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)
Blast in scaling down the canyon walls for construction of the intake towers of the Boulder Dam, now called Hoover Dam. Photo taken from the river-level looking downstream. Site Name: Hoover Dam (dam)
Low-level concrete mixing plant at the construction site of Boulder Dam, now called Hoover Dam. Picture taken using telephoto lens. Site Name: Hoover Dam (dam)
Caterpillar tractors, equipped with bull-dozers, perform a multitude of tasks in connection with road building and the removal of blasted rock. 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)