The Hoover Dam is located in Black Canyon spanning the Colorado River between Arizona and Nevada, about 30 miles southeast of Las Vegas, Nevada. The Hoover Dam is 726.4 feet from foundation rock to the roadway on the crest of the Dam. The towers and ornaments on the parapet rise 40 feet above the crest.
History of the Hoover Dam Concrete
The total weight of the Hoover Dam is 6,600,000 tons. There are 4,360,000 cubic yards of concrete in the dam, powerplant, and appurtenant works. This much concrete would build a monument 100 feet square and 2 ½ miles high; would rise higher than the 1,250 foot tall Empire State Building if placed on ordinary city block; or would pave a standard highway 16 feet wide, from San Francisco to New York City.
The first concrete for the dam was placed on June 6, 1933, and the last on May 29, 1935. Approximately 160,000 cubic yards of concrete was placed in the dam per month. They had to cool the concrete by embedding more than 582 miles of 1-inch steel pipe into the concrete and circulate ice water through it from a refrigeration plant that produced 1,00 tons of ice in 24 hours. Cooling was completed in March 1935.
A total of 21,000 men worked on the dam with an average of 3,500 and a maximum of 5,218 daily, which occurred in June 1934. The average monthly payroll was $500,000.
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