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Grand Coulee Dam- Washington State, USA

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Uploaded by on Aug 18, 2010

One of the world's largest concrete structure, Grand Coulee Dam contains nearly 12 million cubic yards of concrete. With 12 million cubic yards you could build a sidewalk four feet wide and four inches thick and wrap it twice around the equator (50,000 miles). Coulee Dam is the largest hydropower producer in the US, fourth largest producer in the world.

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