June 1942. "Eight units in generator hall of a new addition to TVA's hydroelectric plant at Wilson Dam, Sheffield vicinity, Alabama." Much, if not most, of the energy from the huge Tennessee Valley Authority hydroelectric projects undertaken during the war was used to run the uranium enrichment plants at the government's secret atom-bomb facility in Oak Ridge. View full size. 4x5 Kodachrome transparency by Alfred Palmer for the Office of War Information.