Online open house launches March 14 for I-5 from Tumwater in Thurston County to Mounts Road in Pierce County

Study focuses on corridor planning and environmental conditions

LACEY – Community members have an opportunity to provide feedback on strategies aimed at improving commutes and environmental conditions through the Interstate 5 corridor in Thurston and Pierce Counties.

The Washington State Department of Transportation has created an online open house focusing on operations and intersection improvements on and off I-5 from Exit 99 in Tumwater to Exit 116 in DuPont. The strategies are a result of the Planning and Environmental Linkages study.

Participants of the online open house will view strategies that include potential projects to widen I-5 and increase vehicle capacity and multimodal opportunities. There are also strategies aimed at improving resiliency on outlying state highways in the event of a closure on I-5.

Feedback will be accepted starting today, Monday, March 14, through Monday, March 28.

I-5 Tumwater to Mounts Road Corridor Planning and Environmental Linkages Study Online Open House Information


Monday, March 14, to Monday, March 28, 2022



Participants will learn about the strategies evaluated, recommendations, and next steps.

Access for participation

Free Wi-Fi access is available through the Timberland Regional Library and Pierce County Library systems for people who wish to participate in the online open house but do not have broadband service:

  • 500 College St. SE, Lacey, WA 98503
  • 8205 Martin Way, Suite B, Lacey, WA 98516
  • 1540 Wilmington Drive, Dupont, WA 98327

Additional Wi-Fi hotspots are available via the Washington State Department of Commerce website.

8,683 animals crossed the Snoqualmie Pass East Project area

as recorded by WSDOT and partners in 2020 and 2021.

46% increase in Amtrak Cascades ridership to 251,000 passengers

in 2021 compared to 172,000 in 2020.

Nine wetland and stream mitigation sites across 32.7 acres added

to our monitoring program in 2021 to help offset climate change impacts.