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February 2026
Nighttime lane closures in North Delridge this week
King County is doing nighttime survey work to learn about conditions below the ground in North Delridge. Work began on Monday, February 16, and will continue through Friday, February 20. To do this work, crews will temporarily close lanes during work hours. At least one lane will be open to trucks and vehicles at all times.
We are completing this work at night to avoid daytime traffic impacts. Please watch for signs and equipment and follow directions from flaggers.
This work will help King County design new facilities to help reduce pollution and keep our local water clean.
 King County is doing nighttime survey work in North Delridge.
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When
- Work began on Monday night, February 16, and will continue through Friday, February 20
- Work hours Monday through Friday, 6 pm to 6 am the following day
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Where
- Along West Marginal Way Southwest and Southwest Spokane Street (see map above)
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What to expect
- Crews lifting maintenance hole lids and taking measurements at each survey site
- Temporary lane closures during work hours
- At least one lane open for vehicles at all times
- Work happening at one location at a time
- Construction equipment and trucks, cones, and portable lights on site
- Engine noise, hammering, and vibrations while crews are working
- Clean sites and reopened lanes once work is complete
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Why
- To learn about conditions below ground in North Delridge
- To help design facilities that will help reduce pollution in the Duwamish River
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Questions?
Connect with our team:
Visit kingcounty.gov/MDWetWeatherFacilities to learn the latest updates. If you have suggestions for ways we can work with you and your neighbors, please let us know!
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