You might think of the Grand Canyon as one of the wildest places in the U.S. But the fact is, the Colorado River that runs through that canyon is not wild at all. Here’s a quote from Cadillac Desert, a documentary on water in the West.
"This river, the Colorado, can be turned on and turned off down to the last drop on orders from the Interior Secretary of the United States," a voiceover tells us. "This was the first river on earth to come under complete human control."