Black and white image showing dynamite blasts being fired simultaneously for the locations of the Arizona (left) and Nevada (right) intake towers at Hoover Dam. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Day shift construction workers for Boulder Dam, now called Hoover Dam, entering transports at the upper portals for their return journey to Boulder City ten miles away. Site Name: Hoover Dam (dam)
An interior view of Boulder Dam's powerhouse; an unidentified man stands in front of one of the newly completed power generators. Boulder Dam was officially renamed Hoover Dam in 1947.
Reproduction of photo used for engraving Boulder Dam stamp. Caption on photo reads: "This is an actual photo of the retouched photograph from which the engraving for the Boulder Dam stamp was made. Original valued at $1600.00." Boulder Dam was officially re-named Hoover Dam in 1947.