X-SciTech The Hoover Dam Project: 50 Years to the Day July 7, 2010 / 6:48 PM EDT / CBS News U.S. Dept. of the Interior Depression-Hungry jJob Seekers Flocked to the Project U.S. Dept. of the Interior Thousands came looking for work,when it was announced that Hoover Dam construction was to begin. High Scalers Drilling into Canyon U.S. Dept. of the Interior Early Construction in Black Canyon U.S. Dept. of the Interior Jumbo Rig Allowed for Multiple Drillers to Work Together U.S. Dept. of the Interior Tunnel Entrance U.S. Dept. of the Interior Concrete Lining for Tunnel U.S. Dept. of the Interior River Bed Excavation U.S. Dept. of the Interior Powerhouse Construction U.S. Dept. of the Interior Letting Things Settle U.S. Dept. of the Interior Upstream Face U.S. Dept. of the Interior Finished U.S. Dept. of the Interior Hoover Dam Today U.S. Dept. of the Interior Hoover Dam at Night U.S. Dept. of the Interior Jet Flow Gate Testing U.S. Dept. of the Interior Aerial View of the Dam