Sempra Energy is a holding company. During the year ended December 31, 2011, Sempra Energy�s business was organized in five segments: San Diego Gas & Electric Company (SDG&E), Southern California Gas Company (SoCalGas), Sempra Generation, Sempra Pipelines & Storage and Sempra LNG (liquefied natural gas). Sempra Generation, Sempra Pipelines & Storage and Sempra LNG are subsidiaries of Sempra Global. Sempra Global is a holding company for most of its subsidiaries. As of December 31, 2011, SDG&E owed and operated four natural gas-fired power plants: a 560-megawatt electric generation facility (the Palomar generation facility) in Escondido, California; a 495-megawatt electric generation facility (the Desert Star generation facility) in Boulder City, Nevada; a 47.6-megawatt electric generation peaking facility (the Miramar I generation facility) in San Diego, California, and a 48.6-megawatt electric generation peaking facility (the Miramar II generation facility) in San Diego, California.