Black and white image of Hoover Dam with the following printed description: "Upstream face of the dam as seen from portal of construction tunnel on Nevada side of Black Canyon." Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Downstream side of Hoover Dam showing the electric generators and lines that create hydroelectric power. The Colorado River reaches right up to the Dam's wall. Photograph by Bureau of Reclamation, Boulder City, Nevada.