The Smith Mountain Lake Dam is one of the largest dams in the United States, and the process to build it required extensive engineering and time. Six years passed between the start of construction and the first generation of electricity (1959-1965), though the lake itself didn’t fully fill until the following year. The dam itself is over 800 feet long and 235 feet long. It’s tall enough to have a 17-story elevator built into the dam itself!

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