite/Remote Systems The City does not allow satellite/remote systems. 5.3.1.8 Service for Annexations without Existing Municipal Water Supplies The City intends to provide water service to areas annexed to the City that do not have existing water service from other municipal water suppliers and water districts. Service 4 Sources: WAC-246-290, East King County Coordinated Water System Plan, Skyway Coordinated Water System Plan, Renton Comprehensive Plan Policy U-48, Water System Plan. 5 Source: Renton Comprehensive Plan, Water System Plan. December 2012 5-4 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 5/Ch05.docx extension by the City may be considered under such conditions only if the City’s costs are recovered and sufficient financial resource is available and that service to annexations will not decrease the level of service to existing customers or increase the cost of service to existing customers6. 5.3.1.9 Service for Annexations with Existing Municipal Water Supplies The City will not provide water service to areas annexed to the City that are already served by other existing municipal water suppliers or water districts. Areas annexed with existing municipal supply must meet the City water utility standards7. 5.3.1.10 Service for Protection of Public Health The City will allow extension of water service without annexation to areas outside of the City limits when such areas are within the City’s water service area, or when no other reasonable service is available, and it is determined by the City and/or by the State Department of Health that a public health emergency exists or is imminent8. 5.3.1.11 Conditions for Service to Properties with Existing Private and or Exempt Wells The City will provide water service for domestic and for fire protection to properties within the City water service area that have existing private wells and/or exempt wells subject to the following conditions: 1. All “exempt” wells and private wells on the property must be decommissioned in accordance to Washington State Department of Ecology (Ecology) standards and regulations, except when such wells can be used by the City of Renton for purposes including but not limited to: water supply, water supply mitigation, resource protection, environmental monitoring, or remediation of contamination. 2. All water rights, permits or certificates, for which the type of use is municipal, community, or domestic, the water rights must be deeded to the City; and any associated source(s) must either be decommissioned or deeded to the City, at the discretion of the City. Water rights, permits or certificates, for which the type of use is irrigation, industrial, or agricultural may be retained if the proposed land use is consistent with the type of use listed on the water right. If the proposed land use is not consistent with the type of use listed on the water right, then the water right must be deeded to the City; and any associated source(s) must either be decommissioned or deeded to the City, at the discretion of the City. 6 Source: Renton Comprehensive Plan Policy U-46, Water System Plan. 7 Source: Renton Comprehensive Plan Policy U-47, Water System Plan. 8 Source: Renton Comprehensive Plan Policy U-45, Water System Plan. December 2012 5-5 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 5/Ch05.docx 5.3.1.12 Requests for Assumption by Water Districts or Private Water Systems The City may assume the operation of a water district or private water system at their request if the following conditions are met and subject to the approval of Renton City Council9: 1. The district or private system is adjacent to or within Renton’s water service area. 2. The district’s or private system’s facilities meet Renton’s performance criteria and engineering standards, or a plan is in place to assure that they will be brought up to Renton’s standards without adversely impacting Renton’s existing customers financially or with regard to level of service. 3. The assumption of the district or private system is permitted by State law. 4. The City shall require that the district or private system to transfer the ownership of its water supply sources and associated water rights to the City. Water rights must be successfully transferred to the City and approved for municipal water use by the State Department of Ecology prior to commitment from the City for water service. 5.3.1.13 City Initiated Assumption of Water Districts or Private Water Systems The City will seek to assume the operation of a water district when the City Council determines that the assumption is in the best interest of the City and the assumption is consistent with the City’s Comprehensive Plan. The City will follow State laws and guidelines in assuming portions of adjacent water systems as a result of annexations10. 5.3.1.14 Wholesaling Water The City will continue to provide wholesale water to Skyway Water and Sewer District through a single metered connection in accordance to the current wholesale water supply agreement between the City and the District. The City is not planning to provide additional water to the District above the quantity identified in the existing wholesale agreement. The City has no plans to sell water wholesale on a long term basis to any other purveyor. Sales of water for short term basis will be evaluated in a case by case basis. 5.3.1.15 Wheeling Water The City does not currently wheel water. Water chemistry compatibility and its effects on water quality, including aesthetics such as taste and odor would be a primary consideration. The City will evaluate any request for wheeling water on a case by case basis. 9 Source: RCW, WAC, City of Renton Comprehensive Plan policy number U-49, Water System Plan. 10 Source: RCW, WAC, Council Discretion, Renton Comprehensive Plan policy number U-49, Water System Plan. December 2012 5-6 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 5/Ch05.docx 5.3.1.16 Water Service to Properties in King County and within Renton Retail Water Service Area As a result of numerous annexations to the City up to 2012, there is currently one remaining developed area within unincorporated King County that is within the City’s Retail Water Service Area (RWSA). The City has adequate existing water infrastructure in this area and is currently providing water service to all existing residences within this area known as the Sierra Heights Div. 3 and 4 and the Western Hills subdivisions. For any new development or redevelopment projects within the above unincorporated King County and within the City’s RWSA, the City intends to provide “timely and reasonable water service” consistent with State Law RCW 19.27.097 and with the “Guidelines for Determining Water Availability for New Buildings” as adopted by the Washington State Department of Health and the Department of Ecology. For all new development and redevelopment projects and building permit applications requiring a “King County Certificate of Water Availability”, the City typically processes and issues the requests for water availability within one week of our receipt of the applicants’ written requests. Developers’ extensions of water mains will be required to provide water service for domestic and for fire protection to all new development and redevelopment projects. The City typically reviews the civil plans for water main extensions within two weeks of our receipt of the plans and the plans are approved as soon as our review comments have been addressed. The City also coordinates with King County to assure that all county road permits are obtained and that all fees are paid to the county for plan review and for inspection of the roadway restoration related to the construction of the water lines within the county roads. The City charges a higher water commodity rate to customers that are outside of the City limits and within the City’s RWSA, at 1.5 times the inside City Limit water rate. The higher rate is necessary for the City to recover additional costs incurred for obtaining King County right-of-way permits for the installation, maintenance, repair of water mains, water service lines, hydrants and related appurtenances within the county roads. The City must also relocate its water mains at its own cost, when directed by King County under franchise agreement to accommodate future County roadway improvement work and the roadway overlay program. 5.3.2 Water Supply Planning and Management Policies 5.3.2.1 Water Supply Planning It is the City’s goal to have system-wide supply sources, treatment, pumping and storage facilities to meet the current and projected maximum daily demand (MDD) – with the largest source out of service - in accordance to WAC 246-290-222. The City will work cooperatively with water suppliers and purveyors, including Seattle Public Utilities, to assure reliable water supply at the lowest environmental and economic cost. December 2012 5-7 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 5/Ch05.docx The City will pursue additional and/or new water supply and use water conservation, water use efficiency measures and water reuse programs to meet to ensure adequate water supply needs to meet the essential needs of the community and water demand created by growth targets established through the Growth Management Act (GMA) planning process. Adequate” supply is enough water to meet normal peak day demands of the City’s customers. Peak day demand includes the effects of drought and curtailment. As time passes, normal demand is expected to decrease on a per household basis for two reasons. First, average household size is expected to decline, reducing the number of water users per house. Second, continued efforts to use water wisely by all customers will reduce demand. The City intends to take a cautious approach toward demand reductions that result from behavioral changes, which will not be considered permanent. Alternately, structural improvements (e.g., low-flush toilets, low-flow shower heads, or other water- saving devices) will be considered permanent reductions in demand. The City supports efficient use of water. The City supports eliminating the “waste” of water. The City has adopted rates to achieve these objectives. The quantity of water at the source shall: (1) be adequate to meet the maximum projected water demand of the retail service area as shown by calculations based on the extreme drought of record; (2) provide a reasonable surplus for anticipated growth; (3) be adequate to compensate for all losses such as silting, evaporation, seepage, etc.; and (4) be adequate to provide ample water for other legal users of the source11. 5.3.2.2 Regional Water Supply Planning The City will participate in regional water supply management and planning activities. The City will monitor legislative, regulatory, litigation, and planning activities that may impact or influence the adequacy or reliability of supply12. 5.3.2.3 Water Supply and Resources Management The City will practice and support water resource management that achieves a maximum net benefits for all citizens and promotes enhancement of the natural environment. The City operates and monitors its water supply sources to ensure compliance with all conditions and withdrawal quantities limits for total annual withdrawal quantity and for instantaneous withdrawal quantity, established under State issued water rights certificates and permits. The City will monitor the pumping of its wells to allow aquifer recovery and to avoid impacts to in-stream flows for the Cedar River. The City has installed flow control/throttling valves and flow metering equipment system on its well pumps to monitor instantaneous pumping rates and total pumping rates. The 11 Sources: WAC 246-290-420, WAC 246-290-200, RCW 19.27.097, RCW 58.17.110, Renton Comprehensive Plan policy numbers U-36, U-42, U-54, Water System Plan. 12 Source: Council and Administration Discretion. December 2012 5-8 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 5/Ch05.docx controls are set up so that the well pumps cannot exceed their individual and total instantaneous flow rates established under the water rights certificates and permits issued by the Department of Ecology. In the demand calls for additional water, the controls are set up so that the City will receive additional water through the intertie with Seattle Public Utilities’ 60-inch Bow Lake pipeline, and if needed through two other interties with SPU at Tiffany Park and Fred Nelson pump stations13. 5.3.2.4 Reclaimed Water Use The City will support the regional supplier’s study of reclaimed water use opportunities and will work with King County Department of Natural Resources to identify potential reclaimed water users and demand. Any reclaimed water to be used as a source of supply should only be provided through regional water suppliers. The City has identified several potential users of reclaimed water for landscape irrigation uses, including the Boeing Longacres facilities14. 5.3.2.5 Conservation and Water Use Efficiency The City will actively continue to promote voluntary conservation and the wise use of water and implement a water conservation program and measures consistent with the requirements of the Department of Health. The City will cooperate with Seattle Public Utilities to meet SPU and other regional conservation goals. The City has implemented water rate structures promoting conservation such as, residential inverted block rate and higher commodity rate for commercial and multifamily irrigation. The City is finalizing negotiations for a procurement contract for the acquisition and phased implementation of an Automatic Meter Reading (AMR) system to enhance water conservation activities and to optimize the pumping of its water supply wells15. The City has adopted the following Water Use Efficiency goals:  Reduce distribution system leakage and loss to 10% or less by 2010.  Limit peak day demand to 16.5 mgd or less through 2015.  Continue to have 0.5% average annual reduction of water use per connection per year. 5.3.2.6 Water Shortage Response Plan The City maintains and updates a local response plan in case of a water supply shortage caused by a drought or supply interruption. The City will implement necessary water conservation measures to avoid curtailment in all but the most exceptional circumstances. 13 Source: Municipal Water Law, Water System Plan, Water Rights Certificates and Permits. 14 Source: Municipal Water Law, Water System Plan 15 Source: WAC 246-290, Water System Plan, WUE Goals December 2012 5-9 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 5/Ch05.docx The Mayor and/or City Council are empowered to declare an emergency and to carry out the necessary actions to ensure compliance with the Water Shortage Response Plan16. 5.3.2.7 Emergency Interties The City has emergency interties with adjacent water systems for short-term emergency uses. The City will evaluate requests for emergency interties on a case by case basis and shall support emergency interties with adjacent systems if they benefit both providers and if they don’t compromise the City’s ability to serve its existing customers or its future supply needs. 5.3.2.8 Water Quality The City shall operate and manage the system to provide water quality that meets or exceeds all health requirements. The City will take steps to meet or exceed all water quality laws and standards. The City will take all reasonable measures to ensure that water reaching the point of delivery, the customer’s meter, meets all water quality standards. The City shall continue to maintain and upgrade its system to provide the best water quality and service17. 5.3.2.9 Cross Connection Control The City shall administer a cross connection control program that protects the City’s public water supply and users of the public water supply from backflow contamination in accordance with state law and to the Department of Health regulations and guidelines. The City has an established cross connection control program and related ordinances and procedures to implement the program. The City shall submit an Annual Summary Report to the Department of Health18. 5.3.2.10 Wellhead Protection Program The City has a Wellhead Protection Plan which was approved by the Department of Health in December 1999. Updates of the plan are described in Appendix L of this Water System Plan. The Wellhead Protection Plan will be reviewed and updated, if necessary, at least every six years (in conjunction with the Water System Plan update). 5.3.2.11 Aquifer Protection Program In 1998, the City established an Aquifer Protection Program and adopted ordinances, policies, standards, and regulations for existing and new development within the City’s 16 Source: WAC 246-290, Water System Plan 17 Source: EPA, Safe Drinking Water Act, Council Discretion, WAC 246-290-310, WAC 246-290-135. City of Renton Comprehensive Plan policy numbers U-35, U-37, U-38, and U-39. 18 Sources: WAC-246-290-490, Water System Plan December 2012 5-10 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 5/Ch05.docx aquifer protection areas to protect the aquifers from potential contamination by hazardous materials. 5.3.3 Water Main Extension And Service Ownership 5.3.3.1 Orderly Extension of Utilities All utilities within the City of Renton will be extended in an orderly manner, in and along routes which comply with the City’s Comprehensive Plan and Water System Plan. All City utilities will be extended and installed in a manner as to best serve the citizens of Renton19. 5.3.3.2 Extension Across Full Frontage of Properties All water main extensions shall extend to and across the full width of the property served with water. No property shall be served with City water unless the main is extended to the extreme boundary limit of the property line extending the full length of the front footage of the property. Provisions shall be made wherever appropriate in any project for looping all dead end or temporary dead end mains. Provisions for stubs shall be made to serve adjacent properties20. 5.3.3.3 Sizing of Water Mains All water mains shall be sized based on fire flow requirements, densities/land uses anticipated in the City’s Comprehensive Plan and Water System Plan. A hydraulic analysis is required to confirm adequate system design. The analysis shall be used to verify flow demands and pressure availability for the proposed project. The analysis shall demonstrate the effect of the proposed project will have on the existing distribution system. The hydraulic analysis shall include, as a minimum, the following: 1. Under peak hour demands (excluding fire demands), the water distribution system shall maintain pressures above 40 psi. 2. Under maximum day demand plus fire demands, the water system shall maintain pressures above 20 psi. 3. Velocity in any water main shall not exceed 8 feet per second under any condition. 4. Water system layout shall be designed to minimize dead ends. Looping water lines is a standard practice to eliminate dead ends. 5. The minimum size of water mains with fire hydrants in a residential area shall be 8- inch diameter. Short segments of smaller mains in short segments may be allowed for water quality reasons provided that fire flow requirement can be met through larger mains. 19 Source: City of Renton Resolution No. 2164, Comprehensive Plan, Water System Plan. 20 Sources: Renton Ordinances 3541, 2849, Renton Development Regulations 4-6-010, Water System Plan December 2012 5-11 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 5/Ch05.docx 6. The minimum sizing for water mains with fire hydrants in the City’s Central Business District, Urban Center, Commercial and Industrial Corridors, and Sunset Reinvestment Strategy Area shall be 12-inch diameter or larger depending on fire flow demands.21 5.3.3.4 Requirements for Looping of Water Mains When the required fire flow for a development is over 2,500 gallons per minute, the fire hydrants shall be served by a water main which loops around the building or complex of buildings and reconnect back into a distribution supply main. All fire hydrants shall be served by a municipal or quasi-municipal water system, or as otherwise approved by the Fire Marshal22. 5.3.3.5 Design of Water Main Extension All water main extensions must be designed by a professional engineer, registered with the State of Washington, and shall conform to the latest City design criteria, development regulations, other City adopted standards, and sound engineering practices. Plans must be submitted to the City for review and approval prior to the issuance of utility construction permits. Plan review fees shall be paid to the City at the time of the submittal of the plans. All water mains shall be sized based on fire flow requirements, densities/land uses anticipated in the City’s Comprehensive Plan and Water System Plan23. 5.3.3.6 Construction of Water Main Extension All extensions of City water mains and related appurtenances must be constructed by a licensed and bonded contractor, or by City forces, and shall conform to the latest City construction and development regulations and standards and other City adopted standards and approved project civil plans. The applicant/owner/developer/contractor must pay all permits fees and related charges, obtain the required permits, and construct the new water mains, at its own costs24. 5.3.3.7 Oversizing of Water Main Extension The City reserves the right, upon the approval of City Council (Council), to participate in the installation of any oversized water line extensions or additional water or extra improvements related to such installations. In general, subject to Council’s approval, the City may pay for the difference in material costs between the required main sized and the larger main size25. 21 Source: City Development Regulations, Water System Plan, Department of Health Water System Design Manual 22 Source: City Ordinance No. 4007, City Development Regulations, Water System Plan. 23 Source: City’s Comprehensive Plan, Water System Plan, Development Regulations. 24 Source: City’s Comprehensive Plan, Water System Plan, Development Regulations. 25 Sources: Ordinance No. 2434, City’s Comprehensive Plan, Water System Plan, Development Regulations. December 2012 5-12 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 5/Ch05.docx 5.3.3.8 Water Main Extension - Exception The City may defer compliance with Renton water utility standards in the case of temporary or emergency water service. All temporary and emergency waivers must be approved by the Public Works Administrator26. 5.3.3.9 Water Service and Water Meter Ownership/Responsibility The City shall own and maintain the service line from the main line to the meter, the meter and setter, and the meter box. The property owners shall own and maintain the private water service line and other facilities such as pressure-reducing valves, backflow prevention assemblies, etc. beyond the City’s water meter. For fire sprinkler systems, the City’s ownership will end at the connection point or connecting valve to the water main. The City shall own the detector meter on the backflow prevention assembly27. 5.3.3.10 Requirement for Water Meters Any person desiring to have premises connected to the City water system shall make application for water meters and pay all required fees. All fire sprinkler systems connected to the City water system shall have meters or detector-meters and shall have required backflow prevention assemblies. New water meters, additional water meters, larger water meters, landscape irrigation meters, fire protection meters and detector meters, will trigger water system development charges28. 5.3.3.11 Water Main Extension by Developers All water main extensions including fire hydrants, valves, water services stubs, meters, and related appurtenances, with the exception of private fire sprinkler lines and systems, shall be conveyed, at no cost, to the City for ownership, maintenance and operations, after the City’s acceptance of the water main extensions. As-built plans, easements and bill of sales shall be provided to the City for the conveyance of the water mains, hydrants, water meters, and related appurtenances. 5.3.3.12 Late-comer Agreements The City has discretionary power to grant latecomer’s agreements to owners and developers for pro rata portion of the original costs of water main extensions. The authority to approve a latecomer’s agreement is vested in the City Council. The latecomer’s agreement can be granted for a period up to but not exceeding 15 years and no term extension will be granted29. 26 Source: City of Renton Comprehensive Plan policy number U-53, Water System Plan. 27 Sources: City Development Regulations, Water System Plan, Water Standard Details. 28 Sources: Municipal Water Law, City Ordinances, City Development Regulations, Water System Plan. 29 Sources: City Ordinance 4443, Renton Municipal Code 9-5. December 2012 5-13 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 5/Ch05.docx 5.3.4 System Reliability and Emergency Management Plan 5.3.4.1 Service Reliability The City has built in redundancies in the operation and in the construction of capital improvements of its water system, including reservoirs, pumps, pressure reducing stations, and transmission and distribution mains, to maintain service reliability. The City has water system interties with SPU and emergency interties with neighboring water purveyors to provide water service during emergencies. All new water facilities added to the system that require electrical power shall be provided with backup emergency electrical power with automatic start and automatic transfer to and from commercial power. The power source may be an electrical generator or storage batteries. Existing facilities requiring electrical power that do not have on-site emergency electrical power with auto-start / auto transfer shall have such capabilities added as part of the capital improvement program within the next 15 years. Emergency back-up power for sources and booster pump stations shall be capable of operating at full load without being refueled for at least 36 hours. Battery backup power for SCADA RTUs and MTUs shall be capable of providing power for at least eight hours of continuous operation without needing a recharge or replacement. Wells and booster pump stations that do not have emergency power with automatic start and automatic transfer to and from commercial power are not considered reliable, because they cannot be relied upon to provide water during a fire. If at sometime in the future installed storage is adequate to meet fire flow demands, then this policy could change. Booster pump stations shall be equipped with redundant pumps so as to meet the MDD with the largest pump serving the pressure zone out of service30. 5.3.4.2 Emergency Preparedness The City has an adopted Comprehensive Emergency Management and Hazard Mitigation Plan developed in accordance to FEMA standards, to address issues related to continuity of water service, long-term system recovery and to ensure the orderly and full restoration of the water system after an emergency. The City is continually updating its Water System Emergency Response Plan as part of its operations program, and as new facilities are brought into operation. 5.3.4.3 Vulnerability Assessment The City has completed a Security Vulnerability Assessment of its water system in compliance with the Public Health Security and Bioterrorism Preparedness Act of 2002 as 30 Sources: WAC 246-290-420, DOH Water System Design Manual, Council Discretion, Water System Plan. December 2012 5-14 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 5/Ch05.docx directed by USEPA. The City has phased in the design and construction of the recommended security upgrades as part of the Capital Improvement Program31. 5.3.4.4 Multiple Sources of Supply The City will develop supplies which, when combined, meet the DOH demand criteria. The City will maintain and execute data collection strategies and record keeping procedures that quantify the average day and peak day demands of each customer class. The City will develop supplies which meet the anticipated maximum day demand (based on customer demand patterns, weather, and growth) with the largest of the supply sources not included32. 5.3.5 Fire Protection Policies 5.3.5.1 Fire Protection Responsibility The City shall continue to maintain and upgrade its water system infrastructure to deliver adequate water for fire protection to all residential, commercial, industrial customers, schools and other public facilities served with City water. The City shall continue to perform routine maintenance on all of its fire hydrants and valves to keep them in working order. The City shall continue to replace its old and undersized water mains with adequate size mains to provide the required level of fire protection. 5.3.5.2 Fire Flow Requirements for New Construction New development, redevelopment, subdivisions, and tenant improvements projects within the City will be required to provide the minimum fire flow requirements as established by the City’s Fire Marshall. It is the developer’s responsibility to install, at its own cost, all water system facilities including off-site and on-site main line extensions and upgrades to meet the required fire flow demand and applicable City’s development regulations and standards. If the off-site improvements result in regional benefit, the developer may request the City to cost participate in the construction of the improvements. If the off-site improvements benefit other adjacent properties, the developer may request a latecomer agreement to recoup equitable costs from future development of properties within the latecomer boundary which can benefit from the improvements. 5.3.5.3 Fire Flow Requirements for Existing Construction Existing structures are not required to upgrade the City’s water system infrastructure to meet current fire flow and development standards. Redevelopment of existing structures, including remodeling, expansions, additions, change of occupancy and use can trigger the 31 Source: WAC 246-290-221,-222,-230 & -235, DOH Water System Design Manual 32 Source: RCW 90.54.180,90.42.005,,WAC 246-290-420, Comprehensive Plan Policy U-41, Water System Plan. December 2012 5-15 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 5/Ch05.docx requirements for upgrades to the water system. The City is not obligated to upgrade existing system to meet current codes. As part of its capital improvement program the City continues to systematically replacing its old and undersized water mains to bring them to current standards with a goal to provide a minimum fire flow of 1,000 gallons per minute (at 20 psi residual pressure), and to install fire hydrants at 500 feet spacing, throughout the distribution system. 5.3.5.4 Fire Flow Quantity The minimum fire flow requirements for one- and two-family detached dwellings having a fire flow calculation area which does not exceed 3,600 square-feet shall be 1,000 gallons per minute at 20 psi residual pressure. Fire flow for one- and two-family dwelling larger than 3,600 square-feet shall be at least 1,500 gallons per minute or more and shall be determined by the City Fire Marshall. Fire flow quantities and fire flow durations requirements for all other buildings shall be determined by the Fire Marshall. 5.3.5.5 Fire Flow Storage The City’s fire flow storage policies are described in the Facilities Policies. 5.3.5.6 Fire Hydrants All fire hydrants shall be equipped with Storz adapters on the pumper ports. See current City design standards for specifics. All fire hydrant feed lines shall be equipped with gate valves (foot valves). The minimum size of feed lines to fire hydrants shall be six-inch diameter. Fire hydrant lines over fifty feet long shall be 8-inch diameter. 5.3.6 Financial Policies 5.3.6.1 Fiscal Stewardship The Water Utility will follow financial policies and criteria adopted by City Council. Water Utility funds and resources shall be managed in accordance with applicable laws, standards, City financial and fiscal practices and policies. The financial criteria include rate stabilization, establishment of fund balance and operating reserves, maintaining the desired debt service coverage. 5.3.6.2 Enterprise Fund – Self-sufficient Funding The Water Utility shall be operated as a self-supporting enterprise fund. Revenues to the Water Utility primarily come from customer charges from water sales, system development charges, plan review and inspection fees. Detailed information on the City’s financial December 2012 5-16 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 5/Ch05.docx program are presented in Chapter 10.33 5.3.6.3 Rate Stabilization The City’s financial goal is to minimize and stabilize the long-term, life-cycle cost of service. Rates and additional charges shall be cost-based to recover current, historical, and future costs associated with the City’s water system and services.34 5.3.6.4 Operating Reserve The City’s goal is to stabilize the Water Utility funds and maintain an operating reserve of 12% of annual operating expenses for operation of water system for 30 to 45 days.35 5.3.6.5 Debt Service The City’s goal is to maintain a desired reserve for debt service coverage of 1.25 times of the annual financial obligations.36 5.3.6.6 Bonds vs. Cash Expenditures:  All non-Capital Investment Programs (CIP’s) shall be paid for by rates.  All system reinvestment, maintenance, replacement and rehabilitation projects shall be paid for by rates.  CIP’s for new infrastructure to accommodate growth or to increase system capacity can be paid for using bonds37. 5.3.6.7 Comprehensive Planning Comprehensive plans for water systems should be updated every six years, using a 20- year or greater planning horizon, as required by State law and financial policies shall be reviewed and updated as needed. The City has a 6-year Capital Investment Program (CIP) which is updated with each biennial budget cycle. 5.3.6.8 Equitable Rates The City’s rates and charges shall be equitable to recover costs from customers commensurate with the benefits they receive and to provide an adequate and stable source of funds to cover the current and future cash needs of the City Water Utility. Rates shall be 33 Source: Council Discretion, Water System Plan 34 Source: Council Discretion 35 Source: Council Discretion 36 Source: Council Discretion 37 Source: Council Discretion. December 2012 5-17 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 5/Ch05.docx developed using the cash basis to determine the total revenue requirements of the Water Utility. Rates should be calculated for the service area as a whole38. 5.3.6.9 Outside-City Rates For customers residing outside the city limits, water rates are 1.5 times the residential city rates39. 5.3.6.10 Discounted Rates The City shall provides a senior and/or disabled citizen discount on City water rates40. 5.3.6.11 Other Fees and Charges Owners of properties that have not been assessed or charged an equitable share of the cost of the City’s water system shall pay, prior to connection to the system, one or more of four charges: 1. System development charge 2. Special assessment charge 3. Latecomer's fees 4. Inspection/approval fees 5. Water meter installation fees41 5.3.6.12 Ancillary Charges Customers should be charged for supplemental, special purpose services through separate ancillary charges based on the cost to provide the service. Ancillary charges create more equitable fees and increase operating efficiency for services to customers. Revenue from ancillary charges should be used to offset operations and maintenance costs42. 5.3.6.13 Inflation Rate The inflation rate should be based on information provided by the Finance Department 38 Source: Council Discretion, Water System Plan. 39 Source: Council Discretion 40 Source: Council Discretion 41 Source: City Development regulations 42 Source: Council Discretion, Water System Plan. December 2012 5-18 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 5/Ch05.docx 5.3.7 Facilities Policies 5.3.7.1 System Pressure The existing facilities will be operated and new facilities constructed to ensure compliance with DOH and ISO criteria for maximum and minimum pressure. The City will provide the minimum water pressure requirement established by Department of Health at 30 psi at the service meter during maximum day demand and during peak hour demand conditions, not including a fire or emergency. The City’s goal is to provide a minimum of 40 psi at the highest domestic water plumbing fixture or at the highest fire sprinkler head, except during emergency conditions. The City’s goal is also to provide a maximum of 110 psi at the service meter to prevent over pressurization of water uses fixtures and appliances. Current building codes require the installation of an individual pressure reducing valves beyond the water meter where system pressures exceed 80 psi. During a failure of any part of the system, the maximum pressure shall not exceed the normal pressure rating of the pipe, generally 150 psi43. 5.3.7.2 Velocity The existing facilities will be operated and new facilities constructed to minimize damage from excessive pipeline velocities. When adding to the distribution system or replacing components of the distribution system, water mains shall be sized such that:  Under normal conditions, the velocity of water in a transmission main shall be less than 4 feet per second (fps) during demand periods.  Under emergency conditions, such as a fire, the velocity of water in a transmission main shall be less than 8 fps. Fire flow planning and modeling will use a de-rating procedure that limits fire flow velocities to 8 fps44. 5.3.7.3 Storage The existing storage facilities will be operated and new storage facilities constructed to comply with DOH criteria and good engineering practice. Storage within the distribution system must be of sufficient capacity to supplement transmission supply when peaking demands are greater than the source pumping capacity (equalizing storage) and still maintain sufficient storage for a fire or other emergency condition. Equalizing, fire suppression, and stand-by storage are provided in addition to operational storage. 43 Source: WAC 246-290-230, Insurance Services Organization (ISO), Council Discretion, Water System Plan 44 Source: DOH Water System Design Manual, Fire Marshall, Insurance Services Organization (ISO), Council Discretion, Water System Plan. December 2012 5-19 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 5/Ch05.docx The bottom of the equalizing storage component must be located at an elevation which produces no less than 30 psi at all service connections throughout the pressure zone under peak hour demand conditions, assuming all sources are in service. Equalizing storage requirements shall be determined using the “Multiple Day Demand” method (ref: DOH Water System Design Manual, December 2009). The time period shall be five days. The analysis shall compare the cost of designing and constructing storage versus the cost of purchasing wholesale water from SPU, including the cost of upgrading and / or adding intertie connections to the SPU transmission mains. For fire flow supplied via gravity storage, the bottom of the fire suppression storage component shall be located at an elevation which produces no less than 20 psi at ground level at all points in the zone under peak hour demand condition, assuming the largest source to the zone is out of service. The fire flow storage criteria available from the ISO were considered in the study. The quantity of fire flow storage provided will approach these requirements as closely as possible, considering economic factors and other design criteria. Sufficient storage for a fire condition is the product of the fire protection water demand and the required duration as determined by the City of Renton Fire Marshall. The stand-by storage component or the fire suppression storage component, whichever volume is smaller, can be excluded from the zone’s total storage requirement (also known as “nested” storage) provided that the elevation of the bottom of effective storage is no less than that elevation which produces the higher of the following criteria:  20 psi at ground level at all points in the zone under peak hour demand conditions, assuming the largest source to the zone is out of service, or  30 psi at all service connections throughout the pressure zone under peak hour demand, assuming all sources are in service. The calculation of the standby storage volume requirements shall use the “Water Systems with Multiple Sources” method (ref: DOH Water System Design Manual, December 2009). Location of storage facilities should be in areas where they will satisfy the following requirements:  Minimize fluctuations in system pressure during normal demands.  Maximize use of the storage facilities during fires and peak demands.  Improve the reliability of the supply for the water system45. 45 Source: WAC 246-290-235, Council Discretion, Water System Plan, Fire Marshall. December 2012 5-20 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 5/Ch05.docx 5.3.7.4 Pipelines and Water Services New water transmission and distribution pipelines and facilities shall be designed and constructed to comply with Department of Health criteria, American Water Works Association (AWWA) standards, the City of Renton latest design criteria and good engineering practice. Where possible, transmission and distribution mains shall be looped to increase reliability and decrease head losses. In residential areas, the grid of distribution mains shall consist of mains at least 8 inches in diameter. All 8-inch and smaller dead-end mains shall terminate with a blow-off assembly. In commercial, industrial, Central Business Districts and other areas with high fire flow demand, the grid of the distribution system shall consist of 12-inch or larger mains. All 12-inch and larger mains shall terminate with a fire hydrant. Distribution system design assumes that only adequately sized service lines will be used. All residential service lines will be 3/4-inch or larger copper. The service line from the main line to the meter shall be the same size as the meter. All water service lines shall conform to the plumbing code. Connections to the system shall comply with the City’s cross connection control standards. In general, the standard protection for commercial and industrial connections is the use of reduced pressure principle backflow prevention assembly devices. The preferred pipe material for distribution mains is ductile iron. Valve installations shall meet the following criteria:  Zone valves shall be located at all pressure zone interfaces to allow future pressure zone re-alignment without the need for additional pipe construction.  Isolation valves shall be located wherever necessary to allow individual pipelines to be shut down for repair or installing services. Four valves shall be provided per cross, and three valves per tee.  Isolation valves should be spaced along water mains at intervals not to exceed 500 feet.  Air/vacuum release valves shall be placed at all high points or “crowns” in all pipelines.  Individual service pressure reducing and check valves are recommended for all new customer service lines in the City. The pressure-reducing valves protect customers from high pressures in case of failure of a pressure-reducing station. Check valves prevent hot water tanks from emptying into the transmission main December 2012 5-21 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 5/Ch05.docx when the main is empty and prevent contamination of the system mains due to possible cross connections in the customer’s service46. 5.3.7.5 Booster Pumps The existing booster facilities will be operated and new booster facilities constructed to comply with DOH criteria and good engineering practice. All existing and future booster stations should be modified/constructed to comply with the following minimum standards: All structures should be non-combustible, where practical. All buildings should have adequate heating, cooling, ventilation, insulation, lighting, and work spaces necessary for on-site operation and repair. Underground vaults should be avoided where possible due to the increased potential of flooding, electrocution, and other hazards. Sites should be fenced to reduce vandalism and City liability where appropriate. Each station shall be equipped with a flow meter and all necessary instrumentation to assist personnel in operating and troubleshooting the facility. Emergency power capability (auto-start/auto-transfer) shall be provided to booster stations. Booster stations should be placed wherever necessary to fulfill the following criteria:  Provide supply redundancy to a pressure zone.  Improve the hydraulic characteristics of a pressure zone.  Reduce the cost of water supply.  Improve water quality (i.e., increase circulation)47. 5.3.7.6 Pressure Reducing Stations (PRV’s) The existing pressure-reducing facilities will be operated and new pressure-reducing facilities constructed to comply with DOH criteria and good engineering practices. All pressure-reducing valves should be placed in vaults that are large enough to provide ample work space for field inspection and repair of the valves. Vaults should be tall enough to allow operating personnel to stand erect. Vaults should drain to daylight or be equipped with sump pumps to prevent vault flooding. 46 Source: WAC 246-290-230, Council Discretion, Water System Plan. 47 Source: WAC 246-290-200, DOH Water System Design Manual, Council Discretion December 2012 5-22 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 5/Ch05.docx Each PRV station shall have a larger main (lead) PRV for fire flow demand and a smaller (lag) PRV for anticipated domestic demand. The smaller (lag) PRV shall a meter connected to the telemetry/SCADA system. Pressure-relief valves should be provided on the low-pressure side of the PRV to prevent system over-pressuring in case of a valve failure. High-pressure alarms should be transmitted to the central control cabinet to alert operating personnel of the PRV failure. When pressure at the service line connection point is such that the plumbing code dictates that water service requires a PRV (e.g., 80 psi) the customer is required to install, own, operate and maintain the PRV. The PRV shall be installed on the customer side of the water service48. 5.3.7.7 Supervisor Control and Data Acquisition (SCADA) Telemetry System The control and alarm system will be maintained and updated as necessary to optimize all policy goals. Controls must be capable of optimizing the operation of the water system’s components in response to reservoir levels, system pressures, abnormal system conditions, electrical power rate structure, and water costs49. 5.3.7.8 Construction Standards All new water system infrastructure shall be designed and constructed to comply with Department of Health criteria, AWWA standards, the City of Renton latest design criteria and good engineering practice. 5.3.7.9 Standard Useful Life for Design Distribution system pipes – 80 years Electrical equipment – 10 - 20 years (varies by type) Mechanical equipment – 10 - 20 years (varies by type) Structures – building shell – 50 years Structures – water storage – 50 years SCADA hardware and software – 10 years (technical obsolescence) HMI hardware and software - 5 years (physical limit / technical obsolescence) 48 Source: WAC 246-290-200, DOH Water System Design Manual, Water System Plan 49 Source: DOH, Water System Plan December 2012 5-23 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 5/Ch05.docx 5.3.7.10 Facilities Maintenance All City water facilities and related equipment will be maintained so that they perform at the level of service necessary to meet all operational policies and service delivery goals. Equipment breakdown are given highest maintenance priority and repairs should be made as soon as possible to restore the established level of service and for continuity of operation. Equipment should be scheduled to replaced or upgraded before they become obsolete or when spare parts are no longer available. Worn parts should be repaired, replaced, or rebuilt before they represent a high failure probability. A preventive maintenance schedule shall be established for all facilities, equipment, and processes. Spare parts shall be stocked for all equipment items whose failure will impact the ability to meet other policy standards. All maintenance personnel shall be trained in the procedures and techniques necessary to efficiently perform their job descriptions. The City ensures that Water Maintenance staff obtained the required state water works certifications by WAC 246-292, such as for Water Distribution Managers and/or Water System Operators, to maintain and operate the City’s water system. Maintenance shall be performed by the water maintenance staff and supervised by the Field Superintendent. Written records and reports will be maintained on each facility and item of equipment showing operation and maintenance history50. 5.3.7.11 Joint Use Facilities The City will participate in regional projects to the extent that the level of service is not compromised or the cost of service inequitable. All joint-use facilities must comply with Renton policy and design standards. Joint-use facilities which supply a portion of the City that cannot be supplied from other sources in the event the joint-use facility is out of service will be maintained by the City of Renton. Joint-use facilities will be pursued only in those areas that improve reliability or operating costs51. 5.3.8 Organizational Policies 5.3.8.1 Structure The Water Utility will be structured to provide the best level of service at the least cost. Utility staff level is established by City Council based of financial resources and desired level of service to be provided by the City. The Water Utility shall be part of the following divisions: 50 Source: Water System Plan 51 Source: DOH, Council Discretion , Water System Plan December 2012 5-24 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 5/Ch05.docx  Public Works /Utility Systems/ Water Utility Engineering for the planning, management, design, and construction of the City water system and the development and updates of policies and design standards.  Public Works Maintenance Services/ Water Maintenance for the operation and maintenance of the City water system.  Community and Economic Development/Plan Review and Permitting for the review, permitting, and inspection of developers’ extensions of City water system.  Finance & Information Technology/Fiscal Services for financial and utility billing services, cost accounting, and fund activity reporting. 5.3.8.2 Project Review Procedures The City submits projects for new sources, water treatment facilities, booster pump stations, reservoirs, and the recoating of the interior of existing reservoirs to DOH for review and approval as per WAC 246-290-110, -120 and -130. City staff reviews and approves projects for water main replacements and water main extensions including related fittings, blocking valves, air and vacuum valves, pressure regulating and relief valves, fire hydrants, service connections and meters, and cross connection control devices. City staff reviews and approves projects for the maintenance and repair of water treatment facilities, booster pump stations, and reservoirs (except for the recoating of the interior of reservoirs). City staff reviews and approves projects for the installation, maintenance, and repair of control, telemetry, and SCADA systems of the drinking water system. The Water Utility Engineering Supervisor reviews project plans for compliance with DOH and City design and construction standards including compatibility with the objectives of the Water System Plan. The Water Utility Engineering Supervisor consults with the Fire Marshall’s staff and the water maintenance supervisor as part of the review. The review addresses separation from sanitary sewers, other non-potable conveyance systems, and sources of contamination; service pressures; fire flow volumes, velocities, and pressures; cross connection control; thrust block and anchoring requirements; corrosion control and protection; air and vacuum control; meter and service line sizes; PRV requirements; operations and maintenance considerations (blocking valves, blow-offs, etc.); construction considerations (cleaning with polypigging, pressure testing, chlorination, flushing, and bacterial testing); etc. Some reviews include hydraulic modeling by the Water Utility staff. The City requires that the plans include applicable standard details and that the plan notes repeat key provisions of the City specifications for the construction and testing of water distribution system mains and appurtenances. Plans must be signed and stamped by a Washington State licensed professional engineer. The Water Utility Engineering Supervisor December 2012 5-25 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 5/Ch05.docx indicates his approval of the plans by signing and dating the construction drawing originals within a City approval block52. 5.3.8.3 Requirements for Outside Parties The policies pertaining to water distribution system facilities and financing are listed above and are applicable to both City CIP projects and private developer projects. Normally during the planning phase of a developer project a pre-application conference is held with the developer’s engineer. Members of the Water Utility engineering staff, Fire Marshall’s staff, and Development Services staff participate in the meeting. Based upon the preliminary information about the proposed project the City staff reviews with the developer’s engineer anticipated requirements for the project: main sizes and main extents, fire flow, looping, pressure control and pressure issues, construction practices, etc. The City’s design standards and policies regarding water main extensions by developers and related requirements are described in Appendix J of this Plan53. 52 Source: DOH, Water System Plan 53 Source: DOH, Water System Plan December 2012 6-1 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 6/Ch06.docx Chapter 6 WATER SUPPLY, WATER RIGHTS, AND WATER QUALITY This chapter describes the City’s sources of supply, including the condition and capacity of its sources; the water rights associated with its sources; and the water quality requirements for its sources. This chapter also discusses the City’s interties as they are related to its source of supply and provides a summary of Renton’s Wellhead Protection Program. The City has pursued and developed its own independent water supply sources to meet its needs and has also been a wholesale customer of Seattle Public Utilities (SPU). In the coming years, as the limits of its water rights are encountered, Renton plans to purchase more water from SPU to meet its needs. Renton will maintain its capability to supply a growing population and control water rates by: 1. Placing additional emphasis on water conservation via customer education, incentive programs, and rates that encourage conservation. 2. Protecting the water quality of the existing wellfields from adverse development impacts in the recharge area. 3. Continuing “beneficial use” of its well supply and protecting the legal integrity of the existing water rights. 4. Negotiating with adjacent utilities for emergency supply. 5. Participating in regional water supply organizations. 6. Considering raw water treatment as required. 7. Renewing its wholesale water supply contract with SPU. Water quality policies and programs to protect existing groundwater supply sources are among the City’s highest priorities. 6.1 WATER SUPPLY RESOURCES Renton's supply is derived from five water sources: the Cedar Valley Aquifer, Springbrook Springs, the Maplewood Aquifer, the recharge area for Well 5A, and SPU supply interties. Each of these is described below and is shown on the water system map included in Appendix F, System Maps. The SPU source of supply is described under Interties. For the City's primary supply, it maintains and operates six wells within the Cedar Valley Aquifer and three wells within the Maplewood Aquifer. It also has Springbrook Springs, a single artesian spring, and Well 5A, which is the only well that the City operates within that particular recharge area. December 2012 6-2 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 6/Ch06.docx 6.1.1 Cedar Valley Aquifer The primary source of the Renton municipal water supply is the Cedar Valley Aquifer, designated a sole source in 1988 by the EPA. The aquifer boundaries correspond to the aerial extent of the post-Vashon alluvium of the lower Cedar River Valley. This shallow aquifer is physically susceptible to contamination since there is no confining layer between the land surface and the water table to retard the downward migration of hazardous chemical spills or other releases of contaminants. In downtown Renton it is especially vulnerable to degradation due to the presence of numerous potential sources of contamination within the capture zone of the wellfield. In the vicinity of the wellfield constructed in downtown Renton, the aquifer consists of coarse-grained sediments deposited at the mouth of the prehistoric Cedar River during the last glacial period. The water table is approximately 23 feet from the surface and the aquifer has an average thickness of 70 feet in the vicinity of the wellfield. Soils overlying the aquifer are silt, sand, and gravel while the aquifer itself is comprised of coarser, very permeable sandy gravel. Aquifer transmissivity is estimated to range from about 1 to 2.3 million gallons per day per foot (mg/day/ft). The transmissivity of the wells RW-1, RW-2 and RW-3 is 1.00 mg/day/ft; PW-8 is 1.30 mg/day/ft; PW-9 is 2.30 mg/day/ft. Specific yield of the wells RW-1, RW-2 and RW-3 is 0.025 cu ft/cu ft; PW-8 is 0.030 cu ft/cu ft; PW-9 is 0.020 cu ft/cu ft (Analysis Report for the City of Renton Cedar River Valley Aquifer Test, RH2 Engineering, 1987). The hydraulic conductivity is on the order of 2,500 ft/day assuming an average transmissivity for all the Cedar Valley Aquifer wells of 1.3 mg/day/ft. Recharge is local, both from direct precipitation and subflow. The DOH contamination susceptibility rating of wells located in the Cedar Valley Aquifer is moderate to high. 6.1.1.1 Downtown Wells The City operates six production wells in the Cedar Valley Aquifer. Wells RW-1, RW-2, and RW-3 each have a pumping capacity of 2,200 gpm and are screened at depths ranging from 50 to 105 feet. Well EW-3 may be used in an emergency. Its capacity is 1,600 gpm and it is screened from 40 to 70 feet below the ground surface. Wells PW-8 and PW-9 have pumping capacities of 3,500 and 1,200 gpm, respectively. The wells are screened at depths ranging from 50 to 105 feet. 6.1.2 Springbrook Springs Approximately 17 percent of City’s current water supply comes from Springbrook Springs, located at the extreme southern city limits. A water-bearing sand and gravel layer enclosed in a thick sequence of glacial till intercepts the surface of the hillside at Springbrook Springs. Two infiltration galleries collect and channel approximately 1,000 gpm into the transmission pipeline. Flow measured at Springbrook treatment building varies over the December 2012 6-3 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 6/Ch06.docx year with the flow into the system being the highest in the summer months. The flow is kept to below the water right Qi flow of 1,050 gpm via a throttling valve. The Springs have not been extensively studied. The recharge area has been estimated by combining the surface area draining to the Springs with the estimated groundwater recharge area. The latter is based on well driller reports for wells in the vicinity of the Springs. The DOH contamination susceptibility rating of the Springs is “moderate to high.” 6.1.3 Maplewood Production Aquifer The Maplewood production aquifer is located east of the downtown area under the Maplewood Golf Course. It serves as a redundant source of supply for the vulnerable Cedar Valley Aquifer. This aquifer is believed to extend northward into hydrostratigraphically correlated zones beneath the North Uplands. It ranges from 70 to 120 feet thick and is encountered from approximately 135 to 345 feet below the golf course. The Maplewood Aquifer is confined with evidence of some leakage. Gradients are predominantly upward. Estimated transmissivities range from 49,000 to 76,000 gpd per foot with corresponding hydraulic conductivity ranging from 94 to 128 feet per day. Recharge is believed to occur predominantly from the North Uplands while discharge occurs in the Cedar Valley via upward flow to the alluvial aquifer east of the bedrock narrows. Other recharge and discharge points may exist. The DOH contamination susceptibility rating of the Maplewood Aquifer is low. 6.1.3.1 Maplewood Wells The City has three Maplewood wells (PW-11, PW-12, and PW-17), which have pumping capacities of 2,500 gpm, 1,600 gpm, and 1,500 gpm, respectively. These wells are screened at depths ranging from 284 to 344 feet. The City has a permit for a water right at this location for Well 10. The City has no current plan to develop this well. 6.1.4 Well 5A Well 5A is located near the northern city limits east of Lake Washington. This well has a pumping capacity of 1,500 gpm and is completed in a sand and gravel aquifer zone approximately 280 to 390 feet below ground (about -42 to -152 feet mean sea level). The aquifer zone is overlain by stratified glacial deposits of fine to coarse sand and gravel layered with silt and clay. The recharge area for Well 5A is not known but there are some indications that the well may be withdrawing from the Maplewood production aquifer, which is believed to extend northeasterly from the Maplewood area. The DOH contamination susceptibility rating of Well 5A is low. December 2012 6-4 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 6/Ch06.docx 6.2 CONDITION OF SUPPLY SOURCES The City has capital improvement and maintenance programs to upgrade and to maintain its sources in good condition and to comply with water quality criteria. During the last 21 years, the City has upgraded the treatment systems at its Springbrook Springs and all downtown wells. This includes modernization of the disinfection systems and the addition of sodium hydroxide for pH adjustment to reduce the corrosivity of the water. Water treatment improvements to remove hydrogen sulfide, manganese, and ammonia from the Maplewood wells (PW-11, PW-12, and PW-17) were completed in 2006. The Maplewood treatment system is able to deliver up to 3,000 gpm to the distribution system. The plant has provisions to allow additional filters in the future to increase the capacity to 5,500 gpm. There is no plan to provide additional treatment for Well 5A within the next six years. Adding this treatment will be examined again during the next Water System Plan update. Included in this six-year plan are projects to provide Wells EW-3, PW-8 and PW-9, and Springbrook Springs with primary disinfection (log 4 virus removal). The planned method will be by providing additional chlorine contact time to achieve the required combination of chlorine concentration and contact time for primary disinfection. 6.3 CAPACITY OF SUPPLY SOURCES In general, the City’s sources are equipped with pumping capacity to deliver the certificated City water rights (or in the case of the Maplewood wells – the permitted Qi flows) to the distribution system. The installed pumping equipment has the capacity to deliver the water equal to the peak day requirements of the Renton system through 2025. However, without obtaining water rights certificates for the three Maplewood wellfield wells, not all of this installed capacity can be utilized. For the current planning period the City plans to use the Maplewood wells as alternate sources only and to revisit perfecting water right certificates during the next planning period. The combined instantaneous withdrawal from the Cedar River sources and the Maplewood sources will not exceed the certificated Qi water rights of the Cedar River sources. The same is true with regard to annual (Qa) withdrawals. At present, Well 5A is only used for back-up supply because of the water quality issues mentioned in Chapter 2 of this plan. Well 4 has been inactive since 1962. Although the City is currently not utilizing the water right associated with this well, the City could drill a new well in the future if needed. This would provide an additional 170 gpm. During the current planning period the City anticipates that on infrequent occasions the demand will exceed the Qi water rights of the Cedar River sources and Springbrook December 2012 6-5 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 6/Ch06.docx Springs. During these periods the City plans to meet the demand by purchasing wholesale water from Seattle Public Utilities. See the discussion of this source below. 6.4 WATER RIGHTS The State Water Code, as outlined in Title 90 of the RCW, states that all surface and ground waters of the state are the property of the public. It is, therefore, the policy of the state to promote the use of the public waters in a fashion that provides the maximum benefit arising from both diversionary uses of the state's public water and the retention of waters within the streams and lakes in sufficient quantity and quality to protect in-stream and natural values and rights. (90.03.005 RCW): The state takes responsibility for determining who, among the various competing basin stakeholders, is allowed to use, divert, or consume the water. When an application to obtain water rights is submitted to the DOE, the date of receipt of this application establishes the priority of the water right. Prior to the development of a source of supply, a temporary permit is issued by DOE to construct, develop, and test the supply source. A water right may then be issued following a thorough review process, a determination of the amount of supply that is put to beneficial use, and the impacts on the various other basin stakeholders. This water right establishes the priority use of the water, and becomes an appurtenance to the property. Renton has developed independent water sources in order to maintain greater control over the management and costs of its water supply. Through the development of independent sources of supply the City strives to protect the public health, ensure adequate water supply to meet the requirements of its customers, and support the economic prosperity of the City. Consistent with DOE's procedures for issuing water rights, all of the City’s water rights specify a Qi and a maximum Qa. In issuing recent water rights certificates to the City, DOE has conditioned the permits with a limitation on the total withdrawals by the City of 14,809 acre feet per year, recognizing the City’s water rights may have an impact on the flows in the Cedar River. The Cedar River is an important regional resource, being the major source of supply for the SPU regional water system and a number of other uses; in-stream flows are important to anadromous fish and the management of water levels in Lake Washington. Copies of the City's water rights certificates and permits are in Appendix E. 6.4.1 Existing Water Rights The City has 13 water right certificates and five permits. A summary of the City’s existing water rights for municipal supply is presented in Tables 6.1a and 6.1b, respectively. The total instantaneous flow rate from the certificated rights is 15,152 gpm. Certificated additive (primary) annual water rights are 14,809.5 acre-feet per year. Certificated non-additive (supplementary) annual water rights are 7,539 acre-feet per year. De c e m b e r 2 0 1 2 6-6 pw : / / C a r o l l o / D o c u m e n t s / C l i e n t / W A / R e n t on / 8 5 9 5 A 0 0 / D e l i v e r a b l e s / C ha p t e r 6 / C h 0 6 . d o c x Ta b l e 6 . 1 a E x i s t i n g W a t e r R i g h t s S t a t u s Pe r m i t C e r t i f i c a t e o r Cl a i m N o . Na m e o f Ri g h t h o l d e r o r Cl a i m a n t Pr i o r i t y D a t e S o u r c e N a m e / N o . Pr i m a r y o r Su p p l e m e n t a r y Ex i s t i n g W a t e r R i g h t s E x i s t i n g S y s t e m - w i d e D e m a n d ( 2 0 1 1 ) Current Water Right Status (Excess/Deficiency) Qi Q a A Q a NA Ma x i m u m In s t a n t a n e o u s F l o w Ra t e ( Q i ) g p m (T a b l e W A p p e n d i x I – P H D ) Annual Volume (Qa) ac-ft/yr (Table W Appendix I – ADD) Maximum Instantaneous Flow Rate (Qi) gpm Annual Volume (Qa) ac-ft/yr G1 - 2 0 6 0 5 C C i t y o f R e n t o n M a y 3 , 1 9 7 3 In f i l t r a t i o n G a l l e r y (S p r i n g b r o o k Sp r i n g s ) Pr i m a r y 1 , 0 5 0 1 , 6 8 0 GW C 8 8 6 - D C i t y o f R e n t o n J a n 1 , 1 9 4 4 R W - 1 P r i m a r y 1 , 0 4 0 1 , 6 7 6 GW C 5 8 3 8 - A C i t y o f R e n t o n A p r 1 4 , 1 9 6 6 R W - 1 S u p p l e m e n t a r y 9 6 0 1 , 5 3 6 GW C 8 8 7 - D C i t y o f R e n t o n J a n 1 , 1 9 4 4 R W - 2 P r i m a r y 1 , 0 4 0 8 3 8 GW C 5 8 3 5 - A C i t y o f R e n t o n A p r 1 4 , 1 9 6 6 R W - 3 S u p p l e m e n t a r y 1 , 6 0 0 2 , 5 6 0 GW C 5 8 3 6 - A C i t y o f R e n t o n A p r 1 4 , 1 9 6 6 R W - 1 , 2 , 3 S u p p l e m e n t a r y 1 , 9 6 0 3 , 1 3 6 GW C 6 7 7 5 - A C i t y o f R e n t o n A p r 1 , 1 9 6 8 P W - 8 P r i m a r y 3 , 0 0 0 4 , 5 3 2 3 0 7 GW C 6 7 7 6 - A C i t y o f R e n t o n J a n 2 1 , 1 9 6 9 P W - 8 P r i m a r y 5 0 0 8 0 0 G1 - 2 4 1 9 1 C C i t y o f R e n t o n O c t 1 8 , 1 9 8 2 P W - 9 P r i m a r y 1 , 3 0 0 1 , 0 4 0 GW C 3 5 9 1 - A C i t y o f R e n t o n F e b 1 8 , 1 9 5 3 P W - 5 A P r i m a r y 1 , 3 0 0 2 , 0 0 0 GW C 5 8 3 4 - A C i t y o f R e n t o n A p r 1 4 , 1 9 6 6 P W - 5 A P r i m a r y 2 0 0 3 2 0 SW C 4 6 3 C i t y o f R e n t o n M a y 1 7 , 1 9 3 0 S p r i n g b r o o k C r e e k P r i m a r y 1 , 0 3 2 1 , 6 5 0 GW C 8 8 4 - D C i t y o f R e n t o n N o v 1 , 1 9 4 2 W e l l 4 P r i m a r y 1 7 0 2 7 3 . 5 G1 - 2 4 7 8 1 - P C i t y o f R e n t o n J a n 2 , 1 9 8 6 P W - 1 1 S u p p l e m e n t a r y 1 , 6 0 0 1 , 7 9 2 G1 - 2 5 3 9 6 - P C i t y o f R e n t o n F e b 1 3 , 1 9 8 9 P W - 1 1 S u p p l e m e n t a r y 9 0 0 1 , 0 0 8 G1 - 2 4 7 8 2 - P C i t y o f R e n t o n J a n 2 , 1 9 8 6 P W - 1 2 S u p p l e m e n t a r y 1 , 6 0 0 1 , 7 9 2 G1 - 2 5 3 9 7 - P C i t y o f R e n t o n F e b 2 3 , 1 9 8 9 P W - 1 7 S u p p l e m e n t a r y 1 , 5 0 0 1 , 6 8 0 To t a l 2 0 , 7 5 2 1 4 , 8 0 9 . 5 1 3 , 8 1 1 1 5 , 2 4 3 9 , 1 2 9 5 , 5 0 9 5 , 6 8 0 To t a l C e r t i f i c a t e d 15 , 1 5 2 1 4 , 8 0 9 . 5 7 , 5 3 9 1 5 , 2 4 3 9 , 1 2 9 ( 9 1 ) 5 , 6 8 0 Ce r t i f i c a t e d C u r r e n t l y O n l i n e 1 2 , 4 5 0 1 0 , 5 6 6 7 , 5 3 9 1 5 , 2 4 3 9 , 1 2 9 (2,793) (demand met from storage) 1,437 excess De c e m b e r 2 0 1 2 6-7 pw : / / C a r o l l o / D o c u m e n t s / C l i e n t / W A / R e n t on / 8 5 9 5 A 0 0 / D e l i v e r a b l e s / C ha p t e r 6 / C h 0 6 . d o c x Ta b l e 6 . 1 b E x i s t i n g W a t e r R i g h t s S t a t u s - I n t e r t i e s In t e r t i e N a m e / I d e n t i f i e r Na m e o f P u r v e y o r Pr o v i d i n g W a t e r Ex i s t i n g P h y s i c a l L i m i t s o n I n t e r t i e W a t e r U s e E x i s t i n g ( 2 0 1 1 ) C o n s u m p t i o n T h r o u g h I n t e r t i e Current Intertie Supply Status (Excess / Deficiency) Ma x i m u m In s t a n t a n e o u s F l o w Ra t e ( Q i ) g p m Ma x i m u m A n n u a l Vo l u m e ( Q a ) a c - f t / y r Ma x i m u m In s t a n t a n e o u s F l o w Ra t e ( Q i ) g p m Maximum Annual Volume (Qa) ac-ft/yr Maximum Instantaneous Flow Rate (Qi) gpm Maximum Annual Volume (Qa) ac-ft/yr Ti f f a n y P a r k S P U S t a # 3 9 C i t y o f S e a t t l e 1 , 0 5 0 2 1 , 6 9 4 N o t U s e d 0 1 , 0 5 0 1 , 6 9 4 Fr e d N e l s o n S P U S t a # 3 4 C i t y o f S e a t t l e 9 2 5 2 1 , 4 9 2 N o t U s e d 0 9 2 5 1 , 4 9 2 Lo n g a c r e s / B o w L a k e S P U S t a # 1 9 6 C i t y o f S e a t t l e 2, 8 0 0 3 4, 5 1 6 N o t U s e d 0 2 , 8 0 0 4 , 5 1 2 PR V 2 8 S P U S t a # 3 3 C i t y o f S e a t t l e 7 0 0 4 1 , 1 2 9 N o t U s e d 0 7 0 0 1 , 1 2 9 PR V 3 5 S P U S t a # 3 8 1 C i t y o f S e a t t l e 7 0 0 4 1 , 1 2 9 N o t M e a s u r e d 1 1 8 3 0 0 1 , 0 1 1 PR V 6 S P U S t a # 3 7 C i t y o f S e a t t l e 3 2 0 4 5 1 6 N o t U s e d 0 3 2 0 5 1 6 SP U S t a # 3 6 C i t y o f S e a t t l e 7 0 0 4 1 , 1 2 9 N o t U s e d 0 7 0 0 1 , 1 2 9 Bo e i n g P l a n t F e e d – E a s t S P U S t a # 1 7 9 C i t y o f S e a t t l e 1 , 9 5 0 5 3 , 1 4 5 N o t M e a s u r e d 3 2 9 0 0 3 , 1 1 3 Bo e i n g P l a n t F e e d – W e s t S P U S t a # 1 8 0 C i t y o f S e a t t l e 1 , 9 5 0 5 3 , 1 4 5 N o t M e a s u r e d 3 2 9 0 0 3 , 1 1 3 PR V 2 3 T u k w i l a C i t y o f T u k w i l a 1 , 2 5 0 4 2 , 0 1 6 N o t U s e d 0 1 , 2 5 0 2 , 0 1 6 PR V 2 5 K e n t C i t y o f K e n t 1 , 9 5 0 4 3 , 1 4 5 N o t U s e d 0 1 , 9 5 0 3 , 1 4 5 Di m m i t t B P S S k y w a y W a t e r & S e w e r D i s t r i c t Sk y w a y W a t e r & Se w e r D i s t r i c t 1, 6 0 0 2 4 , 5 1 6 N o t U s e d 0 1 , 6 0 0 2 , 5 8 1 To t a l 15 , 8 9 5 2 5 , 6 3 7 - 1 8 2 15,695 29,160 No t e s : 1. P R V 3 5 ( S P U S t a # 3 8 ) w a s u s e d t o s u p p l y w a t e r t o t h e W e s t H il l o p e r a t i o n a l a r e a w h i l e t h e W e s t H i l l r e s e r v o i r w a s d o w n f o r m ai n t e n a n c e . 2. B a s e d u p o n r a t e d p u m p c a p a c i t y a n d p u m p s t a t i o n h y d r a u l i c s . 3. B a s e d u p o n f i e l d t e s t i n g . 4. B a s e d u p o n e n g i n e e r i n g j u d g m e n t t a k i n g i n t o c o n s i d e r a t i o n P R V d e s ig n c u r v e s , a n a r b i t r a r y 8 f e e t p e r s e c o n d v e l o c i t y l i m i t i n p i p e s a n d o t h e r f a c t o r s . 5. B a s e d u p o n e n g i n e e r i n g j u d g m e n t t a k i n g i n t o c o n s i d e r a t i o n m e t e r d e s i g n c u r v e s , a n a r b i t r a r y 8 f e e t p e r s e c o n d v e l o c i t y l i m i t i n p i p e s a n d o t h e r f a c t o r s . December 2012 6-8 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 6/Ch06.docx All of the City’s certificated water rights are currently being used to provide supply with the exception of the Well 5A, Well 4 and the Springbrook Creek surface water right. Well 4 is inactive and therefore the City is not using the water right associated with this well. Well 5A is currently not being used due to water quality issues. The water right for Well EW-3 was transferred to the new wells RW-3, RW-1, and RW-2. However, in accordance with the water right certificate, EW-3 continues to be maintained should it be needed to intercept contaminants that could affect the other wells. EW-3 can also be used as an emergency supply after notifying DOE, in the event that the City’s other sources fail. In 2005 the City staff met with the staff of the Northwest Regional Office of the Department of Ecology (DOE) to discuss finalizing the wellfield management plan (operating plan) for the Maplewood wellfield. At that time the City was informed by DOE that the method for monitoring in-stream flows in the Cedar River that was prescribed in the Reports of Examination for the permits for wells PW-11, PW-12 and PW-17 and which the City had been following was not capable of measuring the impact of the well pumping on the in-stream flows. As a result, the City requested and was granted an extension on the permits for the wells. For this six-year planning period no additional water rights for these wells will be actively pursued. The wells will be used as alternatives to the Cedar River wells (RW-1, RW-2, RW-3, PW-8, and PW-9); combined withdrawals (Qi and / or Qa) will not exceed existing water rights for the Cedar River wells. 6.4.2 Forecasted Water Rights Renton’s forecasted water rights are shown on Tables 6.2a and 6.2b. The City does not anticipate applying for any new water rights or changes to its existing water rights. In 1997, the City applied for a change of place for several of its water rights, but since then it has withdrawn those applications. The City’s forecasted water rights are the same as its existing water rights with the exception of interties. The City estimates that it will begin to exceed its annual water right of 14,809 acre-feet (equivalent to 13.22 mgd ADD) as soon as 2041 or as late as 2081. The annual water rights for Well 5A are 2,320 acre-feet. The annual water right for Well 4 is 273.5 acre-feet, and the annual right for Springbrook Creek is 1,650 acre-feet. If the City does not pursue additional treatment for Well 5A, does not redevelop Well 4, and does not use the Springbrook Creek water right, the available annual water right will be 10,566 acre-feet (equivalent to 9.43 mgd ADD). Under this scenario the City would exceed this usable annual water right as soon as 2018 and as late as 2034 (refer to Chapter 3, Section 3.10, Potential Range in Future Demand Projections). The estimated existing system-wide peak hour demand exceeds the City’s instantaneous water rights by 91 gpm (by 2,793 gpm when compared to existing on-line sources). Currently the difference in supply capacity and peak hour demands is met by the City’s storage. In 2031, the peak hour demands will exceed the instantaneous water rights by approximately 4,790 gpm (by 7,490 gpm when compared to projected available on-line sources). De c e m b e r 2 0 1 2 6-9 pw : / / C a r o l l o / D o c u m e n t s / C l i e n t / W A / R e n t on / 8 5 9 5 A 0 0 / D e l i v e r a b l e s / C ha p t e r 6 / C h 0 6 . d o c x Ta b l e 6 . 2 a F o r e c a s t e d W a t e r R i g h t s S t a t u s Pe r m i t C e r t i f i c a t e or C l a i m N o . Na m e o f Ri g h t h o l d e r o r Cl a i m a n t Pr i o r i t y D a t e S o u r c e N a m e / N o . Pr i m a r y o r Su p p l e m e n t a r y Fo r e c a s t e d W a t e r R i g h t s Fo r e c a s t e d W a t e r U s e F r o m S o u r c e s (2031 Demand) Forecasted Water Right Status (Excess/Deficiency – 2031 Demand) Qi Q a A Q a NA Ma x i m u m I n s t a n t a n e o u s Fl o w R a t e ( Q i ) g p m (T a b l e W A p p e n d i x I – PHD) Annual Volume (Qa) ac-ft/yr (Table W Appendix I – ADD) Maximum Instantaneous Flow Rate (Qi) gpm Annual Volume (Qa) ac-ft/yr G1 - 2 0 6 0 5 C C i t y o f R e n t o n M a y 3 , 1 9 7 3 In f i l t r a t i o n G a l l e r y (S p r i n g b r o o k Sp r i n g s ) Pr i m a r y 1 , 0 5 0 1 , 6 8 0 GW C 8 8 6 - D C i t y o f R e n t o n J a n 1 , 1 9 44 R W - 1 P r i m a r y 1 , 0 4 0 1 , 6 7 6 GW C 5 8 3 8 - A C i t y o f R e n t o n A p r 1 4 , 1 9 6 6 RW - 1 S u p p l e m e n t a r y 9 6 0 1 , 5 3 6 GW C 8 8 7 - D C i t y o f R e n t o n J a n 1 , 1 9 44 R W - 2 P r i m a r y 1 , 0 4 0 8 3 8 GW C 5 8 3 5 - A C i t y o f R e n t o n A p r 1 4 , 1 9 6 6 RW - 3 S u p p l e m e n t a r y 1 , 6 0 0 2 , 5 6 0 GW C 5 8 3 6 - A C i t y o f R e n t o n A p r 1 4 , 1 9 6 6 R W - 1 , 2 , 3 S u p p l e m e n t a r y 1 , 9 6 0 3 , 1 3 6 GW C 6 7 7 5 - A C i t y o f R e n t o n A p r 1 , 1 9 6 8 PW - 8 P r i m a r y 3 , 0 0 0 4 , 5 3 2 3 0 7 GW C 6 7 7 6 - A C i t y o f R e n t o n J a n 2 1 , 1 9 6 9 P W - 8 P r i m a r y 5 0 0 8 0 0 G1 - 2 4 1 9 1 C C i t y o f R e n t o n O c t 1 8 , 1 9 8 2 P W - 9 P r i m a r y 1 , 3 0 0 1 , 0 4 0 GW C 3 5 9 1 - A C i t y o f R e n t o n F e b 1 8 , 1 9 5 3 P W - 5 A P r i m a r y 1 , 3 0 0 2 , 0 0 0 GW C 5 8 3 4 - A C i t y o f R e n t o n A p r 1 4 , 1 9 6 6 P W - 5 A P r i m a r y 2 0 0 3 2 0 SW C 4 6 3 C i t y o f R e n t o n M a y 1 7 , 1 9 3 0 S p r i n g b r o o k C r e e k P r i m a r y 1 , 0 3 2 1 , 6 5 0 GW C 8 8 4 - D C i t y o f R e n t o n N o v 1 , 19 4 2 W e l l 4 P r i m a r y 1 7 0 2 7 3 . 5 G1 - 2 4 7 8 1 - P C i t y o f R e n t o n J a n 2 , 1 9 8 6 P W - 1 1 S u p p l e m e n t a r y 1 , 6 0 0 1 , 7 9 2 G1 - 2 5 3 9 6 - P C i t y o f R e n t o n F e b 2 3 , 1 9 8 9 P W - 1 1 S u p p l e m e n t a r y 9 0 0 1 , 0 0 8 G1 - 2 4 7 8 2 - P C i t y o f R e n t o n J a n 2 , 1 9 8 6 P W - 1 2 S u p p l e m e n t a r y 1 , 6 0 0 1 , 7 9 2 G1 - 2 5 3 9 7 - P C i t y o f R e n t o n F e b 2 3 , 1 9 8 9 P W - 1 7 S u p p l e m e n t a r y 1 , 5 0 0 1 , 6 8 0 To t a l 20 , 7 5 2 1 4 , 8 0 9 . 5 1 3 , 8 1 1 1 9 , 9 4 4 1 1 , 8 5 1 808 2,958 To t a l C e r t i f i c a t e d 15 , 1 5 2 1 4 , 8 0 9 . 5 7 , 5 3 9 1 9 , 9 4 4 1 1 , 8 5 1 ( 4 , 7 9 2 ) 2 , 9 5 8 Fo r e c a s t e d C e r t i f i c a t e d O n - L i n e 12 , 4 5 0 1 0 , 5 6 6 7 , 5 3 9 1 9 , 9 4 4 1 1 , 8 5 1 (7,494) (demand met from storage and SPU interties) (1,285) (demand met from SPU interties) De c e m b e r 2 0 1 2 6-10 pw : / / C a r o l l o / D o c u m e n t s / C l i e n t / W A / R e n t on / 8 5 9 5 A 0 0 / D e l i v e r a b l e s / C ha p t e r 6 / C h 0 6 . d o c x Ta b l e 6 . 2 b F o r e c a s t e d I n t e r t i e S t a t u s In t e r t i e N a m e / I d e n t i f i e r Na m e o f P u r v e y o r P r o v i d i n g Wa t e r Ex i s t i n g P h y s i c a l L i m i t s o n I n t e r t i e W a t e r U s e Fo r e c a s t C o n s u m p t i o n T h r o u g h I n t e r t i e s (2 0 3 1 D e m a n d ) Forecast Intertie Supply Status (Excess / Deficiency) Ma x i m u m I n s t a n t a n e o u s Fl o w R a t e ( Q i ) g p m Ma x i m u m A n n u a l Vo l u m e ( Q a ) a c - f t / y r Ma x i m u m I n s t a n t a n e o u s Fl o w R a t e 5 ( Q i ) g p m Annual Volume (Qa) ac-ft/yr Maximum Instantaneous Flow Rate (Qi) gpm Annual Volume (Qa) ac-ft/yr Ti f f a n y P a r k S P U S t a # 3 9 C i t y o f S e a t t l e 1 , 0 5 0 1 1 , 6 9 4 0 0 1 , 0 5 0 1 , 6 9 4 Fr e d N e l s o n S P U S t a # 3 4 C i t y o f S e a t t l e 9 2 5 1 1 , 4 9 2 0 0 9 2 5 1 , 4 9 2 Lo n g a c r e s / B o w L a k e S P U S t a # 1 9 6 C i t y o f S e a t t l e 2 , 8 0 0 2 4 , 5 1 6 2 , 8 0 0 3 7 0 0 4 , 1 4 6 PR V 2 8 S P U S t a # 3 3 C i t y o f S e a t t l e 7 0 0 3 1 , 1 2 9 0 0 7 0 0 1 , 1 2 9 PR V 3 5 S P U S t a # 3 8 C i t y o f S e a t t l e 7 0 0 3 1 , 1 2 9 0 0 7 0 0 1 , 1 2 9 PR V 6 S P U S t a # 3 7 C i t y o f S e a t t l e 3 2 0 3 5 1 6 0 0 3 2 0 5 1 6 SP U S t a # 3 6 C i t y o f S e a t t l e 7 0 0 3 1 , 1 2 9 0 0 7 0 0 1 , 1 2 9 Bo e i n g P l a n t F e e d – E a s t S P U S t a # 1 7 9 (v i a a n a d d i t i o n o f a m e t e r e d b r a n c h up s t r e a m o f B o e i n g m e t e r ) Ci t y o f S e a t t l e 1 , 9 5 0 4 3 , 1 4 5 1 , 0 5 0 6 0 9 0 0 3 , 0 8 5 Bo e i n g P l a n t F e e d – W e s S P U S t a # 1 8 0 ( v i a a n a d d i t i o n o f a m e t e r e d b r a n c h up s t r e a m o f B o e i n g m e t e r ) Ci t y o f S e a t t l e 1 , 9 5 0 4 3 , 1 4 5 1 , 0 5 0 6 0 9 0 0 3 , 0 8 5 PR V 2 3 T u k w i l a C i t y o f T u k w i l a 1 , 2 5 0 3 2 , 0 1 6 0 0 2 , 4 0 0 3 , 8 7 1 PR V 2 5 K e n t C i t y o f K e n t 1 , 9 5 0 3 3 , 1 4 5 0 0 1 , 9 0 0 3 , 0 6 4 Di m m i t t B o o s t e r P u m p S t a t i o n Sk y w a y W a t e r & S e w e r D i s t r i c t Sk y w a y W a t e r & S e w e r D i s t r i c t 1 , 6 0 0 1 2 , 5 8 1 0 0 2 , 8 0 0 4 , 5 1 6 To t a l 1 5 , 8 9 5 2 5 , 6 3 7 4 , 9 0 0 490 13,295 28,856 No t e s : 1. B a s e d u p o n r a t e d p u m p c a p a c i t y a n d p u m p s t a t i o n h y d r a u l i c s . 2. B a s e d u p o n f i e l d t e s t i n g . 3. B a s e d u p o n e n g i n e e r i n g j u d g m e n t t a k i n g i n t o c o n s i d e r a t i o n P R V d e s ig n c u r v e s , a n a r b i t r a r y 8 f e e t p e r s e c o n d v e l o c i t y l i m i t i n p i p e s a n d o t h e r f a c t o r s . 4. B a s e d u p o n e n g i n e e r i n g j u d g m e n t t a k i n g i n t o c o n s i d e r a t i o n m e t e r d e s i g n c u r v e s , a n a r b i t r a r y 8 f e e t p e r s e c o n d v e l o c i t y l i m i t i n p i p e s a n d o t h e r f a c t o r s . 5. E s t i m a t e d b y a s s u m i n g t h e a m o u n t s o f f l o w f r o m e q u a l i z i n g s t or a g e a n d f r o m i n t e r t i e s n e e d e d t o m e e t t h e p r o j e c t e d d e f i c i t f l ow i n T a b l e 6 . 2 a ( a m o u n t f r o m i n t e r t i e s = t o t a l d e f i c i t flow minus flow from equalizing storage). Distributed ca l c u l a t e d i n t e r t i e f l o w t o t h r e e i n t e r t i e s f e e d i n g t h e 1 9 6 P r e s s u r e Z o n e . December 2012 6-11 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 6/Ch06.docx The City plans to address the forecast difference between Qa water rights and annual demand by purchasing water from Seattle Public Utilities. To address the forecast difference between Qi water rights and demand, the City plans to construct additional storage and purchase water from SPU. Additionally, the City will further evaluate the timing of capital improvements to address the water quality problems of Well 5A. In April 2011, the City renewed its wholesale water contract with SPU for another 50 years. Via the new contract, the City will be a full participant in the regional water conservation program led and managed by SPU. The City’s customers will have full access to all the water conservation programs, including rebate programs, the regional program has to offer. The City anticipates a significant decrease in consumption as a result. Additionally, the contract provides for the sale of water to Renton. Renton plans to meet its water demand needs that cannot be met by way of its own sources of supply and/or via storage by purchasing water from SPU. Currently, the City has ten metered connections to SPU transmission mains. See Chapter 2, Table 2.3 for specific information. Please refer to Chapter 7 - System Analysis and Chapter 9 - Capital Improvement Program, for further discussion of projected system deficiencies in the context of source of supply and water rights. 6.5 INTERTIES The City’s interties are described in Chapter 2 as part of the description of existing facilities. The following is a summary of recent upgrades made to some of the interties with SPU: in 2010 a flow control valve and the related SCADA interfaces were added to the Longacres / Bow Lake Pipeline connection (PRV Station 24), and in 2011 flow meters and the related SCADA interfaces were added at the Tiffany Park Booster Pump Station (connection to SPU Cedar River Pipeline No 1) and at the Fred Nelson Booster Pump Station (connection to the SPU Bow Lake Pipeline – a.k.a. Cedar River Pipeline No. 4). The City and Seattle Public Utilities signed a wholesale supply contract in May 2011. The contract provides for SPU to supply water to the City of Renton. The contract period is 2012 through 2062. The City plans to use this supply to meet demand above its existing water rights in combination with additional equalizing storage. 6.6 WATER QUALITY PLAN AND TREATMENT The City performs regular water quality monitoring of its system as described in Chapter 8 - Operations and Maintenance, and as required by WAC 246-290-300. The City’s water quality at its supply sources, storage facilities, and within its distribution system satisfactorily meets state and federal requirements on a regular basis. December 2012 6-12 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 6/Ch06.docx The City maintains water quality within its system through the following approaches: 1. Routine system flushing within its distribution system in order to maintain satisfactory water quality. 2. A main replacement program to eliminate dead end mains and replace cast iron, asbestos cement, and old steel pipes. 3. Installation of pH meters at all well sites in order to better manage pH and as a result reduce corrosion within the system. It is recommended that the City take the following actions as part of its water quality planning programs:  The City should continue to track proposed new water quality laws, such as revisions to the Total Coliform Rule and Lead & Copper Rule, and other rules and regulations being considered by the EPA and DOH (e.g., contaminates being examined UCMR 3) in order to plan for any impacts on its water system and its operation to ensure planning is in place to comply with the potential impacts of these regulations. At this time it is not possible to determine the impact of several proposed rules.  The City should continue to implement its corrosion control treatment improvements as necessary to reduce levels of corrosion within the distribution system and private plumbing. 6.6.1 Existing Water Quality A review of the City's water quality testing records indicates that overall water quality is excellent with only minor problems related to aesthetic problems caused by iron, manganese, and hydrogen sulfide. These are secondary contaminants that do not affect public health. Consequently, treatment is necessary only to minimize nuisance and aesthetic related problems such as odor and discoloration. All testing for bacteria (total coliforms) has been less (1.3%) than the MCL (5%) during the past six years. However, the City’s water is corrosive, and therefore is treated to prevent corrosion-related water quality problems. 6.6.2 Treatment Gaseous chlorine or sodium hypochlorite (Maplewood wells) is added to all of the City's sources for disinfection and sodium fluoride is also added to prevent dental caries / cavities. Sodium hydroxide is added at Wells RW-1, RW-2, RW-3, PW-8, PW-9, and EW-3, as well as at Springbrook Springs, to raise the pH of the water delivered to the distribution system for pH control. The Maplewood treatment facility treats water from wells PW-11, PW-12, and PW-17. December 2012 6-13 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 6/Ch06.docx The Maplewood Treatment Plant performs the following functions:  Removes hydrogen sulfide by converting it to sulfate by adding oxygen (granular activated carbon is used as a catalyst).  Removes manganese using green sand filters.  Converts ammonia in the water to nitrogen gas by reacting it with sodium hypochlorite in a contact basin. A sequestering agent (Aqua Mag) is used in Well 5A to treat for iron and manganese. Since there is also naturally occurring ammonia in the water at Well 5A, the chlorine dosage is set to create monochloramines for disinfection. From an aesthetics perspective the existing treatment is marginal (taste, odor and staining problems still exist). Because of this the source is used sparingly. Aqua Mag is also added at the West Hill Booster Pump Station and PRV Station 20 in the Renton Hill area for corrosion control because of the significant number of cast iron distribution pipelines in these areas. Table 6.3 details the current source treatment goals and effectiveness. 6.6.3 Water Quality Monitoring The City has implemented a comprehensive and proactive water quality monitoring program. It includes monitoring for operations, regulatory monitoring to meet the requirements of the federal Safe Drinking Water Act, and monitoring to manage the City's aquifers. Monitoring operations measure chlorine levels and pumping rates for each production well, sample polyphosphate levels, and take pH measurements as part of the corrosion control program. Regulatory monitoring measures bacteria, organic and inorganic chemicals, trihalomethanes, and disinfection byproducts radionuclides, lead and copper in the water. The sampling is performed at locations and with the frequencies required by state and federal regulations. Aquifer monitoring is used to identify any contamination and to track water level of the aquifer in compliance with state and federal drinking water rules. This program is described in detail in Appendix N of this Water System Plan Update. Water quality sampling is the responsibility of the water maintenance supervisor and is carried out on a daily basis by a team of utility technicians. In addition to ensuring that water treatment and maintenance are performed effectively, the water maintenance supervisor is responsible for ensuring that monitoring is carried out and for managing water quality data and records both for routine and special monitoring programs. The Water Maintenance Division maintains a water quality laboratory located at the City shops building at 3555 SE 3rd Avenue. The City's water quality laboratory is equipped to do analysis for turbidity, chlorine residual, fluoride residual, pH, and temperature. December 2012 6-14 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 6/Ch06.docx Ta b l e 6 . 3 S o u r c e T r e a t m e n t Go a l s a n d E f f e c t i v e n e s s Fa c i l i t y S o u r c e s T r e a t e d T r e a t m e n t T y p e T r e a t m e n t G o a l G o a l M e t ? Li b e r t y P a r k C T P i p e 1 W e l l s R W - 1 , R W - 2 a n d R W - 3 Ch l o r i n a t i o n ( g a s ) 4 - l o g i n a c t i v a t i o n ( C T = 6 ) Y e s Li b e r t y P a r k C T P i p e 2 (i n c l u d e d i n C I P ) We l l E W - 3 C h l o r i n a t i o n ( g a s ) 4 - l o g i n a c t i v a t i o n ( C T = 6 ) B y e n d o f 2 0 1 3 Ce d a r R i v e r P a r k C T P i p e (i n c l u d e d i n C I P ) We l l s P W - 8 a n d P W - 9 C h l o r i n a t i o n ( g a s ) 4 - lo g i n a c t i v a t i o n ( C T = 6 ) B y e n d o f 2 0 1 3 Sp r i n g b r o o k S p r i n g s C T P i p e (i n - h o u s e i n s t a l l a t i o n ) Sp r i n g b r o o k S p r i n g s In f i l t r a t i o n G a l l e r i e s Ch l o r i n a t i o n ( g a s ) 4 - l o g i n a c t i v a t i o n ( C T = 6 ) [P e r m a n e n t c o n f i g u r a t i o n ] By end of 2012 We l l H o u s e 1 - 2 - 3 W e l l s R W - 1 , R W - 2 a n d R W - 3 F l u o r i d a t i o n 0 . 8 m g / L Y e s We l l H o u s e 8 W e l l P W - 8 C h l o r i n a t i on ( g a s ) S e c o n d a r y d i s i n f e c t i o n – me a s u r e a b l e r e s i d u a l i n a l l pa r t s o f d i s t r i b u t i o n s y s t e m Yes We l l H o u s e 9 W e l l P W - 9 C h l o r i n a t i on ( g a s ) S e c o n d a r y d i s i n f e c t i o n – me a s u r e a b l e r e s i d u a l i n a l l pa r t s o f d i s t r i b u t i o n s y s t e m Yes Fl u o r i d a t i o n F a c i l i t y W e l l s P W - 8 a n d PW - 9 F l u o r i d a t i o n 0 . 8 m g / L Y e s CC T F W e l l s R W - 1 , R W - 2 , R W - 3 , PW - 8 , P W - 9 a n d E W - 3 pH a d j u s t m e n t u s i n g s o d i u m hy d r o x i d e Me e t r e q u i r e m e n t s o f L e a d an d C o p p e r R u l e Yes We l l H o u s e E W - 3 W e l l E W - 3 C h l o r i n a ti o n ( g a s ) S e c o n d a r y d i s i n f e c t i o n – me a s u r e a b l e r e s i d u a l i n a l l pa r t s o f d i s t r i b u t i o n s y s t e m Yes We l l H o u s e E W - 3 W e l l E W - 3 F l u o r i d a t i o n 0 . 8 m g / L Y e s Sp r i n g b r o o k S p r i n g s Tr e a t m e n t F a c i l i t y Sp r i n g b r o o k S p r i n g s In f i l t r a t i o n G a l l e r i e s Ch l o r i n a t i o n ( g a s ) 4 - l o g i n a c t i v a t i o n ( C T = 6 ) [I n t e r i m c o n f i g u r a t i o n ] Yes Sp r i n g b r o o k S p r i n g s Tr e a t m e n t F a c i l i t y Sp r i n g b r o o k S p r i n g s In f i l t r a t i o n G a l l e r i e s Fl u o r i d a t i o n 0 . 8 m g / L Y e s Sp r i n g b r o o k S p r i n g s Tr e a t m e n t F a c i l i t y Sp r i n g b r o o k S p r i n g s In f i l t r a t i o n G a l l e r i e s pH a d j u s t m e n t u s i n g s o d i u m hy d r o x i d e Me e t r e q u i r e m e n t s o f L e a d an d C o p p e r R u l e Yes Ma p l e w o o d T r e a t m e n t Fa c i l i t y We l l s P W - 1 1 , P W - 1 2 a n d P W - 17 Ch l o r i n a t i o n ( s o d i u m hy p o c h l o r i t e ) 4- l o g i n a c t i v a t i o n ( C T = 6 ) Y e s December 2012 6-15 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 6/Ch06.docx Ta b l e 6 . 3 S o u r c e T r e a t m e n t Go a l s a n d E f f e c t i v e n e s s Fa c i l i t y S o u r c e s T r e a t e d T r e a t m e n t T y p e T r e a t m e n t G o a l G o a l M e t ? Ma p l e w o o d T r e a t m e n t Fa c i l i t y We l l s P W - 1 1 , P W - 1 2 a n d P W - 17 Ch l o r i n a t i o n ( s o d i u m hy p o c h l o r i t e ) Co n v e r t a m m o n i a t o n i t r o g e n ga s ( m o n o c h l o r a m i n e l e s s th a n 0 . 0 2 m g / L , d i c h l o r a m i n e = 0 , t r i c h l o r a m i n e = 0 ) Yes Ma p l e w o o d T r e a t m e n t Fa c i l i t y We l l s P W - 1 1 , P W - 1 2 a n d P W - 17 Ch l o r i n a t i o n ( s o d i u m hy p o c h l o r i t e ) Se c o n d a r y d i s i n f e c t i o n – me a s u r e a b l e r e s i d u a l i n a l l pa r t s o f d i s t r i b u t i o n s y s t e m Yes Ma p l e w o o d T r e a t m e n t Fa c i l i t y We l l s P W - 1 1 , P W - 1 2 a n d P W - 17 Fl u o r i d a t i o n 0 . 8 m g / L Y e s Ma p l e w o o d T r e a t m e n t Fa c i l i t y We l l s P W - 1 1 , P W - 1 2 a n d P W - 17 Di s s o l v e d o x y g e n p l u s gr a n u l a r a c t i v a t e d c a r b o n Co n v e r t h y d r o g e n s u l f i d e t o hy d r o g e n s u l f a t e ( d i s s o l v e d hy d r o g e n s u l f i d e l e s s t h a n 0. 0 0 1 m g / L ) Yes Ma p l e w o o d T r e a t m e n t Fa c i l i t y We l l s P W - 1 1 , P W - 1 2 a n d P W - 17 Gr e e n s a n d f i l t e r s u s i n g ch l o r i n e ( s o d i u m hy p o c h r o r i t e ) a s t h e o x i d a n t Re m o v e i r o n a n d ma n g a n e s e ( n o s t a i n i n g ) Yes We l l H o u s e 5 W e l l P W - 5 C h l o r i n a t i on ( g a s ) S e c o n d a r y d i s i n f e c t i o n – me a s u r e a b l e r e s i d u a l i n a l l pa r t s o f d i s t r i b u t i o n s y s t e m Yes We l l H o u s e 5 W e l l P W - 5 F l u o r i d a t i o n 0 . 8 m g / L Y e s We l l H o u s e 5 W e l l P W - 5 F u t u r e t r e a t m e n t f o r am m o n i a , i r o n , m a n g a n e s e an d h y d r o s u l f i d e Si m i l a r g o a l s a s t h e Ma p l e w o o d t r e a t m e n t f a c i l i t y No. Not yet in CIP December 2012 6-16 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 6/Ch06.docx Microbiological and certain physical and chemical parameters are analyzed by locally contracted commercial laboratories. This approach has worked well for meeting the City's sampling and testing needs. The City also maintains nine mechanical type well sampling pumps for extracting water quality samples from monitoring wells. These pump units can be used for the collection of all types of water quality samples, including volatile organic chemicals. A detailed description of the water quality sampling methods, the sampling locations, sampling frequency, and record keeping procedures are listed in the Drinking Water Quality Monitoring Program included as Appendix H. The estimated costs for the City's water quality monitoring are included in Chapter 8, Operations and Maintenance. 6.6.4 Corrosion Control Program 6.6.4.1.1 Lead and Copper Rule In the past, there were relatively high copper levels, and occasionally high lead levels, at home taps because of the relatively low pH of the downtown wells (RW-1, RW-2, RW-3, PW¬8, PW-9, and EW-3) and Springbrook Springs water supplies. The raw water pH range is 6.3 to 6.6 for the downtown wells and about 7.2 for the Springs. Treatment with gaseous chlorine depresses the pH to slightly below the 6.3 to 6.6 range. Without pH adjustment, the levels in the distribution system typically range from 5.9 to 6.4. Water with pH less than 7.5 is aggressive in leaching copper and lead from the pipelines. A secondary corrosion-related concern is iron levels and associated colored water occurrences in areas of the distribution system with old, unlined cast iron and steel pipe. Lower pH levels often cause heavy corrosion of the iron and scale buildup, which can result in red water complaints when flushing or if there are surges in flow in the pipelines. 6.6.4.1.2 Corrosion Protection: Source of Supply As a result of the low pH levels, the City has added corrosion control treatment to its downtown wells and Springbrook Springs. Sodium hydroxide is added to these sources to raise the pH to between 7.5 and 7.7. The pH of the raw water from the Maplewood wells (PW-11, PW-12, and PW-17) is approximately 8.1 and that of the treated water is about the same. Well 5A water has a pH of approximately 8 and phosphate inhibitor can be added. The Corrosion Control Recommendation Report (March 1995) found that no additional corrosion control treatment processes are required for these sources. 6.6.4.1.3 Corrosion Protection: Distribution Mains Since about 1976 the City has required that all water mains installed in the City be cement- lined ductile iron pipe. Additionally, since 1980 the City has required that water mains installed in high resistivity soils be wrapped in polyethylene. Beginning in 1994, the City December 2012 6-17 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 6/Ch06.docx specifications have required that all water mains be wrapped in polyethylene. These requirements were established to reduce the internal and external corrosion of water mains. In a few of the locations where the City’s water mains are within the influence area of other utility lines that are protected with impressed current cathodic protection systems, the City’s water mains are electrically bonded and/or protected with sacrificial anodes. Test stations are installed. Testing is random and infrequent at this time. 6.6.4.1.4 Corrosion Protection: Steel Reservoirs and CT Pipeline Three of the City’s seven steel reservoirs are protected with impressed current cathodic protection systems (Mt Olivet, Highlands 565, and Rolling Hills 590). The West Hill reservoir has an impressed current cathodic protection system installed, but so far there has not been a need to energize it. The seven reservoirs are inspected by a corrosion control consultant approximately every five years. The inspections examine the protective coatings as well as the cathodic protection systems. The interior and exterior protective coatings are repaired and/or replaced as recommended by the consultant. Impressed current systems are checked annually. Adjustments and maintenance actions are made to the impressed current systems based upon the consultant’s recommendations. The CT Pipeline used to provide primary disinfection for wells RW-1, RW-2, and RW-3 has an impressed current cathodic protection system installed but there has not been a need to energize it. 6.7 STATE AND FEDERAL REGULATORY REQUIREMENTS This section presents the current water quality standards of DOH and the EPA through the Safe Drinking Water Act (SDWA). The City should continue to track new water quality regulations, offer comments on draft rules as appropriate, and plan for any additional monitoring and/or treatment as may be required. The following subsections contain descriptions of specific rules that are new or pending or have special requirements for the City in addition to requirements of the federal SDWA. All rules that are included in the SDWA and that apply to Renton are shown in Table 6.3. Water Quality Monitoring Report for the Year 2011 (Appendix H) provides an illustration of the current monitoring requirements for the system as well as State Waivers that currently apply to the system. 6.7.1 Total Coliform Rule The City's water system is classified as a Group A public water system according to DOH. Drinking water samples must be collected for bacteriological analysis from representative points in the distribution system at regular time intervals. The number of water samples is dependent upon the population being served by the system. The City is required to have a Coliform Monitoring Plan on file and approved by DOH. This plan identifies coliform monitoring locations and sampling procedures. The City’s Coliform Monitoring Plan is included as Appendix A of the Drinking Water Quality Monitoring Program, Appendix H of the Water System Plan. Testing for bacteria (total coliforms) has been less than the MCL December 2012 6-18 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 6/Ch06.docx (5%) during the past six years. The range has been between 1.0% (in 2010) and 3.3% (in 2008) with the median being 1.5%. 6.7.2 Stage 1 & 2 Disinfectants and Disinfection Byproducts Rules Because Renton uses chlorine for disinfection, it needs to meet the requirements of the Stage 1 and Stage 2 Disinfectants / Disinfection Byproducts Rules (D/DBPR). It meets these requirements of the Stage 1 D/DBPR and has been collecting and testing samples in preparation for meeting the Stage 2 D/DBPR. For the City of Renton routine monitoring for the Stage 2 D/DBPR begins on October 1, 2012. See Appendix H, Drinking Water Quality Monitoring Program of this plan for details. Table 6.4 Existing and Future Requirements of the Safe Drinking Water Act Regulation Effective / Compliance Dates Regulation Summary and City Status Existing Requirements Total Coliform Rule (TCR) Effective December 1990  The City meets the requirements of this rule. Ground Water Rule Effective November 2006. Compliance by November 2010.  The City meets the requirements of this rule. Inorganic Chemicals (IOCs) Various  The City meets the requirements of the rules regulating these contaminants. Arsenic Rule Effective January 2001. Compliance by January 2006.  The City meets the requirements of this rule. Radionuclides Effective December 2003. Compliance by December 2006.  The City meets the requirements of the rules regulating these contaminants. Lead and Copper Rule Various  The City meets the requirements of the rules regulating these contaminants. SOCs and VOCs Various  The City meets the requirements of the rules regulating these contaminants. Stage 1 Disinfectants / Disinfection Byproducts Rule Effective December 1998. Compliance by January 2004.  The City meets the requirements of this rule. December 2012 6-19 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 6/Ch06.docx Table 6.4 Existing and Future Requirements of the Safe Drinking Water Act Regulation Effective / Compliance Dates Regulation Summary and City Status Stage 2 Disinfectants / Disinfection Byproducts Rule Effective January 2006. Compliance by October 2012.  Renton is a “Schedule 2” system. Received 40/30 Certification. Must submit a Stage 2 DBPR Compliance Monitoring Plan to DOH and begin complying with the monitoring requirements prior to October 1, 2012.  Must begin complying with rule requirements to determine compliance with the operational evaluation levels for TTHMs and HAA5s prior to July 2013. Lead and Copper Rule Short-term Revisions As per the Washington State DOH the anticipated effective date is October 2011.  The purposes of the proposed Short- Term Revisions are: clarifying monitoring requirements, improving consumer awareness and modifying lead service line replacement requirements. Future Requirements Revisions to the Total Coliform Rule (RTCR) Proposed rule published July 14, 2010. Final rule scheduled for promulgation in 2012.  The City is monitoring the development of the rule.  The City does not anticipate any problems complying with the revisions. Perchlorate In 2009 the EPA decided to reverse its prior decision not to regulate perchlorate. In February 2011 the EPA decided to regulate perchlorate. In its February 2011 announcement the EPA stated it expects to publish a proposed regulation by February 2013 and promulgate a final regulation by August 2014.  The City is monitoring the development of the rule.  The City tested all of its sources for perchlorate in 2002 and 2003 (and Maplewood Well field in 2009) and did not detect any perchlorate. December 2012 6-20 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 6/Ch06.docx Table 6.4 Existing and Future Requirements of the Safe Drinking Water Act Regulation Effective / Compliance Dates Regulation Summary and City Status Lead and Copper Rule Short-Term Revisions EPA published final rule changes in October 2007. DOH plans to implement changes prior to the October 2011 deadline.  The City is monitoring DOH’s implementation of the rule.  Potential changes: flushing guidance and sample collection after service line replacement, lead service line replacement programs, sample site criteria, corrosion control guidance, and tap sampling issues. Unregulated Contaminant Monitoring Rule 3 (UCMR 3) As proposed the sampling would occur during the period 2013 through 2015. The proposed monitoring includes two viruses and 28 unregulated chemical contaminants.  The City is monitoring the development of the rule. Fluoride  The US Department of Health and Human Services has requested comment on lowering the recommended level of fluoride to 0.7 mg/L.  The City is monitoring both the EPA and DOH response to the request. 6.7.3 Ground Water Rule The Ground Water Rule went into effect November 1, 2010. The City is complying with the rule. The City plans to add 4-log treatment of viruses and compliance monitoring to the following sources: PW-8, PW-9, EW-3, and Springbrook Springs. The following sources already have 4-log treatment of viruses and compliance monitoring: RW-1, RW-2, RW-3, PW-11, PW-12, and PW-17. See Chapters 2, Existing System and Chapter 9, Capital Improvement Program for discussion of the addition of treatment and Appendix H, Drinking Water Quality Monitoring Program of this plan for details. 6.7.4 Radionuclides Rule The City is complying with the rule. During the last sampling and testing period (June 2010) the levels of Gross Alpha particles and Radium 228 were below the detection limit. See Appendix H, Drinking Water Quality Monitoring Program of this plan for details. December 2012 6-21 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 6/Ch06.docx 6.7.5 Inorganic Chemical Analysis The City is required by DOH to take samples for inorganic chemical analysis at the source after treatment. The complete inorganic chemical and physical analysis shall include the primary and secondary chemical and physical drinking water contaminants. The analyses on its well sources must be performed is every three years, except that nitrate must be monitored annually. 6.7.6 Organic Chemical Analysis Volatile organic chemicals (VOCs) and synthetic organic chemicals (SOCs) are monitored in all of the City's wells. Organic chemical monitoring standards require one sample every 3 months during the first 12 months. However, if no contaminants are detected in the first sample of a groundwater source, the purveyor shall sample that source once more during the 12-month period. If no chemicals are verified after the initial 12 months of monitoring, the purveyor shall monitor each source at least once every 36 months. Water must be sampled from each source and must be collected after the water has been treated. Recent chemical analyses of the City's supply sources show no contamination from VOCs or SOCs. The City must test for trihalomethanes at all wells once a year since they are chlorinated. In the late 1980s tetrachloroethylene (PCE) was detected in the downtown wells. The source was found to be condensate from a dry cleaning business that leaked into the ground through a broken side sewer. In 1997 PCE was detected in the downtown wells again. This time the source was determined to be a wash water basin at the Stoneway Concrete site adjacent to Cedar River Park. Well 8 was continuously pumped to waste to clear up the contamination. Recent VOC tests of the downtown wells do not show any PCE contamination. Positive tests for VOCs occurred at PW-5A in 1994. The positive sample in PW-5A was determined to be from a poorly cured coating on the well casing. The City cleaned and purged the well and sandblasted the coating. The City flushes this well for approximately 20 minutes each time it is used prior to connecting to the system. Since this operational modification was implemented, no VOCs have been detected. The state has a susceptibility assessment program which enables water systems to bypass the required quarterly sampling for VOCs the first year. Reduced monitoring is allowed if a susceptibility assessment of the water system indicates a low or moderate vulnerability to contamination. The City submitted a susceptibility assessment to the DOH. Table 6.7 of the susceptibility assessment lists the ratings given to each well by the DOH and the required testing. These susceptibility ratings are also shown in the Water Quality Monitoring Report for the Year 2011 (Appendix H). Although the susceptibility of Well 5A to contamination is rated low, quarterly testing for VOCs continues to be required (when the well is being used) because of the earlier positive test. Ongoing quarterly testing is performed at the downtown December 2012 6-22 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 6/Ch06.docx wells and the Springs because of the medium to high vulnerability of these sources to contamination. The state has an area waiver program for SOC monitoring. Under this program, the City can reduce its SOC testing requirements (and costs) at its wells by participating in the funding of the area waiver program. Several City wells have received waivers to testing for SOCs (PW-5A, PW-11, PW-12, and PW-17). Renton is participating in the State Area Waiver Program for sources that did not receive a SOC waiver. Consequently, SOC testing at these wells has been reduced; the testing program for these sources is described in the City’s Drinking Water Quality Monitoring Program, Appendix H. 6.7.7 Lead and Copper See discussion above and Appendix H, Drinking Water Quality Monitoring Program of this plan for details. 6.7.8 Future Regulations The City is monitoring the developments surrounding the following potential rules and rule changes:  Revisions to the Total Coliform Rule.  Revisions to the Lead and Copper Rule.  Proposed Perchlorate Monitoring – not anticipated to effect the City of Renton.  Unregulated Contaminant Monitoring Rule 3 (UCMR3) List of Contaminants.  Changes in the recommended fluoride dose. 6.8 WELLHEAD PROTECTION PROGRAM The 1986 amendments to the federal Safe Drinking Water Act mandated that every state develop a wellhead protection program to protect ground waters that serve as drinking water sources for public water supplies. In 1994 DOH adopted Washington Administrative Code 246-290, which directed Group A public water systems using wells or springs to implement wellhead protection measures. The City of Renton prepared its Wellhead Protection Plan, which was approved by DOH in December 1999. An updated Wellhead Protection Plan is included in this Water System Plan as Appendix L. DOH stipulates that local wellhead protection programs shall, at a minimum, include the following elements:  A completed susceptibility assessment.  A delineated wellhead protection area for each well, wellfield, or spring.  An inventory of contamination sources located in the wellhead protection area that have the potential to contaminate wells or springs. December 2012 6-23 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 6/Ch06.docx  Documentation that delineation and inventory findings are distributed to property owners and regulatory agencies.  Contingency plans for providing alternate sources of drinking water in the event that contamination does occur.  Coordination with local emergency responders for appropriate spill response measures. Compliance with Wellhead Protection Program requirements is part of a broader City effort referred to as the “Aquifer Protection Program.” The Aquifer Protection Program was established in 1988 when the Renton City Council designated Aquifer Protection Areas. The City continues to refer to its program as the “Aquifer Protection Program” rather than “Wellhead Protection Program” since elected officials and citizens are familiar with this term after many years of public education. It should also be noted that the Aquifer Protection Program substitutes the terms “1-year Capture Zone,” “5-year Capture Zone,” and “10-year Capture Zone,” as appropriate, for the term “Wellhead Protection Area.” The City of Renton obtains most of its drinking water supply from shallow aquifers and a spring that are susceptible to contamination. The aquifer has received “sole source” designation from the EPA. As part of its Aquifer Protection Program, the City has enacted aquifer protection regulations to protect the aquifers used as potable water supply sources from contamination by hazardous materials. The regulations include restrictions on hazardous material quantities, storage, and handling; land use restrictions; facility operating standards; construction activity standards; fill quality standards; and other measures intended to prevent contamination. Other components of the Aquifer Protection Program include public education, aquifer water quality and level monitoring, coordination with emergency responders, and coordination with surrounding land use authorities on groundwater protection issues. Please refer to Appendix L for further details. 6.9 SYSTEM RELIABILITY Renton continues to meet its responsibility to its customers and as a water purveyor by addressing the reliability of the water system through the quality and condition of its facilities described earlier in this chapter; through system redundancy; and through the development and implementation of its Vulnerability Assessment and its Water Shortage Response Plan. 6.9.1 Reliability Efforts The City continues to provide reliable water service to its existing customers and plan for long-term reliability of its system for its sources and its distribution network. The City’s primary supply is from its downtown wells, which provide water from the Cedar Valley December 2012 6-24 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 6/Ch06.docx Aquifer and Springbrook Springs. There is an emergency well (EW-3) that can be used in the event that the main wells are unavailable. In addition to the Cedar Valley Aquifer, the City can supply its system from two different sources within its service area, the Maplewood Aquifer (supplemental; not additive) and Well PW-5A. In 2007 the City added emergency electrical generation facilities to supply power to Wells RW-1, RW-2, and RW-3 and to Mt Olivet and North Talbot booster pump stations. See Chapter 2, Existing System and Chapter 9, Capital Improvements Program for further discussion of existing and planned emergency backup power. In addition to its own sources of supply, the City also has eleven existing interties with three neighboring water utilities (plus two 10-inch supply lines to the Renton Boeing Plant from Seattle). The City is also actively participating in and is studying other options for reducing demands and/or providing additional supply. These options include the City’s ongoing Conservation Plan, a future aquifer recharge study, and the continuing examination of opportunities for the use of reclaimed water. 6.9.2 Water Shortage Response Planning The City developed a Water Shortage Response Plan in 1989 to meet its responsibility for planning for emergencies or other short- or long-term shortages that may occur. The City will update its Water Shortage Response Plan in 2012. 6.10 LONG-RANGE WATER SUPPLY PLANNING The City has been decisive and progressive in its water supply planning. As discussed elsewhere in this chapter, the City has pursued and secured independent sources of supply as well as supplemental sources and wholesale supply. The City has pursued its independent acquisition of water sources in order to maintain control over this utility, which is vital to the public health and economic well being of its customers. An important consideration has also been concern with the cost of water supply and the desire to keep water rates low and competitive with neighboring systems and with the region as a whole. As discussed above the predicted range in time that the City’s annual water rights will meet demand is large. Whether or not Well PW-5A is available as a source affects that predicted range. A key decision to be made is whether or not to invest in additional treatment for Well PW-5A or purchase larger amounts of water from SPU. Before investing a large amount of money for treatment of the PW-5A water the City will need to better determine the extent and capacity of the aquifer upon which the well draws. The City will pursue several different approaches to supplement its peak demand requirements (20-year and longer planning period). This includes expanded conservation efforts and strategies, additional storage, the purchase of wholesale water from SPU, December 2012 6-25 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 6/Ch06.docx perfecting additional Qi water rights (Maplewood wells) and the possible use of other technologies such as reclaimed water and aquifer recharge. The City actively participates with other water systems on regional planning, supply, and operating issues. For example, Renton is a member of the East King County Regional Water Association and the Water Conservation Coalition of Puget Sound. Another example is the City’s participation in the recent Puget Sound Regional Water Supply Outlook Study, which assessed the supply sources of the Central Puget Sound Region, explored ways that systems can support each other, and evaluated regional supply options to meet future needs. Under the City’s new contract with SPU, Renton will be participating in the Seattle Regional Supply System (SRSS) via its attendance and participation at SRSS Operating Board meetings. 6.10.1 Regional Water Supply Issues The City of Renton draws its supply, primarily from aquifers in the lower reaches of the Cedar River Watershed. The Cedar Valley aquifer in particular is relatively shallow. However, there is no evidence from studies conducted to date that the City’s water use has an impact on flows in the Cedar River. The Muckleshoot Indian Tribe has an interest in the Cedar River and its fishery resources. The Tribe is concerned with low stream flows that can affect water quality. Renton is monitoring the River as a condition of its water rights and will continue to cooperate with the other parties in the management of this resource. SPU is the regional water purveyor for much of King County. It serves most of the cities and water districts in the vicinity of Renton. Renton itself has agreements with Seattle for supply as already discussed. In recent years, SPU has implemented a successful conservation program that has delayed the need for new sources. The water utilities in the Puget Sound Region have individually and collectively addressed future sources of supply to meet their future needs. SPU has constructed a 120-mgd water filtration plant on its Tolt River source. This improvement in water quality meets current water quality standards and allows SPU to make better use of the Tolt source to meet existing and future demands. The City of Tacoma is the regional system to the south, serving much of Pierce County and some areas in south King County. Tacoma has completed construction of its second supply project. This involves a second supply pipeline from its Green River source which adds another 60 cfs of supply to the Tacoma system. The Tacoma Second Supply Project serves a number of water districts in south King County, some of which are also supplied by SPU. See: http://www.mytpu.org/tacomawater/water-system/supply/regional-water- supply/Default.htm The Growth Management Act requires cities in Washington State to prepare 20-year plans for their future development, including the provision of adequate water supply to support this growth. This has raised concerns with many water utilities because they are often not December 2012 6-26 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 6/Ch06.docx consulted when the land use planning and economic development decisions are made for GMA and many water systems are reaching the capacity of their sources and don’t have the necessary future capacity to meet GMA projections. In addition, the process of obtaining water rights in Washington State has become extremely difficult and time- consuming because of concerns over instream flows and the suspected influence of groundwater withdrawals on stream flows. The current situation has prompted water systems in the Central Puget Sound area to pursue new source development as a top priority. The Cascade Water Alliance was created several years ago with participation of many of the water systems in King County to pursue new regional supplies as an alternative, or in conjunction with SPU and Tacoma. Many of the same systems have also participated in the Puget Sound Outlook Study, which included water utilities in King, Pierce, and Snohomish Counties. As a result of planning by individual water utilities and the efforts of the consortiums mentioned in the previous paragraphs, a number of regional projects have been proposed. The following list describes two of these regional solutions:  The Cascade Water Alliance has purchased water rights formerly held by Puget Sound Energy for hydroelectric generation on the White River, including storage in Lake Tapps and is currently working to get approval to use Lake Tapps as a municipal water supply.  The Snohomish River Regional Water Authority acquired a 36-mgd water right formerly used by Weyerhauser (S1-10617C) for its now abandoned plant in Everett. Various schemes have been proposed for delivering this water to utilities, including some in King County. Use of the water right continues to be under study. The water supply situation is continually changing with alternatives proposed, studied, and sometimes put on the shelf. A number of other alternatives have been considered including the North Fork Tolt River, Snoqualmie Aquifer under the Middle Fork of the Snoqualmie River, the North Fork Snoqualmie River, direct withdrawal from Lake Washington, and even sources as far away as the Skagit River. At the present time, none of these appear to be in serious contention as the next source due to water rights or environmental, cost, or institutional issues. As a participant in forums proposing new supplies, the City of Renton is keeping itself involved and informed of new developments. It will make decisions and act as appropriate to preserve its current supply and/or to participate with other utilities in new or alternative source development. December 2012 6-27 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 6/Ch06.docx 6.11 RECOMMENDED WATER SUPPLY IMPROVEMENTS Recommended improvement projects for water supply can be grouped into the main areas of interties, water quality, and reliability. Specific projects associated with the supply projects are included in Chapter 9. It is recommended that the City maintain and/or renew its existing intertie agreements with adjacent purveyors as well as pursuing additional new interties in order to improve reliability and to help supplement future peak demands. This would include renewing its agreement with Seattle. System reliability can be improved through several approaches that include security and system redundancy. The City has identified several security improvements that are included in its six-year CIP. As redevelopment occurs, the City can improve system reliability by considering options for new PRVs and other control valves that provide additional supply to zones. Additional possible projects for improving supply reliability are aquifer recharge and the use of reclaimed water. The City has not investigated artificial aquifer recharge, but plans to proceed with a study within the next 20 years to look at the feasibility of such a project. The use of reclaimed water has been attempted by the City with limited success to date. Feasible alternatives for using reclaimed water are not anticipated within the next six years. The City has completed the King County Water Reclamation Evaluation Checklist and it is provided as Appendix M. December 2012 7-1 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx Chapter 7 SYSTEM ANALYSIS 7.1 INTRODUCTION The purpose of this chapter is to summarize the City’s water distribution system deficiencies, by evaluating the capacity of storage facilities, pump stations, and pipelines. The evaluation of the pipeline capacities was conducted using the City’s hydraulic model. Evaluations of the remaining utilities were conducted in Microsoft Excel. Improvements identified in this chapter are summarized in the Capital Improvements Plan (CIP) in Chapter 9. 7.2 OPERATIONAL AREAS For the purpose of evaluating storage and pumping capacity, the City’s water distribution system was divided into seven different operational areas, which feed fifteen pressure zones. Table 7.1 summarizes the various operational areas and their associated pressure zones. Figure 7.1 provides an overview of the City’s operational areas and pressure zones; Figure 7.2 presents the hydraulic profile color-coded according to operational areas. Table 7.1 Operational Areas and Pressure Zones Operational Area Pressure Zone Valley Operational Area Valley 196 Pressure Zone West Hill 495 Operational Area West Hill 300 Pressure Zone West Hill 495 Pressure Zone Earlington 370 Pressure Zone Highlands 435 Operational Area Highlands 435 Pressure Zone Kennydale 320 Pressure Zone Kennydale 218 Pressure Zone Highlands 565 Operational Area Highlands 565 Pressure Zone Rolling Hills 590 Operational Area Rolling Hills 590 Pressure Zone Rolling Hills 395 Pressure Zone Rolling Hills 490 Operational Area Rolling Hills 490 Pressure Zone Scenic Hill 370 Pressure Zone East Talbot Hill 300 Pressure Zone Talbot Hill 350 Operational Area Talbot Hill 350 Pressure Zone Talbot Hill 270 Pressure Zone East Talbot Hill 300 Pressure Zone kj kj TT #* kj kj +C kj kj #* kj +Ckj#*#* #* kjkj+C kj #*#* #* #* #* #*#* #* #*#* #*kj kj kj kj kj kj kj kj kjkj kj +C +C +C )I )I )I )I )I )I )I )I )I )I )I )I )I )I %&e(?è ?ç ?Å ?æ?í SE 128th St SE 192nd St 148th Ave SE S 212th St 140th Ave SE 108th Ave Talbot Rd S E Valley Rd SE 176th St Edmonds Ave NE SW 43rd St 84th Ave S Duvall Ave NES Bangor St 132nd Ave SE S 128th St 96th Ave S S W Grad y Wa y N 30th St Park Ave NSE 72nd St SE 164th St 116th Ave SE SE 208th St E M ercer W ay SE May Valley Rd Maplewood BPS West Hill BPS HighlandsBPS HazenReservoir Houser Way BPS Fred Nelson BPS PW-8 PW-9 EW-3 North Talbot BPS South Talbot BPS Tiffany Park BPS PW-12 PW-11 PW-17 Rolling Hills BPS Monroe Avenue BPS PW-5A Mt Olivet Reservoir West Hill Reservoir South Talbot Reservoir North Talbot Reservoir RW-1, 2 & 3 Springbrook Springs Upper & Lower Gallery Springbrook Springs Treatment Plant HighlandsChlorinationFacilityHighlands1.5 & 2.0MG 435Reservoirs Rolling Hills Reservoirs 494 & 594 Highlands0.75 MG565 Reservoir Maplewood Chlorination Facility Maplewood Clearwell Lake Washington Cedar River Green River Panther Lake Lake Boren Black River Forbay May Creek Lake Youngs Green River Springbrook Creek Kent Intertie SWD Station #36 SWD Station #39 SWD Station #37 SWD Station #34 SWD Station #33 SWD Station #38 SkywayWholesale Tukwila Intertie Boeing CSTC Fire Coal Creek IntertieWD 90/Renton Intertie Renton/Seattle Intertie Boeing Plant Meter - East and West Figure 7.1 Water Facility Locations Water System Plan Update City of Renton 02,0004,000 Feet OLegend +C Treatment Plant kj Reservoir #*Well T Spring Pump Station PRV )I Interties Water Distribution System 8" and Smaller 10 - 16" 18" and Larger Roads Waterbody Retail Water Service Area Pressure Zones Valley 196 West Hill 495 Earlington 370 West Hill 300 Highlands 435 Kennydale 320 Kennydale 218 Highlands 565 Rolling Hills 490 Scenic Hill 370 East Talbot Hill 300 Rolling Hills 590 Rolling Hills 395 Talbot Hill 350 West Talbot Hill 300 Talbot Hill 270 December 2012 7-4 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx 7.3 PUMP STATION ANALYSIS The City’s pump stations were evaluated to ensure adequate capacity is available to serve future demands. The City’s design criteria is to provide sufficient reliable sources / pumps to provide the maximum day demand (MDD) for each operational area with the largest pump or source out of service. For the purpose of this study, the term “reliable” refers to a pump station or source of supply that has back-up power. The term “redundant” refers to a pump station or source of supply that can meet demands with the largest pump or well out of service. This section describes the capacity of the existing system and system recommendations to meet identified deficiencies. 7.3.1 Existing System The source and pumping capacity of each operational area was compared to the projected MDD for 2017 and 2031 in the following sections. 7.3.1.1 Valley The Valley reliable sources include the Downtown Wells (total capacity of 11,400 gallons per minute (gpm) from RW1, RW2, RW3, PW8, PW9 and standby EW-3), Springbrook Springs (1,050 gpm) and the SPU connection at Bow Lake (2,800 gpm). The total reliable source capacity for the Valley Operational Area is 15,250 gpm. The largest of these sources is Well 8 at 3,500 gpm. When Well 8 is taken out of service, emergency well EW-3 can be placed in service (at 1,500 gpm) bringing the reliable, firm capacity of the Valley Operational Area to 13,250 gpm. In addition to serving the Valley Operational Area, the Valley sources also provide source capacity to all the higher zones with the exception of the West Hill 495 operational area. For this analysis, the West Hill Operational Area is assumed to be served by the Dimmit BPS and the SPU connection as described in the following section. The Valley sources need to supply the higher zones with 5,763 gpm in 2017 and 7,396 gpm in 2031. These supplies need to be accounted for when comparing the Valley sources with the Valley’s MDD. This comparison is summarized in Table 7.2. As shown in the table, the available source capacity within the Valley is sufficient to fulfill the MDD of the Valley Operational Area and the higher Operational Areas that depend on the Valley sources. 7.3.1.2 West Hill 495 The reliable sources within the West Hill 495 Operational Area include a 700-gpm SPU connection at Station 38 (PRV 35), 1,000 gpm from the West Hill BPS (the West Hill BPS only has sufficient back-up power for 1,000 gpm), and 1,600 gpm from Skyway’s Dimmit BPS. The total reliable source / pump capacity of the West Hill 495 Operational Area is 3,300 gpm. Of these sources, the largest pump / source is the 1,000 gpm pump from the West Hill BPS, bringing the firm, reliable pumping / source capacity to 2,300 gpm. This December 2012 7-5 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx amount exceeds the MDD of the West Hill 495 Operational Area in both 2017 and 2031. A comparison of the projected MDD and the redundant source capacity for the West Hill 495 Operational Area is presented in Table 7.3, and demonstrates that there is sufficient capacity to meet the MDD in the West Hill 495 Operational Area. Table 7.2 Valley Source Capacity Analysis (Existing) 2017 2031 Projected MDD, gpm 3,590 4,306 Available Reliable Sources, gpm Downtown Wells 11,400 11,400 Springbrook Springs 1,050 1,050 SPU 2,800 2,800 Total Source Capacity, gpm 15,250 15,250 Redundant Source Capacity, gpm(1) 13,250 13,250 Offsite MDD, gpm Highlands 435 Operational Area 2,444 3,083 Highlands 565 Operational Area 1,583(2) 2,438(2) Rolling Hills 590 Operational Area 597 639 Rolling Hills 490 Operational Area 458(3) 507(3) Talbot 350 Operational Area 681(3) 729(3) Total Offsite Demands, gpm 5,763 7,396 Total Reliable, Redundant Capacity, gpm 7,487 5,854 Notes: 1. Largest source = Downtown Well 8 (3,500 gpm). If this well were to fail, its capacity could be partially replaced by Emergency Well EW-3 (at 1,500 gpm). 2. Assumed that the Highlands 565 MDD is reduced by 1,500 due to supply from Maplewood. The use of this supplemental supply plus 1,500 gpm from Emergency Well EW-3 (total of 3,000 gpm) used in conjunction with the remaining working Downtown wells is 500 gpm less the than the Qi water rights of the Cedar River Valley wells (11,400 gpm). 3. Sufficient capacity can be provided from the Valley, so that the SPU source is not required. December 2012 7-6 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx Table 7.3 West Hill 495 Source Capacity Analysis (Existing) 2017 2031 Projected MDD, gpm 889 1,051 Available Reliable Sources, gpm West Hill BPS 1,000 1,000 Dimmit BPS (Skyway) 1,600 1,600 SPU 700 700 Total Source Capacity, gpm 3,300 3,300 Redundant Source Capacity, gpm (1) 2,300 2,300 Notes: 1. Largest source = West Hill BPS since the largest pump at the Dimmit BPS is limited to a capacity of 700 gpm. 7.3.1.3 Highlands 435 The reliable sources within the Highlands 435 Operational Area include the Houser Way Booster Pump Station (BPS) at 4,800 gpm, and the Mt Olivet BPS at 4,350 gpm. The total reliable source / pump capacity of the Highlands 435 Operational Area is 9,150 gpm. Of these sources, the largest pump / source is the 2,050 gpm pump from the Houser Way BPS, bringing the firm, reliable pumping / source capacity to 7,100 gpm. In addition to serving the Highlands 435 MDD, the Highlands 435 sources also supply the Highlands 565 Operational Area. The Highlands 565 Operational Area can also be supplied from the Maplewood system (at 1,500 gpm, summarized in the following section). The Highlands 435 sources needed to supply the Highlands 565 Operational Area were determined by subtracting 1,500 gpm from the Highlands 565 MDD. The Highlands 435 sources need to supply the higher zones with 1,583 gpm in 2017 and 2,438 gpm in 2031. The comparison of the Highlands 435 sources to the Highlands 435 and 565 demands is summarized in Table 7.4. As shown in the table, the available source capacity within the Operational Area is sufficient to fulfill the MDD of the Highlands 435 Operational Area. December 2012 7-7 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx Table 7.4 Highlands 435 Source Capacity Analysis (Existing) 2017 2031 Projected MDD, gpm 2,444 3,083 Available Reliable Sources, gpm Houser Way BPS 4,800 4,800 Mt Olivet BPS 4,350 4,350 Total Source Capacity, gpm 9,150 9,150 Redundant Source Capacity, gpm(1) 7,100 7,100 Offsite MDD, gpm (Highlands 565) (2) 1,583 2,438 Total Firm, Redundant Source Capacity, gpm 5,517 4,662 Notes: 1. Largest Pump / Source is the Houser Way 2,050 gpm pump. 2. Assumed that Maplewood would supply 1,500 gpm of the MDD from the Highlands 565 Operational Area. 7.3.1.4 Highlands 565 The reliable sources within the Highlands 565 Operational Area include the Highlands BPS (3,900 gpm) and the Maplewood system (1,500 gpm). The total reliable source capacity is 5,400 gpm. The largest source / pump within the operational area is a 1,500-gpm pump at the Highlands BPS, bringing the operational area’s firm, reliable capacity to 3,900 gpm. The Maplewood system can either serve the Highlands 565 Operational Area or the Rolling Hills 590 Operational Area. For this analysis, it is assumed that it serves the Highlands 565 Operational Area. Additionally, the Maplewood Wells are considered part of the City’s Cedar River Well system, which includes the Downtown wells (in the Valley). The total water rights for the Cedar River wells is 11,400 gpm. It was assumed that for the Valley, Well 8 was out of service (3,500 gpm) and Emergency Well EW-3 was in service. The total capacity used by the Valley for this analysis was 9,400 gpm, which leaves sufficient capacity within the Cedar River water right for 1,500 gpm from the Maplewood system. The comparison of the source capacity and demands for the Highlands 565 Operational Area is summarized in Table 7.5. As shown in this table, the Operational Area has sufficient source capacity for 2017, but will be deficient in capacity by 2031. December 2012 7-8 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx Table 7.5 Highlands 565 Source Capacity Analysis (Existing) 2017 2031 Projected MDD, gpm 3,083 3,983 Available Reliable Sources, gpm Highlands BPS 3,900 3,900 Maplewood 1,500 1,500 Total Source Capacity, gpm 5,400 5,400 Redundant Source Capacity, gpm(1) 3,900 3,900 Notes: 1. Largest pump is the 1,500 gpm pump from the Highlands BPS. 7.3.1.5 Rolling Hills 590 The reliable sources within the Rolling Hills 590 Operational Area include the Rolling Hills BPS. The Rolling Hills BPS has four pumps (two 2,500-gpm and two 1,000-gpm pumps). Each pump has back-up power. However, only two pumps can be run at one time, bringing the total reliable capacity to 5,000 gpm and the firm reliable capacity to 3,500 gpm. The Maplewood system can either serve the Highlands 565 Operational Area or the Rolling Hills 590 Operational Area. For this analysis, it is assumed that they serve the Highlands 565 Operational Area. The comparison of the source capacity and demands for the Rolling Hills 590 Operational Area are summarized in Table 7.6, and as shown in this table, the Operational Area has sufficient source capacity for 2017 and 2031. December 2012 7-9 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx Table 7.6 Rolling Hills 590 Source Capacity Analysis (Existing) 2017 2031 Projected MDD, gpm 597 639 Available Reliable Sources, gpm Rolling Hills BPS(1) 5,000 5,000 Maplewood (assumed in use for 565 zone) 0 0 Total Source Capacity, gpm 5,000 5,000 Redundant Source Capacity, gpm(2) 3,500 3,500 Notes: 1. The Rolling Hills BPS has 4 pumps (2 X 2,500 and 2 X 1,000 gpm). Each has back-up power. However, only two pumps can be run at one time. 2. The largest pump is one of the 2,500-gpm pumps. If this pump is taken out of service, the remaining 2,500-gpm pump can be run along with one 1,000-gpm pump. 7.3.1.6 Rolling Hills 490 The reliable sources within the Rolling Hills 490 Operational Area include the North Talbot BPS at 4,183 gpm, and two SPU connections totaling 1,020 gpm (700 gpm at Station 36 and 320 gpm at Station 37). The total reliable source / pump capacity of the Rolling Hill 490 Operational Area is 5,203 gpm. Of these sources, the largest pump / source is the 1,750 gpm pump from the North Talbot BPS, bringing the firm, reliable pumping / source capacity to 3,454 gpm. In addition to serving the Rolling Hills 490 MDD, the Rolling Hills 490 BPS also provides source capacity to the Rolling Hills 590 Operational Area. The Rolling Hills 490 sources need to supply the higher zone with 597 gpm in 2017 and 639 gpm in 2031. The comparison of the Rolling Hills 490 pumping / sources to the Rolling Hills 490 demands is summarized in Table 7.7, which shows that the available source capacity within the Operational Area is sufficient to meet the MDD of the Rolling Hills 490 Operational Area. 7.3.1.7 Talbot Hill 350 The reliable sources within the Talbot Hill 350 Operational Area include the South Talbot BPS (7,800 gpm), 500 gpm from the North Talbot BPS and a 700-gpm SPU connection at Station 33. The total reliable source / pumping capacity of the Talbot Hill 350 Operational Area is 9,000 gpm. One of the 3,500-gpm pumps from the South Talbot BPS is the largest pump within the Operational Area, bringing the firm, reliable capacity to 5,500 gpm. December 2012 7-10 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx The comparison of the source capacity and demands for the Talbot Hill 350 Operational Area are summarized in Table 7.8. As shown in the table, the Operational Area has sufficient source capacity for 2017 and 2031. Table 7.7 Rolling Hills 490 Source Capacity Analysis (Existing) 2017 2031 Projected MDD, gpm 458 507 Available Reliable Sources, gpm SPU 1,020 1,020 North Talbot BPS 4,183 4,183 Total Source Capacity, gpm 5,203 5,203 Redundant Source Capacity, gpm(1) 3,454 3,454 Offsite MDD, gpm Highlands 590 Operational Area 597 639 Total Offsite Demands, gpm 597 639 Total Reliable Redundant Capacity, gpm 2,857 2,815 Notes: 1. Largest pump is the 1,750-gpm pump from the North Talbot BPS. Table 7.8 Talbot 350 Source Capacity Analysis (Existing) 2017 2031 Projected MDD, gpm 681 729 Available Reliable Sources, gpm South Talbot BPS 7,800 7,800 North Talbot BPS 500 500 SPU 700 700 Total Source Capacity, gpm 9,000 9,000 Redundant Source Capacity, gpm(1) 5,500 5,500 Notes: 1. One of the South Talbot BPS 3,500-gpm pumps is the largest pump in the Operational Area. December 2012 7-11 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx 7.3.2 System Recommendations This analysis found that each of the operational areas had sufficient source / pumping capacity to meet the demands through 2031, except for the Highlands 565 zone, which was deficient by 83 gpm of capacity by the year 2031. For this identified deficit, it is recommended that back-up generators be added to the Monroe Ave BPS, which currently has an unreliable capacity of 2,500 gpm. Additionally for the West Hill 495 Operational Area, the City does not have sufficient sources / pumping within the zone to provide the MDD without resorting to the emergency intertie with Skyway. It is recommended that the City also add back-up power to the remaining two pumps at the West Hill BPS to avoid having to use the Skyway intertie for these emergency conditions. 7.4 STORAGE ANALYSIS The City of Renton reservoir storage requirements are based on the water system configuration, seasonal and daily variation in water-use patterns, and the reliability of various water system components. The following section describes the four components of storage, summarizes the capacity of the existing system to meet the storage needs of each operational area, and presents recommendations to address any identified storage deficits. 7.4.1 Elements of Storage Water storage volumes are comprised of four categories including Operational Storage, Equalizing Storage, Emergency and Fire Flow Storage, and Dead Storage. These components of storage are shown schematically in Figure 7.3 and are described below. 7.4.1.1 Operational Storage Operational storage is the volume used on a day-to-day basis to supply the water system while the sources of supply are in the “off” position. This volume is dependent on the sensitivity of the water level sensors controlling the pumps and is designed to prevent excessive cycling of the pump motors. The operational storage for the City’s reservoirs was determined from the settings in the hydraulic model. These operational volume requirements are summarized in Table 7.9. December 2012 7-12 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx Table 7.9 Operational Storage Volumes Reservoir Diameter, ft Height, ft Operational Band, ft Operational Band, MG North Talbot (5.0) Varies 26.5 3.71 0.92 Mt Olivet (3.0) 113.5 37.2 0 0.00 West Hill (1.4) 48 103 16.48 0.22 Highlands (2.0) Varies 14.5 2.03 0.40 Highlands (1.5) Varies 14.7 2.23 0.34 Highlands (0.75) Varies 35 5.59 0.10 Hazen (4.2) 80 111.8 5.59 0.21 South Talbot (1.5) 100 27 3.51 0.21 Rolling Hills 590 (0.3) Varies 28 2.75 0.02 Rolling Hills 490 (3) 119 26.5 5.84 0.49 Figure 7.3 Fi v e T y p e s o f S t o r a g e R e q u i r e d Wa t e r S y s t e m P l a n U p d a t e City of Renton December 2012 7-14 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx 7.4.1.2 Equalizing Storage Equalizing storage volume is the total volume needed to satisfy the Peak Hourly Demand (PHD) that exceeds the capacity of the supply system. The State of Washington Administrative Code (WAC) 246-290-253 requires that Equalizing storage be provided to provide peak demands and WAC 246-290-230 (5) states: New public water systems or additions to existing systems shall be designed with the capacity to deliver the design PHD quantity of water at 30 psi (210 kPa) under PHD flow conditions measured at all existing and proposed service water meters or along property lines adjacent to mains if no meter exists, and under the condition where all equalizing storage has been depleted. PHD is calculated using hourly demand data from the season of highest water consumption. For this plan, hourly demand data during the two-week period of 7/19/2009 to 8/1/2009 was averaged for each hour of the day for each operating area, as shown in Table 7.10. The demand value for the hour of highest demand is considered PHD, while the average of the 24 hourly demands is MDD. Table 7.10 Diurnal Summer Demand by Operating Area(1) (in gpm) Hour Valley West Hill 495 Highlands 435 Highlands 465 Rolling/Talbot 1 3,607 206 2,011 1,605 1,494 2 3,861 146 1,955 1,661 1,411 3 3,926 184 2,050 1,731 1,501 4 4,313 178 2,047 1,888 1,631 5 3,581 252 2,157 2,175 1,647 6 3,067 418 2,468 2,113 1,764 7 2,612 462 2,486 2,257 1,586 8 2,152 519 2,265 2,247 1,404 9 2,877 561 2,177 2,503 1,456 10 2,958 554 2,164 2,379 1,385 11 3,046 500 1,879 2,028 1,331 December 2012 7-15 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx Table 7.10 Diurnal Summer Demand by Operating Area(1) (in gpm) Hour Valley West Hill 495 Highlands 435 Highlands 465 Rolling/Talbot 12 2,654 489 1,795 2,092 1,406 13 2,378 430 1,724 1,844 1,278 14 2,065 411 4,724 1,772 1,202 15 2,153 356 1,606 1,762 1,285 16 1,786 380 1,543 1,815 1,138 17 2,130 430 1,693 1,803 1,206 18 2,572 435 1,958 1,925 1,233 19 2,258 509 2,107 2,311 1,405 20 2,554 613 2,559 2,730 1,646 21 3,448 681 3,149 3,109 1,629 22 3,283 590 2,739 2,837 1,531 23 3,236 431 2,272 2,183 1,546 24 3,419 311 2,145 1,768 1,464 MDD 2,914 419 2,111 2,106 1,441 PHD 4,313 681 3,149 3,109 1,764 Notes: 1. Compiled from hourly demand data collected during the period of 7/19/2009 to 8/1/2009. Equalizing volume requirements were calculated for each reservoir based on the following equation: 150 min x (PHD – firm, reliable sources) where the PHD was calculated based on peak hour to max day peak factors measured for each operational area. Table 7.11 summarizes the calculated equalizing volumes for each operational area for the years 2017 and 2031. December 2012 7-16 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx Table 7.11 Equalizing Storage Volumes Operational Area PHD / MDD(1) 2017 Equalizing Volume, MG 2031 Equalizing Volume, MG Valley 1.48 0.26 0.31 West Hill 495 1.63 0.08 0.10 Highlands 435 1.49 0.18 0.23 Highlands 565 1.48 0.22 0.29(2) Talbot 350 1.22 0.02 0.02 Rolling Hill 490 1.22 0.02 0.02 Rolling Hill 590 1.22 0.02 0.02 Notes: 1. PHD peak factor measured for each operational area. 7.4.1.3 Emergency Storage / Fire Storage Emergency storage volumes are required to supply reasonable system demands during a system emergency, such as the disruption of the water supply. Disruptions could be caused by transmission pipeline or equipment failure, power outage, valve failure, or other system interruptions, as discussed in Chapter 3. The computation of emergency storage requirements includes consideration of reasonable system disruptions that can be expected to occur within normal planning contingencies as discussed previously. Other major system emergencies, such as those created by an earthquake, are covered under emergency system operation planning. The Water System Design Manual (August 2001, DOH) recommends that, at a minimum, the emergency storage not be less than 200 gal/ERU. This factor was used to calculate the emergency storage requirements. Table 7.12 summarizes the Emergency storage volume requirements for 2017 and 2031. December 2012 7-17 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx Table 7.12 Emergency Storage Volumes Operational Area 2017 2031 ERUs Emergency Storage Volume, MG ERUs Emergency Storage Volume, MG Valley 13,838 2.77 20,558 4.11 West Hill 495 1,405 0.28 1,505 0.30 Highlands 435 9.318 1.86 11,505 2.30 Highlands 565 11,637 2.33 14,203 2.84 Talbot 350 2,719 0.54 2,876 0.58 Rolling Hill 490 1,752 0.35 1,978 0.40 Rolling Hill 590 2,309 0.46 2,485 0.50 Since a fire can occur at any time during the day, the fire storage is required by the WAC (246-290-235). The City of Renton nests their emergency and fire storage. WAC 246-290- 230 (6) states that: If fire flow is to be provided, the distribution system shall also provide MDD plus the required fire flow at a pressure of at least 20 psi (140 kPa) at all points throughout the distribution system, and under the condition where the designed volume of fire suppression and equalizing storage has been depleted. Fire flow demand is the quantity of water required for fire fighting as defined by applicable water system criteria and fire codes. Fighting fires often places the largest demands on a water system because a high volume of water must be supplied over a short time. Such demands require each component of the system to operate at its optimal condition. Consequently, the Washington State Insurance Service Office (ISO) recommends that water systems be designed to convey fire flows during a period of MDD with one major facility out of service. Fire flows required by existing structures vary within the water service area and are discussed in more detail in Section 7.5. The current maximum fire demand for each major operational area is shown in Table 7.13. These fire demands were calculated as the maximum fire demand in each of the pressure zones that make up the operational area. December 2012 7-18 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx Table 7.13 Maximum Fire Flows Operational Area Flow, gpm Duration hours Quantity, MG Location Valley 6,000 4 1.44 Boeing Plant West Hill 495 3,000 3 0.54 Sky Lanai Apartments Highlands 435 5,500 4 1.32 Barbee Mill/Port Quendall Highlands 565 5,000 4 1.2 QFC Talbot 350 6,000 4 1.44 Valley Medical Center Rolling Hill 490 5,000 4 1.2 Eagle Ridge Apartments Rolling Hill 590 5,000 4 1.2 Rolling Hills Apartments Since the City nests Emergency and Fire Storage, the nested volume is determined as the maximum of the emergency and fire volume requirements. This required nested volume is summarized in Table 7.14 for the years 2017 and 2031. Table 7.14 Nested Fire and Emergency Volume Operational Area 2017 2031 Volume, MG Controlling Factor Volume, MG Controlling Factor Valley 2.77 Emergency 4.11 Emergency West Hill 495 0.54 Fire 0.54 Fire Highlands 435 1.86 Emergency 2.30 Emergency Highlands 565 2.33 Emergency 2.84 Emergency Talbot 350 1.44 Fire 1.44 Fire Rolling Hill 490 1.2 Fire 1.2 Fire Rolling Hill 590 1.2 Fire 1.2 Fire 7.4.1.4 Dead Storage Volume Dead storage volume is the volume at the bottom of the storage tank that cannot be used because it is physically too low to be withdrawn from the tank or, if withdrawn from the tank, would result in distribution system water pressures below the acceptable criteria of 20 psi December 2012 7-19 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx during a fire. Storage volume is considered dead if it is located below the outlet pipe and cannot be used because of system hydraulic limitations, or it cannot be used because of water quality problems associated with the volume in this lowest portion of the tank. The dead volume calculations for each reservoir are summarized in Table 7.15. Table 7.15 Reservoir Dead Volume Reservoir (Total Volume, MG) Base Elevation, ft Maximum elevation within zone, ft Required elevation at 20 psi, ft Outlet Elevation, ft Dead Volume, MG North Talbot (5.0) 173.2 130 176.2 199.7 0.00 Mt Olivet (3.0) 146.9 130 176.2 184.1 2.20 Highlands (1.5) 425.6 365 411.2 440.3 0.00 Highlands (2.0) 425.3 365 411.2 439.8 0.00 Highlands (0.75) 534.1 474 520.2 569.1 0.00 Hazen (4.2) 457.5 474 520.2 569.3 2.36 Rolling Hills 590(0.3) 565.5 476 522.2 593.5 0.00 Rolling Hills 490(3) 458 392 438.2 494.5 0.00 West Hill (1.4) 395.6 396 442.2 498.6 0.63 South Talbot (1.5) 326.6 244 290.2 353.6 0.00 7.4.2 Storage Analysis per Operational Area The seven operational areas were evaluated as separate systems to ensure each are provided with the required usable operational, equalizing, fire, and emergency storage volume, as summarized below. 7.4.2.1 Valley Operational Area Storage for the Valley Operational Area is contained within the North Talbot and Mt. Olivet Reservoirs, which have a combined available storage volume of 5.8 MG (8.0 MG less the total dead volume of 2.2 MG). Table 7.16 summarizes the storage analysis for the Valley. Based on the analysis presented in Table 7.16, the Valley has sufficient storage through 2031. However, the operational and equalizing storage needs to be available at a minimum of 30 psi for the highest resident served. The total available reservoir volume available at 30 psi is only 0.12 MG, 1.06 MG less than is required in 2017 and 1.11 MG less than is required in 2031. To address this issue, the City is in the process of connecting high December 2012 7-20 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx elevation residents within the Valley 196 zone to higher pressure zone infrastructure. These improvements will provide adequate fire flow pressures to these high elevation residents as well. Table 7.16 Valley Storage Analysis (Existing) 2017 2031 Required Storage, MG Operational 0.92 0.92 Equalizing 0.26 0.31 Emergency / Fire Flow 2.77 4.11 Total Required Storage, MG 3.95 5.34 Existing Storage, MG North Talbot 5.00 5.00 Mt Olivet 0.80 0.80 Total Existing Storage, MG 5.80(1) 5.80(1) Excess (Deficit) Existing Storage, MG 1.85(2) 0.46(2) Notes: 1. Volume above 30 psi to highest customer is only 0.12 MG. 2. No total deficiency exists, however the existing reservoirs are unable to provide 30 psi for the highest customer. 7.4.2.2 West Hill 495 Operational Area Storage for the West Hill 495 Operational Area is contained within the West Hill Reservoir, which has an available storage volume of 0.77 MG (1.4 MG less the total dead volume of 0.63 MG). Table 7.17 summarizes the storage analysis for the West Hill 495 Operational Area. With the existing reliable sources and reservoirs, the West Hill 495 Operational Area does not have sufficient storage through 2031. However, as shown in Table 7.3, the West Hill 495 Operational Area does have excess pumping capacity and can pump the PHD for the Operational Area (1,449 gpm in 2017 and 1,714 gpm in 2031). This excess pumping capacity can eliminate the need for equalizing storage (0.08 MG in 2017 and 0.10 MG in 2031), resulting in sufficient storage within the West Hill 495 Operational Area. December 2012 7-21 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx Table 7.17 West Hill 495 Storage Analysis (Existing) 2017 2031 Required Storage, MG Operational 0.22 0.22 Equalizing 0.08 0.10 Emergency / Fire flow 0.54 0.54 Total Required Storage, MG 0.84 0.86 Total Existing Storage, MG 0.77 0.77 Excess (Deficit) Existing Storage, MG (0.07) (1) (0.09) (1) Notes: 1. Deficiency can be met by excess capacity of West Hills BPS. 7.4.2.3 Highlands 435 Operational Area Storage for the Highlands 435 Operational Area is contained within the two Highlands 435 Reservoirs, which have an available storage volume of 3.5 MG. Table 7.18 summarizes the storage analysis for the Highlands 435 Operational Area. With the existing reliable sources and reservoirs, the Highlands 435 Operational Area has sufficient storage through 2031. Table 7.18 Highlands 435 Storage Analysis (Existing) 2017 2031 Required Storage, MG Operational 0.74 0.74 Equalizing 0.18 0.23 Emergency / Fire flow 1.86 2.30 Total Required Storage, MG 2.78 3.27 Existing Storage, MG Highlands 435 1.50 1.50 Highlands 435 2.00 2.00 Total Existing Storage, MG 3.50 3.50 Excess (Deficit) Existing Storage, MG 0.72 0.23 December 2012 7-22 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx 7.4.2.4 Highlands 565 Operational Area Storage for the Highlands 565 Operational Area is contained within the Hazen and Highlands 565 Reservoir, which together has an available storage volume of 2.59 MG (4.95 MG less the total dead volume of 2.36 MG). Table 7.19 summarizes the storage analysis for the Highlands 565 Operational Area. With the existing reliable sources and reservoirs, the Highlands 565 Operational Area does not have sufficient storage for 2017 or 2031. In 2017, the Highlands 565 Operational Area has sufficient pumping to offset a portion of the equalizing storage volume (0.12 MG). However, this offset is not sufficient to eliminate the storage deficit in 2017 or 2031. Table 7.19 Highlands 565 Storage Analysis (Existing) 2017 2031 Required Storage, MG Operational 0.31 0.31 Equalizing 0.22 0.29 Emergency / Fire flow 2.33 2.84 Total Required Storage, MG 2.86 3.44 Existing Effective Storage, MG Highlands 0.75 0.75 Hazen 1.84 1.84 Total Existing Storage, MG 2.59 2.59 Excess (Deficit) Existing Storage, MG (0.27) (0.85) 7.4.2.5 Rolling Hills 590 Operational Area Storage for the Rolling Hills 590 Operational Area is contained within the Rolling Hills 590 reservoir, which has an available storage volume of 0.3 MG. Table 7.20 summarizes the storage analysis for the Rolling Hills 590 Operational Area. With the existing reliable sources and reservoirs, the Rolling Hills 590 Operational Area does not have sufficient storage for 2017 or 2031. As shown in Table 7.6 the Rolling Hills 590 Operational Area has sufficient pumping capacity to pump the PHD (729 gpm in 2017 and 779 gpm in 2031) and thus eliminate the equalizing storage volume (0.02 MG). Additionally, because the Rolling Hills BPS is equipped with Auto-Start, Auto-Transfer back-up power, the excess capacity from the BPS can be used to pump fire flow from the Rolling Hills 490 Reservoir. In 2017, the Rolling Hills December 2012 7-23 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx BPS has 2,771 gpm of excess capacity, which can be used to offset 0.67 MG of emergency / fire storage over a period of 4 hours. In 2031, the Rolling Hills BPS has 2,721 gpm of excess capacity, which can be used to offset 0.65 MG of emergency / fire storage over a period of 4 hours. The sum of these two storage offsets (0.69 MG in 2017 and 0.67 MG in 2031) is less than the deficit identified in Table 7.20, and additional storage is still needed. Table 7.20 Rolling Hills 590 Storage Analysis (Existing) 2017 2031 Required Storage, MG Operational 0.02 0.02 Equalizing 0.02 0.02 Emergency / Fire flow 1.20 1.20 Total Required Storage, MG 1.24 1.24 Total Existing Storage, MG 0.30 0.30 Excess (Deficit) Existing Storage, MG (0.94) (0.94) 7.4.2.6 Rolling Hills 490 Operational Area Storage for the Rolling Hills 490 Operational Area is contained within the Rolling Hills 490 reservoir, which has an available storage volume of 3 MG. Table 7.21 summarizes the storage analysis for the Rolling Hills 490 Operational Area. With the existing reliable sources and reservoir, the Rolling Hills 490 Operational Area has sufficient storage through 2031. Table 7.21 Rolling Hills 490 Storage Analysis (Existing) 2017 2031 Required Storage, MG Operational 0.49 0.49 Equalizing 0.02 0.02 Emergency / Fire flow 1.20 1.20 Total Required Storage, MG 1.71 1.71 Total Existing Storage, MG 3.00 3.00 Excess (Deficit) Existing Storage, MG 1.29 1.29 December 2012 7-24 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx 7.4.2.7 Talbot Hill 350 Storage for the Talbot Hill 350 Operational Area is contained within the South Talbot reservoir, which has an available storage volume of 1.5 MG. Table 7.22 summarizes the storage analysis for the Talbot Hill 350 Operational Area. With the existing reliable sources and reservoir, the Talbot Hill 350 Operational Area does not have sufficient storage for 2017 or 2031. As shown in Table 7.8, the Talbot Hill 350 Operational Area has sufficient pumping capacity to pump the PHD (830 gpm in 2017 and 890 gpm in 2031) and thus eliminate the equalizing storage volume (0.02 MG). Additionally, since the 500-gpm pump from the North Talbot BPS has Auto-Start, Auto-Transfer back-up power (and under this analysis is not being used to pump the MDD or PHD), the excess capacity from the BPS can be used to pump fire flow from the Valley. This excess capacity can be used to offset 0.12 MG of emergency / fire storage over a period of 4 hours. The sum of these two storage offsets (0.14 MG) is 0.03 MG less than the deficit identified in Table 7.22. Table 7.22 Talbot Hill 350 Storage Analysis (Existing) 2017 2031 Required Storage, MG Operational 0.21 0.21 Equalizing 0.02 0.02 Emergency / Fire flow 1.44 1.44 Total Required Storage, MG 1.67 1.67 Total Existing Storage, MG 1.50 1.50 Excess (Deficit) Existing Storage, MG (0.17) (0.17) 7.4.3 Storage Recommendations Storage deficits were identified in the following operational areas: Valley, Highlands 565, Talbot Hill 350, and Rolling Hills 590. The identified storage deficits can be mitigated by constructing additional storage. However, in some cases small improvements to existing infrastructure, such as adding back-up power, was shown to alleviate the storage deficiencies rather than adding storage. All recommended projects are summarized below. December 2012 7-25 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx 7.4.4 2017 Improvements  Valley Operational Area: – Construct a new 1.0-MG tank for the Valley Operational Area to improve the ability to serve the highest customers during an emergency. This project could be delayed if the City enters negotiations with SPU for additional supply to this zone. – Alternatively, the City could rezone the Valley 196 Zone to eliminate the high- elevation customers.  Highlands 565 Operational Area: – Install back-up power generators at the Monroe Avenue BPS to allow storage to be provided from the Highlands 435 Zone to the Highlands 565 Zone (will also improve pumping capacity for long-term).  Rolling Hills 590 Operational Area: – Add back-up power to the Maplewood BPS to increase pumping capacity from the Rolling Hills 490 Zone to the Rolling Hills 590 Zone. – Add auto-start, auto-transfer, and back-up power to the Rolling Hills BPS such that three pumps can be operated at the same time.  Talbot 350 Operational Area: – Add auto-start, auto-transfer back-up power to South Talbot BPS to increase pumping capacity and reduce the storage deficit. 7.4.5 2031 Improvements  Highlands 565 Operational Area: – Construct a new Highlands 435 Reservoir to serve both the Highlands 435 and Highlands 565 zones.  Rolling Hills 590 Operational Area: – Add auto-start, auto-transfer to the Maplewood BPS to serve fire flow from the BPS. 7.5 DISTRIBUTION SYSTEM ANALYSIS The calibrated InfoWater model of the City’s Distribution System was used for system analysis of future planning years. Projected system demands were added for the 2017 and 2031 planning years. The model was used to evaluate both typical system conditions during diurnal operations, as well fire flow availability. December 2012 7-26 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx 7.5.1 Evaluation Criteria System policies and criteria were discussed in detail in Chapter 5. The key parameters evaluated with the model were for the system pressure criteria during normal operations and fire flow testing of the system. During normal operations, the minimum pressure as set by DOH and ISO standards during MDD and peak hour demand (PHD) is 30 pounds per square inch (psi) at the service meter. The City’s goal is to provide a maximum of 110 psi at the service meter. Building code requires the installation of individual Pressure Reducing Valves (PRVs) when the meter pressure exceeds 80 psi. 7.5.1.1 Fire Test Model Criteria The fire flow demand and duration requirements for different sized fires are summarized in Table 7.23. During any fire, the minimum pressure within the service area should be greater than 20 psi at the end of the fire. In general, areas zoned residential should have 1,000 gpm available, and areas zoned commercial should have 3,000 gpm available. Figure 7.4 shows the minimum fire flow required at nodes throughout the system based on land use. Table 7.23 Service Criteria for Required Fire Flow Land Use Required Flow (gpm) Required Duration (hours) Single family (< 3,600 sq ft) 1,000 1 Single family (> 3,600 sq ft) 1,500 2 Multifamily and Commercial/Industrial3,000 3 Multifamily and Commercial/Industrial4,000 4 Multifamily and Commercial/Industrial5,000 – 6,000 4 Beyond the general fire requirements, some locations have higher fire requirements as specified by the City’s Fire Marshal. The largest of these fires for each zone are summarized in Table 7.24, and the locations are shown in Figure 7.5. The points are numbered in the format xxx-y, noting the zone (xxx) and a sequential number (y). kj kj TT #* kj kj +C kj kj #* kj +Ckj#*#* #* kjkj+C kj #*#* #* #* #* #*#* #* #*#* #*kj kj kj kj kj kj kj kj kjkj kj +C +C +C%&e(?è ?ç ?Å ?æ?í SE 128th St SE 192nd St 148th Ave SE S 212th St 140th Ave SE 108th Ave Talbot Rd S E Valley Rd SE 176th St Edmonds Ave NE SW 43rd St 84th Ave S Duvall Ave NES Bangor St 132nd Ave SE S 128th St 96th Ave S S W Grad y Wa y N 30th St Park Ave NSE 72nd St SE 164th St 116th Ave SE SE 208th St E M ercer W ay SE May Valley RdLake Washington Cedar River Green River Panther Lake Lake Boren Black River Forbay May Creek Lake Youngs Green River Springbrook Creek Figure 7.4 Fire Flow Requirements Water System Plan Update City of Renton 02,0004,000 Feet O Legend Fire Flow Requirements 1,000 gpm 3,000 gpm +C Treatment Plant kj Reservoir #*Well T Spring Pump Station PRV Water Distribution System 8" and Smaller 10 - 16" 18" and Larger Roads Waterbody Retail Water Service Area Pressure Zones kj kj TT #* kj kj +C kj kj #* kj +Ckj#*#* #* kjkj+C kj #*#* #* #* #* #*#* #* #*#* #*kj kj kj kj kj kj kj kj kjkj kj +C +C +C !( !( !( !( !( !( !( !( !(!( !(!( !( !( !( !( !(!( !( !(!( !( !( !( !(!( !( !( %&e(?è ?ç ?Å ?æ?í SE 128th St SE 192nd St 148th Ave SE S 212th St 140th Ave SE 108th Ave Talbot Rd S E Valley Rd SE 176th St Edmonds Ave NE SW 43rd St 84th Ave S Duvall Ave NES Bangor St 132nd Ave SE S 128th St 96th Ave S S W Grad y Wa y N 30th St Park Ave NSE 72nd St SE 164th St 116th Ave SE SE 208th St E M ercer W ay SE May Valley RdLake Washington Cedar River Green River Panther Lake Lake Boren Black River Forbay May Creek Lake Youngs Green River Springbrook Creek 196-1 196-2 320-7 320-9 320-8 300-6 196-4 196-3 320-10 590-28 590-27 590-26 565-25 565-24 565-23 565-22565-21 495-20 490-19 490-18 435-17 435-16435-15 435-14 370-13 350-12 350-11 300WH-5 Figure 7.5 Large Fire Locations Water System Plan Update City of Renton 02,0004,000 Feet O Legend !(Large Fire Locations +C Treatment Plant kj Reservoir #*Well T Spring Pump Station PRV Water Distribution System 8" and Smaller 10 - 16" 18" and Larger Roads Waterbody Retail Water Service Area Pressure Zones December 2012 7-29 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx Table 7.24 Large Fire Requirements Zone Node Fire Flow No. & Location Node Required Flow (gpm) Required Duration (hours) 196-1 J5297 4050 Maple Valley Highway (Maplewood Golf Course Clubhouse) 3000 3 196-2 J2032 South of Martin Luther King Jr. Way & 68th Ave. S 3000 3 196-3 J3616 NE of Card Rd. S & Talbot Rd. S 3000 3 196-4 J2306 Park Ave. N, between N 6th St. & N 8th St. (Boeing Plant) 6000 4 300WH-5 J6841 NW 4th St. & Taylor Ave. NW (Sky Lanai Apartments, West Hill/Earlington) 3000 3 300-6 J6379 Morris Ave. S & S 18th St. (West Talbot Hill) 1500 2 320 -7 J6665 North of Lincoln Ave. NE & NE 36th St. 876 3000 3 320-8 J2613 N 29th St. & Park Ave. NE 1500 2 320-9 J2345 East of Garden Ave. N & N 6th St. (Paccar Kenworth Plant) 3000 3 320-10 J2789 Lake Washington Blvd., between N 40th St. & N 50th St. (Barbee Mill/Port Quendall, Highlands/Kennydale) 5500 4 350 -11 J4266 NE of S 55th St. & Talbot Rd. S 2066 3000 3 350-12 J619 Talbot Rd. S & S 27th St. (Valley Medical Center - S. Talbot Hill) 6000 4 370 -13 J3115 North of SW 3rd Pl. & Powell Ave. SW (Earlington) 1500 2 December 2012 7-30 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx Table 7.24 Large Fire Requirements Zone Node Fire Flow No. & Location Node Required Flow (gpm) Required Duration (hours) 435 -14 J4036 Kirkland Pl. SE & SE 4th St. 1500 2 435-15 J1196 NE 27th St. & Camas Ave. NE 1500 2 435-16 J1149 North of NE 10th Pl. & Sunset Blvd NE3000 3 435-17 J111 NE 4th St., west of Monroe Ave. NE (Renton Technical College) 3000 3 490 -18 J3285 S 7th St., west of Jones Ave. S 1500 2 490-19 J758 S 18th St., between Eagle Ridge Dr. & Grant Ave. S (Eagle Ridge Apartments - Rolling Hills/Renton Hill) 5000 4 495-20 J5616 82nd Ave. S & S 124th St. 21171 1500 2 565-21 J1247 Hoquiam Pl. NE & 19th St. 21819 1500 2 565-22 J4727 NW of Hoquiam Ave. NE & NE 10th St. (Hazen High School) 3000 3 565-23 J996 NW of NE 4th St. & Monroe Ave. NE (Renton Technical College) 3000 3 565-24 J894 West of Union Ave. SE & SE 4th St. (Highlands) 3000 3 565-25 J895 Union Ave. NE & NE 4th St. (QFC - Highlands) 5000 4 590 -26 J2087 Pierce Ave. SE & SE 19th Ct. 1500 2 590-27 J1771 East of Benson Rd S & S 23rd St. (Fred Nelson Middle School) 3000 3 590-28 J897 Royal Hills Dr. & Monroe Ave SE (Rolling Hills Apartments) 5000 4 December 2012 7-31 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx 7.5.2 Pressure Analysis The model was run in extended period simulation (EPS) for one week at MDD to evaluate general system conditions for near- and long-term planning years. This approach allows the sources, pumps, and tanks to all operate as their SCADA is set. For the runs, the model makes up any water shortage from EW-3 and the SPU Bow Lake Pipeline. Figures 7.6 and 7.7 show the nodes with pressures outside of the planning criteria in 2017 and 2031, respectively. As seen in the figures, many nodes are outside of the target pressure range in 2017. Some additional deficiencies exist in 2031. Of the low-pressure nodes (below 30 psi), some exist adjacent to the Springbrook transmission line. The City has been working to remove connections to this line and onto the adjacent higher pressure line. The model results had other low-pressure nodes near reservoirs; these nodes were excluded in the evaluation as service connections do not exist according to City staff. As seen in Figures 7.6 and 7.7, many high pressures exist in the system. The majority of the Kennydale 320 Zone has very high pressure. Some of the pressure zones cover large elevation ranges, leading to very high pressures at the lower elevations. In addition, the booster pumps commonly discharge into the pressure zones near the bottom of a hill, forcing flow to the tank through the distribution system. This requires the hydraulic grade line (HGL) at the bottom of the hill to be higher than the tank overflow level at the top of the hill. In turn, this boosts the pressure in the lower elevations even higher during pumping than under static conditions based on tank overflow and meter elevation. 7.5.3 Fire Flow Analysis The model was used to test the fire capabilities at the 28 large fire locations, using the fire flow test feature. All of the system nodes with service connections were tested for a minimum pressure of 20 psi during the point fire demands. Table 7.25 summarizes the available fire flow at these locations in both 2017 and 2031. All of the locations have adequate fire flow available, with the exception of two locations in the Kennydale 320 Zone. This zone includes a high-elevation service connection at Lincoln Ave and NE 36th, causing difficulty in maintaining 20 psi during a fire elsewhere in the system. The model was also used for a general fire analysis at 1,000 gpm and 3,000 gpm, testing all of the system nodes with service connections for 20 psi in both 2017 and 2031. Figures 7.8, 7.9, 7.10, and 7.11 show the available fire flows throughout the system. The majority of the Valley Service area is slightly deficient, due to the low-pressure nodes along the Springbrook transmission line. There are limited deficiencies throughout the system, primarily at the ends of smaller dead end lines, and in areas of older 4- and 6-inch piping networks. kj kj TT #* kj kj +C kj kj #* kj +Ckj#*#* #* kjkj+C kj #*#* #* #* #* #*#* #* #*#* #*kj kj kj kj kj kj kj kj kjkj kj +C +C +C%&e(?è ?ç ?Å ?æ?í SE 128th St SE 192nd St 148th Ave SE S 212th St 140th Ave SE 108th Ave Talbot Rd S E Valley Rd SE 176th St Edmonds Ave NE SW 43rd St 84th Ave S Duvall Ave NES Bangor St 132nd Ave SE S 128th St 96th Ave S S W Grad y Wa y N 30th St Park Ave NSE 72nd St SE 164th St 116th Ave SE SE 208th St E M ercer W ay SE May Valley RdLake Washington Cedar River Green River Panther Lake Lake Boren Black River Forbay May Creek Lake Youngs Green River Springbrook Creek Figure 7.6 Nodes With High and Low Pressure 2017 Water System Plan Update City of Renton 02,0004,000 Feet O Legend 2017 Nodes Low Pressure < 30 psi High Pressure > 110 psi +C Treatment Plant kj Reservoir #*Well T Spring Pump Station PRV Water Distribution System 8" and Smaller 10 - 16" 18" and Larger Roads Waterbody Retail Water Service Area Pressure Zones kj kj TT #* kj kj +C kj kj #* kj +Ckj#*#* #* kjkj+C kj #*#* #* #* #* #*#* #* #*#* #*kj kj kj kj kj kj kj kj kjkj kj +C +C +C%&e(?è ?ç ?Å ?æ?í SE 128th St SE 192nd St 148th Ave SE S 212th St 140th Ave SE 108th Ave Talbot Rd S E Valley Rd SE 176th St Edmonds Ave NE SW 43rd St 84th Ave S Duvall Ave NES Bangor St 132nd Ave SE S 128th St 96th Ave S S W Grad y Wa y N 30th St Park Ave NSE 72nd St SE 164th St 116th Ave SE SE 208th St E M ercer W ay SE May Valley RdLake Washington Cedar River Green River Panther Lake Lake Boren Black River Forbay May Creek Lake Youngs Green River Springbrook Creek Figure 7.7 Nodes With High and Low Pressure 2031 Water System Plan Update City of Renton 02,0004,000 Feet O Legend 2031 Nodes Low Pressure < 30 psi High Pressure > 110 psi +C Treatment Plant kj Reservoir #*Well T Spring Pump Station PRV Water Distribution System 8" and Smaller 10 - 16" 18" and Larger Roads Waterbody Retail Water Service Area Pressure Zones kj kj TT #* kj kj +C kj kj #* kj +Ckj#*#* #* kjkj+C kj #*#* #* #* #* #*#* #* #*#* #*kj kj kj kj kj kj kj kj kjkj kj +C +C +C%&e(?è ?ç ?Å ?æ?í SE 128th St SE 192nd St 148th Ave SE S 212th St 140th Ave SE 108th Ave Talbot Rd S E Valley Rd SE 176th St Edmonds Ave NE SW 43rd St 84th Ave S Duvall Ave NES Bangor St 132nd Ave SE S 128th St 96th Ave S S W Grad y Wa y N 30th St Park Ave NSE 72nd St SE 164th St 116th Ave SE SE 208th St E M ercer W ay SE May Valley RdLake Washington Cedar River Green River Panther Lake Lake Boren Black River Forbay May Creek Lake Youngs Green River Springbrook Creek Figure 7.8 2017 1000-gpm Fire Deficiency Water System Plan Update City of Renton 02,0004,000 Feet O Legend Fire Flow Requirements 2017 1000-gpm Nodes Fire Flow Deficiency Meets Fire Flow Requirement +C Treatment Plant kj Reservoir #*Well T Spring Pump Station PRV Water Distribution System 8" and Smaller 10 - 16" 18" and Larger Roads Waterbody Retail Water Service Area Pressure Zones kj kj TT #* kj kj +C kj kj #* kj +Ckj#*#* #* kjkj+C kj #*#* #* #* #* #*#* #* #*#* #*kj kj kj kj kj kj kj kj kjkj kj +C +C +C%&e(?è ?ç ?Å ?æ?í SE 128th St SE 192nd St 148th Ave SE S 212th St 140th Ave SE 108th Ave Talbot Rd S E Valley Rd SE 176th St Edmonds Ave NE SW 43rd St 84th Ave S Duvall Ave NES Bangor St 132nd Ave SE S 128th St 96th Ave S S W Grad y Wa y N 30th St Park Ave NSE 72nd St SE 164th St 116th Ave SE SE 208th St E M ercer W ay SE May Valley RdLake Washington Cedar River Green River Panther Lake Lake Boren Black River Forbay May Creek Lake Youngs Green River Springbrook Creek Figure 7.9 2017 3000-gpm Fire Deficiency Water System Plan Update City of Renton 02,0004,000 Feet O Legend Fire Flow Requirements 2017 3000-gpm Nodes Fire Flow Deficiency Meets Fire Flow Requirement +C Treatment Plant kj Reservoir #*Well T Spring Pump Station PRV Water Distribution System 8" and Smaller 10 - 16" 18" and Larger Roads Waterbody Retail Water Service Area Pressure Zones kj kj TT #* kj kj +C kj kj #* kj +Ckj#*#* #* kjkj+C kj #*#* #* #* #* #*#* #* #*#* #*kj kj kj kj kj kj kj kj kjkj kj +C +C +C%&e(?è ?ç ?Å ?æ?í SE 128th St SE 192nd St 148th Ave SE S 212th St 140th Ave SE 108th Ave Talbot Rd S E Valley Rd SE 176th St Edmonds Ave NE SW 43rd St 84th Ave S Duvall Ave NES Bangor St 132nd Ave SE S 128th St 96th Ave S S W Grad y Wa y N 30th St Park Ave NSE 72nd St SE 164th St 116th Ave SE SE 208th St E M ercer W ay SE May Valley RdLake Washington Cedar River Green River Panther Lake Lake Boren Black River Forbay May Creek Lake Youngs Green River Springbrook Creek Figure 7.10 2031 1000-gpm Fire Deficiency Water System Plan Update City of Renton 02,0004,000 Feet O Legend Fire Flow Requirements 2031 1000-gpm Nodes Fire Flow Deficiency Meets Fire Flow Requirement +C Treatment Plant kj Reservoir #*Well T Spring Pump Station PRV Water Distribution System 8" and Smaller 10 - 16" 18" and Larger Roads Waterbody Retail Water Service Area Pressure Zones kj kj TT #* kj kj +C kj kj #* kj +Ckj#*#* #* kjkj+C kj #*#* #* #* #* #*#* #* #*#* #*kj kj kj kj kj kj kj kj kjkj kj +C +C +C%&e(?è ?ç ?Å ?æ?í SE 128th St SE 192nd St 148th Ave SE S 212th St 140th Ave SE 108th Ave Talbot Rd S E Valley Rd SE 176th St Edmonds Ave NE SW 43rd St 84th Ave S Duvall Ave NES Bangor St 132nd Ave SE S 128th St 96th Ave S S W Grad y Wa y N 30th St Park Ave NSE 72nd St SE 164th St 116th Ave SE SE 208th St E M ercer W ay SE May Valley RdLake Washington Cedar River Green River Panther Lake Lake Boren Black River Forbay May Creek Lake Youngs Green River Springbrook Creek Figure 7.11 2031 3000-gpm Fire Deficiency Water System Plan Update City of Renton 02,0004,000 Feet O Legend Fire Flow Requirements 2031 3000-gpm Nodes Fire Flow Deficiency Meets Fire Flow Requirement +C Treatment Plant kj Reservoir #*Well T Spring Pump Station PRV Water Distribution System 8" and Smaller 10 - 16" 18" and Larger Roads Waterbody Retail Water Service Area Pressure Zones December 2012 7-38 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx Ta b l e 7 . 2 5 S y s t e m F i r e F l o w s Zo n e N o d e F i r e F l o w N o . & L o c a t i o n N o d e R e q u i r e d Fl o w (g p m ) Av a i l a b l e Fl o w 2 0 1 7 (g p m ) Available Flow 2031 (gpm) 19 6 - 1 J 5 2 9 7 4 0 5 0 M a p l e V a l l e y H i g h w a y ( M a p l e w o o d G o l f C o u r s e C l u b h o u s e ) 3 0 0 0 > 3 0 0 0 > 3 0 0 0 19 6 - 2 J 2 0 3 2 S o u t h o f M a r t i n L u t h e r K i n g J r . W a y & 6 8 t h A v e . S 3 0 0 0 > 3 0 0 0 > 3 0 0 0 19 6 - 3 J 3 6 1 6 N E o f C a r d R d . S & T a l b o t R d . S 3 0 0 0 > 3 0 0 0 > 3 0 0 0 19 6 - 4 J 2 3 0 6 P a r k A v e . N , b e t w e e n N 6 t h S t . & N 8 t h S t . ( B o e i n g P l a n t ) 6 0 0 0 > 6 0 0 0 > 6 0 0 0 30 0 W H - 5 J 6 8 4 1 N W 4 t h S t . & T a y l o r A v e . N W ( S k y L a n a i A p a r t m e n t s , W e s t Hi l l / E a r l i n g t o n ) 30 0 0 > 3 0 0 0 > 3 0 0 0 30 0 - 6 J 6 3 7 9 M o r r i s A v e . S & S 1 8 t h S t . ( W e s t T a l b o t H i l l ) 1 5 0 0 > 1 5 0 0 > 1 5 0 0 32 0 - 7 J 6 6 6 5 N o r t h o f L i n c o l n A v e . N E & N E 3 6 t h S t . 8 7 6 3 0 0 0 2491 2458 32 0 - 8 J 2 6 1 3 N 2 9 t h S t . & P a r k A v e . N E 1 5 0 0 > 1 5 0 0 > 1 5 0 0 32 0 - 9 J 2 3 4 5 E a s t o f G a r d e n A v e . N & N 6 t h S t . ( P a c c a r K e n w o r t h P l a n t ) 3 0 0 0 > 3 0 0 0 > 3 0 0 0 32 0 - 1 0 J 2 7 8 9 L a k e W a s h i n g t o n B l v d . , b e t w e e n N 4 0 t h S t . & N 5 0 t h S t . ( B a r b e e Mi l l / P o r t Q u e n d a l l , H i g h l a n d s / K e n n y d a l e ) 55 0 0 4908 4855 35 0 - 1 1 J 4 2 6 6 N E o f S 5 5 t h S t . & T a l b o t R d . S 2 0 6 6 3 0 0 0 > 3 0 0 0 > 3 0 0 0 35 0 - 1 2 J 6 1 9 T a l b o t R d . S & S 2 7 t h S t . ( V a l l e y M e d i c a l C e n t e r - S . T a l b o t H i l l ) 6 0 0 0 > 6 0 0 0 > 6 0 0 0 37 0 - 1 3 J 3 1 1 5 N o r t h o f S W 3 r d P l . & P o w e l l A v e . S W ( E a r l i n g t o n ) 1 5 0 0 > 1 5 0 0 > 1 5 0 0 43 5 - 1 4 J 4 0 3 6 K i r k l a n d P l . S E & S E 4 t h S t . 1 5 0 0 > 1 5 0 0 > 1 5 0 0 43 5 - 1 5 J 1 1 9 6 N E 2 7 t h S t . & C a m a s A v e . N E 1 5 0 0 > 1 5 0 0 > 1 5 0 0 December 2012 7-39 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx Ta b l e 7 . 2 5 S y s t e m F i r e F l o w s Zo n e N o d e F i r e F l o w N o . & L o c a t i o n N o d e R e q u i r e d Fl o w (g p m ) Av a i l a b l e Fl o w 2 0 1 7 (g p m ) Available Flow 2031 (gpm) 43 5 - 1 6 J 1 1 4 9 N o r t h o f N E 1 0 t h P l . & S u n s e t B l v d N E 3 0 0 0 > 3 0 0 0 > 3 0 0 0 43 5 - 1 7 J 1 1 1 N E 4 t h S t . , w e s t o f M o n r o e A v e . N E ( R e n t o n T e c h n i c a l C o l l e g e ) 3 0 0 0 > 3 0 0 0 > 3 0 0 0 49 0 - 1 8 J 3 2 8 5 S 7 t h S t . , w e s t o f J o n e s A v e . S 1 5 0 0 > 1 5 0 0 > 1 5 0 0 49 0 - 1 9 J 7 5 8 S 1 8 t h S t . , b e t w e e n E a g l e R i d g e D r . & G r a n t A v e . S ( E a g l e R i d g e Ap a r t m e n t s - R o l l i n g H i l l s / R e n t o n H i l l ) 50 0 0 > 5 0 0 0 > 5 0 0 0 49 5 - 2 0 J 5 6 1 6 8 2 n d A v e . S & S 1 2 4 t h S t . 2 1 1 7 1 1 5 0 0 > 1 5 0 0 > 1 5 0 0 56 5 - 2 1 J 1 2 4 7 H o q u i a m P l . N E & 1 9 t h S t . 2 1 8 1 9 1 5 0 0 > 1 5 0 0 > 1 5 0 0 56 5 - 2 2 J 4 7 2 7 N W o f H o q u i a m A v e . N E & N E 1 0 t h S t . ( H a z e n H i g h S c h o o l ) 3 0 0 0 > 3 0 0 0 > 3 0 0 0 56 5 - 2 3 J 9 9 6 N W o f N E 4 t h S t . & M o n r o e A v e . N E ( R e n t o n T e c h n i c a l C o l l e g e ) 3 0 0 0 > 3 0 0 0 > 3 0 0 0 56 5 - 2 4 J 8 9 4 W e s t o f U n i o n A v e . S E & S E 4 t h S t . ( H i g h l a n d s ) 3 0 0 0 > 3 0 0 0 > 3 0 0 0 56 5 - 2 5 J 8 9 5 U n i o n A v e . N E & N E 4 t h S t . ( Q F C - H i g h l a n d s ) 5 0 0 0 > 5 0 0 0 > 5 0 0 0 59 0 - 2 6 J 2 0 8 7 P i e r c e A v e . S E & S E 1 9 t h C t . 1 5 0 0 > 1 5 0 0 > 1 5 0 0 59 0 - 2 7 J 1 7 7 1 E a s t o f B e n s o n R d S & S 2 3 r d S t . ( F r e d N e l s o n M i d d l e S c h o o l ) 3 0 0 0 > 3 0 0 0 > 3 0 0 0 59 0 - 2 8 J 8 9 7 R o y a l H i l l s D r . & M o n r o e A v e S E ( R o l l i n g H i l l s A p a r t m e n t s ) 5 0 0 0 > 5 0 0 0 > 5 0 0 0 December 2012 7-40 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx 7.5.4 Recommended Improvements Recommendations for addressing the distribution system deficiencies are organized into projects addressing pressure deficiencies and projects addressing fire flow deficiencies, as presented below. 7.5.4.1 Pressure Zone Improvements As discussed in Section 7.5.3, some areas in the system provide less than the minimum service pressure. The City has been moving low-pressure service connections along the Springbrook transmission line from the Valley Pressure zone to the Talbot Hill 350 and 270 pressure zones. The remaining low-pressure service connections need to be moved to improve meter delivery pressure and increase fire flow capabilities. Several areas in the system exceed the maximum pressure criterion. The Kennydale 320, Rolling Hills 590, Rolling Hills 490, Highlands 560, Highlands 435, Talbot Hill 350, West Hill 495, West Hill 300, and Earlington 370 all experience high pressures. In general, it is recommended that pressures be kept to a minimum to reduce pipe losses due to over- pressurization. Rezoning or creating additional pressure zones is recommended to reduce the system operating pressures, thereby reducing the need for individual service connection PRVs, reducing potential leakage, and reducing the range of elevations served by each zone. Several areas were reviewed for potential rezoning or zone creation, as presented in Figures 7.12 through 7.26. Figure 7.12 presents a legend of the areas reviewed associated with the pressure deficiencies found in the year 2031. The figures show potential improvements, such as locations of new PRVs, closed valves, or extending pump discharge piping to higher elevations. For each of these areas, it is recommended that the City perform a Rezone Study to determine how to best redistribute operating pressures and confirm the required system modifications. The following Rezone Studies are recommended: 1. Kennydale 320/ Highlands 435 Rezone Study. 2. Rolling Hills Rezone Study. 3. Talbot Hill 350 Rezone Study. 4. West Hills Rezone Study. Two specific areas are discussed below. Kennydale 320 Zone As shown on Figure 7.14, it is recommended that the Kennydale 320 Zone be rezoned to match the Valley 196 Pressure Zone. Higher elevation connections, such as near Lincoln Ave and NE 36th, should be served by the Highlands 435 Zone. This modification reduces pressures in the Kennydale 320 Zone, and also improves the ability to maintain 20 psi during kj kj TT #* kj kj +C kj kj #* kj +Ckj#*#* #* kjkj+C kj #*#* #* #* #* #*#* #* #*#* #*kj kj kj kj kj kj kj kj kjkj kj +C +C +C%&e(?è ?ç ?Å ?æ?í SE 128th St SE 192nd St 148th Ave SE S 212th St 140th Ave SE 108th Ave Talbot Rd S E Valley Rd SE 176th St Edmonds Ave NE SW 43rd St 84th Ave S Duvall Ave NES Bangor St 132nd Ave SE S 128th St 96th Ave S S W Grad y Wa y N 30th St Park Ave NSE 72nd St SE 164th St 116th Ave SE SE 208th St E M ercer W ay SE May Valley RdLake Washington Cedar River Green River Panther Lake Lake Boren Black River Forbay May Creek Lake Youngs Green River Springbrook Creek Area 1 Area 2 Area 4 Area 3 Figure 7.12 Areas of Improvement Water System Plan Update City of Renton 02,0004,000 Feet O Legend 2031 Nodes Low Pressure < 30 psi High Pressure 80 to 110 psi > 110 psi +C Treatment Plant kj Reservoir #*Well T Spring Pump Station PRV Water Distribution System 8" and Smaller 10 - 16" 18" and Larger Roads Waterbody Retail Water Service Area Areas of Improvement Pressure Zones kj #* #* kj kjkj+C #* #* #* #* #* #* #* #* kj kj kjkj+C !? !? !? !? !? !? !? !? !? !?!? %&e( New Pressure Zone ...Reduce PRVs 13,14, 26, 43 Connect High Areas . Open PRVs 30, 31 . Reduce PRVs 16, 39 New Pressure Zone Dedicated Transmission Main From Houser Way BPS To Highlands 435 Dedicated Transmission Main From Houser Way BPS To Highlands 435 Close Houser Way BPS Discharge Line West Hill BPS Houser Way BPS PW-8 PW-9 EW-3 Monroe Avenue BPS PW-5A Mt Olivet Reservoir RW-1, 2 & 3 Highlands 1.5 & 2.0 MG 435 Reservoirs Highlands 0.75 MG 565 Reservoir Cedar River May Creek 3 3 2 1 42 38 53 52 2222 4141 3232 13 14 16 26 39 5150 35 31 13 4343 30 3737 4747 665 2 16'' 4'' 14'' 10'' 24'' 8'' 1'' 6'' 42'' 12'' 2.5'' 1.5'' 18''0.75'' 2'' 8'' 8'' 12'' 8'' 8'' 8'' 4'' 16'' 6'' 8'' 16'' 8'' 12'' 8'' 6'' 8'' 6' ' 12'' 4'' 1 2'' 6'' 16'' 16'' 6'' 1 2'' 8'' 12''1 2 '' 1 6'' 1 2'' 4'' 8'' 6''8'' 8'' 16'' 12'' 8'' 4'' 8'' 6'' 8'' 12'' 12'' 8'' 16'' 16'' 6'' 2'' 4'' 4'' 6'' 8'' 10'' 4'' 1 2'' 6'' 8'' 4'' 6'' 4'' 6'' 6'' 6'' 8'' 12'' 8'' 12'' 12'' 1 2'' 10'' 8'' 8'' 8'' 12''1 0'' 12'' 8'' 10'' 4'' 12'' 4'' 10'' 12'' 4'' 16'' 1 2''16'' 8'' 8''12'' 6'' 12 '' 6'' 6'' 16'' 8'' 6'' 8'' 8'' 8'' 8'' 16'' 12'' 8'' 8'' 4'' 6'' 8'' 10'' 12'' 6'' 8'' 8'' 6'' 10'' 4'' 4'' 12'' 16'' 6'' 8'' 6'' 16'' 6'' 12'' 8'' 8'' 8'' 10'' 8'' 12'' 8'' 10'' 8'' 1 0'' 12'' 8'' 4'' 4'' 1 2'' 6'' 4'' 12'' 12'' 6'' 8'' 8'' 6'' 8'' 6'' 12'' 4'' 1 6'' 8'' 6'' 12'' 6'' 10'' 12'' 10'' 8'' 8'' 8'' 8'' 8'' 12'' 8'' 8'' 6'' 16'' 8'' 6''8'' 6'' 8'' 8'' 8'' 1 2'' 8'' 12 '' 8'' 8'' 4'' 8'' 8'' 6'' 8'' 6'' 8 '' 8'' 8'' 8'' 6'' 12'' 12''12'' 8'' 1 2'' 8'' 6'' 24 ' ' 12'' 6'' 8'' 4'' 6'' 16'' 8'' 12'' 1 2'' 8'' 1 2'' 4'' 6'' 8'' 10'' 8'' 12'' 1 0'' 8'' 8'' 6'' 10'' 8'' 8'' 16'' 8'' 16'' 8'' 8'' 8'' 8'' 4'' 6'' 8'' 8'' 12'' 6'' 12'' 6'' 8'' 8'' 16 '' 12'' 8'' 6'' 10'' 8'' 12'' 10'' 8'' 6'' 8'' 1 2'' 24'' 4'' 6'' 12'' 8'' 8'' 6'' 4'' 8'' 12'' 6'' 16'' 16'' 4'' 10''12'' 8'' 6'' 10'' 12'' 1 2'' 8'' 10'' 6'' 8'' 8'' 4'' 18'' 6'' 8'' 6'' 8'' 8'' 6'' 6'' 6'' 12'' 6'' 12'' 8'' 4'' 8'' 8'' 8'' 12'' 8'' 6'' 12'' 4'' 8'' 8'' 8'' 6'' 8'' 8'' 4'' 6'' 8'' 8'' 8'' 6'' 8'' 8'' 12'' 12'' 12'' 8'' 10'' 8'' 8'' 6'' 16'' 4'' 8'' 6'' 8'' 8'' 10'' 6'' 6'' 16'' 8'' 8'' 8'' 8'' 16'' 8'' 12'' 6'' 8'' 8'' 10'' 6'' 6'' 6'' 8'' 8'' 4'' 12'' 12'' 6'' 12'' 8'' 6'' 8'' 6'' 8'' 8'' 6'' 8'' 8'' 4'' 12'' 8'' 8'' 8'' 1 0'' 6'' 6'' 12'' 8'' 6'' 8 '' 8'' 12'' 8'' 8'' 8'' 8'' 8'' 12''12'' 8'' 12'' 6'' 8'' 8'' 12'' 6'' 8'' 1 0'' 8'' 12'' 12'' 12'' 12'' 12'' 1 2'' 8'' 8'' 6''8'' 8'' 16'' 6'' 8'' 8'' 8'' 8'' 8'' 16'' 8'' 8'' 6'' 12'' 6'' 8'' 8'' 8'' 8'' 8'' 6'' 8'' 12'' 8'' 8'' 6'' 8 '' 8'' 12'' 4''8'' 6'' 8'' 8'' I-405 R A IN IE R A V E 116TH AVE SEE MERCER WAY ABERDEEN AVE NE 85TH AVE S 87TH AVE S 84TH AVE SE JONES AVE NE SE 80TH STLINCOLN AVE NE85TH PL SE CEDAR RIVER TRL SE 88TH ST 12 6 T H A V E S E126TH PL SE SE 95TH WAY N RIVERSI DE DR SE 76TH STISLAND CREST WAY SE 73RD PL86TH AVE SEAVALON DR SE 89TH PLSE 8 8TH PLSE 82ND ST 112TH AVE SE S 114TH ST 127TH AVE SE122ND PL SE S 118TH ST SE 72ND STSE 72ND PL SE 91ST ST S 120TH ST S E 8 0 T H W A Y S 119TH ST S 113TH ST SE 75TH PL120TH PL SE 121ST PL SE85TH AVE SE 121ST AVE SE91ST AVE SE 125TH PL SESE 78TH ST92ND AVE SE 118TH AVE SESE 89TH STSE 77TH PL S 115TH ST 84TH AVE S SE 92ND STLEWIS LN 89T H PL S E SE 90TH ST 89 T H AV E S SE 87TH STSE 79TH STSE 76TH PL SE 76TH CTSE 86TH PLSE 78TH ST SE 88TH PL S 114TH ST 85TH AVE SE 126TH PL SE S E 7 2 N D S TSE 72ND ST I-405 127TH AVE SE Figure 7.13 Area 1 - Kennydale 320/ Highlands 435 Rezone Study Water System Plan Update City of Renton 07001,400 Feet OLegend Proposed Improvements PRV !?Closed Valve Pipeline Pressure Zone +C Treatment Plant kj Reservoir #*Well T Spring Pump Station PRV Water Distribution System 8" and Smaller 10 - 16" 18" and Larger Parcels Waterbody Retail Water Service Area Pressure Zones Valley 196 West Hill 495 Earlington 370 West Hill 300 Highlands 435 Kennydale 320 Kennydale 218 Highlands 565 Rolling Hills 490 Scenic Hill 370 East Talbot Hill 300 Rolling Hills 590 Rolling Hills 395 Talbot Hill 350 West Talbot Hill 300 Talbot Hill 270 kj #* kj kj +Ckj#*#*#* #* #*#*#* kj kj kj kj+C !? !? !? !? !? !? !? !? De d i c a t e d Tr a n s m i s s i o n M a i n Ex t e n d Sc e n i c H i l l 3 7 0 Di s c o n n e c t f r o m Ro l l i n g H i l l s 4 9 0 Ne w P r e s s u r e Z o n e Ex t e n d R o l l i n g Hi l l s 4 9 0 Maplewood BPS Fr e d Ne l s o n B P S No r t h Ta l b o t B P S Tiffany Pa r k B P S PW-12 PW-11PW-17 Ro l l i n g Hi l l s B P S No r t h T a l b o t Re s e r v o i r RW - 1 , 2 & 3 Ro l l i n g H i l l s Re s e r v o i r s 49 4 & 5 9 4 Maplewood Chlorination Facility Maplewood Clearwell Ce d a r R i v e r 8 9 7 4 45 44 22 10 46 48 12 40 66 5 21 Op e n P R V 2 1 14'' 20'' 6'' 18'' 12'' 24'' 4'' 8'' 10'' 1 6'' 2'' 8'' 8'' 8'' 12'' 8'' 4'' 12'' 8'' 8'' 8'' 8'' 1 2'' 8'' 4'' 8'' 4'' 12 ' ' 4'' 4 '' 10'' 8'' 6'' 8'' 4'' 4'' 4'' 12'' 6'' 16''8'' 8'' 12'' 6'' 8'' 8'' 4'' 16'' 8'' 1 2'' 12'' 6'' 6'' 8'' 8'' 8'' 8'' 6'' 6'' 8'' 16'' 8'' 6'' 6'' 8''4'' 8'' 6'' 24'' 6'' 8'' 12''6''8''8'' 8'' 1 2'' 1 6''16'' 8'' 8'' 12'' 6'' 12'' 4'' 8'' 8'' 1 2 '' 10'' 4''8'' 4'' 8'' 6'' 8'' 8'' 10'' 4'' 6'' 8'' 12'' 8'' 6'' 24'' 8'' 8'' 4'' 4'' 1 0'' 1 2'' 8'' 8'' 8'' 6'' 8'' 12'' 12'' 16'' 2 4''8'' 8'' 6'' 8'' 8'' 8'' 8'' 10'' 4'' 6'' 8'' 1 6'' 4'' 6'' 4'' 8'' 24'' 8'' 4'' 12'' 8' ' 6'' 8'' 6'' 8'' 6'' 8'' 8'' 8'' 12'' 1 2'' 8'' 18'' 8'' 6'' 1 0'' 4'' 8''8'' 8'' 8'' 8'' 12'' 6'' 8'' 6'' 4'' 8'' 8'' 6'' 4'' 4'' 6'' 8'' 6'' 8'' 8'' 6'' 16'' 12'' 4'' 4'' 12'' 6'' 8'' 6 ''8'' 8'' 1 2 '' 6''16''6'' 12'' 4'' 8'' 1 2'' 8'' 24'' 6'' 16'' 1 2 '' 8'' 6'' 6'' 4'' 12'' 8'' 8'' 6''12'' 12'' 8'' 8'' 12'' 16'' 8'' 10'' 8 '' 4'' 6'' 16'' 8'' 8'' 6'' 8' ' 8'' 12'' 4'' 8'' 12'' 16'' 8'' 6'' 6'' 6'' 12'' 12'' 6'' 8'' 12'' 12'' 8'' 12'' 4'' 4'' 8'' 8'' 8'' 8'' 8'' 8'' 1 0'' 12'' 8'' 1 2'' 6'' 6'' 16'' 10'' 8'' 12'' 4'' 8'' 8'' 8 '' 8'' 4'' 4'' 12'' 12'' 1 2'' 6'' 8'' 8'' 6'' 4'' 8'' 8'' 1 2'' 8'' 1 0'' 4'' 8'' 16'' 8'' 16'' 6'' 6'' 1 2'' 8'' 6'' 4'' 12'' 6'' 8'' 12'' 24'' 12'' 10'' 8'' 16'' 8 '' 4'' 4 '' 8'' 16'' 8'' 8'' 16''6'' 8'' 8'' 6'' 10'' 12'' 6'' 1 2'' 6'' 1 2 '' 8'' 6'' 6'' 8'' 4'' 16'' 24'' 6'' 8'' 8'' 12'' 8'' 6''16'' 8'' 8'' 8'' 8'' 6'' 8'' 24'' 1 2'' 6'' 8'' 6'' 6'' 8'' 4'' 4'' 6'' 8'' 8'' 8'' 8'' 6'' 8'' 4'' 8'' 8'' 4'' 8'' 8'' 12'' 16'' 18'' 12'' 12'' 8'' 12'' 8''6'' 8'' 12'' 1 2'' 6'' 8'' 8'' 8'' 6'' 12'' 8'' 16'' 16'' 16'' 8'' 10'' 6'' 8'' 12'' 8'' 8'' 1 2'' 10'' 1 6 '' 4'' 6'' 12'' 8'' 8'' 8'' 8'' 6'' 8'' 6'' 6'' 1 2'' 8'' 4'' 8'' 8'' 4'' 1 0 '' I-405 STATE RTE 169 STATE RTE 515 CED A R RIVE R TRL W ALK 108TH AVE CEDAR RIVER TRL S 4TH ST 1 3 6 T H A V E S E SE 160TH ST EDMONDS AVE SE BEACON WAY SE SE 3RD PL SE 158TH STSE 4TH PL INDEX AVE SE S E R O Y A L HIL L S D R S E 15 1 S T S TSE 141ST ST 1 29TH P L S E 120TH AVE SE SE 161ST ST131ST AVE SE SE CEDAR RIDGE DR 140TH AVE SE 1 1 8 T H P L S E 131ST PL SE133RD AVE SE 126T H A VE SE SE 157TH ST SE 144TH ST 1 1 8 T H A V E S E 117TH AVE SE 135TH AVE SE 134TH AVE SE SE 160TH PLSE 149TH ST SE 159TH ST SE 162ND ST 1 1 9 T H P L S E SE 159TH PL 111TH PL SE 121ST AVE SE 129TH CT SE S E 1 5 7 T H P L SE 161ST PL SE 162ND ST S E 16 1 S T S T SE 160TH ST SE 160TH STFigure 7.14 Area 2 - Rolling Hills Rezone Study Water System Plan Update City of Renton06001,200FeetOLegendProposed Improvements PRV !?Closed Valve Pipeline Pressure Zone +CTreatment Plant kjReservoir #*Well TSpring Pump Station PRV Water Distribution System 8" and Smaller 10 - 16"18" and Larger Parcels Waterbody Retail Water Service Area Pressure Zones Valley 196 West Hill 495 Earlington 370 West Hill 300 Highlands 435 Kennydale 320 Kennydale 218 Highlands 565 Rolling Hills 490 Scenic Hill 370 East Talbot Hill 300 Rolling Hills 590 Rolling Hills 395 Talbot Hill 350 West Talbot Hill 300 Talbot Hill 270 +C kjkj +C !?!?!?!?!? !? !? ?Å New Pressure Zone Dedicated Transmission Main From South Talbot BPS Make Springbrook a Dedicated Transmission Main FredNelson BPS South Talbot BPS South Talbot Reservoir Springbrook Springs Treatment Plant 34 25 49 28 36 1229 1 6'' 10'' 6'' 4'' 24'' 20'' 12'' 8'' 12''12'' 8'' 8''8'' 12'' 8''12''10''10'' 10'' 8'' 12'' 10'' 8''6'' 8'' 12'' 8'' 12'' 24''10'' 10'' 24'' 12'' 8''8'' 20'' 10'' 8'' 12'' 12'' 12'' 8'' 10'' 8'' 10'' 6'' 10'' 10'' 10'' 8'' 12'' 10'' 4'' 12'' 16'' 12''12'' 8'' 16''12''8''8'' 8'' 12'' 8'' 8'' 8'' 8'' 8'' 12'' 8'' 8'' 8'' 12''12 '' 24'' 8'' 1 0'' 8'' 10'' 8'' 12''16'' 6'' 8'' 6'' 8'' 10'' 8'' 12''6'' 1 2'' 6''8'' 6'' 6'' 8'' 10''8''8''10'' 12'' 6'' 8'' 8''6''12''10''4'' 10'' 8''8''6''12'' 12'' 8'' 8'' 8'' 10'' 10''8''8'' 6'' 8'' 8'' 12'' 4'' 16'' 12'' 12 '' 8'' 16'' 6'' 12'' 12'' 8'' 8'' 24'' 16'' 6''12'' 8'' 8'' 10'' 8'' 12'' 8'' 8' ' 8'' 8''6''10''10'' 12'' 10'' 12'' 8'' 8'' 12''8'' 10'' 8'' 10''10''12''4'' 8'' 12''10'' 8'' 6''1 2'' 8'' 10''12'' 10'' 8'' 8'' 12'' 12'' 10''10'' 12'' 12'' 12'' 8''12''10'' 10'' 10'' 8'' 12''12''12''8'' 12'' 8'' 12''8''16'' 8'' 12''12''4''12''8''8''8'' 8'' 8'' 12'' 8''10''10''10'' 8'' 6'' 8'' 12'' 16'' 12'' 12'' 12''10'' 8'' 8''8''4'' 8'' 8'' 8''8''12''12'' 12'' 8'' 8'' 8''12'' 10'' 1 0'' 12''6'' 6'' 12''12'' 2 0'' 8''10'' 8'' 12''8'' 8'' 16'' 8''8''8''12'' 16'' 4'' 6'' 12'' 10'' 6''8''24''12'' 8'' 12''12'' 16'' 12'' 8'' 6'' 8''10''8''12'' 12'' 12'' 8'' 4''12'' 12'' 10'' 6'' 4'' 12'' 10'' STATE RTE 515 STATE RTE 167 TALBOT RD S 108TH AVE SE 96TH AVE S BENSON DR S SE CARR RD S 55TH ST SE 192ND ST S 192ND ST BENSON RD S S CARR RD 84TH AVE S S 180TH ST 10 2ND AVE SE E VALL EY H W Y MILL AVE S 106TH AVE SE105TH AVE SES 23RD ST KENNEWICK 88TH AVE S 1 0 6 T H P L S E S 27TH ST SE 176TH ST S 190TH ST S 187TH ST 105TH PL SE S 184TH ST SE 196TH ST 107TH AVE SE 109TH AVE SE 99TH PL S SE 174TH ST SE 29TH ST S 50TH ST 98TH AVE S SE 180TH ST SE 166TH ST 104TH PL SE SE 186TH ST SE 184TH LN 104TH AVE SE SE 181ST ST SE 182ND ST SE 187TH ST SE 173RD ST SE 187TH PL S 194TH ST S E 1 8 0 T H P L SE 190TH ST S 28TH ST31ST ST SE SE 190TH PL JONES AVE SS 30TH P LMAIN C T S SE 195TH ST S E 1 89TH C T SE 188TH PL 103RD PL SE 196TH PL S SE 190TH ST SE 196TH ST 106TH PL SE 109TH AVE SE S 192ND ST STATE RTE 167 108TH AVE SE 106TH AVE SE 108TH AVE SE 104TH PL SE Figure 7.15 Area 3 - Talbot Hill Rezone Study Water System Plan Update City of Renton 0400800 Feet OLegend Proposed Improvements PRV !?Closed Valve Pipeline Pressure Zone +C Treatment Plant kj Reservoir #*Well T Spring Pump Station PRV Water Distribution System 8" and Smaller 10 - 16" 18" and Larger Parcels Waterbody Retail Water Service Area Pressure Zones Valley 196 West Hill 495 Earlington 370 West Hill 300 Highlands 435 Kennydale 320 Kennydale 218 Highlands 565 Rolling Hills 490 Scenic Hill 370 East Talbot Hill 300 Rolling Hills 590 Rolling Hills 395 Talbot Hill 350 West Talbot Hill 300 Talbot Hill 270 kjkj !? !? !? !?!? !?!? New Pressure Zone Extend Pipeline DedicatedTransmission MainFrom West Hills BPSConnect Downstreamof New PRV Serve High-Pressure Areas With Upper Zones; Reduce Pressure in West Hill 300 Connect to Valley West Hill BPSWest HillReservoir 3 1 42 52 41 32 32 35 47 47 2 18'' 1'' 16'' 4'' 1.5'' 12'' 8'' 2'' 10'' 6'' 6'' 8'' 8'' 8'' 12'' 1 2'' 10'' 12'' 4'' 12'' 8'' 8'' 8'' 6''12 '' 2'' 12'' 1 2'' 4'' 12'' 8'' 12'' 6'' 8'' 8'' 8'' 8'' 1 2'' 8'' 8'' 8'' 8'' 6'' 12'' 6'' 1 2'' 12'' 1 2'' 8'' 8'' 10'' 6'' 8'' 8'' 4''6'' 1 2'' 8'' 12'' 8'' 8'' 12'' 8'' 8'' 8'' 12'' 8'' 8'' 8'' 10 ' ' 8'' 8'' 8'' 1 2 '' 10'' 12''4'' 8'' 8'' 2'' 8'' 4'' 8'' 8'' 8'' 8'' 8'' 8'' 12'' 10'' 10'' 12'' 10'' 12'' 1 2'' 8'' 12'' 12'' 8'' 12'' 8'' 6'' 12'' 8'' 12'' 8'' 4'' 4'' 8'' 8'' 12'' 12'' 8'' 10'' 8'' 8'' 8'' 6'' 8'' 8'' 8'' 12'' 10'' 16 '' 10'' 8''16'' 6'' 8'' 8'' 1 2'' 6'' 8'' 12'' 12'' 12'' 8'' 8'' 12'' 8'' 12'' 8'' 8'' 6'' 6'' 8'' 4'' 8'' 12'' 12'' 8'' 8'' 4'' 4'' 8'' 8'' 8'' 8'' 8'' 12'' 8'' 8'' 8'' 2'' 12 ' ' 8'' 8'' 8'' 8'' 1''12'' 8'' 12 ' ' 6''6'' 6'' 8'' 8'' 10'' 6''8'' 8'' 8'' 8'' 1 2'' 8'' 12'' 8'' 12'' 8'' 12'' 8'' 8'' 1 2'' 8'' 12'' 10''12''8'' 10'' 8'' 10 ' ' 1 2'' 10'' 8'' 10'' 6'' 8'' 8'' 10'' 8'' 12'' 8'' 12'' 8'' 8'' 12'' 8'' 12'' 4'' 6'' 6'' 8'' 8'' 8'' 8'' 10'' 12'' 10'' 12'' 4'' 8'' 12'' 8'' 16'' 1 6'' 8'' 8'' 10'' 4'' 12'' 12'' 8'' 8'' 8'' 12'' 12'' 12'' 8'' 12'' 8'' SW 7TH ST R E N T O N A V E S 80TH AVE S S 134TH ST S 128TH ST S 120TH ST SW 3RD PL S 130TH ST S 132ND ST LI ND AVE NW NW 2ND ST 85TH AVE S SW 5TH ST S W 4 T H P L S L A N G S T O N R D 79TH AVE S S 7TH ST S 121ST ST HARDIE AVE NW POWELL AVE SW S 124TH ST 84TH AVE S EARLINGTON AVE SW S 122ND ST SW VICTORIA ST 82ND AVE S S 2ND ST S 3RD ST S 126TH ST 83RD AVE S SW 2ND ST S 125TH ST H A Y E S P L S W S 3R D PL NW 5TH STNW 4TH PL S 134TH PL S 120TH PL S 135TH ST 81ST PL S SW 2ND PL 87TH AVE S S 89TH ST S 127TH ST82ND AVE S79TH AVE S S 125TH ST 80TH AVE S S 120TH ST S 126TH STS 121ST ST 84TH AVE S S 122ND ST S 124TH ST Figure 7.16 Area 4 – West Hills Rezone Study Water System Plan Update City of Renton 0250500 Feet OLegend Proposed Improvements PRV !?Closed Valve Pipeline Pressure Zone +C Treatment Plant kj Reservoir #*Well T Spring Pump Station PRV Water Distribution System 8" and Smaller 10 - 16" 18" and Larger Parcels Waterbody Retail Water Service Area Pressure Zones Valley 196 West Hill 495 Earlington 370 West Hill 300 Highlands 435 Kennydale 320 Kennydale 218 Highlands 565 Rolling Hills 490 Scenic Hill 370 East Talbot Hill 300 Rolling Hills 590 Rolling Hills 395 Talbot Hill 350 West Talbot Hill 300 Talbot Hill 270 December 2012 7-46 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx a fire flow in the lower zone. As the majority of the pressure zone is higher than 110 psi in the future, a rezone will be needed to meet the fire demand. West Hill 300 Zone The West Hill 300 Zone future fire flow capabilities are limited by a high-elevation service connection on a dead-end pipe on South 132nd Street. These high-elevation nodes should be reconnected to the West Hill 495 Zone by extending a pipe to them. These nodes will be connected to an area of high pressure, therefore a new pressure zone should be considered for this area. 7.5.4.2 Fire Flow Improvements A number of pipes require replacement and upsizing to meet the fire flow criteria in future planning years. These projects are summarized in Table 7.26. Figure 7.17 shows the locations of new pipes and pipes recommended for replacement. One new network looping connection was identified. Project Number R-30 could either be replacement of existing Highlands 435 piping to hydrants, or moving hydrants to the adjacent Highlands 565 piping with replacement of a shorter pipe section. The implementation of these recommended improvements along with Talbot Hill rezoning were shown to eliminate all of the fire flow deficiencies identified in the model. Table 7.26 New Pipes and Recommended Pipe Replacement for Fire Flow No. Exist Pipe Size (in.) New Pipe Size (in.) Length (LF) Location New Pipes for Fire Flow N-1 - 10 10 NE 12th St and Monroe Ave NE N-2 - 8 111 S 132nd St Recommended Pipe Replacement for Fire Flow No. Exist Pipe Size (in.) New Pipe Size (in.) Length (LF) Location R-4 6 8 458 97th Ave S and S 178th St R-5 4 8 1,031 S 14th St R-7 6 8 643 Maplewood Ave and Maple Valley Hwy R-11 4, 6 8 1265 S 4th St and Morri Ave S R-12 4 8 56 S 3rd St. and Burnett Ave S R-13 4 8 194 Whitworth Ave S R-14 4 8 73 Houser Way S and Whitworth Ave S R-15 4 8 50 S 2nd St R-16 4 8 874 Houser Way S and Whitworth Ave S December 2012 7-47 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx Table 7.26 New Pipes and Recommended Pipe Replacement for Fire Flow No. Exist Pipe Size (in.) New Pipe Size (in.) Length (LF) Location R-18 4, 6 8 364 SW 4th Pl R-19 4, 6 8 766 Maple Valley Highway R-20 6 8 806 Sunset Blvd N and NE 3rd St R-22 4 8 530 Main Ave S R-23 4 8 30 S 3rd St and Whitworth Ave R-24 4 8 794 SW Langston Rd and Bagley Pl SW R-27 4 8 280 Houser Terrace Apartments R-28 4,6 8 983 Windsor Pl NE R-29 4,6 8 1,793 Monterey l NE and Capri Ave NE R-30 8 10 914 Harrington Pl NE and Sunset Ln NE R-35 6 8 553 NE 10th Pl R-37 6 8 188 N 4th St and Houser Way N R-38 8 12 2,749 SE 162nd St, Lincoln PL SE, SE 21st PL, and Jones PL SE Dead End Pipe Improvements No. Existing Pipe Size (in.) New Pipe Size (in.) Length (LF) Location R-1 6 8 280 Benson Condominiums R-2 6 8 340 Regency Woods Apartment Homes – Grant Ave S R-3 6 8 253 Regency Woods Apartment Homes – Thomas Ln December 2012 7-48 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx Table 7.26 New Pipes and Recommended Pipe Replacement for Fire Flow No. Exist Pipe Size (in.) New Pipe Size (in.) Length (LF) Location R-6 8 170 S 2nd St and Logan Ave R-8 6 12 330 N.4th St and Factory Ave R-9 8 10 537 Renton High School R-10 4 8 170 Renton High School – Tobin St R-17 6 8 124 SW 13th St R-21 8 10 137 Renton Public Library R-25 6 8 210 NW 4th St and Taylor Ave NW R-26 6 8 123 SW Sunset Blvd R-31 6 8 751 NE 6th Pl and Index Pl NE R-32 6 12 1,055 Sunset Ln NE R-34 6,8 10 722 NE 10th St, Greater Highlands Shopping Center, Golden Pines Apartments 6 8 151 R-36 6 8 316 Kenworth Renton Plant – Houser Way N 7.5.5 Annual Pipeline Replacement Program The City’s existing pipes were assessed for their conditions in order to prepare a pipeline replacement program. The condition assessment focused on identifying the remaining useful life (RUL) of the City’s water pipes. The length of time that a pipe is anticipated to remain functional is called the useful life. Useful life depends largely on the pipe material, but can also depend on soil conditions, water constituents, and installation. When a pipe is in service beyond its useful life, the increasing costs of maintenance associated with a failing pipe typically warrant replacement. kj kj TT #* kj kj +C kj kj #* kj +Ckj#*#* #* kjkj+C kj #*#* #* #* #* #*#* #* #*#* #*kj kj kj kj kj kj kj kj kjkj kj +C +C +C%&e(?è ?ç ?Å ?æ?í R36 SE 128th St SE 192nd St 148th Ave SE S 212th St 140th Ave SE 108th Ave Talbot Rd S E Valley Rd SE 176th St Edmonds Ave NE SW 43rd St 84th Ave S Duvall Ave NES Bangor St 132nd Ave SE S 128th St 96th Ave S S W Grad y Wa y N 30th St Park Ave NSE 72nd St SE 164th St 116th Ave SE SE 208th St E M ercer W ay SE May Valley RdLake Washington Cedar River Green River Panther Lake Lake Boren Black River Forbay May Creek Lake Youngs Green River Springbrook Creek R5 R28 R 2 7 R20 R 29 R9 R24 R36 R30 R 4 R19 R22 R31 R16 R11 N2 R8 R7 R33 R2 R1 R18 R34 R 3 R14 R23 R15 R12 N1 R26 R1 7 R21 R32 R10 R35 R13 R25 R6 Figure 7.17 Recommended Replacement for Fire Water System Plan Update City of Renton 02,0004,000 Feet O Legend +C Treatment Plant kj Reservoir #*Well T Spring Pump Station PRV Water Distribution System Existing Pipelines Recommended Improvement for Fire Flow Annual Fire Pipeline Replacement Program Roads Waterbody Retail Water Service Area Pressure Zones December 2012 7-50 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx Table 7.27 presents the estimated useful life of various types of pipe materials found in the City’s pipe data. Table 7.27 Useful Life of Pipes Pipe Material Original Useful Life Assumption (yrs) Asbestos Cement (AC) 70 Cast Iron Pipe (CIP) 60 Ductile Iron Pipe (DIP) 80 Galvanized Steel Pipe (Galv) 50 High Density Polyurethane Pipe (HDPE) 70 Polyvinyl-Chloride Pipe (PVC) 80 Steel Pipe (Steel) 70 RUL is defined as the length of time left before a pipe will reach the end of its useful life. Pipe age and material type were used to determine the RUL of the City’s pipes. The City’s GIS data was used to determine the type of material and year that pipe segments were installed. Table 7.28 presents the total length of pipe according to the year installed and material type. As seen in the table, the majority of the City’s pipes are Cast Iron Pipe (CIP), installed from 1920 to 1980, and Ductile Iron Pipe, installed from the 1970’s to today. The cells of Table 7.28 are color-coded to show the RUL of pipes in that category. For example, the lengths of pipe in the red cells have all reached the end of their useful life (have a remaining useful life of zero). Using these assumptions, approximately 132,000 linear feet (LF) of pipe, or 8 percent, of the City’s pipes have an RUL of 10 years or less. From the data, approximately 24 percent of the City’s pipes are expected to reach the end of their useful life in the next 20 years. Figure 7.18 presents the total length of pipe reaching the end of its assumed useful life by year. All pipes that have already exceeded their useful life are shown in the year 2011. Given a maximum useful life of 80 years for any pipe type, pipes installed today are expected to require replacement in 2091. The figure also presents the annual replacement per year for two scenarios. If the City wishes to start annual replacement of all its pipes from 2011 until 2091, approximately 20,000 LF of pipe would need to be replaced annually. This is shown as a green line on the figure. From the figure, it is apparent that many pipes are expected to reach the end of their useful life by the year 2045. To maintain replacement schedules just until the year 2045, approximately 14,000 LF of pipe would need to be replaced annually. This is shown as a red line on the figure. It is recommended that the City begin an annual pipe replacement program of 14,000 LF per year targeting the pipes that have reached the end of their useful life, and to offset the depreciation of this City asset. Figure 7.19 presents the locations of these pipes. De c e m b e r 2 0 1 2 7-51 pw : / / C a r o l l o / D o c u m e n t s / C l i e n t / W A / R e n t on / 8 5 9 5 A 0 0 / D e l i v e r a b l e s / C ha p t e r 7 / C h 0 7 . d o c x Ta b l e 7 . 2 8 P i p e L e n g t h b y D e c a d e I n s t a l l e d a n d M a t e r i a l T y p e Ma t e r i a l T y p e To t a l L e n g t h ( f t ) b y D e c a d e I n s t a l l e d 19 2 1 - 1 9 3 0 1 9 3 1 - 1 9 4 0 1 9 4 1 - 1 9 5 0 1 9 5 1 - 1 9 6 0 1 9 6 1 - 1 9 7 0 1 9 7 1 - 1 9 8 0 1 9 8 1 - 1 9 9 0 1 9 9 1 - 2 0 0 0 2 0 0 1 - 2 0 1 0 ≥ 2011 Grand Total Ca s t I r o n ( C I P ) 35 2 3, 1 8 2 89 , 9 4 3 33 6 2 9 22 6 , 7 2 6 78 , 2 6 9 4, 8 6 7 17 3 47 437,188 As b e s t o s C e m e n t ( A C ) 29 3 14 , 1 6 0 4, 0 0 2 91 1, 7 3 2 16 20,295 St e e l ( P i p e ( S T ) 28 5 3, 8 5 4 13 , 8 2 2 17 , 1 3 5 21 2 21 9 33 1,800 37,358 HD P E 145 145 Du c t i l e I r o n ( D I P ) 7 22 , 7 8 1 20 6 , 9 9 3 33 6 , 9 8 3 29 5 , 0 0 5 242,044 3,071 1,106,884 PV C 49 5 1, 3 3 9 843 2,677 To t a l 35 2 3 , 4 6 7 9 4 , 0 9 7 6 1 , 6 1 1 2 7 0 , 6 4 4 2 8 5 , 5 6 6 3 4 4 , 2 9 5 2 9 6 , 5 6 6 2 4 4 , 8 7 9 3 , 0 7 1 1 , 6 0 4 , 5 4 8 Le g e n d O v e r 2 0 y e a r s o f R U L B e t w e e n 0 a n d 1 0 y e a r s o f R U L B e t w e e n 1 0 a n d 2 0 y e a r s o f R U L 0 y e a r s U s e f u l L i f e - 10 , 0 0 0 20 , 0 0 0 30 , 0 0 0 40 , 0 0 0 50 , 0 0 0 60 , 0 0 0 70 , 0 0 0 80 , 0 0 0 90 , 0 0 0 10 0 , 0 0 0 2011 2013 2015 2017 2019 2021 2023 2025 2027 2029 2031 2033 2035 2037 2039 2041 2043 2045 2047 2049 2051 2053 2055 2057 2059 2061 2063 2065 2067 2069 2071 2073 2075 20772079208120832085208720892091 To t a l L e n g t h o f P i p e An n u a l R e p l a c e m e n t p e r Y e a r ( 2 0 1 1 - 2 0 4 5 ) An n u a l R e p l a c e m e n t p e r Y e a r ( 2 0 1 1 - 2 0 9 1 ) Figure 7.18 Pi p e s R e a c h i n g E n d o f U s e f u l L i f e Wa t e r S y s t e m P l a n U p d a t e City of Renton %&e(?è ?ç ?Å ?æ?í SE 128th St SE 192nd St 148th Ave SE S 212th St 140th Ave SE 108th Ave Talbot Rd S E Valley Rd SE 176th St Edmonds Ave NE SW 43rd St 84th Ave S Duvall Ave NES Bangor St 132nd Ave SE S 128th St 96th Ave S S W Grad y Wa y N 30th St Park Ave NSE 72nd St SE 164th St 116th Ave SE SE 208th St E M ercer W ay SE May Valley RdLake Washington Cedar River Green River Panther Lake Lake Boren Black River Forbay May Creek Lake Youngs Green River Springbrook Creek Figure 7.19 Pipes Reaching End of Useful Life Water System Plan Update City of Renton 02,0004,000 Feet O Legend Pipes Remaining Useful Life Less Than 0 Years Between 0 and 10 Years Between 10 and 20 Years Greater Than 20 Years Unknown Roads Waterbody Retail Water Service Area Pressure Zones December 2012 7-54 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx 7.6 SUMMARY OF RECOMMENDATIONS The system analysis yielded a number of recommended improvements including pump station, reservoir, pipeline, and pressure zone improvements, as summarized below. Projects to address deficiencies found in the year 2017 are of higher priority than those to address deficiencies in the year 2031. 7.6.1 2017 Improvements Pump Station Improvements:  Install back-up power generators at the West Hills BPS. Storage Improvements:  Construct a new 1.0-MG tank for the Valley Operational Area to improve the ability to serve the highest customers during an emergency. This project could be delayed if the City enters negotiations with SPU for additional supply to this zone.  Alternatively, the City could rezone the Valley 196 Zone to eliminate the high-elevation customers.  Install back-up power generators at the Monroe Avenue BPS to allow storage to be provided from the Highlands 435 Zone to the Highlands 565 Zone (will also improve pumping capacity for long-term).  Add back-up power to the Maplewood BPS to increase pumping capacity from the Rolling Hills 490 Zone to the Rolling Hills 590 Zone.  Add auto-start, auto-transfer, and back-up power to the Rolling Hills BPS such that three pumps can be operated at the same time.  Add auto-start, auto-transfer back-up power to South Talbot BPS to increase pumping capacity and reduce the storage deficit. Pipeline Improvements:  Complete approximately 18,000 LF of pipeline improvements presented in Table 7.26 to address 2017 fire flow deficiencies.  Implement a new Annual Pipeline Improvement Program to address pipes that have reached the end of their useful life. Approximately 14,000 LF of pipeline must be replaced per year as part of this program. It is recommended that this program be completed concurrent with an Asset Management Program. December 2012 7-55 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 7/Ch07.docx Pressure Zone Improvements:  Perform the following Rezone Studies: – Kennydale 320/ Highlands 435 Rezone Study – Rolling Hills Rezone Study – Talbot Hill 350 Rezone Study – West Hills Rezone Study 7.6.2 2031 Improvements Pump Station Improvements:  No additional improvements. Storage Improvements:  Construct a new Highlands 435 Reservoir to serve both the Highlands 435 and Highlands 565 zones.  Add auto-start, auto-transfer to the Maplewood BPS to serve fire flow from the BPS. Pipeline Improvements:  Continue the Annual Pipeline Improvement Program to replace approximately 14,000 LF per year of pipeline that has reached the end of its useful life. Pressure Zone Improvements:  No additional improvements. December 2012 8-1 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 8/Ch08.docx Chapter 8 OPERATIONS AND MAINTENANCE 8.1 WATER SYSTEM MANAGEMENT Organization of the City of Renton’s Water System is described in Chapter 1 of this plan, Chapter 1 – Introduction (see Figure 1.2, City of Renton Drinking Water Organization). The operations and maintenance staff is shown under the Maintenance Services Division within the overall organization of the water system. Descriptions of individual job functions and responsibilities as they relate to specific operations and maintenance activities are described below. 8.1.1 Normal Day-to-Day Operations Normal day-to-day operations of the water utility are the responsibility of the Water Maintenance Services Section under the direction of the Water Maintenance Services Manager, Mr. Ray Sled. The Water Maintenance Services Unit is under the direction of Mr. George Stahl. The Water Maintenance Services Unit is responsible for main flushing; tank and reservoir cleaning; exercising valves and hydrants; leak detection and repair; PRV maintenance and setting; small meter maintenance, repair and calibration; hydrant maintenance and repair, and tie-in of water main extensions. The Water Utility Maintenance Unit is under the direction of Mr. Craig Pray. The Water Utility Maintenance Unit is responsible for the operation, maintenance, and repair of the booster pump stations; wells; treatment systems; treatment plant; supervisory control and data acquisition (SCADA) system, and water quality sampling for operations and regulatory compliance. 8.1.2 Preventive Maintenance Preventive maintenance is performed by both the Water Maintenance Services Section and by contract to private parties. For example, large meter maintenance and calibration is contracted out, whereas painting of components of a booster pump station is usually performed by Water Maintenance Services Section personnel. Large maintenance projects, for example water tank painting, is done by public works contract with contractors selected under public bidding rules. These projects are usually managed by the Water Utility Engineering Section. 8.1.3 Field Engineering Field engineering support is supplied by the Water Utility Engineering Section. In some cases the engineering support is provided by City Staff and in other cases the support comes from engineering consultant firms. The City periodically selects a group of consulting firms that are pre-approved to complete small engineering jobs on a short notice (consultant roster). December 2012 8-2 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 8/Ch08.docx 8.1.4 Water Quality Monitoring Water Quality monitoring is primarily conducted by the Water Utility Maintenance Unit (Unit). The Unit performs both operational and compliance water quality monitoring. Operational water quality monitoring includes: chlorine, fluoride, turbidity, temperature, polyphosphate, iron, manganese, ammonia, hydrogen sulfide, pH, well water level, and well production rates. Compliance water quality monitoring is required by the Federal Safe Drinking Water Act of which most requirements are administered by the Washington State Department of Health and are published in WAC-246-290. Compliance monitoring includes: volatile organic chemical, synthetic organic chemical, trihalomethanes and Haloacetic Acids, inorganic chemical and physical, bacteriological, radionuclides and tap sampling for lead and copper. The City maintains a system of monitoring wells around its production wells for the purpose of detecting contamination of the aquifers before the contaminants reach the productions wells. The Water Utility Engineering Section conducts this monitoring. The Water Utility Engineering Section also monitors the water table levels in the aquifers. All of the test results of compliance monitoring, with the exception of coliform monitoring sampling and monthly fluoride meter calibration check sampling, are stored in the City’s enterprise-wide database. The results of monitoring for aquifer contamination are stored in the City’s enterprise-wide database. Water level data collected by portable sounder is stored in the City’s enterprise-wide database. Water level and water temperature data collected by automated sounder is stored on one of the City’s network servers. 8.1.5 Emergency Response The City of Renton Emergency Response Plan defines how the City will respond to emergencies. This plan is maintained by the City of Renton Emergency Management Director with the City of Renton Fire and Emergency Services Department. The Water System Emergency Response Plan is a sub-plan to the City of Renton Emergency Response Plan. The Water System Emergency Response Plan includes information on security and terrorism threat and response. The Water Maintenance Services Manager is responsible for preparing for and responding to emergencies involving the drinking water system. The Water Maintenance Services Section maintains an emergency call-up list for employees on standby to respond to emergencies after hours on weekdays, on weekends and on holidays. The response to an emergency may vary from a single maintenance technician addressing a relatively minor problem to the City activating the Emergency Operations Center and calling on the state or federal government to lead the response in a large disaster or terrorism incident. 8.1.6 Cross Connection Control Plan The Cross Connection Control Plan is included in Appendix G of this Water System Plan. Most potential cross connections are identified through the plan review and building permit December 2012 8-3 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 8/Ch08.docx review process. The Water Utility Engineering Section and the Development Engineering Section work together to identify potential cross connections during the plan review process for proposed development projects. Cross connections that are identified are eliminated or are controlled by the installation of backflow prevention assemblies. The cross connection control specialist in the Water Utility Engineering Section works with the building inspectors in the Development Engineering Section to ensure that cross connections which are discovered during inspections are either eliminated or controlled by the installation of approved backflow prevention assemblies. The Cross Connection Control Specialist maintains records on the City’s enterprise-wide database of installed backflow prevention assemblies including installation and test history, and information on the cross connection which they secure. The database is also used to generate test notices to send to the owners of the backflow prevention assemblies. The City uses XC2 Software LLC’s, XC2 software, to input information, query information, and generate reports, including test notices from the database. Members of the Water Maintenance Services Section, Water Utility Engineering Section, Development Engineering Section and Building Section are always on the alert to discover cross connections as they go about their duties throughout the City and its built environment. If cross connections are discovered they are reported to the City’s Cross Connection Control Specialist. 8.1.7 Capital Improvement Program Implementation of the Water Utility’s capital improvement program is primarily the responsibility of the Water Utility Engineering Supervisor. Most of the improvements are done by public bid contracts. The Water Utility Engineering Supervisor works closely with the Water Maintenance Services Manager to identify and prioritize capital improvements. See Chapter 9, Capital Improvement Program, for more information. 8.1.8 Budget Formulation The Water Utility Engineering Supervisor formulates the Water Utility capital improvement program budget and the Water Maintenance Services Manger formulates the operations and maintenance budget. Both work closely with their Division Directors and the Public Works Department, Principal Financial and Administrative Analyst, to formulate their budgets. The Principal Financial and Administrative Analyst works with Finance Division staff to formulate the complete Water Utility budget. 8.1.9 Response to Complaints Complaints and questions are fielded by members of both the Water Utility Engineering Section and Water Maintenance Services staff. All water quality complaints are forwarded to the Maintenance Services Division secretary (425-430-7400) for logging, response and tracking and follow up by the Water Maintenance Services Section. December 2012 8-4 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 8/Ch08.docx 8.1.10 Public and Press Contact Contact with the media is handled by the City of Renton Communications Director or his/her representative. The Development Services Division mans a customer service counter on the sixth floor of Renton City Hall. Members of the Water Utility Engineering section often report to the customer service counter to assist customers with questions about water quality and water service availability. 8.1.11 Billing Billing for the Drinking Water Utility, as well as for the wastewater, storm, and solid waste utilities, is performed by the Fiscal Services Division of the Finance and Information Technology Department. The water meter readers work under the Water Maintenance Services Manager. Billing problems are referred to Utility Billing staff in the Finance and Information Technology Department. 8.2 OPERATOR CERTIFICATION The City of Renton’s drinking water system is classified as a Group 4 distribution system because the system serves a population of greater than 50,000. The Maplewood Water Treatment Plant treats water to remove iron and manganese using green sand filtration; converts hydrogen sulfide to sulfate through the addition of oxygen in conjunction with catalytic conversion on granular activated carbon, and removes ammonia by reacting it with chlorine to convert it to nitrogen gas. Additionally, the water is treated with fluoride. The plant is considered a Class III purification plant (Association of Boards of Certifications classification). Water pumped by wells RW-1, RW-2, and RW-3 receives primary disinfection by flowing through a pipeline designed to provide a chlorine contact time of six minutes (CT6) at the maximum flow rate. Additionally the water is treated with fluoride and sodium hydroxide. This plant is considered a Class 1 purification plant. Other treatment in the system includes in-line fluoridation, in-line chlorination, and the addition of sodium hydroxide and ortho polyphosphate to inhibit the internal corrosion of water mains and private plumbing. These treatment systems are not considered purification plants. Per the requirements of WAC 246-292, Renton’s water system must be managed by a Water Distribution Manager IV; the Maplewood Treatment Plant must be operated by a Water Treatment Plant Operator III or higher; Wells RW-1, RW-2, and RW-3 must be operated by a Basic Treatment Operator or higher, and the Cross Connection Control Program must be managed by a Cross Connection Control Specialist. The City meets or exceeds all of these requirements. Table 8.1 lists the certifications of the drinking water staff. In-service training consists of special courses and seminars specifically designed for operation and maintenance groups. The training is offered through organizations like the American Water Works Association, Pacific Northwest Section; Evergreen Rule Water December 2012 8-5 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 8/Ch08.docx Association; Washington Environmental Training Center; equipment vendors; local colleges and universities, and trade organizations. Renton supports and promotes operator training. As the complexity of the Renton’s water system increases, the need for trained and efficient staff to keep pace with advances in technology and ever-expanding federal and state regulation will become more important. New employees need utility orientation and basic information and experienced employees need training in regulatory requirements and technological updates. The importance of regular employee training can be strengthened by linking the training with the personnel evaluation program. The personnel evaluation program should be used to provide the employee with a regular and predictable employee promotion plan. A predictable employee promotion plan that is closely linked with an employee-training program can improve employee competency and proficiency. Mandatory certification, as well as the qualifications and training requirements for obtaining and maintaining the certification, is stipulated by the State of Washington. The City Council and City Administration have endorsed the idea of increased and continuous training. Table 8.1 Staff Certification Name Certification Raymond Sled WDM4, WTPO4 (Mandatory Certifications for operation of the Water System) George Stahl WDM3 (Mandatory Certifications for operation of the Water System) Craig Pray WDM3, WTPO3 (Mandatory Certifications for operation of the Water System) Jason Burkey WDM1 Sean Campbell WDM2 Mark Combs WDM1 Ronald Druce WTPO2, WDM3 Greg Durbin WTPO2, WDM3 Joe Ferrer WDS1 Pat Flaherty WDM3, WTPO2 Jayson Gallaway WDM1 Daniel Grant WDM1 Danny Hribal WDM1 Kevin McQuiller WDM1 December 2012 8-6 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 8/Ch08.docx Table 8.1 Staff Certification Name Certification Joshua O’Neill WDM1 Patrick Pierson WDM1 Robert Purdy WDM1 Bob Sagara WDM2 Eric Schwind WDM1 Gary Smith WDS1 Lys Hornsby WDM4, CCS J. D. Wilson WDM 4 Tom Malphrus WDM3, CCS Mike Dotson CCS 8.3 SYSTEM OPERATION 8.3.1 Identification of Major System Components The operation of the major system components is generally described in Chapter 2, Existing System. 8.3.2 Routine System Operation Each major system component has an Operations and Maintenance (O & M) manual that describes start-up and shut-down procedures and safety procedures. Additionally, the Water Maintenance Services Section has written procedures for both electrical and hydraulic lock-out/tag-out of the water system facilities. All sources and booster pump stations are metered and all flow is monitored and recorded by the SCADA system. The flow through the metered connections to the Seattle Public Utilities pipelines at the Fred Nelson Booster Pump Station, Tiffany Park Booster Pump Station and Bow Lake Pipeline is monitored and recorded by SCADA. In addition to the information recorded by SCADA, Water Maintenance Services staff read and record meter readings at all sources and all pump stations, daily if the facility is in operation and twice per week if the facility is on standby. Retail meters at customer connections are read either monthly or bi-monthly. The meter reading routes, sequencing, and cycles are maintained in the City’s Utility Billing System. Meters are read either visually, with touch read wands, or by radio read. Currently the City has United Pipe and Supply, Inc., under contract to install an Automated Meter Reading System (AMR). The first AMR ready radios will replace the existing radios on meter reading December 2012 8-7 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 8/Ch08.docx routes 25 and 31. The first AMR ready radios are scheduled to be installed in October 2011. Initial testing of the AMR system will begin shortly thereafter. The system performance is evaluated in terms of meeting federal and state drinking water quality requirements; maintaining customer satisfaction; controlling the of cost production and delivery of water, and meeting system policy goals for service pressure and fire flow. 8.3.3 Preventive Maintenance Program The preventive maintenance program is documented and tracked by Infor EAM (Enterprise Asset Management). Infor EAM is a computer-based system that is used to schedule preventive maintenance and assign resources where they will do the most good; predict equipment reliability problems and prevent them from happening, and manage assets to best meet the organization’s goals. 8.3.4 Equipment, Supplies, and Chemical Listing Table 8.3 is a listing of vehicles and major equipment assigned to the Water Shop. Inventoried supplies (items stocked on shelves or stored in the yard) are purchased and tracked by the Maintenance Services Division Maintenance Buyer and staff. The Water Maintenance Services Manager and staff provide input to the Maintenance Buyer as to appropriate items and quantities to stock. In addition to stocked items the Maintenance Buyer maintains information on source of supply for chemicals that are delivered directly to the place of use and for parts and equipment items that are not stocked on the shelf or in the yard due to low frequency of purchase or large physical size. The Maintenance Buyer uses the Infor EAM system to purchase items and manage inventories. The Water Maintenance Services Manager maintains information regarding service representatives for major water system components and chemical suppliers. Additionally, the Water System Emergency Response Plan contains lists of contacts for suppliers and support services. Both the Water Maintenance Services Section and the Water Utility Engineering Section maintain copies of the O & M manuals for all of the major components of the drinking water system. These manuals list manufacturer part numbers and descriptions as well as technical specifications for components and chemicals used. 8.4 EMERGENCY RESPONSE PROGRAM The Drinking Water Utility maintains a Water System Emergency Response Plan, which is a sub plan to the City of Renton Emergency Response Plan. 8.4.1 Water System Personnel Emergency Call-up List The Water Maintenance Services Section publishes two emergency call-up lists: one for emergencies dealing with wells and booster pump stations and one for emergencies December 2012 8-8 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 8/Ch08.docx dealing with water mains, PRV stations, and water tanks (reservoirs). The SCADA system is connected to an auto dialer that is used to contact call up personnel when an alarm is triggered after office hours. The auto dialer is programmed to move down a list of phone numbers until its call is acknowledged. After office hours calls to 911 that are water system related are handled by the 911 dispatch who then contacts a cell phone that is carried by on call staff. If the on-call staff does not answer the cell phone the dispatcher will attempt to contact the Water Maintenance Services Manager, the Water Maintenance Services Supervisor or the Water Utility Maintenance Supervisor. Other phone numbers are available to the dispatcher including the Maintenance Services Director’s cell phone number. 8.4.2 Notification Procedures – Water Quality Emergencies See Appendix H, Drinking Water Quality Monitoring Program. 8.4.3 Vulnerability Analysis See Chapter 5, Policies, Criteria, and Standards, for the Water Utility’s reliability and vulnerability policies. The Water Utility completed a security vulnerability assessment in December 2003 and updated the city-wide Emergency Response Plan in June 2004 as required by the Public Health Security and Bioterrorism Preparedness and Response Act of 2002. The Water Utility budgets for security improvements in its Water System Capital Improvement Program. Typically this money is transferred into specific project budgets were security upgrades are incorporated into the overall project scope. Periodically, the Water Utility assesses the vulnerability of its drinking water system to threats from earthquakes, floods, power outages, etc. New facilities are designed and constructed to the latest building code standards. In addition, extra emphasis is placed on hazard engineering when the new facilities are critical to the operation of the water system. Retrofits of existing facilities typically incorporate security and safety upgrades and sometimes structural modifications to enhance survivability and operability of the facility after natural or manmade disasters. The Water Utility designs and constructs redundancy in its water main network, supply sources, pressure zone transfer pumps and PRV stations, etc., to increase the system’s overall reliability and reduce its vulnerability to disruptions. 8.4.4 Contingency Operational Plan Contingency operational plans for the various facilities are included in the, Water System Emergency Response Plan. December 2012 8-9 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 8/Ch08.docx 8.5 SAFETY PROCEDURES The goal of the Water Maintenance Services Section is to comply with all OSHA and WISHA regulations applicable to the operation of the section. All workplace hazards, related safety and first aid equipment and procedures are identified and communicated to the Water Maintenance Services staff via safety briefings, facility specific Standard Operating Procedures, facility Operation and Maintenance Manuals, and/or Material Safety Data Sheets. 8.6 CUSTOMER COMPLAINT RESPONSE PROGRAM Each year the Water Maintenance Services Section receives approximately 3,000 calls of which approximately 300 are complaints. Each call is logged into the Infor EAM system. When applicable, a staff member is assigned to the complaint. Infor EAM tracks the problem; its location; who is assigned to investigate/fix the problem; what was discovered in the field; what was done to address the complaint, and how much time/materials were expended. Complaints are mainly regarding water leaks (80%) and taste and odor problems (20%). 8.7 RECORD KEEPING AND REPORTING Maintenance and operating records are an essential tool in utility management and operation. They also provide the supporting data necessary for long-term planning. The Water Utility keeps several types of records: water quality sampling for operations and mandatory water quality sampling records (see Appendix H); chemical dosing records; water main disinfection records; hydrant flushing records; source production, and booster pump station pumping records; reservoir level records; aquifer level records; personnel records; customer contact records; meter records; inventory records, etc. The City’s records are legible, permanent, accurate, and accessible. Their importance to the efficient functioning of the Utility is effectively addressed in the context of the in-service staff training sessions. Hard copies of the records are maintained at the Water Maintenance Services Manager’s office. The Water Utility Engineering Section maintains information on mandatory water quality sampling test results in a database in the City’s enterprise database management system. The Water Utility Engineering Section also maintains electronic copies (MS Excel files) of the Water Maintenance Services Section’s operational records on one of the City’s network servers. The Water Utility Engineering Section maintains records of backflow assembly test results, tester certifications, test notifications, backflow assembly information and cross connection information in a database in the City’s enterprise database management system. December 2012 8-10 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 8/Ch08.docx The SCADA system (described in Chapter 2) records the flow rates and flow quantities of all wells, booster pumps, and spring; water levels in reservoirs and production wells; levels in chemical storage tanks; pH levels of raw and treated water; pump starts and fails; alarm conditions; and various other data. Current maps of the water system are also important for operation and maintenance. Changes or additions to the water system are added as they occur by the Water Utility Engineering Section and paper and electronic copies are provided to the Water Maintenance Services Section, the Fire Department, Development Services Division, and others. The geospatial and attribute information on the drinking water system is maintained in ESRI ArcGIS (ArcSDE geodatabase in the City’s enterprise database management system). Currently the Water Maintenance Services Section maintains five laptop or tablet PCs which are loaded with the ArcMap. The laptops and tablet PCs are updated periodically with the most current GIS information. The GIS information is viewed using ArcView. The laptops and tablet PCs are used by the utility locators, valve crews, and meter technicians. For users at City Hall, the Water system information is available through an ArcGIS Server, web based application. Paper forms of the maps including valve, hydrant, and fire flow map books at 1” = 400” scale and wall maps at various scales are available upon request. Maps are also available in PDF format. Records are kept in accordance with Revised Code of Washington and Washington Administrative Code requirements. The City’s file maintenance plan outlining specific instructions for keeping and destroying files is maintained and managed by the City Clerk. December 2012 8-11 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 8/Ch08.docx Table 8.2 Operations & Maintenance Activities – Typical Year Activity Work Quantity Work Unit Labor Days Program 01 – Water Distribution / Meters Test / Repair Meter 3”+ 110 Meter 3”+ 27 Replace Meter 1.5”-2” 50 Meter 25 New Meter Accounts 180 Meter 18 Meter Readings 480 Route 360 Meter On / Offs 1,402 Meter 84 Meter Closings 701 Meter 87 Meter Re-reads 420 Meter 8 Replace / Repair Exist Meter 420 Meter 42 Sawdust Meter Boxes 841 Box 14 Lids, Adjust / Clean Boxes 560 Box 11 New Meter Install 220 Meter 27 Fire Meter Services 20 Meter 10 Program 01 Total 713 Program 02 – Water Distribution / Service Service Install 55 Service 110 Contractor Repairs to Service 12 Service 6 Service Repairs 250 Service 137 Check Leaks / None Found 210 Meters 42 Abandon Service 0 Service 0 Transfer Service 30 Service 45 Replace Service 60 Service 140 Program 02 Total 480 Program 03 - Water Distribution/Valves Gate Valve Inspection 2,256 Valve 250 Gate Valve Repair 45 Valve 33 Program 03 Total 283 December 2012 8-12 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 8/Ch08.docx Table 8.2 Operations & Maintenance Activities – Typical Year Activity Work Quantity Work Unit Labor Days Program 04 – Water Distribution – Mains Leak Detection 13,900 Linear Feet 18 Cut-In Tees & Valves 12”+ 6 Cut-In 18 Main Cut & Cap 42 Labor Hour 21 Main Connections 70 Tie-In 210 Locate / Inspect / Repair AirVac 360 Labor Hour 13 Polypig Mainline 0 Linear Feet 0 Main Replacement 1000 Linear Feet 40 Cast Iron Main Repair 8 Repair 24 Steel Main Repair 10 Repair 30 AC Main Repair 5 Repair 12 Disinfect New Mains for Contractors 275 Labor Hour 34 Program 04 Total 420 Program 05 – Water Distribution / Hydrants Hydrant Testing 5,810 Hydrant 134 Hydrant Repair 319 Hydrant 63 Part-Time Hire – Hydrant Painting 581 Hydrant 58 Hydrant Replacement 128 Labor Hour 16 Program 05 Total 271 Program 06 – Water Distribution / Reservoirs Reservoir Maintenance – Internal 196 Labor Hour 24 Reservoir Maintenance – External 90 Labor Hour 11 Part-Time Hire – Ground keeping 1,260 Labor Hour 157 Program 06 Total 192 Program 07 – PRV Stations PRV Station Maintenance 272 Labor Hour 68 Program 07 Total 68 December 2012 8-13 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 8/Ch08.docx Table 8.2 Operations & Maintenance Activities – Typical Year Activity Work Quantity Work Unit Labor Days Program 08 – Chemical Treatment Chemical Treatment Inspection 1600 Labor Hour 300 Chemical Treatment Preventive 160 Labor 20 Chemical Treatment Maintenance 88 Labor Hour 44 Treatment Chemical Handling 800 Labor Hour 100 Program 08 Total 464 Program 09 – Pump Stations Pump Station Preventive Maintenance 494 Labor Hour 123 Pump Station Inspection 1235 Labor Hour 115 Pump Station Painting 252 Labor Hour 3 Pump Station Electric 95 Labor Hour 11 Pump Station Piping 95 Labor Hour 11 Regulatory Compliance 50 Labor Hour 12 Program 09 Total 275 Program 11 – SCADA System SCADA Maintenance 360 Labor Hour 18 Program 11 Total 18 Program 12 – Water Quality Water Testing 1200 Samples 45 Lead & Copper Rule Testing 40 Labor Hour 5 Water Quality Complaint Investigations 90 Complaints 14 Flushing Mains 300 Labor Hour 46 Aquifer Monitoring / Testing 28 Labor Hour 3 Program 12 Total 113 December 2012 8-14 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 8/Ch08.docx Table 8.2 Operations & Maintenance Activities – Typical Year Activity Work Quantity Work Unit Labor Days Program 13 – Miscellaneous Temporary Meters 0 Meter 0 Equipment Service 200 Labor Hour 25 Stores – Yard Work 300 Labor Hour 37 Contractor Construction – Inspection 240 Labor Hour 240 Meter Reader Postings 12 Labor Hour 1 Emergency Response 300 Labor Hour 75 Utility Location 2080 Labor Hour 260 Work – Other Section 192 Labor Hour 24 Program 13 Total 662 Program 90 – Administration Field Supervision 1400 Labor Hour 288 Professional Training 700 Labor Hour 87 Planning & Records 1900 Labor Hour 213 Plan Review 400 Labor Hour 50 Meetings & Conferences 1000 Labor Hour 125 Program 90 Total 763 Program 91 – Leave Time Payroll Adjustments 0 Labor Hour 0 Sick Leave Usage 1200 Labor Hour 150 Absent Time 5600 Labor Hour 700 Program 91 Total 850 Grand Total 5,572 December 2012 8-15 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 8/Ch08.docx Table 8.3 Water Maintenance Services Equipment List 2011 Unit # Equip # Use Vehicle Descr. Year Normal Operator DISTRIBUTION CREW TRUCKS 2085 D93 Water Crew F 550 Diesel 1999 Lead - Bob Sagara 2085 D89 Leaks & Mtr F 550 Diesel 1999 Water Crew 2085 D109 Water Crew F 550 Diesel 2004 Lead: Eric Schwind 2390 B141 Valve Crew Dodge Sprinter 2008 Water Valve Crew 2390 B142 Valve Crew Dodge Sprinter 2008 Water Valve Crew 2010 B101 Utility Locator Blazer LS 4x4 2001 Fred Enriques 2010 B148a Utility Locator Blazer LS 4x4 2008 Mohogany Williams 2034 C257 Call Out Chevy Silverado 2011 Water Crew 2330 B094 Meter Van Chevy Van 2003 Sean Campbell 2080 D069 Flat Bed 1 Ton Flat Bed 1992 Water Crew 2085 D095 Flat Bed 1.5 Ton Flat Bed 1999 Water Crew 2080 D100 Flat Bed 1 Ton Flat Bed 2000 Water Crew LARGE EQUIPMENT 2200 D110 Dirt Hauling 5 yard dump 2007 Water Crew 2220 D116 Dirt Hauling 10 yard dump 2008 Water Crew 3500 E095 Digging Back-hoe 2008 Water Crew 6000 S169 Equipment Trailer Equipment Trailer 1998 Water Crew WATER QUALITY GROUP TRUCKS 2330 B105 Water Quality Astro Van 2002 Greg Durbin 2330 B110 Water Quality Astro Van 2003 Ron Druce 2300 B094 Water Quality 3/4 Ton Van 2001 Kevin Mcquiller 2085 D114 Water Quality 1 Ton Flat Bed 2006 Dan Hrible 2300 C254 Water Quality Silverado Pickup 2008 Robert Purdy 2300 B061 Water Quality Chevy Pickup 2007 Pat Flaherty December 2012 8-16 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 8/Ch08.docx Table 8.3 Water Maintenance Services Equipment List 2011 Unit # Equip # Use Vehicle Descr. Year Normal Operator WATER METER READERS 2000 C224 Meter Reading Small Pickup - Ford 2003 Doug Allen 2000 C218 Meter Reading Small Pickup - Ford 2002 Sandy Hock 2000 C241 Meter Reading Small Pickup - Gmc 2007 MANAGER AND SUPERVISORS 2300 B119 Water Quality Astro Van 2006 Craig Pray 2060 C181 Distribution 3/4 Ton Pickup 4x4 1997 George Stahl 2010 B077 Manager Blazer LS 4x4 2008 Ray Sled December 2012 9-1 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 9/Ch09.docx Chapter 9 CAPITAL IMPROVEMENT PLAN 9.1 INTRODUCTION This chapter summarizes planned and future water system improvement projects and programs that are recommended in other chapters of this Plan and from other feasibility studies for the City of Renton (City). The improvements are needed to correct existing system deficiencies to keep the system running in order to reliably supply the City’s water customers with safe, clean water that meets federal and state drinking water regulatory requirements. The Capital Improvement Plan (CIP) also outlines planned projects that are needed to upgrade and expand the City’s water system to meet future water demand from growth in population and from development within the City of Renton water service area. 9.2 CAPITAL PROJECTS The City has a separate Capital Improvement Plan (CIP) document that prioritizes projects and identifies funding plans for a 6-year period. The CIP document is updated and adopted bi-annually as part of the Council’s adoption of the City’s operating budget. Capital projects are generally categorized into water supply, water quality and treatment, storage facilities, pump stations, water main rehabilitation and replacement, major maintenance, and regulatory compliance programs. The City maintains a current inventory of its water system infrastructure and assets through a Geographic Information System (GIS) based ESRI ArcGIS 11.0. The City is working on the development of a comprehensive Asset Management Program (AMP) to manage the life cycle of all of its water system assets in the most cost effective, sustainable manner to meet established service level goals. The overall water infrastructure capital improvement program will be re-evaluated based on the findings and recommendations of the final Asset Management Plan. 9.2.1 Projects to Address Future Water Supply Needs and Increase Storage Capacity 9.2.1.1 50-Year Water Supply Purveyor Contract with Seattle Public Utilities In 2011, the City of Renton entered into a 50-year (2012-2062) water supply contract with Seattle Public Utilities (SPU) for the purchase of additional water to supplement the City’s own supply sources in order to meet peak day water demands and future water demands from population and development growth within the City’s retail water service area. The wholesale contract with SPU also allows for additional system intertie connections to SPU’s Cedar River Pipelines, Bow Lake Pipeline, and East Side Supply Line, when needed; there is no limit on the quantity of water that the City can purchase from SPU. The City has December 2012 9-2 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 9/Ch09.docx constructed necessary upgrades to its existing interties with SPU, including the installation of flow control valves and meters and connection to the SCADA telemetry system to monitor water purchased from SPU. 9.2.1.2 Future Reservoirs to Increase Storage and for Operational Flexibility The City will be able to meet its future storage requirements by adding new reservoirs and by replacing existing reservoirs as described below. Although, the storage analysis in Chapter 7 shows various estimated deficits in storage in certain pressure zones in future years, the City plans to install larger reservoirs in the future by maximizing their footprints within the current City-owned properties. The larger reservoirs will also provide operational flexibility and added reliability and redundancy of system capacity, in case there is a need for the City to take an existing reservoir out of service for maintenance. Proposed reservoir sizes will be confirmed during pre-design of these projects. The City is also planning to install emergency and back-up power to its remaining well pumps and booster pump stations including automatic transfer switches to reduce the standby storage volume requirements. 9.2.1.2.1 Blackriver Reservoir – Valley 196 Zone This project consists of property acquisition, planning, design, construction of a new reservoir in the 196 pressure-zone to provide additional storage along with operational flexibility and reliability. Although, the storage analysis in Chapter 7 shows an estimated deficit of 1.06 MG in year 2017 and 1.11 MG in year 2031, the City is planning to construct a larger reservoir in the Valley 196 Zone to provide operational flexibility, reliability, and redundancy of system capacity, such as in case there is a need for the City to take the existing N. Talbot Reservoir out of service for maintenance. The total storage requirement for the Valley Operational Area in 2031 is 5.34 MG. Chapter 7 notes that additional storage is needed in this operational area to serve high-elevation properties. The new Blackriver Reservoir will supplement storage provided to this operational area by the North Talbot and Mt. Olivet Reservoirs. The proposed reservoir size will be confirmed during pre-design of this project. In 2011, the City completed a site assessment and geotechnical investigations of a potential site in the Blackriver Quarry. A pre-design report was completed for the proposed 6.6-MG reservoir and related transmission main. The City is currently negotiating with the property owner to acquire the property. The estimated cost range for this project is $8 million to $9 million. 9.2.1.2.2 Replacement of Existing Mt. Olivet Reservoir and Pump Station – 196 Zone This future project consists of the planning, design and construction for the replacement of the existing Mt. Olivet (3-MG) Reservoir and Pump Station, which were constructed in 1954. The City has completed the recoating of the interior and exterior of the tank and has installed a cathodic protection system to extend the useful life of the existing tank. This December 2012 9-3 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 9/Ch09.docx reservoir provides storage to the Valley Operational Area. The total storage requirement for the Valley Operational Area in 2031 is 5.34 MG. Chapter 7 notes that additional storage is needed in this operational area to serve high-elevation properties. The replaced Mt. Olivet Reservoir will supplement storage provided to this operational area by the North Talbot and Blackriver Reservoirs. The proposed reservoir size and pump sizes will be confirmed during pre-design of this project. The City plans to replace the existing reservoir with a new 7-MG tank to increase storage capacity and to provide operational flexibility, reliability, and redundancy of system capacity to both the 196 and 435 Zones. The pump station will be replaced with two (2) 150-HP and two (2) 125-HP pumps, with a total capacity of 9,000 gpm. The estimated cost for the future reservoir and pump station project is $9 million $10 million. 9.2.1.2.3 Replacement of Existing Highlands 435 Reservoirs and Pump Station This project consists of the planning, design and construction for the future replacement of the two existing Highlands 435 Reservoirs (2 MG and 1.5 MG), which were constructed in 1942 and 1960. The project replaces the reservoirs with two larger reservoirs to increase storage capacity and to provide operational flexibility, reliability, and redundancy of system capacity to the 435 zone. The first phase of the project consists of the construction of a new 8 MG reservoir next to the existing 2 old reservoirs. The second phase of the project consists of removing the 2 old reservoirs and to construct a second 7 MG reservoir. The total storage requirement for the Highlands 435 Operational Area in 2031 is 3.27 MG (including the Kennydale 320 Zone). The Highlands 435 Reservoirs provide all the storage for this operational area. The proposed reservoir sizes and pumps sizes will be confirmed during pre-design of this project. The existing reservoirs are structurally vulnerable to a significant earthquake. The first phase of this project consists of the construction of a new 8.0-MG rectangular and underground concrete reservoir on the existing City-owned property. The second phase of this project will include the removal of the two existing reservoirs and their replacement with one new 7-MG rectangular concrete reservoir. The pump station will be replaced with two (2) 150-HP and two (2) 100-HP pumps, with a total capacity of 7,000 gpm. The estimated cost for the two new reservoirs and pump station is $21 million to $22 million. 9.2.1.2.4 Replacement of Existing Highlands 565 Reservoir This project consists of the planning, design and construction of a new 4-MG steel reservoir to replace the existing Highlands 565 Reservoir to increase storage capacity in the 565 Zone and to provide operational reliability and flexibility. The total storage requirement for the Highlands 565 Operational Area in 2031 is 3.44 MG. The replaced Highlands 565 Reservoir will supplement the storage provided to this operational area from the Hazen Reservoir (4.2 MG). The proposed reservoir size and sizing of pumps will be confirmed during pre-design of this project. December 2012 9-4 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 9/Ch09.docx The existing elevated tank was constructed in 1960 and, following the damages to the tank from the 2001 Nisqually earthquake, the City has repaired the bracing on the existing tank and seismically upgraded the tank structure. The estimated cost for this new reservoir project is $8 Million to $9 Million. 9.2.1.2.5 New Rolling Hills 590 Reservoir This project consists of the planning, design and construction of a future 4-MG steel reservoir in the Rolling Hills 590 Zone to increase storage capacity and to provide operational reliability and flexibility. The total storage requirement for the Rolling Hills 590 Operational Area in 2031 is 1.24 MG. The Rolling Hills 590 Reservoir provides all the storage for this operational area; however, some storage is available from pumping from the Rolling Hills 490 Reservoir by pumping through the Rolling Hills BPS. The proposed reservoir size will be confirmed during pre-design of this project. The existing 0.3-MG elevated tank, constructed in 1960, will remain in service. The City has repaired the bracing on the existing tank and seismically upgraded the tank structure following the damages to the tank from the 2001 Nisqually earthquake. The estimated cost for this new reservoir project is $7 Million to $8 Million. 9.2.1.2.6 New Kennydale Reservoir 320-Zone This project consists of property acquisition, planning, design, construction of a new 1.5-MG reservoir in the Kennydale 320 Zone to provide storage along with operational flexibility and reliability. The total storage requirement for the Highlands 435 Operational Area, which includes the Kennydale 320 Zone, in 2031 is 3.27 MG. The Highlands 435 Reservoirs provide all the storage for this operational area. The proposed reservoir size will be confirmed during pre-design of this project. Currently, the 320 Zone is served by several PRVs and the zone does not have a dedicated reservoir. The estimated cost for this new reservoir project is $3 Million to $3.5 Million. 9.2.2 Projects to Increase Water System Reliability and Redundancy 9.2.2.1 Back-Up Power to Pump Stations and Production Wells Pumps The following projects consist of the planning, design and installation of on-site emergency power generators with automatic transfer switches for several pumps stations and well pumps in order to improve system operational reliability. The projects will also provide a reduction in the storage volume requirements for several pressure zones within the water system as allowed under DOH design criteria for sources that have auxiliary power that starts automatically if the primary power is disrupted. Facilities being evaluated for emergency back-up power are listed below. December 2012 9-5 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 9/Ch09.docx 9.2.2.1.1 Maplewood Wells This project consists of the design and installation of backup power supply to the Maplewood wells PW-11, 12, 17, and to the booster pump station and water treatment facility to ensure a reliable source of supply. Auto-start transfer switches will also be installed on these facilities. The estimated cost for this project is $1,000,000. 9.2.2.1.2 West Hill Booster Pump Station This project consists of the design and installation of backup power supply to the two pumps at the West Hills Pump Station. The third pump, which is a fire pump, has a diesel engine generator with auto-start switch. The estimated cost for this project is $250,000. 9.2.2.1.3 Monroe Avenue Booster Pump Station This project consists of the design and installation of backup power supply to the two pumps at the Monroe Avenue booster pump station. This station pumps from the Highlands 435-zone to the Highlands 565-zone. The estimated cost for this project is $300,000. 9.2.2.1.4 South Talbot Hill Booster Pump Station This project consists of the design and installation of backup power supply to the two domestic and the two fire pumps at the South Talbot Hill booster pump station. This station pumps from the Valley 196-zone to the Talbot Hill 350-zone. The estimated cost for this project is $300,000. 9.2.2.1.5 Rolling Hills Booster Pump Station This project consists of the design and installation of backup power supply at the Rolling Hills BPS to allow all four pumps to operate during emergency conditions. The estimated cost for this project is $300,000. 9.2.3 Water Quality Improvements and Regulatory Compliance Projects 9.2.3.1 Primary Disinfection for Wells PW-8, PW-9, EW-3 and Springbrook Springs This project consists of the planning, design and construction of a primary disinfection facility to the City groundwater supply sources PW-8, PW-9, EW-3 and Springbrook Springs in response to the Ground Water Rule. The improvements include the installation of pipelines to provide a minimum chlorine concentration and contact time (CT) value of 6 mg/L-min for the subject groundwater supply sources. In 2003, the City constructed CT-6 piping for three of its production wells: RW-1, RW-2, and RW-3. The estimated cost for this project is $1.2 Million. December 2012 9-6 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 9/Ch09.docx 9.2.3.2 Well 5A Water Treatment Improvements This project consists of the design and construction of a treatment facility for the existing Well 5A in the Kennydale area beyond the next 20-year planning period. The project will increase the City’s usable water supply source by 1,500 gallons per minute (gpm) or about 2.16 million gallons per day (mgd). The City has completed bench-scale water quality testing, a pilot treatment study, and a pre-design report and has identified the treatment method for the removal of iron, manganese, sulfide compounds, and ammonia from the groundwater water supply. The estimated cost for this project is $16.4 million. 9.2.4 Transmission and Distribution Pipelines Renewal and Replacement Projects These projects consist of the planning, design and construction for the systematic replacement or renewal of old transmission mains and of old, undersized and leaky steel, cast-iron, and asbestos-cement distribution mains throughout the City, to restore or increase fire flow capacity and to improve water quality. Prioritization of the pipe replacement program is based on several factors including degree of fire flow deficiency, number of past leaks and breaks found and repaired and likelihood and frequency of future leaks and breaks, predicted residual life of the pipe, number of water quality complaints and results of investigations, and coordination with other scheduled City roadway and utilities improvements projects. The City’s pipeline renewal and replacement program and overall water infrastructure capital improvement program will be re-evaluated based on the findings and recommendations of the final Asset Management Plan. 9.2.4.1 Asset Management Plan for Renewal and Replacement of Water Mains This project consists of a phased development of a Water Utility Asset Management Plan (AMP) in order for the City to better manage the life cycle of its water system assets in the most cost effective, sustainable manner to meet established levels of water service delivery to our customers. The AMP will be structured around the Ten Core Processes introduced and promoted by the USEPA. The first phase of the AMP project will focus on the City’s water distribution pipes which is the largest asset class in the water system. 9.2.4.2 Water Main Replacement Projects to Increase Fire Flow Capacity In order to provide the current minimum fire flow of 1,000 gpm in single-family residential areas, the City plans on replacing the existing and undersized water mains in old residential subdivisions with larger ductile pipes, with an 8-inch minimum diameter. Looping of the mains will be provided, and dead-end mains will be eliminated when possible, to increase flow capacity and to provide system reliability. Old and substandard hydrants will be replaced with new ones, and additional hydrants will be installed to meet current fire codes for the spacing of hydrants. Priority will be given to old 4-inch, 6-inch, and dead-end lines and for pipes located in streets that are planned for reconstruction including asphalt overlays. December 2012 9-7 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 9/Ch09.docx 9.2.4.3 Annual Water Main Replacement Program This program consists of the systematic replacement of old water mains that have reached their anticipated remaining useful life. A summary of the estimated remaining useful life of various types of pipe materials and the ages of the pipes is shown in Chapter 7. This program will be further refined and implemented based on the findings and recommendations of the City’s Asset Management Plan, which is anticipated for completion in 2012-2013. The annual budget for the City’s pipe replacement is $1 million. 9.2.4.4 Optimization of Pressure Zones in Distribution System As part of the hydraulic analysis of the City’s water system described in Chapter 7, deficiencies found in the distribution system will be evaluated and corrected as part of this on-going capital improvement program. For areas where the hydraulic analysis shows that the water pressure in the distribution system exceeds 110 psi under normal system operation, the City will do a study to convert the existing zone to a lower zone, as discussed below. For areas where the hydraulic analysis shows that the water pressure in the distribution system during a fire condition event is less than 30 psi, which is the City’s desired level of service for minimum pressure at the customers’ meters, the City will do a study to convert the existing zone to a higher zone, as discussed below. Figures 7.12 through 7.26 in Chapter 7 show potential improvements, such as locations of new PRVs, closed valves, or extending pump discharge piping to higher elevations. For each of these areas, it is recommended that the City perform a Rezone Study to determine how to best redistribute operating pressures and confirm the required system modifications. The following Rezone Studies are recommended:  Kennydale 320/ Highlands 435 Rezone Study.  Rolling Hills Rezone Study.  Talbot Hill 350 Rezone Study.  West Hills Rezone Study. The estimated cost of this program will be developed as part of the evaluation and study for each project. The line item “Pressure and Flow Optimization Study” in Table 9.1 is the first step in identifying solutions to system pressure (high and low) and fire flow issues. At the completion of the study, the CIP will be updated to include projects to address system and fire flow issues. December 2012 9-8 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 9/Ch09.docx 9.2.4.5 Water Main Replacement in conjunction with Roadway Improvements Projects This program consists of the replacement of existing water mains in conjunction with the construction of major roadways and utilities improvement projects to reduce the cost of future replacement of the lines and to minimize construction impact to traffic, businesses, and neighborhoods within the various project areas. 9.2.4.6 Rainier Avenue S. from S. Grady Way to S. 2nd St This project consists of the replacement of existing water mains in Rainier Avenue from SW Grady Way to S 2nd Street, in conjunction with the City’s Transportation Department’s roadway improvements project. The new 12-inch water mains will improve the fire flow capacity for the existing commercial businesses and for future development and redevelopment projects within the Rainer Avenue corridor. The estimated cost for this project is $1.5 Million. 9.2.4.7 SW 27th St - Strander Boulevard Water Main Extension This project consists of the extension of a 12-inch water main in Strander Blvd west of Naches Ave SW in conjunction with the City’s transportation roadway improvements project. The new water main will provide water service to the abutting private commercial properties owned by the Boeing Company. The estimated cost for this project is $130,000. 9.2.4.8 Water Main Improvements in Redevelopment Areas Redevelopment activities can have a substantial impact on the ability of the existing distribution system to provide sufficient water to customers for fire protection service and for domestic uses. Typically, detailed hydraulic models are used in conjunction with area water demand forecasts and fire flow requirements to identify potential water main improvements in redevelopment areas. Water main improvements needed for redevelopment projects are typically installed and paid for by the developers. The developers may recoup some of their costs from future benefitting properties by applying to City Council for a latecomer agreement. In some cases, with the approval of funding from the City Council, the City may install the improvements or participate in the cost of the improvements with the developers and the City recovers its costs from benefitting properties through a Special Assessment District. The pipe replacement program for redevelopment projects is designed to balance the City’s investments in pipe replacement projects to reduce risks associated with aging pipe infrastructure with investments in major pipe replacement projects to support growth and development. December 2012 9-9 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 9/Ch09.docx 9.2.4.9 Other On-Going Capital Programs and Plans 9.2.4.9.1 Reservoirs Recoat This project consists of a scheduled recoating of the interior and exterior surfaces of the existing steel stand pipe and elevated reservoirs to extend the useful life of the structures. The installation of safety upgrades and of a cathodic protection system is included in this project. The budget for this program is $100,000 per year. 9.2.4.9.2 Telemetry System and SCADA Upgrades This project consist of the systematic replacement of the remote telemetry units (RTU’s) at various City water facilities due to the unavailability of replacement parts and also to be prepared should the manufacturers of the original system go out of business. The project also includes the design, reconfiguration, programming and functional testing of the master telemetry unit (MTU) and the of the human machine interface (HMI) at the City’s operation and maintenance headquarters. It is anticipated that the updating of the telemetry system will occur on a five-year cycle. The estimated cost for this project is $50,000 per year. 9.2.4.9.3 Security Improvements This project consists of the planning, design and installation of security improvements on existing water system facilities based on the findings and recommendations of the security vulnerability assessment. The cost of this program depends on each specific project. 9.2.4.9.4 Upgrades to Monitoring Wells The City owns 53 monitoring wells located throughout its well fields and surrounding areas. The City uses the monitoring wells for water quality testing to detect contaminants before they reach the production wells and also to monitor water levels for the management of the pumping of the aquifer. This project consists of performing an inventory and assessment of the conditions existing monitoring wells and to perform necessary repairs, including installation of water level sensors connected to the City’s telemetry system, purge pumps, and vandal protection measures. The estimated cost for this project is $130,000. 9.3 SUMMARY Tables 9.1 and 9.2 summarize the short-term and long-term CIP, including project names, estimated costs, and projected years for start and completion. December 2012 9-10 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 9/Ch09.docx December 2012 9-11 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 9/Ch09.docx December 2012 10-1 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 10/Ch10.doc Chapter 10 FINANCIAL PROGRAM 10.1 INTRODUCTION This chapter summarizes the City of Renton’s (City’s) Water Utility financial status and its funding strategy for recommended investments on the Capital Improvement Program for the 10-year planning period through 2020. The Water Utility operates as an enterprise fund and as such, it must be self-sustaining. Water utility funds are accounted for and budgeted separately, but are managed as a system with other City enterprise funds in accordance with the City’s financial management policies. These polices are described in more detail in Chapter 5, and include the following:  Fiscal Stewardship.  Self-sufficient Funding.  Rate Stabilization.  Operating Reserve.  Debt Service.  Bonds vs. Cash Expenditures.  Comprehensive Planning.  Equitable Rates. 10.2 REVENUES AND FUNDING SOURCES The City accounts for its water revenues and other funding sources in two main separate funds:  Fund 405 – Fund 405 is the Operating Fund for the City’s water utility. It was created in 2006 for the purpose of identifying water utility revenues and expenses. Revenue sources for this fund are generally from water sales and collections, but also include revenues from plan review and inspection fees, water meter installation fees, utility billing fees, rent and leases, and inter-fund reimbursements from other City’s departments for services provided. Expenses include Operation and Maintenance (O&M), debt service payments for Public Works Trust Fund (PWTF) loans, revenue bonds, taxes, and transfers to the Construction Fund.  Fund 425 – Fund 425 is the Construction Fund for the Water Utility for the design, construction, and project management of capital improvement projects. Revenues from this fund include transfers from the Operating Fund, utility collection fees, special assessment fees, system development charges, water connection charges, City December 2012 10-2 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 10/Ch10.doc issued bonds, proceeds from revenue bonds, proceeds from PWTF loans, and from Community, Trade, and Economic Development grants. The Finance Department maintains the financial records for the Water Utility and both the Finance Department and the Public Works Department monitor and evaluate the Utility’s fiscal performance. 10.3 HISTORICAL FINANCIAL PERFORMANCE Table 10.1 summarizes actual cash-basis revenues, expenses, and fund balances for the Water Utility Operating Fund 405 for the 5-year period 2006-2010. Over this 5-year period, the Utility fund balance, which represents total unexpended resources carried forward to future years, increased from $3.9 million to $4.7 million. A total of $13.8 million was transferred over the period to the Utility Capital Improvement Fund to finance budgeted capital project expenses. These transfers represent 24 percent of total water utility expenses and 30 percent of the water service collection revenues for the 5-year period. As of December 31, 2010, included in the ending fund balance are the Operating Fund reserves of $725,242 and Debt Reserves of $1,955,020, per the City’s financial policies. Table 10.1 Water Utility Fund (Fund 405) Actual Revenues, Expenses & Fund Balances by Year 2006 2007 2008 2009 2010 Beginning Fund Balance $516,000 $4,071,000 $3,298,000 $5,104,000 $4,295,000 Annual Revenues Water Service2 $7,225,000 $9,596,000 $9,442,000 $10,217,000 $10,507,000 Water Fees3 $353,000 $504,000 $257,000 $132,000 $124,000 Investment Interest $142,000 $172,000 $315,000 $262,000 $79,000 Interfund Revenue4 $213,000 $212,000 $211,000 $240,000 $233,000 Other Revenue5 $206,000 $145,000 $150,000 $180,000 $168,000 Bond Proceeds $3,240,000 $707,000 $7,719,000 - - Revenue Totals $11,378,000 $11,336,000 $18,094,000 $11,032,000 $11,111,000 December 2012 10-3 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 10/Ch10.doc Table 10.1 Water Utility Fund (Fund 405) Actual Revenues, Expenses & Fund Balances by Year 2006 2007 2008 2009 2010 Annual Expenditures Administration $288,000 $287,000 $352,000 $335,000 $414,000 Operations $1,467,000 $1,182,000 $1,252,000 $1,167,000 $1,090,000 Maintenance $3,412,000 $3,874,000 $4,220,000 $4,354,000 $4,323,000 Purchased Water & Water Inventory6 $221,000 $325,000 $193,00 $168,000 $217,000 Debt Services Costs7 $411,000 $2,164,000 $2,573,000 $2,538,000 $2,325,000 Taxes $865,000 $973,000 $1,038,000 $1,039,000 $1,097,000 Transfers Out to Capital Fund8 $1,233,000 $2,460,000 $6,662,000 $2,240,000 $1,245,000 Expenditure Totals $7,897,000 $11,264,000 $16,289,000 $11,841,000 $10,710,000 Ending Fund Balance $3,997,000 $4,142,000 $5,104,000 $4,295,000 $4,695,000 Bond Reserves $1,899,000 $1,955,000 $1,955,000 $1,955,000 $1,955,000 Capital Outlay (Fund 425) $2,100,000 $4,447,000 $6,235,000 $1,737,000 $2,259,000 Notes: 1. Source: City-provided Statement of Revenues, Expenses & Fund Balances for Fund 405. 2. Water Sales Service revenue includes rate revenue plus interest on notes from Skyway Water District. 3. Water Fees revenue includes Inspection Fees, Installation Fees, Utility Billing Fees, and other Miscellaneous Fees. 4. Interfund Revenue includes soft-capital transfers for labor & benefits for City employees working on the Water Capital Improvement Program (CIP) and Project Reimbursements from other funds. Other minor amounts are also transferred from Street Maintenance, Wastewater Maintenance, and Surface Water Maintenance. 5. Other Revenue primarily includes rental fees paid by communications companies for leasing antenna spaces in reservoir sites. 6. Includes both Wholesale Water Purchases and Water Inventory purchases - pipes, asphalt, and other materials needed for maintenance work. 7. Includes debt payments for PWTF Loans and Bonds. 8. Transfer to Capital Improvement Projects Fund (Fund 425) for annual CIP expenditures. 2009 also includes a $240,000 transfer to the Airport for a 5-year Interfund Loan. 10.4 FINANCIAL OUTLOOK Table 10-2 presents a projection of annual utility revenues, expenses, and fund balances for the next 10 years (2011-2020), based on the 2010 adopted budget amounts and changes expected to occur in various categories over the subsequent 10-year period as a result of new customers, general inflation, and other related factors. This type of forecast is December 2012 10-4 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 10/Ch10.doc routinely used by utility staff to develop rate adjustment proposals and to assess the impact of changing budget assumptions on future rate requirements. Some key assumptions used to forecast future annual revenues and expenses that appear in Table 10.2 include: 1. Growth in total water utility customers/water consumption levels will equal 0.3 percent per year for the years 2011 through 2012, 0.4 percent per year for the years 2013 through 2015, and 0.5 percent for the years 2016 through 2020. 2. Wholesale water sales to Skyway Water & Sewer District are not anticipated to increase, since Skyway obtains most of its water through a water supply contract with Cascade Water Alliance and through its independent sources. 3. Interest and other revenue sources are anticipated to grow by 2 percent per year for the years 2011 through 2012, 3 percent per year for the years 2013 through 2015, and 4.52 percent per year for the years 2016 through 2020. 4. Personnel costs are expected to increase annually by 7.5 percent for the years 2011 through 2012, and by 10 percent for the years 2013 through 2020, based on historical trends and projected benefit cost increases. 5. Other annual maintenance and operations expenses are anticipated to increase 2.5 percent in 2011, 3 percent in 2012, 3.5 percent in 2013, and 4 percent for the years 2014 through 2020, based on historical trends and projected increases in the Seattle Consumer Price Index (CPI-U). 6. Capital Improvement construction costs are expected to increase annually by 3 percent to 4 percent over the 10-year period. 7. Annual debt service expenses will equal scheduled payments for current outstanding revenue bond issues. 8. Water rate increases are projected for each year to cover the impact of cost of local program operations, to fund outside water purchases, and to contribute to construction projects in lieu of issuing new bonds. However, bonding is anticipated for the years 2016 through 2020 to support the construction of new reservoirs. December 2012 10-5 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 10/Ch10.doc Ta b l e 1 0 . 2 W a t e r U t i l i t y F u n d ( F u n d 4 0 5 ) F o r e c a s t e d R e v e n u e s , E x p e n s e s & F u n d B a l a n c e s b y Y e a r 20 1 1 2 0 1 2 2 0 1 3 2 0 1 4 2 0 1 5 2 0 1 6 2 0 1 7 2 0 1 8 2 0 1 9 2 0 2 0 Be g i n n i n g F u n d Ba l a n c e $4 , 6 9 5 , 0 0 0 $ 3 , 8 5 4 , 0 0 0 $ 4 , 2 9 9 , 0 0 0 $ 5 , 01 7 , 0 0 0 $ 5 , 7 0 6 , 0 0 0 $ 6 , 2 2 9 , 0 0 0 $ 1 1 , 6 1 6 , 00 0 $ 1 8 , 0 8 5 , 0 0 0 $ 2 5 , 4 3 6 , 0 0 0 $ 3 4 , 0 1 5 , 0 0 0 An n u a l R e v e n u e s Wa t e r S e r v i c e 2 $1 3 , 3 3 8 , 0 0 0 $ 1 5 , 4 9 5 , 0 0 0 $ 1 6 , 4 4 2 , 0 0 0 $1 7 , 4 9 2 , 0 0 0 $ 1 8 , 6 0 9 , 0 0 0 $ 2 0 , 1 9 0 , 0 0 0 $ 2 1 , 9 0 5 , 00 0 $ 2 3 , 7 6 7 , 0 0 0 $ 2 5 , 7 8 8 , 0 0 0 $ 2 7 , 9 8 2 , 0 0 0 Wa t e r F e e s 3 $1 8 5 , 0 0 0 $ 1 8 6 , 0 0 0 $ 1 8 6 , 0 0 0 $ 1 8 7 , 0 0 0 $ 1 8 8 , 0 0 0 $1 8 9 , 0 0 0 $ 1 9 0 , 0 0 0 $ 1 9 1 , 0 0 0 $ 1 9 2 , 0 0 0 $ 1 9 3 , 0 0 0 In v e s t m e n t In t e r e s t $1 2 7 , 0 0 0 $ 6 6 , 0 0 0 $ 9 1 , 0 0 0 $ 1 1 1 , 0 0 0 $ 1 3 1 , 0 0 0 $1 9 6 , 0 0 0 $ 3 6 6 , 0 0 0 $ 5 5 6 , 0 0 0 $ 7 7 3 , 0 0 0 $ 1 , 0 4 1 , 0 0 0 In t e r f u n d Re v e n u e 4 $2 7 0 , 0 0 0 $ 2 7 5 , 0 0 0 $ 2 8 7 , 0 0 0 $ 2 9 4 , 0 0 0 $ 2 4 8 , 0 0 0 25 5 , 0 0 0 $ 2 6 2 , 0 0 0 $ 2 6 9 , 0 0 0 $ 2 7 7 , 0 0 0 $ 2 8 5 , 0 0 0 Ot h e r R e v e n u e 5 $1 2 6 , 0 0 0 $ 1 3 0 , 0 0 0 $ 1 3 6 , 0 0 0 $ 1 4 1 , 0 0 0 $ 1 4 7 , 0 0 0 $1 5 2 , 0 0 0 $ 1 5 8 , 0 0 0 $ 1 6 5 , 0 0 0 $ 1 7 1 , 0 0 0 $ 1 7 8 , 0 0 0 Bo n d P r o c e e d s - - - - - $ 2 , 4 2 1 , 0 0 0 $ 2 , 5 1 8 , 0 0 0 $2 , 8 2 0 , 0 0 0 $ 2 , 9 3 3 , 0 0 0 $ 3 , 4 8 6 , 0 0 0 Re v e n u e T o t a l s $1 4 , 0 4 6 , 0 0 0 $ 1 6 , 1 5 1 , 0 0 0 $ 1 7 , 1 4 3 , 0 0 0 $ 1 8 , 22 5 , 0 0 0 $ 1 9 , 3 2 3 , 0 0 0 $ 2 3 , 4 0 3 , 0 0 0 $ 2 5 , 4 0 0 , 00 0 $ 2 7 , 7 6 8 , 0 0 0 $ 3 0 , 1 3 4 , 0 0 0 $ 3 3 , 1 6 5 , 0 0 0 An n u a l E x p e n d i t u r e s Ad m i n i s t r a t i o n $3 1 1 , 0 0 0 $ 3 2 1 , 0 0 0 $ 3 3 1 , 0 0 0 $ 3 4 5 , 0 0 0 $ 3 5 9 , 0 0 0 $3 7 4 , 0 0 0 $ 3 8 9 , 0 0 0 $ 4 0 6 , 0 0 0 $ 4 2 3 , 0 0 0 $ 4 4 1 , 0 0 0 Op e r a t i o n s $8 6 8 , 0 0 0 $ 6 3 5 , 0 0 0 $ 1 , 1 9 8 , 0 0 0 $ 1 , 2 4 6 , 00 0 $ 1 , 2 9 7 , 0 0 0 $ 1 , 3 4 9 , 0 0 0 $ 1 , 4 0 5 , 0 0 0 $1 , 4 6 2 , 0 0 0 $ 1 , 5 2 2 , 0 0 0 $ 1 , 5 8 6 , 0 0 0 Ma i n t e n a n c e $4 , 7 7 1 , 0 0 0 $ 4 , 9 1 3 , 0 0 0 $ 5 , 1 3 2 , 0 0 0 $ 5 , 32 4 , 0 0 0 $ 5 , 5 2 5 , 0 0 0 $ 5 , 7 3 6 , 0 0 0 $ 5 , 9 5 7 , 00 0 $ 6 , 1 8 9 , 0 0 0 $ 6 , 4 3 2 , 0 0 0 $ 6 , 6 8 6 , 0 0 0 Pu r c h a s e d W a t e r & W a t e r In v e n t o r y 6 $3 6 7 , 0 0 0 $ 3 0 7 , 0 0 0 $ 3 1 5 , 0 0 0 3 2 4 , 0 0 0 $ 3 3 4 , 0 0 0 $3 4 4 , 0 0 0 $ 3 5 5 , 0 0 0 $ 3 6 5 , 0 0 0 $ 3 7 7 , 0 0 0 $ 3 8 9 , 0 0 0 De b t S e r v i c e s Co s t s 7 $2 , 4 8 0 , 0 0 0 $ 2 , 4 8 2 , 0 0 0 $ 1 , 5 5 6 , 0 0 0 $ 1 , 98 3 , 0 0 0 $ 1 , 9 8 0 , 0 0 0 $ 2 , 2 1 6 , 0 0 0 $ 2 , 4 5 9 , 00 0 $ 2 , 6 9 0 , 0 0 0 $ 2 , 9 7 4 , 0 0 0 $ 3 , 3 0 8 , 0 0 0 Ta x e s $1 , 7 2 4 , 0 0 0 $ 2 , 0 0 5 , 0 0 0 $ 2 , 1 3 4 , 0 0 0 $ 2 , 27 0 , 0 0 0 $ 2 , 4 1 5 , 0 0 0 $ 2 , 6 2 1 , 0 0 0 $ 2 , 8 4 4 , 00 0 $ 3 , 0 8 6 , 0 0 0 $ 3 , 3 4 8 , 0 0 0 $ 3 , 6 3 3 , 0 0 0 Tr a n s f e r s O u t t o Ca p i t a l F u n d 8 $4 , 3 6 5 , 0 0 0 $ 5 , 0 4 5 , 0 0 0 $ 5 , 7 6 0 , 0 0 0 $ 6 , 04 4 , 0 0 0 $ 6 , 8 9 0 , 0 0 0 $ 5 , 3 7 5 , 0 0 0 $ 5 , 5 2 1 , 00 0 $ 6 , 2 1 9 , 0 0 0 $ 6 , 4 8 0 , 0 0 0 $ 7 , 7 6 9 , 0 0 0 Ex p e n d i t u r e To t a l s $1 4 , 8 8 6 , 0 0 0 $ 1 5 , 7 0 7 , 0 0 0 1 6 , 4 2 5 , 0 0 0 $ 1 7 , 53 6 , 0 0 0 $ 1 8 , 8 0 0 , 0 0 0 $ 1 8 , 0 1 6 , 0 0 0 $ 1 8 , 9 3 0 , 00 0 $ 2 0 , 4 1 7 , 0 0 0 $ 2 1 , 5 5 6 , 0 0 0 $ 2 3 , 8 1 1 , 0 0 0 En d i n g F u n d Ba l a n c e $3 , 8 5 4 , 0 0 0 $ 4 , 2 9 9 , 0 0 0 $ 5 , 0 1 7 , 0 0 0 $ 5 , 70 6 , 0 0 0 $ 6 , 2 2 9 , 0 0 0 $ 1 1 , 6 1 6 , 0 0 0 $ 1 8 , 0 8 5 , 00 0 $ 2 5 , 4 3 6 , 0 0 0 $ 3 4 , 0 1 5 , 0 0 0 $ 4 3 , 3 6 8 , 0 0 0 December 2012 10-6 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 10/Ch10.doc Ta b l e 1 0 . 2 W a t e r U t i l i t y F u n d ( F u n d 4 0 5 ) F o r e c a s t e d R e v e n u e s , E x p e n s e s & F u n d B a l a n c e s b y Y e a r 20 1 1 2 0 1 2 2 0 1 3 2 0 1 4 2 0 1 5 2 0 1 6 2 0 1 7 2 0 1 8 2 0 1 9 2 0 2 0 Bo n d R e s e r v e s $1 , 9 5 5 , 0 0 0 $ 1 , 6 5 3 , 0 0 0 $ 1 , 5 7 5 , 0 0 0 $ 1 , 57 5 , 0 0 0 $ 1 , 5 7 5 , 0 0 0 $ 1 , 8 1 2 , 0 0 0 $ 2 , 0 5 7 , 00 0 $ 2 , 3 3 3 , 0 0 0 $ 2 , 6 1 9 , 0 0 0 $ 2 , 9 6 0 , 0 0 0 Ca p i t a l O u t l a y (F u n d 4 2 5 ) $6 , 6 0 1 , 0 0 0 $ 5 , 6 2 7 , 0 0 0 $ 5 , 9 6 3 , 0 0 0 $ 6 , 31 4 , 0 0 0 $ 7 , 1 6 4 , 0 0 0 $ 8 , 0 7 1 , 0 0 0 $ 8 , 3 9 4 , 00 0 $ 9 , 4 0 1 , 0 0 0 $ 9 , 7 7 7 , 0 0 0 $ 1 1 , 6 2 1 , 0 0 0 No t e s : 1. So u r c e : W a t e r U t i l i t y R a t e M o d e l . 2. Wa t e r S a l e s S e r v i c e r e v e n u e i n c l u d e s r a t e r e v e n u e p l u s i n t e r e s t o n n o t e s f r o m S k y w a y W a t e r D i s t r i c t ( 2 0 1 1 & 2 0 1 2 o n l y ) . 3. Wa t e r F e e s r e v e n u e i n c l u d e s I n s p e c t i o n F e e s , I n s t a l l a t i o n F e e s , U t i l i t y B i l l i n g F e e s , a n d o t h e r M i s c e l l a n e o u s F e e s . 4. In t e r f u n d R e v e n u e i n c l u d e s s o f t - c a p i t a l t r a n s f e r s f o r l a b o r & b e n e f i t s f o r C i t y e m p l o y e e s w o r k i n g o n t h e W a t e r C a p i t a l I m p r o v e m ent Program (CIP) an d P r o j e c t R e i m b u r s e m e n t s f r o m o t h e r f u n d s . O t h e r m i n o r a m o u n t s a r e a l s o t r a n s f e r r e d f r o m S t r e e t M a i n t e n a n c e , W a s t e w a t e r M a i n t enance, and Su r f a c e W a t e r M a i n t e n a n c e . 5. Ot h e r R e v e n u e p r i m a r i l y i n c l u d e s r e n t a l f e e s p a i d b y c o m m u n i c a t i on s c o m p a n i e s f o r l e a s i n g a n t e n n a s p a c e s i n r e s e r v o i r s i t e s . 6. In c l u d e s b o t h W h o l e s a l e W a t e r P u r c h a s e s a n d W a t e r I n v e n t o r y p u r c h a s e s - p i p e s , a s p h a l t , a n d o t h e r m a t e r i a l s n e e d e d f o r m a i n t e n a nce work. 7. In c l u d e s d e b t p a y m e n t s f o r P W T F L o a n s a n d B o n d s . 8. Tr a n s f e r t o C a p i t a l I m p r o v e m e n t P r o j e c t s F u n d ( F u n d 4 2 5 ) f o r a n n u a l C I P e x p e n d i t u r e s . December 2012 10-7 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 10/Ch10.doc 10.5 FUNDING FOR COMPREHENSIVE PLAN CAPITAL IMPROVEMENTS RECOMMENDATIONS The descriptions and planning-level cost estimates for the City’s six-year (2011-2016) water system Capital Improvement Program (CIP), are shown in Chapter 9 of the Plan. Transfers to the capital improvement fund included in Table 10-2 represent anticipated funding needs for projects in the current (2011-2016) CIP. These funds will be updated to reflect the recommendations cited in this plan for future budget and rate projections. Other potential sources of funding for these recommendations include re-allocating funds from other lower-priority projects identified in the CIP, obtaining low-interest PWTF loans for projects meeting eligibility requirements, adopting additional water service rate increases, or using ending fund balances. 10.6 WATER RATES In 2008, the City implemented a three-tiered inverted block rate structure for single-family residences and duplexes which promotes water conservation. In 2012, City Council approved a 16 percent rate increase. The City periodically conducts cost of service analyses and rate studies. The current (2012) rate structure is summarized in Table 10.3. Table 10.3 2012 City of Renton Water Commodity Rate Schedule Customer Rate Single-Family Residences and Duplexes Less than 500 cf/month $2.30/ccf 500 to 1,000 cf/month $3.09/ccf Over 1,000 cf/month $3.90/ccf Multi-Family $2.98/ccf Non-Residential $3.16/ccf Private Irrigation $5.06/ccf The City also charges a monthly base fee for all meters, depending on the size of meters as show in Table 10.4. December 2012 10-8 pw://Carollo/Documents/Client/WA/Renton/8595A00/Deliverables/Chapter 10/Ch10.doc Table 10.4 2012 City of Renton Monthly Water Base Charge Rate Schedule Meter Size Domestic Irrigation Fire Protection ¾" $15.96 $9.60 - 1" $33.06 $17.16 $5.69 1 ½" $61.07 $29.29 $6.36 2" $95.71 $44.86 $8.17 3" $196.65 $94.94 $21.58 4" $300.00 $141.18 $26.55 6" $585.24 $267.40 $38.15 8" $1,145.52 $585.15 $51.38 10" $1,707.60 $752.43 $66.29 12" $2,485.13 $1,086.53 -