The Colorado River has more dams than any other river in the United States. In total, there are 15 dams on the Colorado River, all of which are used to pool water for irrigation and generate electricity.
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Hoover Dam: The Hoover Dam is perhaps America's most famous dam and was certainly the most expensive engineering project in the country at the time. It was built between 1931 and 1935 and stands at 726 feet tall, which made it the tallest dam until the Oroville was built.
According to the National Inventory of Dams (as of November 3, 2022), there are currently 91,720 total in the 50 states (there is also one dam listed for Guam and 36 dams for Puerto Rico). Texas is the state with the most dams with 7,352 dams.
The strength of the Amazon River in South America dwarfs other rivers on the planet. The amount of water flowing through the Amazon is greater than the amount carried by the Mississippi, the Yangtze, and the Nile combined.
What you see is not what you get at Parker Dam, known as “the deepest dam in the world.” Engineers, digging for bedrock on which to build, had to excavate so far beneath the bed of the Colorado River that 73 percent of Parker Dam's 320-foot structural height is not visible.
The worst dam failure in the United States was the Johnstown flood of 1889. The failure of the South Fork Dam, which affected Johnstown, is currently regarded as the worst dam failure in U.S. history.
A dam is defined as a barrier constructed to hold back water and raise its level, forming a reservoir used to generate electricity or as a water supply. The oldest dam in America is Old Oaken Bucket Pond Dam. It was built in 1640 and is located in Scituate, Massachusetts.
The upper Wisconsin River has been called the hardest working river in the nation, a title well deserved. It contains 26 hydroelectric dams with 21 storage reservoirs, more than any other stretch of river in the United States.