Project overview
In summer 2025, local developer Benaroya Company will start work to improve the SR 505 interchange over I-5 at Exit 63 in Lewis County. Tapani Inc. will build three roundabouts—at the on- and off-ramps and at Mickelson Parkway—between mileposts 2.24 and 3.08.
The project also includes a new westbound climbing lane between mileposts 2.53 and 2.88, widening the road for freight traffic, adding a shared-use path on the north side of the overpass, installing new signs and lighting, and repainting lane markings.
Note: This is a developer project--WSDOT will oversee the work to make sure it meets contract requirements for safety and design, and that traffic control follows the approved plan.
What to expect
During construction, contractor crews will reduce the travel speed and alternate travelers through a single lane closure with flaggers, to keep travelers moving through the work zone.
Temporary lane shifts may be used and a temporary detour route may be needed using Mickelson Parkway and North Military Road.
There are no closures scheduled along I-5 or at the on- and off-ramps.
Starting in late summer 2025, developer, Benaroya Company will construct three separate roundabouts along SR 505, over I-5 at Exit 63, between mileposts 2.42-3.08 in Lewis County. Roundabouts keep traffic flowing, improve safety and reduce collisions.
