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WSDOT announced several road closures affecting Olympic Peninsula highwaysNo usable supporting receipt — unverified.
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The road closures will start on August 30No usable supporting receipt — unverified.
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Northbound I-405 will close from 11 p.m. Friday, August 28“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 Northbound I-405 closure will end at 5 a.m. Monday, August 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.
Effective: Aug 24, 2026, 12:00 AM
Expected end: Aug 31, 2026, 5:00 AM”
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The Northbound I-405 closure will be between Northeast 85th Street and 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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Southbound I-405 will close overnight on September 3-4“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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The Southbound I-405 closure will be between mileposts 12 and 10“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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I-5 will see single-lane reductions nightly from August 31 through September 4“005: The northbound and southbound I-5 will be reduced to a single lane from 8 p.m. to 5 a.m. nightly Monday, Aug. 31, through Friday morning, Sept. 4, near Alger/Lake Samish Road (exit 240) for fish passage construction.”
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The I-5 single-lane reductions will be near Alger/Lake Samish Road“005: The northbound and southbound I-5 will be reduced to a single lane from 8 p.m. to 5 a.m. nightly Monday, Aug. 31, through Friday morning, Sept. 4, near Alger/Lake Samish Road (exit 240) for fish passage construction.”
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The I-5 single-lane reductions will be north of North Lake Samish“005: The left lane of northbound I-5 will close from 8 p.m. to 5 a.m. nightly Sunday, Aug. 30, through Friday morning, Sept. 4, north of North Lake Samish (exit 246) for fish passage construction.”
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SR 20 will alternate traffic with flaggers daily (except weekends)“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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The SR 20 traffic alternation will be from Swin Slough Bridge to Laconner Whitney 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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SR 4 will close one lane daily between 50th and 42nd Avenues“004: Monday, Aug. 17 through Friday, Sept. 11: A single lane in both directions of SR 4 between 50th Avenue (milepost 56.4) and 42nd Avenue (milepost 57.2) will be closed weekdays from 7:30 a.m. to 5 p.m., for buried gas main line extension work.”
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The SR 4 closure will be from August 17 through September 11“004: Monday, Aug. 17 through Friday, Sept. 11: A single lane in both directions of SR 4 between 50th Avenue (milepost 56.4) and 42nd Avenue (milepost 57.2) will be closed weekdays from 7:30 a.m. to 5 p.m., for buried gas main line extension work.”
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SR 99 will close a right laneNo usable supporting receipt — unverified.
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The SR 99 closure will be from August 31 to September 1“099: From 8 p.m. Monday, Aug. 31 to Tuesday, Sept. 1, the right lane of State Route 99 from Russell Way/North Manor Way to Gibson Road (milepost 51) will close for utilities work.”
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SR 730 will have alternating traffic Mondays through Fridays“730: SR 730 between the Jct. of US 12 and the Oregon State Line milepost 0 to 6: Monday through Friday from 6 a.m. to 6 p.m. until further notice, there will be flagger and pilot vehicle controlled alternating traffic for roadwork.”
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The SR 730 alternating traffic will continue until September 18“730: SR 730 between the Jct. of US 12 and the Oregon State Line milepost 0 to 6: Monday through Friday from 6 a.m. to 6 p.m. until further notice, there will be flagger and pilot vehicle controlled alternating traffic for roadwork.
Effective: Jun 7, 2026, 9:48 PM
Expected end: Sep 18, 2026, 6:00 PM”
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Residents should plan for delays during peak travel timesNo usable supporting receipt — unverified.
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WSDOT recommends checking the project webpage for updates on I-5 fish passage construction“More information on the <a href="https://wsdot.wa.gov/construction-planning/search-projects/i-5-tributaries-friday-lake-chuckanut-creeks-fish-passage">project webpage</a>.”
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The agency states that signed detours will be in place for the I-405 closure“A signed detour will be in place.”
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Work zones will have flaggers directing traffic“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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The closures will impact commutersNo usable supporting receipt — unverified.
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The closures will impact emergency servicesNo usable supporting receipt — unverified.
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The closures will impact commercial vehicles traveling through the regionNo usable supporting receipt — unverified.