I-405 will have multiple closures starting Monday, Aug. 24. Northbound I-405 will close up to two lanes from milepost 0 to 1.5 nightly until Aug. 26. Southbound I-405's HOV lane will close nightly until Aug. 28. SR 9 near Kalloch Road will reduce to a single lane with alternating traffic until Sept. 14. The closures are for construction projects including fish passage work on SR 9 and pavement maintenance on I-405. Drivers should expect delays during the affected times. The SR 9 project includes alternating traffic on weekdays through Sept. 3. WSDOT advises travelers to plan ahead for the closures. The construction work is part of ongoing infrastructure maintenance and improvement efforts in the Tri-Cities area.
I-405 and SR 9 closures impact Tri-Cities traffic
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📄 Source: WSDOT — Highway Construction & Closures — https://wsdot.wa.gov/travel/road-construction
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- ✓I-405 will have multiple closures starting Monday, Aug. 24“405: Up to two lanes of northbound I-405 from I-5 (milepost 0) to milepost 1.5 will be closed nightly, 9 p.m. Monday, Aug. 24 – 5 a.m. Wednesday, Aug. 26. 405: The HOV lane of southbound I-405 from SR 181 (milepost 1) to I-5 (milepost 0) will be closed nightly, 9:30 p.m. Monday, Aug. 24 – 5 a.m. Friday, Aug. 28. 405: Nightly from 11:59 p.m. to 4 a.m. the next day beginning Monday, Aug. 24 to 4 a.m. Wednesday, Aug. 26, expect intermittent rolling slowdowns on both directions of Interstate 405 from Northeast 145th Street (milepost 21) to Coal Creek Parkway/Newport Way (milepost 10) for PSE utilities work. 405: From 9 p.m. Monday, Aug. 24, to 5 a.m. Tuesday, Aug. 25, two lanes of southbound I-405 will close between SR 520 and Northeast 12th Street for crack sealing and pavement repair.”
- ✓Northbound I-405 will close up to two lanes from milepost 0 to 1.5 nightly until Aug. 26“405: Up to two lanes of northbound I-405 from I-5 (milepost 0) to milepost 1.5 will be closed nightly, 9 p.m. Monday, Aug. 24 – 5 a.m. Wednesday, Aug. 26.”
- ✓Southbound I-405's HOV lane will close nightly until Aug. 28“405: The HOV lane of southbound I-405 from SR 181 (milepost 1) to I-5 (milepost 0) will be closed nightly, 9:30 p.m. Monday, Aug. 24 – 5 a.m. Friday, Aug. 28.”
- ✓SR 9 near Kalloch Road will reduce to a single lane with alternating traffic until Sept. 14“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 42 days, until Sept. 14 for fish passage construction.”
- ✓The closures are for construction projects including fish passage work on SR 9“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 42 days, until Sept. 14 for fish passage construction. Expect delays in the area.”
- ⚠The closures are for construction projects including pavement maintenance on I-405No usable supporting receipt — unverified.
- ✓Drivers should expect delays during the affected times“Expect delays in the area.”
- ✓The SR 9 project includes alternating traffic on weekdays through Sept. 3“009: Northbound and southbound traffic will alternate from 10 a.m. to 4 p.m. daily Mondays through Thursday through Thursday, Sept. 3, just south of Mount Vernon Big Lake Road (milepost 49) for fish passage construction. Expect delays in the area.”
- ⚠WSDOT advises travelers to plan ahead for the closuresNo usable supporting receipt — unverified.
- ⚠The construction work is part of ongoing infrastructure maintenance and improvement efforts in the Tri-Cities areaNo usable supporting receipt — unverified.
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