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Project update

July 5, 2017

Join King County Wastewater Treatment Division at the garden walk in Georgetown this Sunday, July 9. We will have a table at the Bank of America parking lot (1112 South Bailey Street) from 10:00 a.m. to 3:00 p.m.

We would love to discuss the Georgetown Wet Weather Treatment Station with you. Construction on the station, located at the corner of 4th Avenue South and South Michigan Street, began earlier this year and is expected to wrap up in 2022.

For all you avid gardeners, we will be handing out samples of our GroCo compost. Grab a sample and learn more about what makes GroCo great! Hope to see you there.

Construction updates

Construction hotline: 206-205-9286 


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Construction hotline:

Contact Kristine Cramer at:


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Project description

May 2016 project newsletter

The Georgetown Wet Weather Treatment Station has completed initial design work. The equipment, layout, and building materials have been decided, and now the project team is working on more detailed engineering drawings, and finer details about the site such as lighting, fencing, and plant selection. Georgetown neighbors and the community Design Advisory Group provided important input into the station’s look and feel. See examples of how the community influenced the design in the newsletter  and on the facility design page.

The Georgetown Wet Weather Treatment Station Project includes the construction of a combined sewer overflow (CSO) wet-weather treatment station between the Brandon Street and South Michigan Street Regulator Stations, related pipes  and a new outfall structure to release the treated water into the Duwamish River. When constructed, the station can treat up to 70 million gallons of combined rain and wastewater a day that would otherwise have discharged directly to the Duwamish without treatment during storm events.

Project schedule

The project timeline is as follows:

project timeline

Project location


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