City of Aberdeen Water System Plan DRAFT November 2020 Prepared By: HDR Engineering, Inc. 606 Columbia Street NW, Suite 200 Olympia, WA 98501 (360) 570-4400 November 2020 Contents 1. Description of Water System .................................................................................... 1-1 1.1 Ownership and Management ......................................................................... 1-1 1.2 System Background and History..................................................................... 1-1 1.3 Service Area .................................................................................................. 1-2 1.3.1 General .............................................................................................. 1-2 1.3.2 Service Area Policies and Duty to Serve ............................................. 1-2 1.3.3 Retail Service Area ............................................................................. 1-3 1.3.4 Future Service Area ............................................................................ 1-3 1.4 Adjacent Purveyors ........................................................................................ 1-4 1.5 Inventory of Existing Facilities ........................................................................ 1-6 1.5.1 Transmission System.......................................................................... 1-6 1.5.2 Treatment Facilities ............................................................................ 1-6 1.5.3 Finished Water Storage Facilities ...................................................... 1-12 1.5.4 Pumping Stations ............................................................................. 1-14 1.5.5 Distribution System ........................................................................... 1-16 1.5.6 Pressure Zones ................................................................................ 1-16 1.5.7 Interties ............................................................................................ 1-18 1.5.8 Industrial Water System .................................................................... 1-19 2. Related Plans and Agreements................................................................................. 2-1 2.1 Related Plans ................................................................................................ 2-1 2.2 Service Area Agreements .............................................................................. 2-1 2.3 Zoning ........................................................................................................... 2-1 3. Water Demand Forecast............................................................................................ 3-1 3.1 Water Production ........................................................................................... 3-1 3.1.1 Average Day Demand and Maximum Day Demand ............................. 3-2 3.2 Customer Categories, Connections, and Consumption ................................... 3-3 3.3 Water Use Factors and Equivalent Residential Units....................................... 3-7 3.4 Water Balance and Distribution System Leakage............................................ 3-8 3.5 Wholesale Customers .................................................................................. 3-10 3.5.1 City of Cosmopolis............................................................................ 3-10 3.5.2 Stafford Creek Correctional Center ................................................... 3-10 3.6 Water Demand Forecast .............................................................................. 3-11 3.6.1 Conservation Adjustment..................................................................... 3-13 City o f Aberdeen Contents 2020 Water System Plan DRAFT ii November 2020 4. Water Use Efficiency .................................................................................................. 4-1 4.1 Water Use Efficiency Requirements and Compliance Summary ...................... 4-1 4.2 Conservation Goals ....................................................................................... 4-2 4.3 Existing Conservation Program ...................................................................... 4-2 4.4 Conservation Effectiveness Evaluation ........................................................... 4-3 4.5 Future Conservation Program ........................................................................ 4-3 4.6 Water Loss Control Action Plan ...................................................................... 4-3 5. Water Rights and Source Reliability ........................................................................ 5-1 5.1 Watershed Control Program ........................................................................... 5-1 5.2 Diversion Facility............................................................................................ 5-2 5.3 Water Rights .................................................................................................. 5-2 5.3.1 Existing Water Rights.......................................................................... 5-2 5.3.2 Water Rights Evaluation...................................................................... 5-4 5.4 Reclaimed Water ........................................................................................... 5-6 6. Water Quality ............................................................................................................. 6-1 6.1 System Overview and Water Quality Compliance Responsibility ..................... 6-1 6.2 Drinking Water Regulatory Framework ........................................................... 6-1 6.3 Overview of Drinking Water Regulations and Aberdeen’s Compliance............. 6-3 6.3.1 Treatment Regulations........................................................................ 6-3 6.3.2 Finished Water Regulations ................................................................ 6-6 6.3.3 Distribution System Regulations.......................................................... 6-9 6.3.4 Consumer Confidence and Public Notification Rules ......................... 6-15 6.3.5 Recently Promulgated and Anticipated Drinking Water Regulations ... 6-16 6.4 Labs Used for Sample Analyses................................................................... 6-18 6.5 Response to Customer Inquiries and Complaints.......................................... 6-18 6.6 Summary of Regulatory Status and Monitoring Requirements ....................... 6-19 7. System Analysis ......................................................................................................... 7-1 7.1 Source Capacity Analysis............................................................................... 7-1 7.1.1 Design Criteria.................................................................................... 7-1 7.1.2 Source Capacity Evaluation ................................................................ 7-1 7.2 Storage Capacity Analysis.............................................................................. 7-6 7.2.1 Design Criteria.................................................................................... 7-6 7.2.2 Storage Capacity Evaluation ............................................................... 7-8 7.3 Distribution System Analysis ........................................................................ 7-13 7.3.1 Analysis Methodology ....................................................................... 7-13 7.3.2 System Components ........................................................................ 7-14 7.3.3 Water Demand Allocation ................................................................. 7-14 7.3.4 Calibration ........................................................................................ 7-14 7.3.5 Modeling Scenarios .......................................................................... 7-18 City o f Aberdeen Contents 2020 Water System Plan DRAFT iii November 2020 7.3.6 Peak Hour Analysis Results .............................................................. 7-18 7.3.7 Fire Flow Analysis Results ................................................................ 7-23 8. Operations and Maintenance .................................................................................... 8-1 8.1 Organizational Structure................................................................................. 8-1 8.2 Personnel Certif ication ................................................................................... 8-1 8.3 Routine Operations ........................................................................................ 8-2 8.3.1 General .............................................................................................. 8-2 8.3.2 Source of Supply ................................................................................ 8-2 8.3.3 Treatment Operations ......................................................................... 8-2 8.3.4 Finished Water Storage ...................................................................... 8-4 8.3.5 Booster Facilities ................................................................................ 8-4 8.3.6 Service Meters ................................................................................... 8-4 8.4 Emergency Response Plan ............................................................................ 8-4 8.4.1 Vulnerability Overview ........................................................................ 8-4 8.4.2 Emergency Notification