Infrastructure

SR 4, 529, 169, 405, 161, 090, 529, 096 work zones active

Monday, August 17, 2026

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Starting Monday, Aug. 17, drivers on State Route 4 between Bunker Hill Road (milepost 49) and Coal Creek Slough (milepost 54. 9) will encounter single-lane traffic with flaggers directing movement daily from 8 a.m. to 2 p.m. for pavement repair work, with delays expected up to 20 minutes.

State Route 529 will have multiple lane closures, including a left lane closure on the southbound Snohomish River Bridge (milepost 4) daily from 9 a.m. to 2:30 p.m. through Thursday, Aug. 20, and additional right lane closures on northbound and southbound lanes on Tuesday, Aug. 18.

SR 169 in Black Diamond will remain closed for 35 days beginning Monday, Aug. 17, for fish barrier removal, with detours in place for through traffic. The HOV lane on northbound I-405 will be closed nightly from 8:45 p.m. to 5 a.m. through Wednesday, Aug. 19, and SR 161 will have ongoing lane closures through September 2026 for fish barrier removal on Hylebos Creek tributaries.

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

Checked against the public record15 of 15 claims · 100%

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

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Drivers on State Route 4 will encounter single-lane traffic starting Monday, Aug. 17“004: Monday, Aug. 17 to Wednesday, Aug. 19: Travelers in both directions of SR 4 will take turns moving through a single lane between Bunker Hill Road (milepost 49) and Coal Creek Slough (milepost 54.9), daily from 8 a.m. to 2 p.m., for pavement repair work.”
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The single-lane traffic on State Route 4 will be between Bunker Hill Road (milepost 49) and Coal Creek Slough (milepost 54. 9)“004: Monday, Aug. 17 to Wednesday, Aug. 19: Travelers in both directions of SR 4 will take turns moving through a single lane between Bunker Hill Road (milepost 49) and Coal Creek Slough (milepost 54.9), daily from 8 a.m. to 2 p.m., for pavement repair work.”
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Flaggers will direct movement daily on State Route 4 from 8 a.m. to 2 p.m.“Flaggers will direct travelers to follow a pilot car through the work zone. Plan ahead and expect delays of up to 20 minutes.”
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Pavement repair work will cause delays up to 20 minutes on State Route 4“Travelers in both directions of SR 4 will take turns moving through a single lane between Bunker Hill Road (milepost 49) and Coal Creek Slough (milepost 54.9), daily from 8 a.m. to 2 p.m., for pavement repair work. Flaggers will direct travelers to follow a pilot car through the work zone. Plan ahead and expect delays of up to 20 minutes.”
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State Route 529 will have multiple lane closures“529: Daily from 9 a.m. to 2:30 p.m. beginning Tuesday, Aug. 18 to 2:35 p.m. Thursday, Aug. 20, the left lane of the southbound SR 529 Snohomish River Bridge (milepost 4) will close for maintenance.”
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A left lane closure on the southbound Snohomish River Bridge (milepost 4) will be daily from 9 a.m. to 2:30 p.m.“529: Daily from 9 a.m. to 2:30 p.m. beginning Tuesday, Aug. 18 to 2:30 p.m. Thursday, Aug. 20, the left lane of the southbound SR 529 Snohomish River Bridge (milepost 4) will close for maintenance.”
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The left lane closure on the southbound Snohomish River Bridge (milepost 4) will be through Thursday, Aug. 20“529: Daily from 9 a.m. to 2:30 p.m. beginning Tuesday, Aug. 18 to 2:30 p.m. Thursday, Aug. 20, the left lane of the southbound SR 529 Snohomish River Bridge (milepost 4) will close for maintenance.”
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Additional right lane closures on northbound and southbound lanes will occur on Tuesday, Aug. 18“529: From 8 to 10 a.m. Tuesday, Aug. 18, the right lane of northbound State Route 529 will close from East Marine View Drive to Ross Avenue (milepost 4) for maintenance. From noon to 2 p.m., the right lane of southbound SR 529 in this area will close.”
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SR 169 in Black Diamond will remain closed for 35 days beginning Monday, Aug. 17“Starting Monday, Aug. 17, both directions of SR 169 in Black Diamond are closed between Southeast 332nd Street and Plass Road for 35 days for fish barrier removal.”
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The closure of SR 169 in Black Diamond is for fish barrier removal“Starting Monday, Aug. 17, both directions of SR 169 in Black Diamond are closed between Southeast 332nd Street and Plass Road for 35 days for fish barrier removal.”
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Detours will be in place for through traffic on SR 169 in Black Diamond“Separate signed detours will guide passenger vehicles and freight vehicles around the closure.”
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The HOV lane on northbound I-405 will be closed nightly from 8:45 p.m. to 5 a.m.“405: The HOV lane of northbound I-405 from Sunset Boulevard Northeast / SR 900 (milepost 5.5) to milepost 6 will be closed nightly, 8:45 p.m. Monday, Aug. 17 – 5 a.m. Wednesday, Aug. 19.”
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The HOV lane closure on northbound I-405 will be through Wednesday, Aug. 19“405: The HOV lane of northbound I-405 from Sunset Boulevard Northeast / SR 900 (milepost 5.5) to milepost 6 will be closed nightly, 8:45 p.m. Monday, Aug. 17 – 5 a.m. Wednesday, Aug. 19.”
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SR 161 will have ongoing lane closures through September 2026“161: The right lane on northbound and southbound SR 161 is closed around the clock between South 370th Street and Military Road through Sept. 2026 for fish barrier removal on three Hylebos Creek tributaries. One lane will remain open in each direction.”
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The lane closures on SR 161 are for fish barrier removal on Hylebos Creek tributaries“The right lane on northbound and southbound SR 161 is closed around the clock between South 370th Street and Military Road through Sept. 2026 for fish barrier removal on three Hylebos Creek tributaries.”