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Georgetown Wet Weather Treatment Station
The Georgetown Wet Weather Treatment Station began operating in fall 2022, cleaning millions of gallons of polluted stormwater runoff that would have otherwise flowed directly into the Duwamish River and Puget Sound.
Construction completed 2023
Educational programming and tours
We offer education programing and public tours of Georgetown Wet Weather Treatment Station. Come learn about what a Wet Weather Treatment Station is, how the process works, and the importance of clean water.
Project description
The Georgetown Wet Weather Treatment Station, located at the corner of 4th Avenue and South Michigan Street in Seattle’s Georgetown neighborhood, can treat up to 70 million gallons of combined rain and wastewater a day that would otherwise discharge directly to the Duwamish River during heavy storms. Before the station was completed in 2022, heavy rains would fill up the area's sewer pipes, sending polluted runoff and sewage through a pipe into the river.
Previous project updates
- Daytime lane restrictions starting at 9 am on November 16 (241KB), November 7, 2022
- Post-construction underwater diving inspection of the outfall pipe this Friday, October 7 (988KB), October 4, 2022
- Weekday lane restrictions starting 10 pm Thursday, August 25 (236KB), August 25, 2022
- Weekend lane closures starts 10 pm Friday, July 15 (232KB), June 14, 2022
- Weekend lane closures extended through May 8 (563KB), April 29, 2022
- Upcoming night and weekend lane closures starting April 9 (452KB), April 2022
- March update (373KB), March 22, 2022
- Night and weekend work planned in November (551KB), November 17, 2021
- Weekend work planned for October 15 through 17 (515KB), October 11, 2021
- Nighttime construction planned to begin Friday, September 10 (475KB), September 1, 2021
- Lane closures on 4th Avenue S on Saturday, July 10, 2021 (432KB), July 8, 2021
- 24/7 sidewalk closure on 4th Ave S and S Michigan Street starting on Thursday, June 3 (381KB), June 3, 2021
- Nighttime construction planned to begin Monday, May 3 (475KB), April 28, 2021
- March update (779KB), April 6, 2021
- February update (570KB), February 26, 2021
- January update (718KB), January 21, 2021
- December update (326KB), December 14, 2020
- November update (969KB), November 6, 2020
- September update (1MB), September 24, 2020
- August update #2 (877KB), August 24, 2020
- August update (707KB), August 6, 2020
- July update (587KB), July 24, 2020
- June update #2 (679KB), June 3, 2020
- June update (587KB), June 3, 2020
- April update (661KB), April 29, 2020
- March update (300KB), March 23, 2020
- Spring 2020 newsletter (4MB), March 2020
- February update (514KB), February 2020
- January project update (547KB), January 2019
- December project update (326KB), December 2018
- November project update (969KB), November 2018
- October project update (343KB), October 2018
- Construction continues for outfall and treatment station; Conveyance contractor onboard (299KB), September 7, 2018
- Summer 2018 newsletter (2MB), August 2018
- Shoring and more excavation activities begin at station site (269KB), August 7, 2018
- Construction activities begin at King County’s outfall site (266KB), July 6, 2018
- More activities begin on site; Crews building Secant Pile Wall (582KB), April 16, 2018
- Crews installing utility monitoring points in the street starting the week of March 5 (317KB), February 22, 2018
- Station construction is expected to begin in Spring 2018 (364KB), February 12, 2018
- Fall newsletter (2MB), November 2017
- Site preparation and demolition complete (379KB), September 12, 2017
- The Georgetown Wet Weather Treatment Station project team invites you to join us at two community events in August (542KB) August 16, 2017
- Underground fuel storage tanks removal (190KB), July 17, 2017
- Demolition work continues this week (252KB), June 10, 2017
- Demolition work begins next week (187KB), May 2, 2017
- Preparation for demolition work is beginning (179KB), April 5, 2017
- South Michigan Street Sidewalk and Lane Closure - week of February 6 (193KB), February 2, 2017
- Nighttime drilling as early as Monday, Nov. 28. Workers will drill on weeknights on the McDonalds property (392KB), November 23, 2016
- Join us for an evening of Art + Water (192KB) June 16, 2016
- Spring 2016 newsletter (2MB), May 2016
- Project information sheet (237KB), Fall 2015
- Project update (399KB), November 16, 2015
- Interim designs (201KB) (Birds-eye view and plan view), November 2015
- Summer 2015 update (2MB), June 2015
- Geotechnical investigations starting Monday, February 2 (417KB), January 29, 2015
- Geotechnical investigations starting Monday, November 17 (196KB), November 14, 2014
- Summer 2014 update (6MB), June 2014
- Spring 2014 update (2MB), March 2014
- King County source control project in our Duwamish (4MB), July 2013