Port of Tacoma – Stormwater Pump Stations at Shipping Port
Romtec Utilities designed and supplied three powerful stormwater pump stations for the Port of Tacoma’s stormwater management system. These three systems were installed in drainage basins around the 135-acre port property. The systems each discharge directly into an array of modular wetland systems to remove any pollutants from the stormwater. Flygt submersible pumps with the required horsepower were installed in duplex pumping configurations to meet the varying flow rates in each system and to provide redundancy. The volume of water and requirements for these pumping systems called for rectangular wet wells with baffle walls and flap gates. During extreme weather and when the onsite water treatment systems are exceeding capacity stormwater will be discharged directly into the bay to prevent system overflow. Discharge valves were installed in separate vaults adjacent to the wet wells for easy access.
What Romtec Utilities Provided
- Pump Station Design & Engineering
- Package Pump Station Supplier
- Package Pump Station Manufacturer
- Package Pump Station Specification Writer
- On-Site Construction Adviser
- On-Site Start-Up Management
Why They Chose Romtec Utilities
The Port of Tacoma required three pump stations to send untreated stormwater through onsite water treatment systems. All stormwater that enters the marina will first travel through one of these three systems before being treated to improve the water quality at the port. Romtec Utilities worked directly with the Port’s engineer, Parametrix, to design each system. Meeting the unique requirements of this application required expertise with baffles, flap gates, and modular wetlands systems on a large scale. The pumps and electrical controls in the pump stations were supplied by Whitney Equipment. Prior to shipping the system, some mechanical assemblies were prefabricated and installed to expedite the installation and decrease interruption of Port Operations. Construction of the system was put out to public bid and awarded to Frank Coluccio Construction of Seattle. Installation of these system and the remaining site work was completed successfully. Once the systems were ready to be commissioned, Romtec Utilities sent a field technician to complete start-up, testing, and training for the operations personnel at the port.