Aerial view of the complex Interstate Bridge over the Columbia River

The bridge, actually a pair of virtually identical steel vertical-lift, "Parker type" through-truss bridges, carries Interstate Highway 5 traffic to and from Vancouver, Washington (right), and Portland, Oregon. The structure opened to traffic in 1917 as a single bridge carrying two-way traffic. A second, twin bridge opened in 1958. The 1917 structure is the northbound bridge.
Title, date and keywords based on information provided by the photographer.
Purchase; Carol M. Highsmith Photography, Inc.; 2018; (DLC/PP-2016:103-12)
Forms part of Carol M. Highsmith's America Project in the Carol M. Highsmith Archive.
Credit line: Photographs in the Carol M. Highsmith Archive, Library of Congress, Prints and Photographs Division.