The construction of this project was a part of WSDOT’s Fish Passage Removal Program that removes barriers to fish caused by culverts installed on state highways. This project was particularly unique in that it was led by the efforts of the North Olympic Salmon Coalition (NOSC) and funded by its partners to restore the tidal connection between Oak Bay and Kilisut Harbor which will help reestablish the natural process to 27 acres of habitat.
The existing SR116 causeway was replaced on this project by constructing a 440 ft. four-span precast/pre-stressed girder bridge founded on spread footings at the Abutments and 6’-0” drilled shafts at the Piers and had a cast-in-place deck, curb rail and Massachusetts tube railing. The project also entailed performing extensive channel excavation, restoration and beach nourishment placement. A water-filled cofferdam system was installed to facilitate this work.