Infrastructure

I-405, I-5, SR 4 closures begin or continue

Sunday, August 30, 2026

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WSDOT announced several highway and road closures in Vancouver, WA, effective through early September. The most significant changes include a southbound I-405 closure from milepost 12 to Coal Creek Parkway Southeast from 9 p.m. Thursday, Sept. 3, to 5 a.m. Friday, Sept. 4. Additionally, I-5 will be reduced to a single lane nightly from 8 p.m. to 5 a.m. near Alger/Lake Samish Road (exit 240) from Aug. 31 through Sept. 4.

SR 4 will have a single lane closure in both directions between 50th and 42nd Avenues weekdays from 7:30 a.m. to 5 p.m. through Sept. 11 for gas main work. State Route 99 will have a right lane closure from Russell Way to Gibson Road on Aug. 31 to Sept. 1 for utility work. WSDOT advises drivers to slow down and watch for flaggers in work zones.

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

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WSDOT announced several highway and road closures in Vancouver, WA, effective through early SeptemberNo usable supporting receipt — unverified.
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The most significant changes include a southbound I-405 closure from milepost 12 to Coal Creek Parkway SoutheastNo usable supporting receipt — unverified.
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The southbound I-405 closure will be from 9 p.m. Thursday, Sept. 3, to 5 a.m. Friday, Sept. 4“405: Up to two lanes of southbound I-405 from milepost 12 to Coal Creek Parkway Southeast (milepost 10) will be closed overnight, 9 p.m. Thursday, Sept. 3 – 5 a.m. Friday, Sept. 4.”
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I-5 will be reduced to a single lane nightly from 8 p.m. to 5 a.m. near Alger/Lake Samish Road (exit 240)“005: The northbound and southbound I-5 will be reduced to a single lane from 8 p.m. to 5 a.m. nightly Monday, Aug. 31, through Friday morning, Sept. 4, near Alger/Lake Samish Road (exit 240) for fish passage construction.”
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The I-5 single lane reduction will be from Aug. 31 through Sept. 4“005: The northbound and southbound I-5 will be reduced to a single lane from 8 p.m. to 5 a.m. nightly Monday, Aug. 31, through Friday morning, Sept. 4, near Alger/Lake Samish Road (exit 240) for fish passage construction.”
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SR 4 will have a single lane closure in both directions between 50th and 42nd Avenues weekdays“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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The SR 4 single lane closure will be from 7:30 a.m. to 5 p.m. 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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The SR 4 single lane closure is for gas main work“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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State Route 99 will have a right lane closure from Russell Way to Gibson Road“099: From 8 p.m. Monday, Aug. 31 to Tuesday, Sept. 1, the right lane of State Route 99 from Russell Way/North Manor Way to Gibson Road (milepost 51) will close for utilities work.”
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The State Route 99 right lane closure will be from Aug. 31 to Sept. 1“099: From 8 p.m. Monday, Aug. 31 to Tuesday, Sept. 1, the right lane of State Route 99 from Russell Way/North Manor Way to Gibson Road (milepost 51) will close for utilities work.”
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The State Route 99 right lane closure is for utility work“099: From 8 p.m. Monday, Aug. 31 to Tuesday, Sept. 1, the right lane of State Route 99 from Russell Way/North Manor Way to Gibson Road (milepost 51) will close for utilities 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.”