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Page 2 of 41State of Washington Department of Ecology <br />Agreement No: <br />Project Title: <br />Recipient Name: <br />WQC-2025-EverPW-00038 <br />Riverpoint Outfall Replacement <br />City of Everett <br />and floods Railway Avenue. <br />The Snohomish River is not currently on Washington’s 303(d) List for impaired designated uses. The shoreline of <br />Snohomish River is a Category 2 riverine wetland. The RECIPIENT will delineate the wetland impact area and obtain <br />all necessary permits prior to constructing the project. <br />The RECIPIENT will design improved local conveyance and a treatment system consisting of a pretreatment device to <br />collect trash and large debris and a treatment device that will provide treatment for total suspended solids (TSS), oil <br />(total petroleum hydrocarbons), dissolved copper and zinc, and total phosphorus. The design will include replacing the <br />existing 12-inch pipe with a 42-inch pipe to accommodate 100-year storm events. The new 42-inch pipe will bypass <br />high flows around the treatment device and a new 12-inch pipe will direct water to the treatment device. An in-line <br />check valve will act as a tide gate to prevent backflow into the new system. The design will also include a new outfall <br />and a rock energy dissipation pad to prevent scouring at the outfall . The contributing area for the project is <br />approximately 45 acres. <br />Overall Goal: <br />This project will help protect and restore water quality in Washington State by reducing stormwater impacts from <br />existing infrastructure and development. <br />Template Version 12/10/2020 <br />Docusign Envelope ID: F2F2C641-00FF-4CD2-8410-C8E2A1EA5EB0