Hoover Dam Hoover Dam Hoover Dam is a concrete arch-gravity dam in the Black Canyon of the Colorado River, on the border between the U.S. states of Nevada and Arizona. It was constructed between 1931 and 1936 during the Great Depression and was dedicated on September 30, 1935, by President Franklin D. Roosevelt. Its construction was the result of a massive effort involving thousands of workers, and cost over one hundred lives. Originally known as Boulder Dam from 1933, it was officially renamed Hoover Dam, for President Herbert Hoover, by a joint resolution of Congress in 1947. Since about 1900, the Black
Steamboats of the Colorado River California, about 40 miles north of Goffs station, on the Santa Fé Railway. A mining camp, Vanderbilt was established nearby Vanderbilt Spring. The discovery of additional gold-rich veins in the fall of 1892 set off a rush to the area. A few months later gold was found at what became the placer mining camp of Murphyville, on the Arizona side of the river just twelve miles below Eldorado Canyon. Also in 1892, another gold boom occurred twenty miles east of Eldorado Canyon at White Hills in the White Hills, in Arizona Territory. Gold mines were revived in the Picacho District