SR 116 - Kilisut Harbor - Remove Fish Barrier

Project news

  • Beginning in summer 2019, contractor crews working for WSDOT will begin construction on a 440-foot, two-lane concrete girder bridge spanning Kilisut Harbor just west of Marrowstone Island. View proposed design visual of the crossing.
  • A temporary speed limit reduction will be in place beginning Monday, March 25. The speed limit will be reduced from 40 mph to 35 mph between milepost 4.5 and 4.9 near Robbins Road to allow utility crews to relocate utilities. 

Needs & benefits

The goal of this project, spearheaded by the North Olympic Salmon Coalition (NOSC) and funded by its partners, is to restore historic tidal channels and fish runs between southern Kilisut Harbor and Oak Bay in Jefferson County by creating approximately 2,300 acres of productive habitat in Puget Sound. WSDOT will administer the construction contract to build the new bridge to replace the existing causeway, which has been identified as a barrier to fish. WSDOT and NOSC aim to re-establish major northern and southern migratory fish channels for juvenile and adult salmonoids, including ESA-listed Hood Canal summer Chum, Puget Sound Chinook and Puget Sound Steelhead.  

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.

During construction, travelers will encounter reduced speeds and one-way alternating traffic at the work zone throughout the entirety of the project. Any total roadway closures will be announced in advance.

The End Result 

The new bridge will sport 11-foot lanes with four-foot shoulders. Crews will accommodate traffic while improving local fish migration and restoring the estuary to a more natural state.


  • May 2019: Advertise contract for competitive bids
  • June 19, 2019: Contract awarded to Cascade Bridge, LLC.
  • Summer 2019: Construction begins
  • Fall 2020: Most work is complete


WSDOT will publish final costs after the project is awarded to lowest-apparent bidder.

Budgeted: $11.5 million


Financial Data for PIN 311605A
Funding Source Amount ($ in thousands)
2003 Gas Tax (Nickel Funding) $0
2005 Gas Tax (TPA) $0
Pre-Existing Funds (PEF) $11,929
CWA $0
Total $11,929


Tina Werner
WSDOT Communications

SR 116 Kilisut Harbor Thumbnail Image