The water level at Lake Mead is less than 10 feet away from rendering most of the hydroelectric turbines at the Hoover Dam inoperable. In a new projection from the U.S. Bureau of Reclamation, the water level is expected to fall below 1,035 feet next April. That figure is critical. Currently just shy of 1,042 feet, if Lake Mead falls below 1,035 feet — a level not seen since the reservoir was filled in the 1930s — it’s expected that 70% of the Ho…