Hoover Dam Constructed

Hoover Dam, once known as Boulder Dam, is a concrete arch-gravity dam in the Black Canyon of the Colorado River, on the border between the US states of Arizona and Nevada.

It was constructed between 1931 and 1936, and was dedicated on September 30, 1935 by President Franklin Roosevelt. Its construction was the result of a massive effort involving thousands of workers, and cost over a hundred lives.

“Hoover Dam” or “Boulder Dam”. Few know that Hoover Dam was originally named Boulder Dam. That’s because the initial planned site was at Boulder Canyon about 10 miles north upriver from where it is now located at Black Canyon. An engineering reassessment moved the location from Boulder Canyon to its present location. The Herbert Hoover administration changed the name from Boulder Dam to Hoover Dam in 1930 as a political move. In 1933, the Franklin Roosevelt administration changed it back to Boulder Dam, and under Harry Truman, the permanent name of Hoover Dam was restored.