4. Men working on the Hoover Dam
Bureau of Reclamation
Men hover over top of the Black Canyon and the Colorado River riding inside the pipes that will soon be installed in the Hoover Dam. Without today’s equipment on the job site, these men had to work under conditions much less than what OSHA would consider safe today. True pioneers, the men who worked on huge construction projects like this one during and after The Great Depression are unsung American Heroes. This rare historical photo was taken sometime between 1931 and 1936 while men were building the Hoover Dam.
