SR 9 Fish Passage Work Begins, I-5 Closures Planned

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  WSDOT announced several road closures and lane reductions effective August 22, 2026No usable supporting receipt — unverified.
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  SR 9 near Kalloch Road (MP 59) will be reduced to a single lane with alternating traffic through a bypass 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. Expect delays in the area.”
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  The bypass for SR 9 near Kalloch Road (MP 59) will be in place 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. Expect delays in the area.”
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  Another section of SR 9 south of Mount Vernon Big Lake Road (MP 49) will alternate traffic dailyNo usable supporting receipt — unverified.
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  The traffic alternation on SR 9 south of Mount Vernon Big Lake Road (MP 49) will occur from 10 a.m. to 4 p.m.“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 traffic alternation on SR 9 south of Mount Vernon Big Lake Road (MP 49) will continue until September 3“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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  I-5 will have nightly lane closures from August 24 to 26No usable supporting receipt — unverified.
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  The SR 9/SR 204 roundabout will close from 8 p.m. Saturday to 6 a.m. Sunday“204: The SR 9/SR 204 roundabout will close from 8 p.m. Saturday, Aug. 22, to 6 a.m. Sunday, Aug. 23, for rechannelization. Local business access will remain open. All other traffic should detour using Market Place and Lundeen Parkway.”
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  Additional I-405 closures are scheduled for pavement repairs between August 24 and 25“405: From 9 p.m. Monday, Aug. 24, until 5 a.m. Tuesday, Aug. 25, two lanes of southbound I-405 will close between SR 520 and NE 14th Street for pavement repair and crack sealing. Expect delays through the work zone.”
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  All closures are posted with specific dates, times, and detour information on WSDOT's websiteNo usable supporting receipt — unverified.