Our Water System Plan

All water systems in the State of Washington are required to complete a Comprehensive Water System Plan Update every 10 years. (formerly every 6 years).

The purpose of this document is to identify the necessary planning and engineering efforts to describe and analyze system competency for the projected future demands on the water system, by compiling the following information:

  • Planning and engineering efforts that describe and analyze system competency for the projected future demands on the water system;
  • A detailed capital improvement plan that addresses system deficiencies through the 10-year and 20-year planning cycles; and
  • A review of the existing water system, design criteria, system analysis and operations programs.

Our Current Water System Plan

Click on the following link to view and/or download a brief overview of our most recent Comprehensive Water System Plan (filed as Shoreline Water District, prior to our name change in January 2014):

We are currently in the process of updating this plan, and should have it available in mid-2019.

Components of Our Water System Plan

1. Overview
Purpose; Policies; Rules and Regulations; Conservation; Customer Service; and long term water supply contract with Seattle Public Utilities (SPU).

2. Basic Planning Data
Historical data; Topography; Land Use and Zoning; Population and Employment; System Demand Projections.

3. Existing Water System
Water Supply; Emergency Water Supply; Facilities; Equipment; Water System; and Water Treatment.

4. Minimum Design Criteria for System Components
Jurisdictional Regulations; Planning Considerations; Reliability and Security; Water Supply and Pressure; Pipeline Velocities, Sizing, and Material: Valves; Fire Hydrants; Cross Connection Control; Water Storage; Pump Stations; Facility Placement; Plans and Specifications; and Water Quality Standards.

5. System Analysis
Source of Water; Water Storage; Pumping; Distribution; and Water Quality Monitoring.

6. Capital Improvement Planning
System Infrastructure; Facilities Life Cycle Analysis; Project Feasibilities; Project Planning; Project Financing.

7. Operations & Maintenance
Personnel; Processes; Records; Water Quality; Safety; Emergencies; Public Notification; Preventive Maintenance.

8. Financials
Water Supply; Cost of Service; Connection Charges; Funding; Capital Improvement Financing; Developer Policies; Standard Details and Specifications; and Multi-Year Rate Study.