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North Beach combined sewer overflow control
The wet weather storage facility is now operational. While the bulk of construction work was completed in December 2015, the contractor completed some work on the pump station site through early 2017. This included work on the new building, final landscaping and drainage improvements.
Completed Spring 2017
King County has completed construction of an underground storage tank in the right-of-way in N.W. Blue Ridge Drive and Triton Drive N.W. This facility can store up to 380,000 gallons of untreated water when the North Beach Pump Station reaches maximum capacity.
Project overview
The underground storage tank in the right-of-way in Northwest Blue Ridge Drive and Triton Drive Northwest stores peak flows when the North Beach Pump Station reaches maximum capacity. After storms have passed, an underground pump transfers stored flows to the pump station for conveyance to King County’s Carkeek Wet Weather Treatment Facility for transfer to West Point Treatment Plant or onsite treatment. The project includes an underground diversion structure (that conveys peak flows to the facility), and a new odor control and electrical facility on King County property.
Project overview map, January 2014
Landscape site plan. Source: project newsletter, February 2015