As that dam was a curved-gravity variety,[19] equivalent in design and style into the arch-gravity as was proposed for that Black Canyon dam, opponents claimed that the Black Canyon dam's security couldn't be guaranteed. Congress authorized a board of engineers to assessment designs for your proposed dam. The Colorado River Board found the challeng

, which commenced construction about the dam in early 1931. Such a large concrete framework experienced never been designed just before, and a number of the strategies had been unproven. The torrid summer time weather and not enough services near the site also introduced problems. However, Six Corporations turned the dam in excess of to the federal

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