US 101 - Unnamed Tributary to Hoh River - Remove Fish Barrier - Complete September 2020

Project News

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  • This project removes and replaces an outdated, 5-foot-wide, 55-foot-long culvert that had a substantial water drop, which impeded fish from continuing upstream. Crews replaced it with a 16-foot-wide, 60-foot-long, concrete box-culvert in the creek for salmon and resident fish.

Needs & Benefits

The existing culvert runs from an unnamed tributary to Hoh River in Jefferson County and has been identified by WSDOT and the Washington State Department of Fish and Wildlife as a barrier to fish needing correction. It is roughly 60 percent passable in its current condition and species such as bull trout, steelhead, coho and cutthroat salmon have been identified at this location.

This work is part of WSDOT’s Fish Passage Barrier Removal Program, which identifies and removes barriers to fish caused by culverts under state highways. WSDOT works in partnership with the Washington Department of Fish and Wildlife to identify culverts that, once replaced, will increase fish habitat. This particular project has a potential habitat gain for fish of approximately two miles.

During construction, travelers will use a one-lane detour at the site that will be controlled by a temporary signal. Travelers should expect minor delays, reduced speed limits and occasional roadway closures. Any roadway closures will be announced in advance.

The End Result

The new 5’x5’, 55-foot long concrete boxed culvert is expected to open nearly two miles of potential fish habitat. This fish passage project will help restore the streambeds to a more natural state and improve fish passage for local migratory fish.


  • Contract awarded to Interwest Construction: Monday, Dec. 2, 2019
  • Construction begins Monday, June 22, 2020.
  • Construction mostly complete (roadway fully reopens to traffic) fall 2020.


Project total: $2.5 million from Pre-Existing Funds (PEF).



Dan McKernan
WSDOT Port Angeles Project Engineer

Tina Werner
WSDOT Media Relations 

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