How many gallons of water are there in Lake Mead as of today, 6/28/11?

Since the water level keeps going down its hard to keep track everyday of just how low are lake is sinking. Ive been here 26 years and used to be able to fish out at boxcar cove, Now you can walk 50 feet out on the rocks that used to be under water. This was an awsome fishing sight But no more