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.
An image of an interior view of the Hoover Dam powerhouse under construction. Caption on bottom of image reads: "Interior of power house. Boulder Dam. Nevada." Boulder Dam was renamed Hoover Dam in 1947.
Gantry Crane transporting 4 cubic yard Rex motor mixers in pouring tunnel lining during the construction of Boulder Dam, now called Hoover Dam. Site Name: Hoover Dam (dam)
Temporary cable-way spanning the Colorado River, near Look-Out Point, providing access to the Arizona Spillway operations during construction of the Hoover Dam. Site Name: Hoover Dam (dam)
Boulder Dam (now called Hoover Dam) construction. Trucks hauling 2-cubic-yard buckets, bringing concrete from the mixing plant for invert lining. Site Name: Hoover Dam (dam)
An image of the downstream face of Hoover Dam including the powerhouse and one of the diversion tunnel portals. Note: Boulder Dam was officially renamed Hoover Dam in 1947.