Alta Wind Energy Center is the nation's largest wind facility.

The Alta Wind Energy Center is located in the wind resource area at the Tehachapi Pass in Kern County. It is the nation's largest wind facility. At the end of 2013, the center is expected to have a generation capacity of 1,548 megawatts (MW), producing enough electricity to power 450,000 homes.

The electricity produced is sold to Southern California Edison through a 30-year power purchase agreement that was in place beginning in 2010.

Terra-Gen Power developed nine Alta Wind Energy Center projects and owns 720 MW of the 1,320 MW of wind energy capacity now online. The remaining projects are owned by MidAmerican Energy (300 MW), EverPower (150 MW) and Brookfield Renewable Energy Partners (150 MW). Terra-Gen also owns the 228 MW of wind capacity now under construction.

See more information about Alta Wind Energy Center.

Alta Wind Energy Center in Tehachapi Pass in Kern County Technician working near truck with turnines in background Alta Wind Energy Center landscape

Photos Courtesy of Terra-Gen Power



  • The Alta projects help the local and state economy by providing:

    • Royalty payments of more than $30 million annually to Kern County farmers, ranchers and other landowners.

    • Property tax payments of more than $40 million annually.

    • State sales tax payments in excess of $200 million.

Type of Project



The initial nine Alta projects are online with an installed 1,320 MW wind energy capacity. Another 228 MW of wind capacity will be on-line by the end of 2013, increasing the center’s total to 1,548 MW.


Map of AltaWind Solar Electric Generating System in California


Alta Wind Energy Center


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