CSPAN3 Key Capitol Hill Hearings September 2, 2014
Walls for each blast. Suspended on ropes, they drilled holes in the rock and loaded them with dynamite. After each explosion these daredevils swarmed over the cliffs, prying loose rock and clearing the walls of debris. In november 1932, the Colorado River was diverted. Under control for the first time in its history, the river flowed around and past the site. Men in trucks dumped earthen rock embankment across the canyon below the openings forcing the river from its age old bed through the huge diversion tubes. A second earth and rock dam was thrown across the tunnel downstream keeping water f...