Black and white image of the construction phase of Hoover Dam. The metal framework seen at the base of the dam will later become the dam's powerhouse. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Black and white image of Hoover Dam as seen from the control tower of the 150-ton cableway on the Nevada rim of Black Canyon. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
An image showing an aerial view of Hoover Dam and Lake Mead. Part of the plane from which the image was taken are visible. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Black and white image of diversion tunnel #2 on the Nevada side of Hoover Dam. This image shows the groundwork for the tunnel. Note: Boulder Dam was officially renamed Hoover Dam in 1947.