Thurston County construction and travel updates

Thurston County

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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 are converting the existing interchange into a diverging diamond interchange. Depending on the weather, the work could be complete by late 2020. All users of this interchange are strongly encouraged to sign up to receive WSDOT email updates and see more at the project webpage.


  • Single-lane closure for northbound I-5 exit to Marvin Road. One lane will remain open.

9 p.m. Wednesday and Thursday, Feb. 12-13 to 5 a.m. each following day

  • Southbound I-5 exit to Marvin Road ( SR 510 will close)

9 p.m. Friday, Feb. 21 to 5 a.m. Monday, Feb. 24

  • ​Crews will close the Marvin Road on-ramp to southbound I-5 to all travelers around-the-clock for the entire weekend. Signed detours will be provided. This would is weather-dependent and could be rescheduled. 

I-5/I-5 Over Pacific Avenue - Seismic Retrofit
I-5 Region: Olympic County: Thurston Location: Milepost(s) 107
Contact: Brian Whitehouse, 360-412-3420
Description: This project is intended to help reduce potential damage in the event of an earthquake by strengthening four columns that support bridged sections of I-5. This project is part of WSDOT’s seismic retrofit program established to help make bridges less susceptible to earthquake related damage.
Work Schedule: See below: 

Around the clock:
Eastbound Pacific Avenue is reduced to one lane approaching the overpass. One sidewalk is closed around the clock. One sidewalk remains open for pedestrians and bicyclists. 

I-5 - Olympia Area Southbound - Congestion Management
I-5 Region: Olympic County: Thurston Location: Milepost(s) 109 to 105
Contact: Doug Adamson, 360-357-2716
Description: Shoulder closures at four on-ramps to southbound I-5 between Martin Way in Lacey and Henderson Boulevard in Olympia. WSDOT will activate the ramp meters during late winter./early spring. Project web page
Work Schedule: 7 a.m. to 4 p.m. each weekday through Friday, Feb. 14.

Highway: SR 507 Region: Olympic County: Thurston Location: Milepost(s) 20.2 to 20.6
Contact: Tony Kilmer, 360-357-2600
Description: One-way alternating traffic for bridge inspection.  
Work Schedule: 9 a.m. to 3 p.m. Tuesday, Feb 18.