I-5, SR 525, SR 9, I-405 to have lane closures

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  WSDOT announced lane closures on I-5, SR 525, SR 9, and I-405 starting this weekend through October 30“005 [4 mi from Everett]: From 5:30 to 10:30 a.m. Saturday, Sept. 19, the left lane of northbound Interstate 5 from the State Route 529 Steamboat Slough bridge to the Ebey Slough bridge (milepost 198) will close for maintenance. From 5:30 to 11:30 a.m. Sunday, Sept. 20, the right lane of southbound I-5 from the Ebey Slough bridge to the SR 529 Steamboat Slough bridge will close.”
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  The left lane of northbound I-5 from SR 529 Steamboat Slough bridge to Ebey Slough bridge (milepost 198) will close from 5:30 a.m. to 10:30 a.m.“From 5:30 to 10:30 a.m. Saturday, Sept. 19, the left lane of northbound Interstate 5 from the State Route 529 Steamboat Slough bridge to the Ebey Slough bridge (milepost 198) will close for maintenance.”
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  The closure of the left lane of northbound I-5 is on Saturday, Sept. 19“From 5:30 to 10:30 a.m. Saturday, Sept. 19, the left lane of northbound Interstate 5 from the State Route 529 Steamboat Slough bridge to the Ebey Slough bridge (milepost 198) will close for maintenance.”
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  The right lane of southbound I-5 from Ebey Slough bridge to SR 529 will close from 5:30 a.m. to 11:30 a.m.“From 5:30 to 11:30 a.m. Sunday, Sept. 20, the right lane of southbound I-5 from the Ebey Slough bridge to the SR 529 Steamboat Slough bridge will close.”
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  The closure of the right lane of southbound I-5 is on Sunday, Sept. 20“From 5:30 to 11:30 a.m. Sunday, Sept. 20, the right lane of southbound I-5 from the Ebey Slough bridge to the SR 529 Steamboat Slough bridge will close.”
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  On SR 525 in Mukilteo, nightly traffic alternates from 9 p.m. to 7 a.m.“Nightly, from 9 p.m. until 7 a.m. Sunday nights through Friday mornings, contractor crews will alternate traffic through the intersections of State Route 525 in Mukilteo between Paine Field and the Mukilteo Ferry Terminal for pedestrian upgrades. Pedestrians may need to use local roads to detour around the work zone.”
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  The nightly traffic alternation on SR 525 in Mukilteo is from Sunday through FridayNo usable supporting receipt — unverified.
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  The nightly traffic alternation on SR 525 in Mukilteo ends on Oct. 30“Effective: Aug 10, 2026, 1:29 PM Expected end: Oct 30, 2026, 7:00 AM”
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  SR 9 will have lane shifts from 9 p.m. Thursday to 5 a.m. Friday“From 9 p.m. Thursday, Sept. 17 to 5 a.m. Friday, Sept. 18, the right lane of southbound State Route 9 from 184th Street Southeast to 180th Street Southeast (milepost 3) will close with a lane shift for utilities work.”
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  The lane shifts on SR 9 near 184th Street and Harvey Creek Road are from Sept. 17-18“From 9 p.m. Thursday, Sept. 17 to 5 a.m. Friday, Sept. 18, the right lane of southbound State Route 9 from 184th Street Southeast to 180th Street Southeast (milepost 3) will close with a lane shift for utilities work.”
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  I-405 ramps at Northeast 85th Street will close from 10 p.m. Friday, Sept. 18“The northbound/southbound I-405 on-/off-ramps at Northeast 85th Street (Exit 18) will close day and night from 10 p.m. Friday, Sept. 18 to 5 a.m. Monday, Sept. 21. Detours will be in place.”
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  The closure of I-405 ramps at Northeast 85th Street ends on 5 a.m. Monday, Sept. 21“Effective: Sep 11, 2026, 12:00 AM Expected end: Sep 21, 2026, 5:00 AM”
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  Detours will be in place for I-405 closures“Detours will be in place.”
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  WSDOT says the closures are for maintenance, pedestrian upgrades, and utility work“005 [4 mi from Everett]: From 5:30 to 10:30 a.m. Saturday, Sept. 19, the left lane of northbound Interstate 5 from the State Route 529 Steamboat Slough bridge to the Ebey Slough bridge (milepost 198) will close for maintenance. From 5:30 to 11:30 a.m. Sunday, Sept. 20, the right lane of southbound I-5 from the Ebey Slough bridge to the SR 529 Steamboat Slough bridge will close.”
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  Residents should expect delays and use detours when availableNo usable supporting receipt — unverified.
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  The I-5 closures end on Sept. 20“Effective: Sep 11, 2026, 4:05 PM Expected end: Sep 20, 2026, 11:30 AM”
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  The SR 525 and SR 203 work continues through Oct. 30“525 [6 mi from Everett]: Nightly, from 9 p.m. until 7 a.m. Sunday nights through Friday mornings, contractor crews will alternate traffic through the intersections of State Route 525 in Mukilteo between Paine Field and the Mukilteo Ferry Terminal for pedestrian upgrades. Pedestrians may need to use local roads to detour around the work zone. Effective: Aug 10, 2026, 1:29 PM Expected end: Oct 30, 2026, 7:00 AM 203 [14 mi from Everett]: From 7 p.m. to 6 a.m. Sunday nights through Friday mornings crews will alternate traffic with flaggers and pilot cars in sections between a nearly 11-mile stretch of SR 203, just south of Duvall to the Monroe city limits (mileposts 12.53 to 23.20). Effective: Aug 3, 2026, 12:19 PM Expected end: Oct 30, 2026, 6:00 AM”