• Project

I-5 - Mounts Rd. to Steilacoom-DuPont Rd. - Corridor Improvements

Project overview

This project is intended to help relieve chronic traffic congestion and improve mobility along I-5 near Joint Base Lewis-McChord. Crews will rebuild the Steilacoom-DuPont Road (Exit 119) interchange and extend I-5 HOV lanes to Mounts Road.

Timeline
2023-2026
Project status
Construction
Funding
$233.3 Million
Project hotline

What to expect

Travelers on Joint Base Lewis-McChord who use Pendleton Avenue below I-5 are encouraged to plan for a series of night closures. 

9 p.m. Sunday, Dec. 1 to Thursday, Dec. 19 to 4 a.m. each following day

  • Pendleton Avenue between West Way and Main Street will close nightly.
  • A signed detour will be provided.

I-5 work

Crews have created a new work zone in the I-5 median. The new work zone allows crews to build new northbound and southbound I-5 HOV lanes. 

Work also continues on a new I-5 bridge over Pendleton Avenue. Crews also will continue building a new Steilacoom-DuPont Road interchange and a connecting roundabout from Steilacoom-DuPont Road.

I-5 lane closures 

Travelers can expect regular night lane closures on both directions of I-5. People can expect night lane closures as early at 7 p.m. between Center Drive and 41st Division Drive.  The lane closures generally are planned each Monday through Thursday night. 

Ramp closures

Ramps will close no earlier than 7 p.m. and will reopen by 4:30 a.m. the next morning. No more than two consecutive ramps will close at a time. A signed detour will direct drivers to the next nearest on- or off-ramp.

 

The project will add HOV lanes to both directions of I-5.

Crews will rebuild the Steilacoom-DuPont Road interchange.The new interchange will connect to Steilacoom-DuPont Road near Pendleton Avenue. Workers will replace the existing at-grade railroad crossing. Crews will build a new bridge. It will carry travelers over the tracks.