http://www.newsweek.com/what-happens-if-lake-powell-becomes-dead-pool-1775390

A drought that has gripped the Southwest is creeping the nation's two largest reservoirs toward a dead pool, which would have catastrophic consequences for water users in the Colorado River's lower basin.

Falling water levels at Lake Mead and Lake Powell have been concerning for several years. Both reservoirs have troublingly low water levels at 1,054.79 and 3,524.22 feet above sea level, respectively.