Infrastructure

I-405, SR 9 closures this weekend

Friday, August 28, 2026

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I-405 and SR 9 will see multiple lane closures starting Friday night, Aug. 28, for construction work, according to WSDOT.

Southbound I-405 will close from milepost 14.25 to 12.5 from 10 p.m. Friday to 8 a.m. Saturday. Northbound I-405 will have multiple closures from 11 p.m. Friday to 5 a.m. Monday, including all lanes from Northeast 70th Place to Northeast 85th Street. SR 9 will have single-lane traffic with alternating signals near Kalloch Road (MP 59) until Sept. 14 for fish passage construction.

WSDOT notes delays are expected during the closures. The SR 9 project webpage provides more details on the fish passage work. Other closures include State Route 599, 547, and a long-term I-5 lane closure in Fife through August 2027.

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

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I-405 and SR 9 will see multiple lane closures starting Friday night, Aug. 28, for construction work“405: Up to four lanes of southbound I-405 from milepost 14.25 to milepost 12.5 will be closed overnight, 10 p.m. Friday, Aug. 28 – 8 a.m. Saturday, Aug. 29. 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. 405: All lanes of northbound I-405 will close from Northeast 70th Place to Northeast 85th Street from 11 p.m. Friday Aug. 28 to 5 a.m. Monday, Aug. 31.”
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WSDOT notes delays are expected during the closures“Expect delays in the area.”
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Southbound I-405 will close from milepost 14.25 to 12.5 from 10 p.m. Friday to 8 a.m. Saturday“405: Up to four lanes of southbound I-405 from milepost 14.25 to milepost 12.5 will be closed overnight, 10 p.m. Friday, Aug. 28 – 8 a.m. Saturday, Aug. 29.”
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Northbound I-405 will have multiple closures from 11 p.m. Friday to 5 a.m. Monday“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. Effective: Aug 24, 2026, 12:00 AM Expected end: Aug 31, 2026, 5:00 AM 405: All lanes of northbound I-405 will close from Northeast 70th Place to Northeast 85th Street from 11 p.m. Friday Aug. 28 to 5 a.m. Monday, Aug. 31. A signed detour will be in place. Effective: Aug 21, 2026, 12:00 AM Expected end: Aug 31, 2026, 5:00 AM”
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Northbound I-405 will have all lanes closed from Northeast 70th Place to Northeast 85th Street“405: All lanes of northbound I-405 will close from Northeast 70th Place to Northeast 85th Street from 11 p.m. Friday Aug. 28 to 5 a.m. Monday, Aug. 31. A signed detour will be in place.”
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SR 9 will have single-lane traffic with alternating signals near Kalloch Road (MP 59) until Sept. 14 for fish passage construction“009: SR 9 is reduced to a single lane near Kalloch Road (MP 59) with a signal alternating northbound and southbound traffic through a bypass road for 42 days, until Sept. 14 for fish passage construction.”
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The SR 9 project webpage provides more details on the fish passage work“More information on the <a href="https://wsdot.wa.gov/construction-planning/search-projects/sr-9-unnamed-tributaries-nookachamps-hansen-creeks-fish-passage">project webpage</a>.”
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Other closures include State Route 599No usable supporting receipt — unverified.
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Other closures include State Route 547No usable supporting receipt — unverified.
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Other closures include a long-term I-5 lane closure in Fife through August 2027“005: The right lane of northbound I-5 is closed from East 28th Street in Tacoma to 20th Street East in Fife. The lane closure will remain in place through August 2027. The off-ramp to 20th Street East is open. Work is for the City of Fife <a href="https://fifewa.gov/m/newsflash/home/detail/186">Port of Tacoma Phase 2 project</a>.”