Black and white image of Hoover Dam. A rare view of Hoover Dam against a cloud pattern in a desert sky that is usually clear. The world-famous dam, completed by the Bureau of Reclamation, conquered the Colorado River for the first time in history. The dam, spanning the river between Nevada and Arizona, provides all of Reclamation's multipurpose benefits: flood protection, river control, water storage and conservation for irrigation; municipal and industrial uses; generation of low-cost hydroelectric energy; enhancement of navigation; recreation; and fish and wildlife protection.

The inside of the turbine room in the Hoover Dam in the early 1930s. Site Name: Hoover Dam (dam)

Pinhole view of the Hoover Dam area looking west. The U.S. Construction Railroad and the Black Canyon highway is depicted in the foreground of the photograph.

A view of the finished Hoover Dam and Lake Mead nearly full. Site Name: Hoover Dam (dam)

Photograph taken by John McCreary of a bridge spanning the canyon during construction the of Hoover Dam, January 1934.

Valve house outlet in operation at Hoover Dam.

The spillway of the Hoover Dam. It was named Boulder Dam until 1947, when it was offically renamed the Hoover Dam. Site Name: Hoover Dam (dam)