She says that “between Lake Mead and Lake Powell

She says that “between Lake Mead and Lake Powell, you have over 50 million acre feet in storage when they’re full. So to have them both going down to quarter capacity is a pretty scary proposition. The loss of water in that reservoir system has been enormous. Go look at the bathtub rings, they’re scary.”

http://www.brookings.edu/blogs/planetpolicy/p...i=17226197