Duckabush River Bridge, Road bridge near Brinnon, United States.

Duckabush River Bridge is a 168-foot (51 m) concrete through tied-rib arch on U.S. Route 101 in Jefferson County, Washington. Its 110-foot (34 m) arch and two concrete girder spans carry a 24-foot-wide (7.3 m) deck, which hangs by suspenders from a pair of arch ribs and acts as the tie. Three struts connect the ribs.

The Duckabush River Bridge was built in 1934 by the West Coast Construction Company as one of five concrete tied-arch bridges erected in Washington in the 1920s and 1930s. In this design the deck slab acts as a tie, resisting the arch's horizontal thrust and removing the need for massive abutments. It was listed on the National Register of Historic Places in 1982.

The bridge is one of five reinforced concrete tied arches built in Washington in the 1920s and 1930s. In this design the deck slab itself resists the arch's horizontal thrust, so no massive abutments were needed. It was listed on the National Register of Historic Places in 1982.

The bridge carries traffic on U.S. Route 101 and is accessible as part of normal vehicle passage through the area. You can pull off the road nearby to get a closer look at the structure and appreciate its design.

The bridge features three lateral struts that distribute both traffic and wind loads across the entire span in an innovative way. This engineering detail was an advanced solution for maintaining structural stability under diverse conditions.