US 101 - Coffee Creek - Remove Fish Barrier

Project news

  • As early as Monday, Dec. 9, crews will open the new southbound US 101 exit to Shelton-Matlock Road. The new exit is about 1,500 feet or the length of five football fields before the current southbound exit. This means that travelers will need to take the exit to Shelton-Matlock Road sooner than they are used to. Once the new exit to Shelton-Matlock Road is open, crews will close the existing exit. 
  • Users of this interchange are encouraged to sign up for email updates
  • ​Get advance notification of lane and ramp closures. 

Why is WSDOT removing barriers to fish on Coffee Creek?

WSDOT is under a federal court injunction to remove state-owned culverts that block habitat for salmon and steelhead. Coffee Creek currently has several barriers to fish as the creek flows under both directions of US 101 as well as both on- and off-ramps at the US 101/West Shelton/Matlock interchange.

The End Result

In this project, crews will improve fish habitat by realigning Coffee Creek on a relatively parallel path west of US 101, under West Shelton Matlock Road and into Goldsborough Creek. Crews will also improve driver access to/from US 101 by changing the alignment of the ramps at that location.

Needs & benefits

The existing stream channel will be graded to simulate a natural streambed and will open over 13 miles of potential upstream habitat for salmon and steelhead. This habitat improvement will be accomplished by slowing the velocity of the stream during times of high water and providing a deeper channel during times of low flowing water.

Additionally, native vegetation will be planted along the stream banks to restore a natural stream environment.

In addition, crews will also make interchange enhancements to the southbound US 101 exit to City Center/Matlock and the West Shelton Matlock Road on-ramp to southbound US 101. Both ramps under the proposed design will be rebuilt into a diamond interchange similar to both the northbound US 101 exit and on-ramp.

Timeline

Preliminary design - winter 2018
Construction - summer 2019
Project completion - winter 2020

Funding

Financial Data for PIN 310195H
Funding Source Amount ($ in thousands)
2003 Gas Tax (Nickel Funding) $0
2005 Gas Tax (TPA) $9,475
Pre-Existing Funds (PEF) $9,946
CWA $0
Total $19,421

Contact

Doug Adamson
WSDOT Communications
360-357-2716

John Romero
WSDOT Project Engineer's Office 
360-570-6750

US 101-Coffee Creek-Remove Fish Barrier - Project vicinity map