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Infrastructure

I-405, SR 9 closures start Aug. 28

Friday, August 28, 2026

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Starting Friday night, Aug. 28, I-405 will see multiple lane closures on both northbound and southbound routes. Southbound I-405 will close up to four lanes from milepost 14. 25 to 12. 5 from 10 p.m. Friday until 8 a.m. Saturday. Northbound I-405 will close up to three lanes from Northeast 85th Street on-ramp to Northeast 100th Street from 11 p.m. Friday until 5 a.m. Monday, and all lanes will close from Northeast 70th Place to Northeast 85th Street from 11 p.m. Friday until 5 a.m. Monday.

State Route 9 will be reduced to a single lane near Kalloch Road (MP 59) with alternating traffic for 42 days until Sept. 14 for fish passage construction. Traffic will also alternate on SR 9 from 10 a.m. to 4 p.m. daily through Sept. 3 near Mount Vernon Big Lake Road. The WSDOT project webpage provides more details on the fish passage work. SR 547 will have alternating traffic with flaggers from Aug. 24 to Sept. 4 for PSE utility work. SR 599 will close the right lane and off-ramp for maintenance from 9 p.m. Friday to 5 a.m. Saturday.

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

Checked against the public record13 of 13 claims · 100%

Every factual claim below was checked against the original public record. Source: original document ↗

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Starting Friday night, Aug. 28, I-405 will see multiple lane closures on both northbound and southbound routes.“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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Southbound I-405 will close up to four lanes from milepost 14.25 to 12.5“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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The closure on Southbound I-405 will last from 10 p.m. Friday until 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 close up to three lanes from Northeast 85th Street on-ramp to 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.”
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The closure on Northbound I-405 will last from 11 p.m. Friday until 5 a.m. Monday.“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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All lanes on Northbound I-405 will close 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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The closure on Northbound I-405 will last from 11 p.m. Friday until 5 a.m. Monday.“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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State Route 9 will be reduced to a single lane near Kalloch Road (MP 59) with alternating traffic for 42 days“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 single lane on State Route 9 near Kalloch Road (MP 59) will last until Sept. 14“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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Traffic will also alternate on SR 9 from 10 a.m. to 4 p.m. daily through Sept. 3 near Mount Vernon Big Lake Road.“009: Northbound and southbound traffic will alternate from 10 a.m. to 4 p.m. daily Mondays through Thursday through Thursday, Sept. 3, just south of Mount Vernon Big Lake Road (milepost 49) for fish passage construction. Expect delays in the area.”
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The WSDOT 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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SR 547 will have alternating traffic with flaggers from Aug. 24 to Sept. 4 for PSE utility work.“547: Weekdays from 9 a.m. to 3 p.m. beginning Monday, Aug. 24 until noon Friday, Sept. 4, State Route 547 traffic will alternate with flaggers from State Route 542 (milepost 0) to Frost Road (milepost 6) will close for PSE utilities work.”
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SR 599 will close the right lane and off-ramp for maintenance from 9 p.m. Friday to 5 a.m. Saturday.“599: From 9 p.m. Friday, Aug. 28 to 5 a.m. Saturday, Aug. 29, the right lane of northbound State Route 599 and the off-ramp to Tukwila International Boulevard (milepost 1) will close for maintenance.”