An image of a bus and car stopped on the highway on the Arizona side of Hoover Dam. The name was officially changed from Boulder Dam to Hoover Dam in 1947.
Black and white image showing a downstream view of the Hoover Dam construction site from the lower slope of the upper cofferdam. The excavation for the base of the Nevada intake towers can be seen in the upper right. Note: Boulder Dam was officially renamed Hoover Dam in 1947.