An image of the memorial plaque after it was unveiled at Boulder Dam. Spectators of the event gathered beneath the plaque commemorating the 96 men who had died during the construction of the dam. Transcribed across the center of the plaque: "They died to make the desert bloom." Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Black and white image of boats used to transport men, powder, and supplies up and down the Colorado River in Black Canyon during the construction phase of the Boulder Canyon Project, better known as Hoover Dam. 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.