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. , 5 <br /> SECTION 1 <br /> EXECUTIVE SUMMARY <br /> Purpose of Plan Update <br /> All water purveyors in the State of Washington are required by <br /> state law to develop a water system plan and update the plan every <br /> five years. This document is an update of Everett's Water System <br /> Plan that was developed and approved by the Washington State <br /> Department of Social and Health Services (DSHS) in July, 1982 . <br /> The purpose of this water system plan update is to develop a <br /> logical, cost effective capital improvement program to expand and <br /> upgrade the water system in response to future growth. The capital <br /> improvement program also includes projects to correct existing water <br /> system deficiencies. This document will be referenced by City <br /> personnel when specific land use actions are being reviewed. This <br /> will ensure that future land use actions are consistent with the <br /> long-range water system plan. <br /> Methodology <br /> The key to developing a water system plan is projecting system <br /> water demands in future planning years. Water demand projections in <br /> this plan were based upon population projections, historical water <br /> use patterns and an assumed future water service area for Everett's <br /> water system (consisting of the entire western one-third of Snohomish <br /> County) . <br /> Population projections for areas within the City of Everett were <br /> provided by the Everett Planning Department. Population projections <br /> outside the City of Everett were provided by the Snohomish County <br /> Planning Department and the Everett/Snohomish County Impact <br /> Coordinating Council (ESCICC) . <br /> A computer program was used to determine the capital <br /> improvements needed to meet the system's future water demands. The <br /> computer program simulated the flow of water through the City's water <br /> system and identified potential problems such as insufficient water <br /> pressure or excessive pipeline velocities. <br /> Summary of Capital Improvement Program <br /> This plan projects the peak day demand of Everett's water system <br /> to increase from a current 113 million gallons per day (MGD) to 187 <br /> MGD by the year 2000, or an increase of 63%. By 2010, the peak day <br /> demand is projected to increase to 211 MGD or an increase of 87% <br /> above the current peak day demand. <br /> i K <br /> 1-1 <br />