South Park Pump Station

What & Why

Seattle Public Utilities (SPU) is currently working on three stormwater projects in South Park’s lower industrial basin, in the northwest portion of the South Park neighborhood to reduce flooding and improve water quality in the Lower Duwamish Waterway. 

This project will build a pump station, which will send stormwater runoff to the Duwamish Waterway during high tide events when the storm drain system cannot drain by gravity. In doing so, the pump station will reduce flooding on roads that have a formal stormwater collection system (including catch basins and inlets). This project will work in unison with the South Park Conveyance project to reduce flooding in the South Park lower industrial basin.

This project is supported in part by funding from the King County Flood Control District.

What’s happening now?

SPU has determined that the pump station will be located at the SPU-owned parcels at 636 and 640 S Riverside Drive, which sit adjacent to the 7th Ave S street-end where’s SPU’s stormwater 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 vacation petition to meet shoreline permit requirements for the intended 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 property.

Project goals and benefits

When complete, this project will pump stormwater from South Park’s lower industrial basin into the Lower Duwamish Waterway, preventing water from backing up in the pipes during high tide and causing flooding.