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Hoover Dam
726 ft (221 m) high and 1,244 ft (379 m) long, on the Colorado River between Nev. and Ariz.; one of the world's largest dams. Built between 1931 and 1936 by the U.S. Bureau of Reclamation, the dam is named for President Herbert Hoover ; from 1933 to 1947 it was known as Boulder Dam. A key unit on the Colorado , the dam is a major supplier of hydroelectric power and provides for flood control, river regulation, and improved navigation. Hoover Dam impounds Lake Mead , the largest reservoir in the United States; water is used to irrigate more than 650,000 acres (263,000 hectares) in S California and Arizona, and c.400,000 acres (162,000 hectares) in Mexico. Hoover Dam is part of Lake Mead National Recreation Area (see National Parks and Monuments , table). Boulder City , Nev., was built to house workers on the project.
Bibliography: See J. E. Stevens, Hoover Dam (1988).
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