Nearly half of U.S. geothermal power capacity came online in the 1980s

Geothermal energy has been used to generate electricity in the United States since the early 1960s. The United States has 2.5 gigawatts (GW) of operating geothermal capacity, about half of which came online in the 1980s. EIA expects three plants with a combined capacity of 115 megawatts (MW) to come online in 2020. Nearly all U.S. geothermal capacity is located in California and Nevada.

Full article at eia.gov