The Bonneville Dam Historic District, spanning the Columbia River between Skamania County, Washington, and Multnomah County, Oregon, is of outstanding national significance as the first federal hydroelectric and navigation project on the Columbia River. Authorized under the National Industrial Recovery Act of 1933 and constructed by the U.S. Army Corps of Engineers, the dam represents a monumental achievement of the New Deal era designed to stimulate the regional economy during the Great Depression. By harnessing the immense power of the Columbia River, the project provided cheap, abundant electricity that transformed the Pacific Northwest from a resource-extraction economy into a major industrial powerhouse, which proved critical for fueling the nation's aluminum production and shipbuilding industries during World War II. Additionally, the dam's state-of-the-art navigation lock successfully tamed the treacherous Cascade Rapids, opening the upper Columbia River to commercial barge traffic and establishing a vital inland shipping corridor.

Architecturally, the historic district is distinguished by its cohesive integration of massive concrete engineering structures with refined, stripped-down Art Deco and Classical Revival design elements, primarily executed under the direction of architect Clifton A. Hershey. The district encompasses key contributing features of the original complex, including the spillway dam, the first powerhouse, the original navigation lock, and a series of pioneering fish ladders designed to mitigate the dam's impact on the Columbia River's vital salmon runs. Beyond these industrial components, the district preserves the residential and administrative buildings constructed for the dam's operators, representing a fully realized, self-contained federal enclave. Designated a National Historic Landmark in 1986, the Bonneville Dam Historic District stands as an enduring monument to 1930s-era public works, engineering innovation, and regional economic transformation.