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Wastewater Capacity Improvement Project
Overview
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.
The Port Angeles City Council awarded a contract for the CON-2023-06 Wastewater Capacity Improvements in the amount of $5,587,016.27.
Funds are available in the approved 2023 budget for Combined Sewer Overflow (CSO) capital projects in an amount not to exceed $3,100,000; in the Wastewater capital projects budget in an amount not to exceed $450,000; and for the Electrical utility portion of the project in an amount not to exceed $150,000.
Since the approval of the 2023-2028 Capital Facilities Plan (CFP), construction costs have continued to rise at a rapid rate. This funding gap has been addressed in the proposed 2024-2029 Wastewater/CSO CFP by deferred smaller projects, using excess operating reserves and utilizing slight increases to the Wastewater rate in future years.
Construction is anticipated to start in June of 2023 and extend through February of 2024. The City will provide updated schedules and project status updates to the website periodically.
Anticipated Three-Week Project Schedule:
| Location | Date | Work Description |
|---|---|---|
| Intersection of Marine Drive & Tumwater Street working west | September 5-8, 2023 | Excavation and Pipe Installation Work, Tumwater Street Closure |
| Intersection of Marine Drive & Tumwater Truck Route | September 11-15, 2023 | Excavation and Pipe Installation Work crossing the intersection |
| Intersection of 2nd Street and Marine Drive | September 18-22, 2023 | Excavation and Connection to new Sanitary Sewer Manhole |