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Raging Rapids
In some parts of the Colorado River, huge rapids swirl through deep canyons. Brave people like to raft down the white-water rapids. Better hold on tight!
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Concrete Canyon
The Hoover Dam sits on the Arizona-Nevada border. It is the tallest concrete dam in the United States. The river below the dam is now a trickle, compared to what it once was.
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Drying Up
The once-mighty Colorado River no longer runs all the way to the sea. The river turns to a dried, cracked mud plain miles before reaching the Gulf of California.
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