Infrastructure

I-405, SR 522 roadwork to begin Aug. 31

Tuesday, September 1, 2026

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WSDOT will implement multiple highway closures starting Monday, Aug. 31, affecting I-405, I-90, and several state routes in Wenatchee. The most significant changes include overnight closures on I-405 southbound from milepost 12 to Coal Creek Parkway, and up to four lanes closed nightly on I-405 northbound from milepost 11. 5 to 13. 7.

Daily lane alternations will continue on State Route 20 from Swin Slough Bridge to Laconner Whitney Road for city utility work. SR 4 will see single-lane closures weekdays between 50th and 42nd Avenues for gas line extension work through Sept. 11. WSDOT advises drivers to slow down and watch for flaggers in work zones.

The closures are scheduled to end between Sept. 1 and Sept. 11, depending on the location. WSDOT states the work is for infrastructure maintenance and utility projects.

📄 Source: WSDOT — Highway Construction & Closures — https://wsdot.wa.gov/travel/road-construction

Source receipts5 of 9 claims supported · 56%

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WSDOT will implement multiple highway closures starting Monday, Aug. 31No usable supporting receipt — unverified.
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Highway closures will affect I-405, I-90, and several state routes in WenatcheeNo usable supporting receipt — unverified.
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The most significant changes include overnight closures on I-405 southbound from milepost 12 to Coal Creek ParkwayNo usable supporting receipt — unverified.
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Up to four lanes will be closed nightly on I-405 northbound from milepost 11.5 to 13.7“405: Up to four lanes of northbound I-405 from milepost 11.5 to milepost 13.7 will be closed nightly, 9:30 p.m. Monday, Aug. 31 – 4:30 a.m. Friday, Sept. 4.”
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Daily lane alternations will continue on State Route 20 from Swin Slough Bridge to Laconner Whitney Road for city utility work“Daily (except Saturday, Sunday) beginning Aug. 21 until further notice: State Route 20 traffic will alternate with flaggers from the Swin Slough Bridge (milepost 50) to Laconner Whitney Road/Bay View Road (milepost 53) for city Anacortes utilities work.”
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SR 4 will see single-lane closures weekdays between 50th and 42nd Avenues for gas line extension work through Sept. 11“004: Monday, Aug. 17 through Friday, Sept. 11: A single lane in both directions of SR 4 between 50th Avenue (milepost 56.4) and 42nd Avenue (milepost 57.2) will be closed weekdays from 7:30 a.m. to 5 p.m., for buried gas main line extension work.”
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WSDOT advises drivers to slow down and watch for flaggers in work zones“Slow down, stay focused and watch for flaggers direction through the work zone.”
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The closures are scheduled to end between Sept. 1 and Sept. 11, depending on the location“004: Monday, Aug. 17 through Friday, Sept. 11: A single lane in both directions of SR 4 between 50th Avenue (milepost 56.4) and 42nd Avenue (milepost 57.2) will be closed weekdays from 7:30 a.m. to 5 p.m., for buried gas main line extension work.”
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WSDOT states the work is for infrastructure maintenance and utility projectsNo usable supporting receipt — unverified.