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I-405, I-5, SR 4 closures scheduled for late August-early September

Saturday, August 29, 2026
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Multiple highway closures and lane reductions are scheduled for Everett-area roads from late August through early September, according to Washington State Department of Transportation (WSDOT) records.

I-405 will have overnight southbound closures from 9 p.m. Thursday, Sept. 3 to 5 a.m. Friday, Sept. 4, between mileposts 12 and 10. Northbound I-405 will close from 11 p.m. Friday, Aug. 28 to 5 a.m. Monday, Aug. 31, between Northeast 85th Street and Northeast 100th Street. I-5 will have single-lane reductions nightly from 8 p.m. to 5 a.m. near exit 240 (Alger/Lake Samish Road) through Sept. 4, and northbound I-5 will have left-lane closures nightly from 8 p.m. to 5 a.m. north of exit 246 through Sept. 4. SR 4 will have a single lane closed weekdays from 7:30 a.m. to 5 p.m. between 50th and 42nd Avenues through Sept. 11.

WSDOT states the I-5 work is for fish passage construction, with details available on a project webpage. SR 4 work involves a buried gas main line extension. The closures are scheduled to end on the dates listed in the WSDOT records, with some projects extending through early September.

📄 Source: WSDOT — Highway Construction & Closures — https://wsdot.wa.gov/travel/road-construction
Source receipts12 of 14 claims supported · 86%

Legacy automated check: the original source text was not preserved. These earlier verdicts have not passed the current publication checks and may contain errors. Source: original document ↗

  • ✓
    Multiple highway closures and lane reductions are scheduled for Everett-area roads from late August through early September“020: 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.”
  • ⚠
    The information is according to Washington State Department of Transportation (WSDOT) recordsNo usable supporting receipt — unverified.
  • ✓
    I-405 will have overnight southbound closures 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.”
  • ✓
    The southbound closures on I-405 are between mileposts 12 and 10“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.”
  • ✓
    Northbound I-405 will close from 11 p.m. Friday, Aug. 28 to 5 a.m. Monday, Aug. 31“405: Up to three lanes of northbound I-405 will close from the Northeast 85th Street on-ramp to Northeast 100th Street from 11 p.m. Friday Aug. 28 to 5 a.m. Monday, Aug. 31. A signed detour will be in place.”
  • ✓
    The northbound closures on I-405 are between Northeast 85th Street and Northeast 100th Street“405: Up to three lanes of northbound I-405 will close from the Northeast 85th Street on-ramp to Northeast 100th Street from 11 p.m. Friday Aug. 28 to 5 a.m. Monday, Aug. 31. A signed detour will be in place.”
  • ✓
    I-5 will have single-lane reductions nightly from 8 p.m. to 5 a.m. near exit 240 (Alger/Lake Samish Road) 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.”
  • ✓
    Northbound I-5 will have left-lane closures nightly from 8 p.m. to 5 a.m. north of exit 246 through Sept. 4“005: The left lane of northbound I-5 will close from 8 p.m. to 5 a.m. nightly Sunday, Aug. 30, through Friday morning, Sept. 4, north of North Lake Samish (exit 246) for fish passage construction.”
  • ✓
    SR 4 will have a single lane closed weekdays from 7:30 a.m. to 5 p.m. between 50th and 42nd Avenues 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.”
  • ✓
    WSDOT states the I-5 work is for fish passage construction“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. More information on the <a href="https://wsdot.wa.gov/construction-planning/search-projects/i-5-tributaries-friday-lake-chuckanut-creeks-fish-passage">project webpage</a>.”
  • ✓
    Details about the I-5 work are available on a project webpage“More information on the <a href="https://wsdot.wa.gov/construction-planning/search-projects/i-5-tributaries-friday-lake-chuckanut-creeks-fish-passage">project webpage</a>.”
  • ✓
    The SR 4 work involves a buried gas main line extension“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. Slow down, stay focused and watch for flaggers direction through the work zone.”
  • ✓
    The closures are scheduled to end on the dates listed in the WSDOT records“Expected end: Sep 4, 2026, 5:00 AM”
  • ⚠
    Some projects are scheduled to extend through early SeptemberNo usable supporting receipt — unverified.

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