Infrastructure

I-5 Fish Passage Construction Affects Multiple Lanes

Tuesday, September 8, 2026

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WSDOT announced multiple lane closures on I-5 and State Route 11 for fish passage construction through September 13.

Northbound I-5 will close one lane from Alabama Street to State Route 539 from 9 p.m. Saturday, Sept. 12 to 4 a.m. Sunday, Sept. 13. Other closures include a single lane reduction on I-5 north of North Lake Samish from 8 p.m. to 5 a.m. nightly through Sept. 10, and a southbound I-5 off-ramp closure at exit 240 from 8 p.m. to 5 a.m. nightly through Sept. 10.

The project aims to install new fish passable structures near Chuckanut Creek and Lake Samish, with work expected to continue through October 31, 2026. Drivers are advised to allow extra travel time during these closures.

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

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WSDOT announced multiple lane closures on I-5 and State Route 11 for fish passage construction through September 13“005 [1 mi from Bellingham]: From 9 p.m. Saturday, Sept. 12 to 4 a.m. Sunday, Sept. 13, the right lane of northbound Interstate 5 will close from Alabama Street (milepost 254) to State Route 539/Guide Meridian (milepost 256) for maintenance.”
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Northbound I-5 will close one lane from Alabama Street to State Route 539 from 9 p.m. Saturday, Sept. 12 to 4 a.m. Sunday, Sept. 13“005 [1 mi from Bellingham]: From 9 p.m. Saturday, Sept. 12 to 4 a.m. Sunday, Sept. 13, the right lane of northbound Interstate 5 will close from Alabama Street (milepost 254) to State Route 539/Guide Meridian (milepost 256) for maintenance.”
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Other closures include a single lane reduction on I-5 north of North Lake Samish from 8 p.m. to 5 a.m. nightly through Sept. 10“Northbound I-5 will be reduced to a single lane from 8 p.m. to 5 a.m. nightly Tuesday, Sept. 8, through Thursday morning, Sept. 10, north of North Lake Samish (exit 246) for fish passage construction.”
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A southbound I-5 off-ramp closure at exit 240 from 8 p.m. to 5 a.m. nightly through Sept. 10“The southbound I-5 off-ramp to Alger/Lake Samish Road (exit 240) will close from 8 p.m. to 5 a.m. nightly Tuesday, Sept. 8, to Thursday morning, Sept. 10, for fish passage construction. Detour using the Nulle Road off-ramp (exit 242).”
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The project aims to install new fish passable structures near Chuckanut Creek and Lake Samish“Northbound and southbound I-5 will use temporary, two-lane bypass roads near Chuckanut Creek (milepost 247) south of Bellingham around the clock through October. With traffic off I-5, crews will install new fish passable structures. An advisory speed limit of 50 mph is set through the work zones.”
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Work is expected to continue through October 31, 2026“Effective: Jun 18, 2026, 5:00 AM Expected end: Oct 31, 2026, 1:47 PM”
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Drivers are advised to allow extra travel time during these closuresNo usable supporting receipt — unverified.