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<br />City of Everett • 2024 Comprehensive Sewer Plan • October 2025 <br />Executive Summary • ES-2 <br />Outfall (PSO) 4, PSO 5, PSO 6, and PSO 7, into compliance with Chapter 173-245 of the Washington <br />Administrative Code (WAC). This regulation requires the City to reduce overflow frequency to less <br />than once per year on average. The background information, analysis methodologies, and capital <br />improvement alternatives contained in this document are used to inform the 2024 Plan. <br /> 2020 Comprehensive Water Plan (CWP) reviewed and analyzed the City’s existing water system <br />and provided a 10-year CIP and financial plan to support the water system. The water demand <br />forecasts and other planning data discussed in this document are used to inform the analysis in the <br />2024 Plan. <br /> 2017 & 2022 Surface Water Comprehensive Plan (SWCP) addressed continued surface water <br />issues. The analyses presented in the SWCP used similar criteria as the 2014 Plan and rainfall inputs <br />that inform the 2024 Plan. <br />The PGSF project recommended in 2021 PGSF GSP is being completed in three phases. The status of the <br />three phases as of the date of the 2024 Plan is described below: <br /> Phase 1 is complete and included engineering reports and analysis of the sewer system and <br />affected area. <br /> Phase 2 is ongoing and includes engineering and design related to PGSF and some demolition at <br />the site in preparation for construction. <br /> Phase 3 has not started and will include construction and sewer system improvements. The <br />Department of Ecology (Ecology) has set a deadline of December 31, 2027 for the PGSF to be <br />complete and operational. <br />How The 2024 Plan Should Be Used <br />The 2024 Plan serves as a guiding document for the City’s sewer system improvements. Use of this plan <br />should be supplemented with: <br /> Annual reviews of CIP to validate short term investment. <br /> An overall Plan update every 10 years to address system changes. <br /> Regular updates to the geographic information system data and corresponding hydraulic model to <br />reflect ongoing system improvements and expansion. <br /> Detailed designs for identified capital projects. <br /> Updates and refinements to cost estimates during conceptual and final project designs. <br />WAC Requirements <br />The 2024 Plan fulfills the requirements of the WAC 173-240-050 (General Sewer Plan). Table ES-1 <br />summarizes the requirements and the sections in the 2024 Plan where the requirements are addressed.