Thurston County construction and travel updates

Thurston County

  • Sign up for email updates for major roadwork on state highways in Thurston County. 


I-5 - SR 510 Interchange - Reconstruct Interchange
I-5 Region: Olympic County: Thurston Location: Milepost(s) 110 to 112.5
Contact: Doug Adamson, 360-357-2716
Description: Crews have upgraded the Marvin Road overpass into a diverging diamond interchange. Users of this interchange are strongly encouraged to sign up for email updates and see more at the project webpage.

Expect heavy congestion, consider alternative routes as construction continues

  • The Marvin Road overpass has been converted into a diverging diamond interchange. 
  • Travelers are encouraged to follow the signs, lines and traffic signals as traffic is briefly directed to the left side of the overpass before taken back to the right.
  • While WSDOT will keep people moving, travelers can expect continued congestion. Crews must continue additional work before the interchange is complete. Added congestion due to around-the-clock lane closures could continue into mid-September. Go early or late in the day, consolidate trips, or use alternative routes. 

Highway: US 12 Region: Olympic County: Thurston Location: Milepost(s) 38.8
Contact: John Romero, 360-570-6750
Description: Crews will build a modern roundabout at the intersection of US 12 and Anderson Road. Travelers will keep moving with a single-lane of alternating traffic with temporary traffic signals and a reduced speed limit. 
Work Schedule: See below: 

  • Travelers using the intersection of US 12 and Anderson Road Southwest near Oakville will see a temporary traffic signal. The new temporary traffic signal will help keep traffic moving around the clock as crews build the new roundabout.
  • The US 12 speed limit approaching the work zone is reduced to 25 MPH. Travelers are encouraged to watch their speeds and give crews the room they need to work.

Highway: US 101 Region: Olympic County: Thurston Location: Milepost(s) 366.1 - 365.9
Contact: Jeff Hastings, 253-983-7550
Description: Northbound shoulder closure for storm pond maintenance. 
Work Schedule: 7:30 a.m. until 3:30 p.m. Wednesday and Thursday, Aug. 5-6.

Highway: I-5 Region: Olympic County: Thurston Location: Milepost(s) 109.7
Contact: Jeff Hastings, 253-983-7550
Description: Northbound left lane closure for barrier repair.  
Work Schedule: 1 a.m. to 5 a.m. Monday, Aug. 10. 

Highway: I-5 Region: Olympic County: Thurston Location: Milepost(s) 113.3
Contact: Jeff Hastings, 253-983-7550
Description: Southbound left lane closure for barrier repair.  
Work Schedule: 1 a.m. to 5 a.m. Monday, Aug. 10. 

Highway: SR 510 Region: Olympic County: Thurston Location: Milepost(s) 9 to 9.3
Contact: Chris Ehresmann, 360-570-6749 
Description: Shoulder closure in both directions for utility crews conducting vegetation management.   
Work Schedule:  8 a.m. until 3 p.m. Tuesday, Aug. 11.