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Hoover Dam
Hoover Dam is 30 miles southeast of Las Vegas. It was originally named Boulder Dam, but the name was changed to honor the 31st President, Herbert Hoover. Standing more than 726 feet high and weighing more than 6.6 million tons, the dam has a story to tell about the beginning of Las Vegas.

Hoover Dam
Hoover Dam
Building the dam
During the 1930s, the United States suffered through what is called the "Great Depression." This was a time when many people did not have jobs.

The government commissioned the building of Hoover Dam in Black Canyon, Nevada, to help control the Colorado River and to give people jobs.

The dam helped control the Colorado River by stopping floods during wet years and storing water for dry years. When the dam was finished, the water began to pool behind it, creating Lake Mead. We get about 88 percent of our water from Lake Mead. The dam also is a source of low-cost electricity.

People who needed jobs came to Southern Nevada to work on the dam. In fact, that is how Boulder City was created. Most of the dam workers lived in Boulder City to work on the dam, which was then called "Boulder Dam."

It took less than five years to build Hoover Dam, which is a National Historic Landmark and one of America's Seven Modern Civil Engineering Wonders.