Thurston County construction and travel updates

Thurston County

View 2018-2019 Thurston County construction map (pdf 268 kb)


I-5 - SR 510 Interchange - Reconstruct Interchange
I-5 Region: Olympic County: Thurston Location: Milepost(s) 111
Contact: Doug Adamson, 360-357-2716
Description: Crews will transform the existing interchange into a diverging diamond interchange. All users of this interchange are strongly encouraged to sign up to receive WSDOT email updates.

  • The first phase of work is to demolish a segment of the overpass and preliminary work associated with the new frontage road north of I-5.
  • I-5: Drivers can expect night lane closures and around-the-clock shoulder closures. Crews on occasion will detour I-5 traffic through the Marvin Road on- and off-ramps.
  • Marvin Road: Drivers can expect night lane closures, around-the-clock shoulder closures and narrowed lanes. When the weather cooperates, the northbound Marvin Road overpass sidewalk (on the east side of the bridge nearest to Nisqually) will close until further notice to pedestrians. Pedestrians will detour via the west sidewalk (nearest to Olympia). Please note the same sidewalk will also close to bicyclists. Bicyclists can use the full lane of Marvin Road or use the pedestrian detour.

SR 510 - Meridian Rd SE - Roundabout and Paving
SR 510 Region: Olympic County: Thurston Location: Milepost(s) 6.9 to 7
Contact: Doug Adamson, 360-357-2716
Description: Crews will build a modern roundabout at the intersection of State Route 510 and Meridian Road Southeast.
Work Schedule: Construction will continue through summer. Crews initially will do most of the work just off the highway to reduce traffic disruption.



Highway: I-5 Region: Olympic County: Thurston Location: Milepost(s) 104
Contact: Jeff Hastings, 253-983-7550 
Description: Expected inclement weather has crews rescheduling extensive vegetation work that had been scheduled to occur this weekend. Weather permitting, the work will now occur over the weekend of March 2-3. 
Work Schedule:  7 a.m. to 3:30 p.m. Saturday and Sunday, March 2-3.

Highway: SR 121 Region: Olympic County: Thurston Location: Milepost(s) 6.7 to 7.2
Contact: Chris Ehresmann, 360-570-6749
Description: One-way alternating traffic while utility crews replace communication lines. 
Work Schedule:  8 a.m. to 4:30 p.m. each weekday from Thursday, Feb. 21 through Thursday, Feb. 28.

Highway: SR 507 Region: Olympic County: Thurston Location: Milepost(s) 5.4 to 13.1
Contact: Chris Ehresmann, 360-570-6749
Description: One-way alternating traffic while utility crews will conduct tree trimming. 
Work Schedule:  8 a.m. to 3:30 p.m. each weekday through Friday, March 15. No work on President's Day, Monday, Feb. 18.