Hoover Dam is a key project for the comprehensive development of water resources on the Colorado River in the United States. It is located at the junction of Nevada and Arizona. It has comprehensive benefits such as flood control, irrigation, power generation, shipping and water supply. The dam is a concrete gravity arch dam, the height of the dam is 221.4m, the reservoir formed by the dam is called Mead Lake, the total reservoir capacity is348.5 billion cubic meters, and the installed capacity of the hydropower station is now 2.08 million kW. Construction started in April 1931, completed in March 1936, and the first unit was officially generated in October 1936.