New Ramps Proposed for US 101/Shelton-Matlock Interchange

The Washington State Department of Transportation has hired design-build contractor Parsons/Scarsella to remove fish barriers along Coffee Creek and rebuild two ramps at the US 101/Shelton-Matlock Road interchange. This project will open access to more than 13 miles of potential spawning habitat and create a more traditional diamond interchange.

“Parsons/Scarsella proposed an innovative design to accomplish this work,” said Washington State Department of Transportation Project Engineer Brian Whitehouse. “Their creative approach will reduce the overall construction timeline, reduce traffic effects and add improvements at the US 101/Shelton-Matlock Road interchange.”

The contractor proposes to realign Coffee Creek to flow through a new culvert under Shelton-Matlock Road, through approximately 3,000 feet of replicated natural streambed west of US 101, and into Goldsborough Creek.

Work on this project could begin as soon as late spring.

While work is under way, drivers will encounter temporary roadway shifts on Shelton-Matlock Road west of US 101 and ramp closures at the interchange. WSDOT will provide advanced notification of traffic effects.

The project is part of a larger WSDOT effort to replace culverts to improve fish passage following a 2013 U.S. District Court ruling requiring the state to significantly increase efforts to remove state-owned culverts that act as a barrier to salmon and steelhead.