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 investigates.
Directed by Alexandra Cousteau.