Wastewater Capacity Improvement Project

The Wastewater Capacity Improvement Project (CON-2023-06) seeks to address two high-risk capacity constrained segments of the sanitary sewer collection system: (1) WW0120 Pump Station 3 Force Main Replacement, and (2) WW0220 West 4th Street Capacity Improvement. These conveyance upgrades serve to increase sewer capacity to an area which contains 41% of City utility customers, in addition to a significant portion of the City’s projected future growth. Pump Station 3 Force Main Replacement The Pump Station 3 Force Main Replacement will install a replacement force main along the Port Angeles Waterfront (within the Marine Drive Right-of-Way). The force main will extend from the intersection of Hill Street and Marine Drive (existing Pump Station 3) to the intersection of 3rd Street and Marine Drive. West 4th Street Capacity Improvement The West 4th Street Capacity Improvement will install a parallel gravity main along West 4th Street (within the 4th Street Right-of-Way). The gravity main will extend from the intersection of Milwaukee Drive and N Street to the intersection of 4th Street and Evans Ave. The Prime Contractor for this project is Scarsella Bros., Inc. of Kent, WA. Construction Components The Wastewater Capacity Improvements are a furtherance of the Combined Sewer Overflow (CSO) Phase 1 & 2 investment; this project is a culmination of a multi-phase plan to eliminate sanitary sewer overflows along Marine Drive, West 4th Street, and more effectively utilize the Combined Sewer Overflow Storage Tank constructed during CSO Phase 1. Project work includes the following construction components: Installation of a new 20-inch diameter HDPE sanitary sewer force main, via slip lining an existing abandoned 48-inch industrial water line and by means of open cut construction. Installation of new 18-inch & 21-inch diameter PVC gravity sewer via open cut construction. Installation of new 4-inch PVC electrical conduit via open cut construction within existing City right-of-way for a future underground cable replacement project. Installation of 9 new sanitary sewer manholes. Installation of 3 new combination air/vacuum relief valve vaults. Installation of a new flowmeter, pressure sensor, concrete vault, and associated piping, site and pump station electrical improvements, controls integration. Installation of 4 new ADA curb ramps, and pavement restoration.

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