Night view during the construction of Boulder Dam, now called Hoover Dam, looking upstream from below the lower portals of the diversion tunnels. The canyon presents a spectacular sight at night, with its myriads of lights. Site Name: Hoover Dam (dam)
Before completion of cofferdam on Colorado River. Canyon showing start of fill for cofferdam. Oct 3, 1932. Note on back: ""Crowding river over prior to installation of Coffer Dam. Then diverted river through diversion tunnels. - W. A. Davis.""
An image of hydroelectric generators inside the powerhouse at Hoover Dam. A man standing next to one of the generators shows their scale. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
A view looking down the downstream face of Hoover Dam; from this angle, the power house can be seen at the base of the dam, along with empty outlet works from the Nevada valve house on the right.