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July 2026
Upcoming traffic impacts in North Delridge, Pioneer Square and SODO begin as soon as July 13
Crews will be working in North Delridge, Pioneer Square, and SODO as early as Monday, July 13, 2026. King County is doing this work to learn about conditions below ground. We will use this information to design facilities to help protect water quality in the Duwamish River and Elliott Bay. At all locations, expect temporary lane closures with at least one lane open for vehicles. Crews will clean sites and reopen lanes once work is complete.
North Delridge
- Daytime work will start as early as Monday, July 13, and continue for up to seven weeks. Work hours are Monday through Friday, 7:30 a.m. to 5 p.m.
- Crews will work for one night along West Marginal Way Southwest, between Southwest Spokane Street and Southwest Idaho Street. Work will start on Monday, July at 6 p.m. and end at 6 a.m. the next day.
- Work will take place on West Marginal Way Southwest between Chelan Avenue Southwest and Southwest Idaho Street. Crews may work at one to three sites at a time, for up to two days per site.
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What to expect:
- Trucks, cones, and portable lights on site during nighttime work
- Crews lifting maintenance hole lids and taking measurements
- A truck and support vehicle for crews completing surveys
Pioneer Square
- Daytime work will start as early as Monday, July 13, and will continue for up to two weeks. Work hours are Monday through Friday, 7:30 a.m. to 5 p.m.
- Work will take place on:
- South King Street, between First Avenue South and Second Avenue South
- Occidental Avenue South, between South King Street and South Massachusetts Street
- At the intersection of Colorado Avenue South and South Massachusetts Street
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What to expect:
- Crews lifting maintenance hole lids and taking measurements at each site
- Trucks and cones on site
- Engine noise, hammering, and vibrations while crews are working
SODO
- Daytime work will start as early as Monday, July 13, and will continue for up to seven weeks. Work hours are Monday through Friday, 7:30 a.m. to 5 p.m.
- Work will take place on:
- Utah Avenue South, between South Massachusetts Street and the Spokane Street Viaduct
- South Hinds Street, between First Avenue South and East Marginal Way South
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What to expect:
- Crews working at one to three sites at a time, for up to two days per site
- A truck and support vehicle for crews completing surveys
- Engine noise, hammering, and vibrations while crews are working
Learn more about the project
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