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Hoover Dam is a concrete arch-gravity dam in the Black Canyon of the Colorado River, on the border between the U.S. states of Nevada and Arizona. Constructed between 1931 and 1936, during the Great Depression , it was dedicated on September 30, 1935, by President Franklin D. Roosevelt .
Six Companies, Inc. was a joint venture of construction companies that was formed to build the Hoover Dam on the Colorado River in Nevada and Arizona. [1]They later built Parker Dam, a portion of the Grand Coulee Dam, the Colorado River Aqueduct across the Mojave and Colorado Deserts to urban Southern California, and many other large projects.
To place this into context, that is more than the entire construction of the Hoover Dam, its associated power plants and appurtenant works, where a total of 4,360,000 cu·yds (3,333,459 m 3) of concrete was poured—equivalent to a U.S. standard highway from San Francisco to New York City.
It was announced that because of Hoover's passion towards the project, the dam would be named after him. As construction began in 1931, so did the Great Depression. Workers flocked to Boulder City ...
Videos posted to Twitter and Facebook by visitors show a thick plume of black smoke rising from the base of the 726-foot-high landmark in Nevada.
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The National Inventory of Dams defines any "major dam" as being 50 feet (15 m) tall with a storage capacity of at least 5,000 acre-feet (6,200,000 m 3), or of any height with a storage capacity of 25,000 acre-feet (31,000,000 m 3).
An early example at Hoover Dam used a network of pipes between vertical concrete placements to circulate cooling water during the curing process to avoid damaging overheating. Similar systems are still used; depending on volume of the pour, the concrete mix used, and ambient air temperature, the cooling process may last for many months after ...