Black and white image of the Hoover Dam construction site at Black Canyon showing an upstream view during construction. This picture is one of several that cover the entire construction phase of the Hoover Dam from beginning on October 12, 1931, to completion on September 11, 1936. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Black and white image of Secretary of the Interior, Dr. Ray Lyman Wilbur, on a tour of inspection at Hoover Dam. It was under Dr. Wilbur's supervision that the Boulder Canyon Project was commenced. In the background the concrete form used in lining the 50-foot diversion tunnels at the outlet portal of Diversion Tunnel No. 2 can be seen. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Black and white image of Hoover Dam under construction. This view is looking down into the upper cofferdam area from the rim of the Arizona side of Black Canyon. Also visible are a temporary earth diversion dam and steel sheet piling extending out from the Nevada abutment and marking the upstream toe of the cofferdam. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
An image of Arizona Street (pointing northeast) in Boulder City. From this view point, may different city shops are visible, such as a Shell gas station, the Visitors Bureau, and the Nava-Hopi Trading Post, as well as a sign directing visitors to the nearby Hoover Dam. The Hoover Dam Visitors Bureau was originally known as the Boulder Dam Tourist Service Bureau, as the dam's name officially changed in 1947.