Supplemental Environmental Assessment available for review, comment
WSDOT, YELM — People can learn more about the next steps in the Washington State Department of Transportation’s State Route 510, Yelm Loop project via an online open house.
The project will build the remaining 3 miles of State Route 510 between Cullens Road and SR 507. The proposed two-lane roadway includes a path for people who walk and bike.

The $58.6 million project is expected to begin construction summer 2023 and be completed early fall 2025.
Yelm Loop completion open house information
When: Tuesday, June 1, to Thursday, July 1
Where: Engage.wsdot.wa.gov
Details: The online open house will detail:
- The proposed project
- Reasons behind the project
- Timeline and next steps
How to commentPeople can provide feedback to the supplemental environmental assessment via the online open house comment form. To receive a digital or paper copy of the supplemental environmental assessment, or leave a comment or message, call 360-570-6699.
Free Wi-Fi access is available through the Timberland Regional Library for people who wish to participate in the online open house or comment. Additional WiFi Hotspots are available via the Washington State Department of Commerce website.
Hyperlinks within the release:
- Yelm Loop project: wa.gov/Projects/SR510/YelmLoopNewAlignPh2/home
- Online open house: engage.wsdot.wa.gov
- Timberland Regional Library: trl.org/how/access-wi-fi
- Washington State Department of Commerce: commerce.wa.gov/building-infrastructure/washington-state-drive-in-wifi-hotspots-location-finder/