An image of a project poster depicting the Hoover Dam when it was first planned to be built in Boulder Canyon. Later constructed in Black Canyon where less rock faults were found, Hoover Dam was built in the 1930s on the Colorado River between Arizona and Nevada. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
From the Morgan Sweeney Photograph Collection (PH-00228). Hoover Dam switchyard, circa 1950s. Stamp on the back reads, "Photograph by Bureau of Reclamation BCP 9187 Boulder Canyon Project Boulder City, Nevada."