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Hoover Dam, in Blendon Township, near Westerville, Ohio, dams the Big Walnut Creek to form the Hoover Memorial Reservoir. This reservoir is a major water source for the city of Columbus, Ohio. It holds of water and has a surface area of , or about five square miles. Construction began during 1953 due to the increased water demand of post-war Columbus. The project was completed and dedicated in 1955 and the dam officially opened in 1958. It was named for two brothers, Charles P. Hoover and Clarence B. Hoover, to honor their careers with the City of Columbus Waterworks.〔(【引用サイトリンク】url=http://utilities.columbus.gov/content.aspx?id=41829 )〕 == Construction statistics == * Quantity of concrete: approximately 180,000 cubic yards * Quantity of earth fill: approximately 600,000 cubic yards * Length of spillway: * Length of dam: * Maximum height of dam: approximately above stream bed * Uncontrolled spillway elevation: mean sea level * Top of dam elevation: mean sea level 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hoover Dam (Ohio)」の詳細全文を読む スポンサード リンク
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