Answer:
colorado RiverIn the early 20th century, the U.S. Bureau of Reclamation devised plans for a massive dam on the Arizona-Nevada border to tame the Colorado River and provide water and hydroelectric power for the developing Southwest. Construction within the strict timeframe proved an immense challenge, as the crew bored into carbon monoxide-choked tunnels and dangled from heights of 800 feet to clear canyon walls. The largest dam in the world at the time of its completion in 1935, this National Historic Landmark stores enough water in Lake Mead to irrigate 2 million acres and serves as a popular tourist destination.
At the turn of the 20th century, farmers sought to divert the Colorado River to budding Southwestern communities via a series of canals. When the Colorado broke through the canals in 1905, creating the inland Salton Sea, the job of controlling the raging river fell to the U.S. Bureau of Reclamation.
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