Benton City – Kiona Bridge, Road bridge in Benton City, Washington, US

The Benton City–Kiona Bridge is a 400-foot-long, 26-foot-wide steel box girder bridge carrying two lanes of SR 225 over the Yakima River just south of downtown Benton City. Its 4-foot sidewalks sit 10 inches above the roadway, and unlike the highway approaches, the span has no bicycle lanes.

The bridge opened in 1957 and replaced two earlier structures that had connected the two towns since 1901. The previous crossing stood further downstream on the Yakima River.

The Washington Heritage Register included this structure in 2002, recognizing its engineering design as the first steel box girder bridge in the United States.

The bridge has sidewalks on both sides that are clearly separated from traffic and easy to walk. You can reach it conveniently from Interstate 82 and U.S. Route 12.

The bridge is believed to be the first steel box girder bridge built in the United States. Its designer, Homer M. Hadley, also designed the Lacey V. Murrow Memorial Bridge across Lake Washington. The span was built with clearance 2 feet 9 inches above the 1933 Yakima River flood level.