The Fort Peck Dam is one of the largest dam, located in northeast Montana in the United States, near Glasgow, and adjacent to the community of Fort Peck. At 21,026 feet (6,409 m) in length and over 250 feet (76 m) in height, it is the largest man-made lake in the U.S.
http://worldmost.org/largest-dam
The nearly 8100 major dams in the United States in 2006. The National Inventory of Dams defines a major dam as being 50 feet (15 m) tall with a storage capacity of at least 5,000 acre feet (6,200,000 m 3), or of any height with a storage capacity of 25,000 acre feet (31,000,000 m 3). The following is a partial list of dams and reservoirs in the United States. There are an estimated 75,000 dams in the United States, impounding 600,000 mi (970,000 km) of river or about 17% of rivers in the nation. This list is incomplete; you can help by expanding it.
https://en.wikipedia.org/wiki/List_of_reservoirs_and_dams_in_the_United_States
1 Chickamauga Dam — Chickamauga Lake; on the Tennessee River; built 1940 by the TVA. 2  Chilhowee Dam on the Little Tennessee River; built in 1957 and owned by Alcoa. 3  Cordell Hull Dam — Cordell Hull Lake; on the Cumberland River; finished in 1973 by the United States Army Corps of Engineers.
https://en.wikipedia.org/wiki/List_of_reservoirs_and_dams_in_the_United_States
A lot of dam in the world and there are largest dam with largest structure volume. A dam is a barrier that impounds water or underground streams. Dams generally serve the primary purpose of retaining water, while other structures such as floodgates or levees.
http://worldmost.org/largest-dam
Many other rock and earthfill dams have surpassed Hoover in height. There is one dam in the United States taller than Hoover Dam, and that is the Oroville Dam on the Feather River in California. It stands 770 feet (235 meters) tall, but it is an earthfill dam, not a concrete structure like Hoover.
http://www.usbr.gov/lc/hooverdam/history/essays/biggest.html
List of largest dams in the world. For the Tallest dam in the world, see List of tallest dams in the world. For the largest reservoirs in the world, see List of reservoirs by volume. The following table lists the largest man-made dams in the world by volume of fill/structure. By general definition, a dam is a barrier that impounds water or underground streams, hence tailings dams are relegated to a separate list.
https://en.wikipedia.org/wiki/List_of_largest_dams
The largest hydroelectric plant in the United States is at Grand Coulee Dam. Its three powerplants have a capacity of 6,809 MW, and it generates, on average, about 21 billion KWh, while Hoover Dam's powerplant has a capacity of 2,074 MW and generates approximately 4 billion KWh a year.
http://www.usbr.gov/lc/hooverdam/history/essays/biggest.html
World's Tallest Dam. Currently, the tallest dam in the world is Nurek Dam on the Vakhsh River in Tajikistan. It is 984 feet (300 meters) tall. Hoover Dam is 726.4 feet (221.3 meters) tall. Today, Hoover Dam still ranks in the top 20 of the tallest dams in the world, but only in the concrete gravity and arch categories.
http://www.usbr.gov/lc/hooverdam/history/essays/biggest.html
Oroville Dam. Largest Dams Oroville Dam. Oroville Dam spans the Feather River about 5 miles (8.0 km) northeast of the city of Oroville, California. The largest dam lies in the foothills of the Sierra Nevada, and at 770 feet (230 m) tall, is the tallest dam in the United States.
http://worldmost.org/largest-dam
Tarbela Dam on the Indus River in Pakistan is the second largest dam in the world by structural volume and the largest earth filled dam in the world. The dam is 485 feet (148 m) high above the riverbed. The dam forms the Tarbela Reservoir, with a surface area of approximately 250-square-kilometre (97 sq mi).
http://worldmost.org/largest-dam
biggest dam in united states
The Fort Peck Dam is the biggest dam in the United States.