Constructed between 1931 and 1936, during the Great Depression, it was dedicated on September 30, 1935, by President Franklin D. Roosevelt. Its construction was the result of a massive effort involving …

Oct 5, 2024 · The construction of the Hoover Dam was one of the largest and most challenging engineering projects ever attempted at the time. Work began in 1931, at the height of the Great …

Mar 1, 2025 · A year shy of its 90th anniversary, experts still marvel at the construction of the Hoover Dam, one of the most visited sites in the world.

More than 200 engineers worked to design the dam that would be constructed in Black Canyon. It would be the highest concrete arch dam in the United States, and the largest building project that the …

On March 11, 1931, the Secretary of the Interior awarded the contract for construction of Hoover Dam to the lowest bidder, Six Companies, Inc., of San Francisco, California.

Upon becoming Secretary of Commerce in 1921, Hoover proposed the construction of a dam on the Colorado River. In addition to flood control and irrigation, it would provide a dependable supply of …

Apr 14, 2010 · 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.

Dec 12, 2025 · Construction began in January 2005 on a long-planned Hoover Dam Bypass Project, and in October 2010 a concrete arch bridge with a 1,060-foot (322-metre) span—the longest in North …

Explore the incredible Hoover Dam history and facts. Learn about its massive construction origin, architectural significance, and quick facts at a glance!

Bureau of Reclamation, Lower Colorado Region. Official Bureau of Reclamation Web Site for Hoover Dam. Information provided about the construction of the dam, how it works, and how to take a tour of …