Black and white photographic image of the visitors' gallery inside Hoover Dam's power plant. Written on the front of the postcard: "Visitors gallery, power plant, Boulder Dam."
Color image of Hoover Dam looking upstream and showing the white water of the Colorado River below the spillway tunnel outlets. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
An image of a burro and a man standing on rocks near Hoover Dam. The dam's intake towers are visible in the background. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
An image of a burro and a man standing on rocks near Hoover Dam. The dam's intake towers are visible in the background. Note: Boulder Dam was officially renamed Hoover Dam in 1947.