The vehicles, a cross between a traditional bicycle and ... showcasing the very reason for the Hoover Dam's existence. The path becomes more rugged as it shifts from National Park Service land ...

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 ...

THE completion, just announced, of the great concrete structure originally known as the Boulder Dam, but afterwards officially designated the Hoover Dam, across the Colorado River in Black Canyon ...