These photos show Hoover Dam (formerly known as Boulder Dam) in the 1930s. The dam is on the border between Arizona and Nevada, being constructed between 1931 and 1936. During the course of construction over 100 lives were lost, though the project came in more than two years ahead of schedule.
Close-Up Photograph of Boulder Dam Transmission Lines on Side of Cliff
Source: U.S. National Archives
Photograph of the Boulder Dam from Across the Colorado River
Source: U.S. National Archives
