Infrastructure

I-405, SR 9 closures for construction

Tuesday, August 25, 2026

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I-405 will see multiple lane closures and detours from August 24 to August 31, including nightly northbound closures from milepost 0 to 1.5 and a full closure from Northeast 70th Place to Northeast 85th Street. SR 9 near Kalloch Road will be reduced to a single lane for 42 days until September 14 for fish passage construction.

WSDOT states the I-5 northbound lane closures from milepost 189 to 191 will occur nightly from 9 p.m. to 5 a.m. beginning August 24. The fish passage project on SR 9 will require alternating traffic through a bypass road until September 14, with additional alternating traffic on weekdays through September 3. All closures are scheduled to end by the specified dates.

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

Source receipts7 of 10 claims supported · 70%

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 ↗

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I-405 will see multiple lane closures and detours from August 24 to August 31“405: Up to two lanes of northbound I-405 from I-5 (milepost 0) to milepost 1.5 will be closed nightly, 9 p.m. Monday, Aug. 24 – 5 a.m. Wednesday, Aug. 26. 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 4 a.m. Monday, Aug. 31. A signed detour will be in place. 405: The HOV lane of southbound I-405 from SR 181 (milepost 1) to I-5 (milepost 0) will be closed nightly, 9:30 p.m. Monday, Aug. 24 – 5 a.m. Friday, Aug. 28. 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 4 a.m. Monday, Aug. 31. A signed detour will be in place. 405: Nightly from 11:59 p.m. to 4 a.m. the next day beginning Monday, Aug. 24 to 4 a.m. Wednesday, Aug. 26, expect intermittent rolling slowdowns on both directions of Interstate 405 from Northeast 145th Street (milepost 21) to Coal Creek Parkway/Newport Way (milepost 10) for PSE utilities work.”
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Nightly northbound closures on I-405 will occur from milepost 0 to 1.5“405: Up to two lanes of northbound I-405 from I-5 (milepost 0) to milepost 1.5 will be closed nightly, 9 p.m. Monday, Aug. 24 – 5 a.m. Wednesday, Aug. 26.”
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A full closure on I-405 will occur 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 4 a.m. Monday, Aug. 31. A signed detour will be in place.”
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SR 9 near Kalloch Road will be reduced to a single lane for 42 days until September 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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The fish passage construction on SR 9 will require alternating traffic through a bypass road until September 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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Additional alternating traffic on SR 9 will occur on weekdays through September 3No usable supporting receipt — unverified.
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I-5 northbound lane closures will occur from milepost 189 to 191“005: Nightly from 9 p.m. to 5 a.m. the next day beginning Monday, Aug. 24 to 5 a.m. Wednesday, Aug. 26, three left lanes of northbound Interstate 5 will close from State Route 526/State Route 527 (milepost 189) to Lowell Road (milepost 191) for maintenance.”
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Nightly I-5 northbound lane closures will occur from 9 p.m. to 5 a.m.No usable supporting receipt — unverified.
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The I-5 northbound lane closures will begin on August 24“005: Nightly from 9 p.m. to 5 a.m. the next day beginning Monday, Aug. 24 to 5 a.m. Wednesday, Aug. 26, three left lanes of northbound Interstate 5 will close from State Route 526/State Route 527 (milepost 189) to Lowell Road (milepost 191) for maintenance.”
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All closures are scheduled to end by the specified datesNo usable supporting receipt — unverified.