From the 2025 Predictions:

"50% chance that Lake Mead reservoir levels will drop too low to allow hydroelectric power generation at Hoover Dam by 2017." 

Well, let's see how this one comes out this year.

This is 'science', after all.  Science is about predictability.

Level today: 

 1,088.39
Feet MSL

Friday, March 31, 2017
   9:00:00 AM
Level is 140.61 feet
below full pool of 1,229.00

http://mead.uslakes.info/level.asp