Alta Wind Energy Center

Alta Wind Energy Center
Z22 · CC BY-SA 3.0 · source
Name	Alta Wind Energy Center
Country	United States
Location	Kern County, Tehachapi Mountains, Mojave Desert
Status	Operational
Commissioned	2010–2014
Owner	Terra-Gen Power; previously BrightSource Energy/BP partners
Operator	Terra-Gen Power
Ps units operational	292 turbines (approx.)
Ps electrical capacity	1,020 MW
Ps annual generation	~2.4 TWh (approx.)

Alta Wind Energy Center is a large-scale onshore wind power complex sited in the Tehachapi region of Kern County in the Mojave Desert. Developed and brought online during the early 2010s, it became one of the largest wind farms in the United States by installed capacity, contributing to California’s renewable energy mix alongside projects such as Ivanpah Solar Power Facility and Topaz Solar Farm. Its scale, grid integration, and multisectoral impacts attracted attention from entities including California Energy Commission, PG&E, LADWP, and California Independent System Operator.

Overview

The complex occupies several thousand acres across multiple ridge lines in the Tehachapi Mountains near the town of Tehachapi and uses dozens of wind turbine models supplied by manufacturers like Suzlon, Siemens Gamesa, and General Electric. With an installed capacity of about 1,020 megawatts, the facility’s output complements other large renewable installations such as the Altamont Pass Wind Farm and Rosamond Wind Farm for regional power balancing with Intermountain Power Plant and hydroelectric resources like Hoover Dam. Contracts and power purchase agreements with utilities including Southern California Edison and PG&E were central to its commercial viability.

History and Development

Initial proposals for large-scale wind development in the Tehachapi region date back to earlier projects such as Altamont Pass Wind Farm and the pioneering activities of firms like Aeolus. The Alta project was advanced by developers including Terra-Gen Power and earlier partners such as BP and BrightSource Energy, with permitting involving agencies like the California Energy Commission and local entities in Kern County and the City of Los Angeles for transmission rights. Construction phases ran through 2010–2014, mirroring the build-out timeline of contemporaneous projects like Shiloh Wind Power Project. Financing structures combined equity from private firms and long-term power purchase agreements with utilities such as Southern California Edison and LADWP, similar to arrangements used by NextEra Energy Resources in other projects.

Facilities and Technology

The complex comprises multiple contiguous wind farms sited along ridgelines in the Tehachapi Mountains, employing onshore variable-speed, three-bladed horizontal-axis wind turbines with tubular steel towers, blades from suppliers like Vestas and Suzlon, and generators from General Electric. Electrical collection systems step up voltage at substations before interconnection to high-voltage lines operated by California Independent System Operator and transmission owners like PG&E and Southern California Edison. Energy storage experiments and integration studies have referenced technologies from companies such as Tesla, Inc. and AES Corporation for firming renewable output. Operations and maintenance practices draw on remote monitoring, SCADA systems, and supply-chain partnerships similar to those used by Iberdrola Renewables and Ørsted.

Environmental and Economic Impacts

Environmental reviews considered effects on protected species including California condor habitat concerns and migratory patterns of raptors associated with cases studied by The Peregrine Fund and regulatory oversight by United States Fish and Wildlife Service. Mitigation measures mirrored practices used at Altamont Pass Wind Farm and Tehachapi Wind Resource Area to reduce avian mortality, including siting, curtailment strategies, and habitat conservation with stakeholders like Audubon Society chapters and The Nature Conservancy. Economic impacts included local employment during construction similar to workforce patterns observed at Ivanpah Solar Power Facility, land-lease payments to private landowners in Kern County, increased tax revenues for Kern County Board of Supervisors jurisdictions, and long-term operations jobs held by technicians often recruited through community colleges such as Bakersfield College. The project contributed to California Renewables Portfolio Standard goals and supported decarbonization efforts parallel to initiatives by California Air Resources Board and municipal decarbonization plans in Los Angeles.

Ownership and Operations

Ownership consolidated under Terra-Gen Power after initial project phases; prior investment and development partners had included BP (company), BrightSource Energy, and various private-equity stakeholders. Commercial operation and asset management responsibilities rest with operator entities experienced in utility-scale renewables akin to NextEra Energy Resources and Enel Green Power. Power purchase agreements with utilities like Southern California Edison and LADWP provide revenue streams comparable to contracts seen in projects developed by EDF Renewables. Ongoing operational considerations include turbine repowering, life-extension programs, and potential hybridization with battery storage—options explored by developers and grid operators including California Independent System Operator and California Public Utilities Commission to enhance reliability for regional customers such as LADWP and PG&E.

Category:Wind farms in California Category:Renewable energy in California