Infrastructure

I-405, SR 525 closures continue through July 31

Saturday, August 1, 2026

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WSDOT announced several highway construction and closure updates for Pullman, WA, effective through July 31, 2026.

The northbound and southbound SR 527 on-ramp to northbound I-405 will close overnight from 11 p.m. Thursday, July 30 to 4:30 a.m. Friday, July 31. Additionally, up to two lanes of southbound I-405 between milepost 18.11 and milepost 16.45 will be closed nightly from 11 p.m. to 4 a.m. through Friday, July 31. State Route 525 will alternate traffic with flaggers near Admiral Drive (milepost 29) daily from 9 a.m. to 2:30 p.m., excluding Friday, Saturday, and Sunday, through September 16.

Residents should plan for travel disruptions on these routes during the specified times. WSDOT notes detours for some closures, including a detour via westbound I-90 to exit 20, High Point Way, then looping back to eastbound I-90 to exit 25 for the westbound I-90 ramp closure.

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

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WSDOT announced several highway construction and closure updates for Pullman, WANo usable supporting receipt — unverified.
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The updates are effective through July 31, 2026No usable supporting receipt — unverified.
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The northbound and southbound SR 527 on-ramp to northbound I-405 will close overnight“405: The northbound and southbound SR 527 on-ramp to northbound I-405 will be closed overnight from 11 p.m. Thursday, July 30 to 4:30 a.m. Friday, July 31.”
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The closure will be from 11 p.m. Thursday, July 30 to 4:30 a.m. Friday, July 31“405: The northbound and southbound SR 527 on-ramp to northbound I-405 will be closed overnight from 11 p.m. Thursday, July 30 to 4:30 a.m. Friday, July 31.”
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Up to two lanes of southbound I-405 between milepost 18.11 and milepost 16.45 will be closed nightly“405: Monday, July 27 to the morning of Friday, July 31: Up to two lanes of southbound I-405 between milepost 18.11 and milepost 16.45 will be closed, nightly from 11 p.m. – 4 a.m.”
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The closure will be from 11 p.m. to 4 a.m.No usable supporting receipt — unverified.
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The closure will be through Friday, July 31“Effective: Jul 31, 2026, 4:00 AM”
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State Route 525 will alternate traffic with flaggers near Admiral Drive (milepost 29) daily“525: Daily from 9 a.m. to 2:30 p.m. (excluding Friday, Saturday, Sunday) beginning Monday, July 13 until Friday, Sept. 16, State Route 525 traffic will alternate with flaggers near Admiral Drive (milepost 29) for utilities work.”
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The traffic alternation will be from 9 a.m. to 2:30 p.m.“525: Daily from 9 a.m. to 2:30 p.m. (excluding Friday, Saturday, Sunday) beginning Monday, July 13 until Friday, Sept. 16, State Route 525 traffic will alternate with flaggers near Admiral Drive (milepost 29) for utilities work.”
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The traffic alternation will exclude Friday, Saturday, and SundayNo usable supporting receipt — unverified.
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The traffic alternation will be through September 16No usable supporting receipt — unverified.
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Residents should plan for travel disruptions on these routes during the specified timesNo usable supporting receipt — unverified.
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WSDOT notes detours for some closures“Detour via westbound I-90 to exit 20, High Point Way, then loop back to eastbound I-90 to exit 25, SR 18/Snoqualmie Pkwy.”
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A detour via westbound I-90 to exit 20, High Point Way, then looping back to eastbound I-90 to exit 25 is included for the westbound I-90 ramp closure“Detour via westbound I-90 to exit 20, High Point Way, then loop back to eastbound I-90 to exit 25, SR 18/Snoqualmie Pkwy.”