Electric power in the United States was generated at 60 hertz; the power house was able to generate variable frequencies between 45 and 60 hertz, and constant frequencies of 60 and 120 hertz. This capability was not ultimately required, and all but one of the K-25 systems ran on a constant 60 hertz, the exception using a constant 120 hertz. The first coal-fired boiler was started on 7April 1944, followed by the second on 14 July 1944 and the third on 2November 1944. Each produced of steam an hour at a pressure of and a temperature of . To obtain the fourteen turbine generators needed, Groves had to use the Manhattan Project's priority to overrule Julius Albert Krug, the director of the Office of War Utilities. The turbine generators had a combined output of 238,000 kilowatts. The power plant could also receive power from TVA. It was decommissioned in the 1960s and demolished in 1995.