Hoover Dam, also known as Boulder Dam, is a dam in the Black Canyon of the Colorado River, on the border between Arizona and Nevada states in the USA. The dam, located 48km (30 miles) southeast of Las Vegas, is named after Herbert Hoover, who played an instrumental role in its construction, first as a Secretary of Commerce and later President of the United States.
Construction began in1931 and was completed in 1936, over two years ahead of schedule. Listed on the National Register of Historic Places in 1981, Hoover Dam was designated a National Historic Landmark in 1985. Before the construction of the dam, the Colorado River Basin periodically overflowed its bank when snow melted and drained into the river.
Apart from essential flood control, the dam provided the expansion of irrigated farming in the parched region. It also provided a dependable supply of water for Los Angeles and other Southern California communities.
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