The corridor improvements between Mounts Road (Exit 116) and Gravelly Lake Drive (Exit 124) will be built in four stages of construction. The timeline shows all four stages and is subject to change.

View timeline in pdf format (pdf 115 kb).

• Stage 1: Mounts Rd. to Center Dr. Auxiliary Lane Extension project, currently under construction.
• Stage 2: I-5 Steilacoom-DuPont Rd. to Thorne Ln. Corridor Improvements project. Design-Build contract begins mid-2018.
• Stage 3: I-5 Mounts Rd. to Steilacoom-DuPont Rd. Corridor Improvements project. An open house is scheduled for Wednesday, April 11, 2018 from 4:30 p.m. to 7:30 p.m. at Pioneer Middle School in DuPont, WA.
• Stage 4: Gravelly-Thorne Connector & Shared-Use Path project.