Age of Limits: 21st Century Water Management

The American Southwest as we know it does not exist without the Colorado River. This iconic river propelled the nation's drive into the arid Southwest and shaped its culture. Today, its tamed waters power city lights and fuel urban growth and agriculture; its waters slake the thirst and energy demands of 30 million people across seven states. Hoover Dam is the heart of the American west's water supply, a powerhouse for irrigation and farming in the region. But today a combination of drought and overuse have drained it half dry leaving a 135 foot high "bathtub ring" mark around Lake Mead. Will America's largest reservoir ever fill up again as the water wars between cities, farmers and nature play out? Alexandra Cousteau's Expedition Blue Planet: North America investigates in Age of Limits.