I-405, SR 20 closures this week

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  Up to two lanes of southbound I-405 will close from milepost 12 to Coal Creek Parkway Southeast“405: 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 closure of southbound I-405 will occur from 9 p.m. Thursday, Sept. 3 to 5 a.m. Friday, Sept. 4“405: 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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  Northbound I-405 will close 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 of northbound I-405 will occur from 11 p.m. Friday, Aug. 28 to 5 a.m. Monday, Aug. 31“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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  State Route 20 will alternate traffic daily except weekends from Swin Slough Bridge to Laconner Whitney Road/Bay View Road“020: 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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  State Route 20 will alternate traffic from Alfred Street to SR 530 from Aug. 31 to Sept. 3“020: Daily from 7 a.m. to 3 p.m. beginning Monday, Aug. 31 to Wednesday, Sept. 3, State Route 20 traffic will alternate with flaggers from Alfred Street to State Route 530/East Sauk Road (milepost 97) for utilities work.”
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  SR 9 will alternate traffic north of SR 542/Nugents Corner roundabout on Aug. 31“009: Northbound and southbound traffic will alternate north of the SR 542/Nugents Corner roundabout (milepost 84) from 6 a.m. to 6 p.m. Monday, Aug. 31 for paving work. Expect delays in the area. This work is part of a project <a href="https://wsdot.wa.gov/construction-planning/search-projects/sr-9-park-road-vicinity-and-sr-547-saar-creek-sumas-river-paving">repaving sections of SR 9 and SR 547</a> in Whatcom County.”
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  SR 9 will alternate traffic south of Mount Vernon Big Lake Road through Sept. 3No usable supporting receipt — unverified.
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  WSDOT says the SR 9 paving work may be rescheduled if weather is wet“This work is part of a project <a href="https://wsdot.wa.gov/construction-planning/search-projects/sr-9-park-road-vicinity-and-sr-547-saar-creek-sumas-river-paving">repaving sections of SR 9 and SR 547</a> in Whatcom County. Effective: Aug 28, 2026, 10:56 AM Expected end: Sep 1, 2026, 6:00 PM 009: Northbound and southbound traffic will alternate north of the SR 542/Nugents Corner roundabout (milepost 84) from 6 a.m. to 6 p.m. Monday, Aug. 31 for paving work. Expect delays in the area. This work needs dry weather and may be rescheduled to Tuesday, Sept. 1.”
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  SR 165 will have pavement repairs on Sunday, Aug. 30“165: From 7 a.m. to 3:30 p.m. Sunday, Aug. 30, expect occasional one-way alternating traffic and stops of up to 5 minutes on SR 165 near the SR 162 junction for pavement repairs.”
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  Drivers should expect delays and use detours where provided“Expect delays in the area.”