Watch TV Modern Marvels Season 12 Episode 73 on 123MovieFree

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Modern Marvels Season 12 Episode 73

Modern Marvels: One of the world's largest concrete dams and largest concrete structures lies on the Columbia River in the State of Washington. Built in 1931, the Grand Coulee Dam is also one of the largest hydroelectric power plants. We'll explore this technological wonder.

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Documentary, History

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