Tri-Cities Road Closures Updated for September 2026

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  WSDOT announced several updates to road construction schedules on September 17, 2026No usable supporting receipt — unverified.
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  Closures on US-395 near Pasco will end on September 17“395 [4 mi from Tri-Cities]: Northbound US-395 mileposts 22 to 23 near Pasco: Sunday, Sept. 13 through Thursday, Sept. 17 from 6 p.m. to 4:30 a.m. nightly, there will be a double lane closure for bridge work. Effective: Jul 8, 2026, 9:36 AM Expected end: Sep 17, 2026, 4:30 PM”
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  The closure on US-395 near Pasco will end at 4:30 p.m.“Expected end: Sep 17, 2026, 4:30 PM”
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  SR-224 in West Richland remains closed until September 30“224 [13 mi from Tri-Cities]: Until further notice SR 224 (Van Giesen) is closed, and detours are in place between Keene Rd. intersection and Paradise Way intersection in West Richland for construction of a new roundabout. Traffic is detoured using local roads. Effective: Dec 9, 2025, 11:10 AM Expected end: Sep 30, 2026, 1:00 AM”
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  SR-730 and SR-240 will see ongoing work through September 18“730 [16 mi from Tri-Cities]: SR 730 between the Jct. of US 12 and the Oregon State Line milepost 0 to 6: Monday through Friday from 6 a.m. to 6 p.m. until further notice, there will be flagger and pilot vehicle controlled alternating traffic for roadwork.”
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  SR-124 near Waitsburg will close until September 18“124 [44 mi from Tri-Cities]: Until September 18 both directions SR-124 from Bolles Road (milepost 41) to Coppei Ave (milepost 45) in Waitsburg will be closed for environmental remediation work. Follow posted detour routes. City roads will remain open to local traffic.”
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  Drivers should expect delays on US-395 during overnight work until the closure ends ThursdayNo usable supporting receipt — unverified.
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  The SR-224 closure for a new roundabout in West Richland will continue through September 30“224 [13 mi from Tri-Cities]: Until further notice SR 224 (Van Giesen) is closed, and detours are in place between Keene Rd. intersection and Paradise Way intersection in West Richland for construction of a new roundabout. Traffic is detoured using local roads. Effective: Dec 9, 2025, 11:10 AM Expected end: Sep 30, 2026, 1:00 AM”
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  The SR-224 closure will involve detours using local roads“224 [13 mi from Tri-Cities]: Until further notice SR 224 (Van Giesen) is closed, and detours are in place between Keene Rd. intersection and Paradise Way intersection in West Richland for construction of a new roundabout. Traffic is detoured using local roads.”
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  SR-730 and SR-240 will have alternating traffic controlled by flaggers during weekday hours“730 [16 mi from Tri-Cities]: SR 730 between the Jct. of US 12 and the Oregon State Line milepost 0 to 6: Monday through Friday from 6 a.m. to 6 p.m. until further notice, there will be flagger and pilot vehicle controlled alternating traffic for roadwork.”
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  SR-124 in Waitsburg will remain closed through September 18 for environmental remediation work“124 [44 mi from Tri-Cities]: Until September 18 both directions SR-124 from Bolles Road (milepost 41) to Coppei Ave (milepost 45) in Waitsburg will be closed for environmental remediation work. Follow posted detour routes. City roads will remain open to local traffic.”