San Francisco, January 13, 2012 — Pattern Energy Group announced that the California Public Utilities Commission has approved a 20-year power purchase agreement with San Diego Gas & Electric for 315 MW of wind energy to be generated at its Ocotillo Wind Energy Facility in Southern California.

The project will produce enough clean and renewable wind energy to serve more than 130,000 households a year.

Pattern has been working with the BLM and related agencies for three years in satisfying the exacting standards required to obtain the necessary permits and rights of way on BLM land.

The U.S. government has announced that facilitating permitting for renewable energy on federal lands is a key priority for the current administration and the Ocotillo project has been designated by the BLM for such consideration.

Once all permits and government approvals have been received, Pattern plans to begin construction in the first half of the year and begin generating clean power by the end of 2012, using the 500-kV Sunrise Powerlink transmission line, recently permitted by the BLM for the purpose of transmitting the abundant renewable energy potential from this area and currently under construction.

The transmission line runs directly across the project site for the 315 MW Ocotillo Wind Energy Facility, which is located near Ocotillo, Calif., in the Imperial Valley.

The Bureau of Land Management designated the Ocotillo Wind Energy Facility as one of national priority projects in 2011. The project intends to use the Recovery Act grant available to projects that achieve operation by the end of 2012.