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List view record 1: Modern Marvels. Episode 4, Grand Coulee DamList view anchor tag for record 1: Modern Marvels. Episode 4, Grand Coulee Dam
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Modern Marvels. Episode 4, Grand Coulee Dam

2022
The world's largest concrete dam--and the largest concrete structure in the world--lies on the Columbia River in the State of Washington. B uilt in 1931, it is also one of the largest hydroelectric power plants in the world.
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