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Hoover_Dam_panorama.jpg
Panoramic view of Hoover Dam and baypass bridge. Hoover Dam, is a popular tourist destination and was 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.