Looking upstream at the Boulder Dam (now called Hoover Dam) under construction. "Boulder Dam, looking upstream August 31, 1933 2345" is written at the bottom of the photo. Site Name: Hoover Dam (dam)
Looking upstream at the Boulder Dam (now called Hoover Dam) under construction. "Boulder Dam, looking upstream September 15, 1933 2355" is written at the bottom of the photo. Site Name: Hoover Dam (dam)
Looking upstream at the Boulder Dam (now called Hoover Dam) under construction. "Boulder Dam, looking upstream September 22, 1933 2361" is written at the bottom of the photograph. Site Name: Hoover Dam (dam)
Black and white image of concrete being placed into the side walls of diversion tunnel #4 at Hoover Dam. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Black and white image of concrete being placed into the side walls of diversion tunnel #4 at Hoover Dam. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Black and white image of Hoover Dam construction, including work on the dam forms and intake towers. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
A group of individuals viewing the Hoover Dam from the very bottom of the basin. They are all looking up at the massive concrete structure. Site Name: Hoover Dam (dam)