This Is How Hoover Dam Was Built, 1936

This Is How Hoover Dam Was Built, 1936 Hoover Dam was not just built in a canyon. Before construction could even begin, engineers had to move the Colorado River itself. In the middle of the Great Depression, thousands of workers came to the Nevada-Arizona border looking for work. In the Black Canyon, under brutal desert heat, they drilled through solid rock, blasted diversion tunnels, hung from ropes hundreds of feet above the canyon floor, and poured one of the largest concrete structures ever attempted. The engineering problems were almost impossible. The Colorado River had to be diverted through four massive tunnels. Loose rock had to be removed from the canyon walls by high scalers working on ropes. Millions of cubic yards of concrete had to be poured without cracking from the heat of curing. To solve that problem, engineers embedded hundreds of miles of steel pipe inside the dam and pumped ice-cold water through the concrete until it cooled. Hoover Dam was built as an arch-gravity structure, using both its own enormous weight and the strength of the Black Canyon walls to hold back Lake Mead. It created hydroelectric power, controlled floods, stored water for the American Southwest, and became one of the most iconic engineering achievements in United States history. But the human cost was severe. Workers faced carbon monoxide in the diversion tunnels, extreme heat in the desert, falling rock, blasting accidents, and dangerous work high above the canyon floor. The official industrial death toll was 96, though the true number may have been higher. This documentary reconstructs how Hoover Dam was built: the tunnels, the high scalers, the concrete cooling system, the cableways, the strike, the hidden deaths, and the engineering decisions that allowed a wall of concrete to hold back one of America’s most powerful rivers. Sources used for research: Bureau of Reclamation; PBS American Experience; National Park Service; U.S. Census historical features; Hoover Dam construction records; and the documentary script used for this video. #HooverDam #Engineering #AmericanHistory #Construction #Megaprojects #HistoryDocumentary #GreatDepression #ColoradoRiver