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. Gaseous diffusion plant A site for the K-25 facility was chosen near the high school of the now-abandoned town of Wheat. As the dimensions of the K-25 facility became more apparent, it was decided to move it to a larger site near Poplar Creek, closer to the power plant. This site was approved on 24 June 1943. Considerable work was required to prepare the site. Existing roads in the area were improved to take heavy traffic. A new road was built to connect the site to US Route 70, and another, long, to connect with Tennessee State Route 61. An old ferry over the Clinch River was upgraded, and then replaced with a bridge in December 1943. A railroad spur was run from Blair, Tennessee, to the K-25 site. Some of sidings were also provided. The first carload of freight traversed the line on 18 September 1943. It was initially intended that the construction workers should live off-site, but the poor condition of the roads and a shortage of accommodations in the area made commuting long and difficult, and in turn made it difficult to find and retain workers. Construction workers therefore came to be housed in large hutment and trailer camps. The J. A. Jones camp for K-25 workers, known as Happy Valley, held 15,000 people. This required 8dormitories, 17 barracks, 1,590 hutments, 1,153 trailers and 100 Victory Houses. A pumping station was built to supply drinking water from the Clinch River, along with a water treatment plant. Amenities included a school, eight cafeterias, a bakery, theater, three recreation halls, a warehouse and a cold storage plant. Ford, Bacon & Davis established a smaller camp for 2,100 people. Responsibility for the camps was transferred to the Roane-Anderson Company on 25 January 1946, and the school was transferred to district control in March