The Northport Bridge spans the

Columbia River The Columbia River (Upper Chinook: ' or '; Sahaptin: ''Nch’i-Wàna'' or ''Nchi wana''; Sinixt dialect'' '') is the largest river in the Pacific Northwest region of North America. The river rises in the Rocky Mountains of British Columbia, C ...

near

Northport, Washington Northport is a town in Stevens County, Washington, United States. The population was 295 at the 2010 census. History Northport began when railroad builder Daniel C. Corbin had agents purchase two wooded benches overlooking the Columbia River f ...

, close to the border with Canada. The steel cantilever through-truss bridge replaced an 1897 timber bridge, and was opened in 1951. It carries

Washington State Route 25 State Route 25 (SR 25), named the Coulee Reservoir Highway, is a state highway serving communities in Lincoln and Stevens counties in the U.S. state of Washington. The highway begins at an intersection with (US 2) east of Daven ...

. It is one of a series of similar bridges built at about the same time, including the Grand Coulee Bridge and the Kettle Falls Bridges. The Northport Bridge's total length is . The main span consists of a central span of between cantilever spans, for a total span of . The steel anchor spans are long, with additional concrete approach spans. The bridge opened to traffic on June 13, 1951, at a cost of $1,751,587. The bridge was designed by George Stevens of the Washington State Highways, and the main span was built by the Midland Structural Steel Company. Work began in August 1946. Floods in 1948 undermined the south main pier of the steel structure, causing the design to be changed from a section of earth fill to five additional T-beam concrete approach spans. Underwater blasting was required to remove the south pier for the altered work, resulting in a series of concrete approach spans on the south. The Northport Bridge was placed on the

National Register of Historic Places The National Register of Historic Places (NRHP) is the United States federal government's official list of districts, sites, buildings, structures and objects deemed worthy of preservation for their historical significance or "great artistic v ...

on May 24, 1995.

References

{{Authority control Road bridges on the National Register of Historic Places in Washington (state) Bridges over the Columbia River Transportation buildings and structures in Stevens County, Washington Bridges completed in 1951 National Register of Historic Places in Stevens County, Washington 1951 establishments in Washington (state) Steel bridges in the United States Cantilever bridges in the United States