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Grand Coulee Dam is a hydroelectric gravity dam on the Columbia River in Washington, built by industrialist Henry J. Kaiser. Along with the Hoover Dam it is among the most famous dams in the United States. The reservoir it backs up is called Franklin Delano Roosevelt Lake, named after the United States president who presided over the conception and completion of the dam.

The scope and size of the dam are hard to comprehend. The dam is over a mile long and is taller than the Great Pyramid of Giza. In fact, all the pyramids at Giza could fit within the base of the Grand Coulee Dam. It is more than twice as tall as Niagara Falls.

(Source: Wikipedia)

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