Stock Photo - Hoover Dam,also known as Boulder Dam,is a concrete gravity_arch dam in the Black Canyon of the Colorado River,on the border between the U.S. states of Arizona and Nevada. The dams is 790 feet high and construction was completed in 1935.

Stock Photo: Hoover Dam, also known as Boulder Dam, is a concrete gravity-arch dam in the Black Canyon of the Colorado River, on the border between the U.S.

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