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Infrastructure

I-405, I-5 Closures Set for Week

Wednesday, September 2, 2026

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Washington State Department of Transportation (WSDOT) will implement multiple highway closures affecting Puyallup residents starting August 31. Southbound I-405 will close from milepost 12 to Coal Creek Parkway Southeast from 9 p.m. Thursday, Sept. 3 to 5 a.m. Friday, Sept. 4. Northbound I-405 will have nightly closures from 9 p.m. Monday, Aug. 31 to 4:30 a.m. Friday, Sept. 4. I-5 will reduce to single lanes nightly near Alger/Lake Samish Road (exit 240) from 8 p.m. to 5 a.m. Monday through Friday.

WSDOT states these closures are for construction projects including fish passage work on I-5 and utility work on I-405. The I-5 closures near exit 240 will continue until September 10, while most I-405 closures end September 4. Drivers should expect delays and follow detour signs. WSDOT provides project details at wsdot.wa.gov.

The closures affect Puyallup commuters traveling to Tacoma, Seattle, and surrounding areas. Residents using these highways for daily commutes should plan for extended travel times during the specified hours. WSDOT recommends checking real-time traffic conditions before traveling.

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

Source receipts8 of 17 claims supported · 47%

Legacy automated check: the original source text was not preserved. These earlier verdicts have not passed the current publication checks and may contain errors. Source: original document ↗

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Washington State Department of Transportation (WSDOT) will implement multiple highway closures affecting Puyallup residents starting August 31No usable supporting receipt — unverified.
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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 start on Thursday, Sept. 3No usable supporting receipt — unverified.
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The closure of Southbound I-405 will end on 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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Southbound I-405 will close from 9 p.m. to 5 a.m.No usable supporting receipt — unverified.
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Northbound I-405 will have nightly closures from 9 p.m. Monday, Aug. 31 to 4:30 a.m. Friday, Sept. 4“405: Up to two lanes of northbound I-405 from milepost 7 to milepost 8.5 will be closed nightly, 9 p.m. Monday, Aug. 31 – 4:30 a.m. Friday, Sept. 4.”
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I-5 will reduce to single lanes nightly near Alger/Lake Samish Road (exit 240)“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 single lane reduction on I-5 will start at 8 p.m.“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 single lane reduction on I-5 will end at 5 a.m.“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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The single lane reduction on I-5 will occur Monday through FridayNo usable supporting receipt — unverified.
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I-5 closures near exit 240 will continue until September 10No usable supporting receipt — unverified.
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Most I-405 closures will end September 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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Drivers should expect delays and follow detour signsNo usable supporting receipt — unverified.
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WSDOT provides project details at wsdot.wa.gov“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 closures affect Puyallup commuters traveling to Tacoma, Seattle, and surrounding areasNo usable supporting receipt — unverified.
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Residents using these highways for daily commutes should plan for extended travel times during the specified hoursNo usable supporting receipt — unverified.
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WSDOT recommends checking real-time traffic conditions before travelingNo usable supporting receipt — unverified.