The Umatilla Bridge, the easternmost bridge connecting Washington and Oregon, was opened to traffic on April 15, 1955.
The steel cantilever bridge … carries Interstate 82 from near Plymouth, Benton County, Washington, to Umatilla County, Oregon. The structure is located just west of the McNary Dam and a bit farther west from where the Columbia bends from its north-south orientation to run west toward the Pacific Ocean.
The 3,308 foot long through-truss steel cantilever bridge was financed by Umatilla County bonds, which were paid off with tolls in 1974.
In 1987 a parallel concrete bridge was built adjacent to the original bridge.
Photo credit: Gary Halvorson, Oregon State Archives
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