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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 U.S. states of Arizona and Nevada.
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Hoover Dam - Wikipedia, the free encyclopedia
ructural), Gordon Kaufmann (exteriors)Architectural styleArt DecoGoverning bodyBureau of ReclamationMPSVehicular Bridges in Arizona MPS (AD)NRHP Reference #81000382Significant datesAdded to NRHPApril 8, 1981[3]Designated NHLAugust 20, 1985[4] <span>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 U.S. states of Arizona and Nevada. 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 mas


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