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What is the hardest working river in the United States?

The upper Wisconsin River has been called the hardest working river in the nation, a title well deserved. It contains 26 hydroelectric dams with 21 storage reservoirs, more than any other stretch of river in the United States.



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Climate change, a rising population, and unsustainable consumption of water in the southwest are threatening the very existence of the Colorado River that's been running through the center of the Grand Canyon for six million years.

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If the water levels dip much lower, the Colorado's northernmost reservoir won't have enough in the tank to both fill Lake Mead downstream and generate any hydropower, which would have devastating effects on the electricity grid in the western US.

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About the Colorado River There is a Colorado River that flows through Arizona, Utah, and other western states. Ours is the “other” Colorado River—the Texas Colorado River. But here, we just call it the “Colorado River.”

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California — with the largest allocation of water from the river — is the lone holdout. Officials said the state would release its own plan. The Colorado River and its tributaries pass through seven states and into Mexico, serving 40 million people and a $5 billion-a-year agricultural industry.

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What happens if Lake Mead dries up forever? If Lake Mead were to run out of water, the Hoover Dam would no longer be able to generate power or provide water to surrounding cities and farms. The Colorado River would essentially stop flowing, and the Southwest would be in a major water crisis.

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