The number fell just $24,000 short of the Reclamation Service’s own accounting, low enough to win the contract for Six Companies. With the success of the Hoover Dam—the project was completed ...

High Scalers drill into the canyon wall 500 feet above the Colorado River in Black Canyon at the Hoover Dam site. April 1, 1932. Bureau of Reclamation. Even under the best of conditions, dam ...