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Current design of the flood control pump station.
Seattle Public Utilities is currently working on three stormwater projects in northwest South Park’s lower industrial basin to reduce flooding and improve water quality in the Lower Duwamish Waterway.
This project will build a pump station, which will send stormwater to the Duwamish Waterway during high tide events when the storm drain system cannot drain by gravity. The pump station will also reduce flooding on roads that already have a stormwater collection system (including catch basins and inlets).
This project is supported in part with funding from the King County Flood Control District.
SPU is currently assessing siting opportunities for the pump station and water quality facility. Sizing of the water quality facility will help determine the optimal use for SPU’s property adjacent to the 7th Ave S street-end—where SPU’s outfall is located.
SPU purchased a waterfront property at 12th Ave S and S Elmgrove St in conjunction with a 7th Ave S street-end petition to help meet permit requirements for street-end use. The street-end vacation petition was ultimately unsuccessful, but SPU remains committed to working with the community to improve the 12th Ave S and S Elmgrove St site.
When complete, this project will pump stormwater from South Park’s lower industrial basin to the Lower Duwamish Waterway, preventing water from backing up in the pipes during high tide and causing flooding.