This is a Geothermal Electrical Generation Facility, built by CalEnergy in association with the U.S. Navy. It's currently owned by Caithness Energy, and provides an average income of around $14,000,000/year to the Navy.

Source: GEOTHERMAL ELECTRIC POWER PRODUCTION IN THE UNITED STATES: A SURVEY AND UPDATE FOR 1995-1999
Proceedings World Geothermal Congress 2000
Kyushu - Tohoku, Japan, May 28 - June 10, 2000
Sifford, Alex and Bloomquist, R. Gordon
(See Table 6)

and data from: [url= http://www.caithnessenergy.com/geothermal.html]Caithness Energy L.L.C.[/url]

Navy 1: 90 MW Total Capacity
Unit 1: 30 MW, installed 1987
Unit 2: 30 MW, installed 1988
Unit 3: 30 MW, installed 1988
Type: Double Flash
Built by CalEnergy Company, Inc.
Currently owned by Caithness Energy, L.L.C.
Operated by: Coso Operating Co., L.L.C.
Power is sold to Southern California Edison.
Navy 1 Contract expires in 2010.

Navy 2: 90 MW Total Capacity
Unit 4: 30 MW, installed 1989
Unit 5: 30 MW, installed 1989
Unit 6: 30 MW, installed 1989
Type: Double Flash
Built by CalEnergy Company, Inc.
Currently owned by Caithness Energy, L.L.C.
Operated by: Coso Operating Co., L.L.C.
Power is sold to Southern California Edison.
Navy 2 Contract expires in 2011.

BLM East: 60 MW Total Capacity
Unit 7 30 MW, installed 1988
Unit 8 30 MW, installed 1988
Type: Double Flash
Built by CalEnergy Company, Inc.
Currently owned by Caithness Energy, L.L.C.
Operated by: Coso Operating Co., L.L.C.
Power is sold to Southern California Edison
BLM Contract expires in 2019.

BLM West: 30 MW Total Capacity
Unit 9: 30 MW, installed 1989
Type: Double Flash
Built by CalEnergy Company, Inc.
Currently owned by Caithness Energy, L.L.C.
Operated by: Coso Operating Co., L.L.C.
Power is sold to Southern California Edison
BLM Contract expires in 2019.