HOOVER DAM. Has it COOLED down? | On This Day – 17th September |

Intro: In 1930, Construction of Hoover Dam began in Black Canyon, near Las Vegas. Hoover Dam has a height of 221 meters and impounds Lake Mead, the largest reservoir in the United States by volume. An entire city was created for people working on the once Earth’s tallest dam. It used about 4.5 million cubic yards of concrete , enough to build 3000 miles of highway from one end of the United States to the other. There is so much concrete that it would have taken it 125 years to cool if a refrigerating system wouldn’t have been built. Hoover Dam’s power plant was the world’s largest hydroelectric station, with installed capacity of 2,080 megawatts and powers homes and business in Nevada, Arizona and California.


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