Public Service Enterprise Group Incorporated, through its subsidiaries, operates in the energy industry primarily in the northeastern and mid Atlantic United States. The company primarily operates as a wholesale energy supply company that integrates its generating asset operations through its wholesale energy, fuel supply, energy trading, and marketing and risk management activities. It operates nuclear, coal, gas, and oil-fired generation facilities. The company also involves in the transmission of electricity and distribution of electricity and natural gas to residential, commercial, and industrial customers, as well as invests in the development of solar generation projects and energy efficiency programs. In addition, it owns and operates domestic projects engaged in the generation of energy; and offers appliance services and repairs to customers. As of December 31, 2010, it owned approximately 13,538 megawatts of generation capacity. The company also owned and operated approximately 17,608 miles of gas mains, 12 gas distribution headquarters, and 2 subheadquarters, as well as 62 natural gas metering and regulating stations. Public Service Enterprise Group was founded in 1985 and is based in Newark, New Jersey.