In 1979 the U.S. Department of Energy (DOE) actively promoted development of geothermal energy in the "Geysers-Calistoga Known Geothermal Resource Area" (KGRA) near Calistoga, California through a variety of research programs and the Geothermal Loan Guarantee Program.
V roce 1979 americké ministerstvo pro energetiku (DOE) podporovalo rozvoj využití geotermální energie v oblasti Geysers-Calistoga Known Geothermal Resource Area poblíž Calistogy v Kalifornii pomocí vědeckých výzkumů v rámci Geothermal Loan Guarantee Program.