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Infrastructure

I-405, I-5, SR 20 closures announced

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WSDOT announced multiple road closures affecting Walla Walla, WA, starting in late August and continuing through early September 2026.

I-405 will have overnight closures from milepost 12 to Coal Creek Parkway Southeast on Thursday, Sept. 3, from 9 p.m. to 5 a.m. Friday, Sept. 4. I-5 will have single-lane reductions nightly from Aug. 31 through Sept. 4 near Alger/Lake Samish Road (exit 240), and a left lane closure on northbound I-5 from Aug. 30 through Sept. 4 north of North Lake Samish (exit 246). State Route 20 will have alternating traffic with flaggers from Swin Slough Bridge to Laconner Whitney Road/Bay View Road starting Aug. 21 until further notice.

The closures are for utility work, fish passage construction, and gas main line extension. WSDOT advises drivers to expect delays and follow flagger directions. The I-5 fish passage project is ongoing through Sept. 10, while other closures end between Sept. 4 and Sept. 11.

πŸ“„ Source: WSDOT β€” Highway Construction & Closures β€” https://wsdot.wa.gov/travel/road-construction
Source receipts14 of 18 claims supported Β· 78%

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  • ⚠
    WSDOT announced multiple road closures affecting Walla Walla, WANo usable supporting receipt β€” unverified.
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    The road closures will start in late August 2026β€œ020: 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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    The road closures will continue through early September 2026No usable supporting receipt β€” unverified.
  • βœ“
    I-405 will have overnight closures from milepost 12 to Coal Creek Parkway Southeastβ€œ405: 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.”
  • βœ“
    The I-405 closures will occur on Thursday, Sept. 3β€œ405: 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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    The I-405 closures will last from 9 p.m. to 5 a.m. Friday, Sept. 4No usable supporting receipt β€” unverified.
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    I-5 will have single-lane reductions nightly from Aug. 31 through Sept. 4β€œ005: 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 single-lane reductions on I-5 will be near Alger/Lake Samish Road (exit 240)β€œ005: 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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    A left lane closure on northbound I-5 will occur from Aug. 30 through Sept. 4β€œ005: 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.”
  • βœ“
    The left lane closure on northbound I-5 will be north of North Lake Samish (exit 246)β€œ005: 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.”
  • βœ“
    State Route 20 will have alternating traffic with flaggers from Swin Slough Bridge to Laconner Whitney Road/Bay View Roadβ€œ020: 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.”
  • βœ“
    The alternating traffic on State Route 20 will start Aug. 21β€œ020: 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.”
  • βœ“
    The alternating traffic on State Route 20 will continue until further noticeβ€œ020: 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.”
  • βœ“
    The closures are for utility work, fish passage construction, and gas main line extensionβ€œ020: 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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    WSDOT advises drivers to expect delaysβ€œSlow down, stay focused and watch for flaggers direction through the work zone.”
  • βœ“
    WSDOT advises drivers to follow flagger directionsβ€œSlow down, stay focused and watch for flaggers direction through the work zone.”
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    The I-5 fish passage project is ongoing through Sept. 10β€œ005: 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>. Effective: Aug 14, 2026, 12:55 PM Expected end: Sep 10, 2026, 5:00 AM 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. 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>. Effective: Aug 14, 2026, 12:49 PM Expected end: Sep 4, 2026, 5:00 AM ”
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    Other closures will end between Sept. 4 and Sept. 11No usable supporting receipt β€” unverified.

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