An image of Boulder Dam with open jet flow gates (outlet works). The name was officially changed to Hoover Dam in 1947. Bridge is visible in the foreground.
An image showing a bird's eye view of cars driving on the crest of Hoover Dam. The text on the lower left corner of the image reads: Boulder Dam. Boulder Dam was officially renamed Hoover Dam in 1947.
An image showing an aerial view of people looking at one of the Hoover Dam spillways. Automobiles travel over a concrete bridge. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Black and white image of Hoover Dam construction. A cat-walk is visible, spanning the canyon over the upstream cofferdam. The span is approximately between triangulation points C-7 and C-8. Elevation at the middle of the span is approximately 1,005 feet. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
An image of Parker Dam on the Colorado River at the California-Arizona border, 155 miles downstream from Hoover Dam. Note: Boulder Dam was officially renamed Hoover Dam in 1947.