![]() The dam is an arch gravity structure rising 726 feet above bedrock.Ultimately, more than 1,500,000 cubic yards of soil and rock were removed from the tunnels. Four 56-foot-diameter tunnels were driven through the canyon walls - 2 on either side - to divert the Colorado River around the dam work site.Working around the clock, they completed the dam two years ahead of schedule. and probably one of the premier dam construction engineers who ever worked in the United States. Crowe, Hon.M.ASCE was construction superintendent for Six Companies, Inc. In March 1931, the Bureau of Reclamation awarded the contract to a consortium of six large construction firms, called Six Companies, Inc., that bid together on the project because it was larger than any one could handle. A dam project of this monumental scale had never been built in America: diverting the Colorado River through four massive tunnels blasted out of hard rock pouring 6.6 million tons of concrete to build the world's largest concrete dam and building two giant spillways and four intake towers - all in a remote desert region. ![]() Davis proposed a dam of unprecedented height to control the devastating floods on the Colorado River, generate hydroelectric power, and store the river's ample waters for irrigation and other uses. ![]() Reclamation Service's director and chief engineer Arthur P. The Hoover Dam, a 726-foot high-arch gravity structure, was the greatest constructed project at that time and remains one of the highest concrete dams in the Western Hemisphere.
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