What is the largest reservoir in the United States?

Lake Mead, Nevada Named after Bureau of Reclamation Commissioner Elwood Mead, Lake Mead is the largest reservoir in the United States, stretching 112 miles long with a total capacity of 28,255,000 acre-feet, a shoreline of 759 miles, and a maximum depth of 532 feet.



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Hoover Dam, which formed Lake Mead, is located in Black Canyon approximately 30 miles east of Las Vegas, NV in the Mojave Desert, Arizona-Nevada (Figure 1). At full pool, Lake Mead is the largest reservoir in the United States by volume and is second only to Lake Powell in surface area (Paulson and Baker 1983).

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The water in Lake Mead, the nation's biggest reservoir, has dropped more than 150 feet in the last two decades, leaving little water for the more than 40 million people who depend on the river.

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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.

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Most were built in the 40s, 50s and 60s to prevent catastrophic local flooding. The last regional dam built, the New Melones Reservoir north of Sonora was completed in 1980, about 42 years ago.

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The water levels for Lake Mead are projected to reach slightly over 1,065 feet by January 2024, according to the Bureau of Reclamation, in large part due to an extremely wet winter that eased the effects of the longstanding drought. In October 2022, the water levels were at a historic low, at roughly 1,046 feet.

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At 1,943 feet (592 meters), Crater Lake is the deepest lake in the United States and one of the deepest in the world. The depths were first explored thoroughly in 1886 by a party from the U.S. Geological Survey.

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Stretching all the way down to 1,645 feet deep, Lake Tahoe has beautiful crystal-clear waters at an elevation of 6,225 feet above sea level. Known for its phenomenal clarity, this ancient lake has the purest waters in North America, making this The Clearest Lake in the United States.

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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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