SONOMA CALIFORNIA GEOTHERMAL

How SONOMA CALIFORNIA GEOTHERMAL compares

With 78 MW of capacity, SONOMA CALIFORNIA GEOTHERMAL ranks 191st among the 874 operating power plants Bywatts maps in California and 7th of the 24 operating Geothermal plants in the state. It accounts for about 3.0% of California's operating Geothermal capacity and 0.1% of all operating capacity in the state. Nationally it is the 7th-largest of the 34 operating Geothermal plants in the database. Commissioned in 1983, it is older than 79% of the 859 operating California plants with a recorded commissioning year. Its operator, GEYSERS POWER CO LLC, runs 4 operating plants in California totaling 1,552 MW. It shares Lake County with 3 other operating plants, including CALISTOGA POWER PLANT and BOTTLE ROCK POWER.

EIA-860 lists 1 generator at the site with 78 MW of nameplate capacity, all geothermal technology. Net generation was 448 GWh in 2024 (a 65% capacity factor), up 76% from 2022.

Grid neighborhood

The nearest named substation is SONOMA 3 (230 kV), about 0.1 miles away; the closest transmission line found within 10 miles is a 230 kV line owned by PACIFIC GAS & ELECTRIC COMPANY, under 0.1 miles away. Another 11 operating power plants totaling 1,759 MW sit within 25 miles; the largest is GEYSERS UNIT 5-20 (1,273 MW, Geothermal).

Computed by Bywatts from HIFLD power plant, substation and transmission line records and EIA-860/923 survey data; distances are straight-line. Sources and methodology