What is the largest power dam in the world?

Three Gorges Dam, China is the world's largest hydroelectric facility. Accroding to Wikimedia, the Three Gorges Dam is a hydroelectric gravity dam that spans the Yangtze River by the town of Sandouping, in Yiling District, Yichang, Hubei province, China.



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One of the most controversial aspects of the mega-project was its enormous cost for villagers who had lived for centuries on the banks of the river. To make way for the dam's massive reservoir, about 1.4 million people were uprooted, their ancestral homes demolished, communities broken up and farmlands flooded.

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5 Dams in the U.S. that Hold the Most Water
  • Hoover Dam (Nevada/Arizona): 8.95 cubic miles.
  • Glen Canyon Dam (Arizona): 8.53 cubic miles.
  • Garrison Dam (North Dakota): 7.05 cubic miles.
  • Oahe Dam (South Dakota): 6.98 cubic miles.
  • Fort Peck Dam (Montana): 5.52 cubic miles.


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The tallest is Oroville Dam in northern California, a 770.5-foot (234.8 m) embankment dam completed in 1968. Five of the ten tallest dams in the U.S. are located in California.

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Lake Roosevelt is the name of the Columbia River reservoir behind Grand Coulee Dam. It is named for Franklin Delano Roosevelt, who as president authorized the initial construction of the dam and remained its champion as long as he was president.

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Oroville Dam, located about 70 miles north of Sacramento at the three forks of the Feather River, is the tallest dam in the United States, standing over 770 feet tall. The dam is an earthfill dam that holds back Lake Oroville, a manmade reservoir containing 3.5 million acre-feet of water.

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The oldest operational dam in the world, the Lake Homs Dam in Syria, was built around 1300. The masonry gravity dam is over one mile long, 23 feet high, and creates Lake Homs, which still supplies water to the people of Homs today.

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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.

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Hoover Dam is one of the most iconic dams around the world, stretching between the American states of Nevada and Arizona. Originally called the Boulder Dam, this colossal structure stands at a height of 726 feet (221.4 mt), with a base width of 656 feet (200 mt) and a crest width of 46 feet (14 mt).

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The NID lists more than 91,000 dams in the U.S., of which the private sector owns 63 percent and state or local entities own 27 percent. About 14 percent of dams in the United States are owned or regulated by federal agencies.

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6. The flow of silt into the reservoir is a recognised problem which has badly affected other major hydroelectric projects in China. This has been addressed partly by reafforestation in the upper reaches of the river, but could still significantly shorten the dam's expected lifespan of 50 years.

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Situated on the Yangtze River in China, the Three Gorges Dam is the largest hydroelectric dam in the world. A Xylem solution at the dam provides data that helps prevent flooding and droughts.

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