Infrastructure

I-405, I-90, SR 9 Closures Continue Through Sept. 4

Wednesday, September 2, 2026

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I-405 southbound lanes from milepost 12 to Coal Creek Parkway will close overnight Thursday, Sept. 3 through Friday, Sept. 4, according to WSDOT. Northbound I-405 will have lane closures nightly from milepost 7.5 to 8.5 and from milepost 11.5 to 13.7 through Sept. 4. I-90 eastbound off-ramp to Factoria Boulevard will close nightly through Sept. 4. SR 9 near Kalloch Road will remain reduced to a single lane with alternating traffic until Sept. 24 for fish passage construction. These closures affect daily commutes in the Centralia-Chehalis area. WSDOT states that signed detours will be in place for the I-90 off-ramp closure. The I-5 near Alger/Lake Samish Road will have reduced lanes nightly through Sept. 10 for fish passage construction. The US 101 Hoh River Bridge will close nightly from Sept. 14 to Sept. 22 for emergency repairs.

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

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I-405 southbound lanes from milepost 12 to Coal Creek Parkway will close overnight“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 I-405 southbound lanes will be from Thursday, Sept. 3 through 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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Northbound I-405 will have lane closures nightly from milepost 7.5 to 8.5No usable supporting receipt — unverified.
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Northbound I-405 will have lane closures nightly from milepost 11.5 to 13.7“405: Up to four lanes of northbound I-405 from milepost 11.5 to milepost 13.7 will be closed nightly, 9:30 p.m. Monday, Aug. 31 – 4:30 a.m. Friday, Sept. 4.”
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The lane closures on Northbound I-405 will be through 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-90 eastbound off-ramp to Factoria Boulevard will close nightly through Sept. 4“090: The eastbound I-90 off-ramp to Factoria Boulevard will be closed nightly, 9 p.m. Monday, Aug. 31 – 5 a.m. Friday, Sept. 4. A signed detour will be in place.”
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SR 9 near Kalloch Road will remain reduced to a single lane with alternating traffic until Sept. 24“009: SR 9 is reduced to a single lane near Kalloch Road (MP 59) with a signal alternating northbound and southbound traffic through a bypass road for 52 days, until Sept. 24 for fish passage construction.”
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The reduction of SR 9 to a single lane is for fish passage construction“009: SR 9 is reduced to a single lane near Kalloch Road (MP 59) with a signal alternating northbound and southbound traffic through a bypass road for 52 days, until Sept. 24 for fish passage construction.”
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The closures affect daily commutes in the Centralia-Chehalis areaNo usable supporting receipt — unverified.
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WSDOT states that signed detours will be in place for the I-90 off-ramp closure“090: The eastbound I-90 off-ramp to Factoria Boulevard will be closed nightly, 9 p.m. Monday, Aug. 31 – 5 a.m. Friday, Sept. 4. A signed detour will be in place.”
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The I-5 near Alger/Lake Samish Road will have reduced lanes nightly through Sept. 10“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 reduction of I-5 lanes is for fish passage construction“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 US 101 Hoh River Bridge will close nightly from Sept. 14 to Sept. 22“101: Travelers will need to prepare for overnight and around-the-clock closures at the US 101 Hoh River Bridge. From Monday, Sept. 14 to Tuesday, Sept. 22, each night from 10:30 p.m. to 5:30 a.m., the US 101 Hoh River Bridge will close to all traffic for <a href="https://wsdot.wa.gov/construction-planning/search-projects/us-101-hoh-river-bridge-emergency-repair">emergency repairs</a>.”
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The closure of US 101 Hoh River Bridge is for emergency repairs“Travelers will need to prepare for overnight and around-the-clock closures at the US 101 Hoh River Bridge. From Monday, Sept. 14 to Tuesday, Sept. 22, each night from 10:30 p.m. to 5:30 a.m., the US 101 Hoh River Bridge will close to all traffic for <a href="https://wsdot.wa.gov/construction-planning/search-projects/us-101-hoh-river-bridge-emergency-repair">emergency repairs</a>.”