For the last several weeks more or less they've been dumping 21,320 cubic feet per second -
Cubic foot of water = 7.5 gallons
21,320 cu. ft. x 7.5 gallons = 159,900 gallons per second. = 9,594,000 gallons per minute = 575,640,000 gallons per hour = 13,815,360,000 gallons per day.
Meanwhile, the lake level has not wavered by more than 6 inches off of 690 feet above sea level.
Wow.