There are four steam generators consisting of two spreader-stoker coal units, one oil/gas-fired unit, and one fluidized-bed coal boiler for a combined maximum capacity of 769,000 pounds per hour at 650 psi. The spreader stoker fired units are equipped with mechanical collectors and electrostatic precipitators for particulate emissions control. The Circulating Fluidized Bed boiler incorporates combustion with limestone to control sulfur dioxide emission and a bag house to capture particulate emissions.