Colorado River Basin Studies
San Rafael River
Lake Powell
White River
Dolores River
Green River
The Colorado River Basin covers about 246,000 square miles, including parts of the seven "basin States" of Arizona, California, Colorado, Nevada, New Mexico, Utah, and Wyoming and also flows into Mexico. The river supplies water to more than 35 million people in the United States and 3 million in Mexico, irrigates more than 4.5 million acres of farmland, and generates about 12 billion ki