Coso Geothermal Power Plant is a 90MW geothermal power project. It is located in California, the US. The project is currently active. It has been developed in multiple phases. Post completion of construction, the project got commissioned in December 1988.

Project Type Total Capacity (MW) Active Capacity (MW) Pipeline Capacity (MW) Project Status Project Location Project Developer
Geothermal 90 90 Active California, the US CalEnergy Generation Operating


The project was developed by CalEnergy Generation Operating and is currently owned by Atlantica Sustainable Infrastructure.

The geothermal plant is of double flash type.

Development Status

The project got commissioned in December 1988.

Power Purchase Agreement

The power generated from the project is sold to Southern California Edison under a power purchase agreement.

Contractors Involved

Mitsubishi Heavy Industries was selected to render EPC services for the Coso Geothermal Power Plant (Coso Phase I).

Fuji Electric Systems was selected as the steam turbine supplier for the geothermal power project. CalEnergy Generation, is the steam raising contractor for the project.

About CalEnergy Generation Operating

CalEnergy Generation (CalEnergy), a subsidiary of Berkshire Hathaway Energy Company is an alternative energy company that develops and produces energy from diversified fuel sources including geothermal, natural gas and hydroelectric. It generates electric power and steam in the US and the Philippines for power production and retail markets. CalEnergy provides consulting and development services for geothermal power production facilities in North America. The company has acquired the assets of Magma Power Company, assets of the US geothermal facilities and explored opportunities. It has presence in the US, the UK, Poland, Australia and the Philippines. CalEnergy is headquartered in Sioux, Iowa, the US.


All power projects included in this report are drawn from GlobalData’s Power Intelligence Center. The information regarding the project parameters is sourced through secondary information sources such as electric utilities, equipment manufacturers, developers, project proponent’s – news, deals and financial reporting, regulatory body, associations, government planning reports and publications. Wherever needed the information is further validated through primary from various stakeholders across the power value chain and professionals from leading players within the power sector.