NiSource Inc. distributes natural gas and generates, transmits and distributes electricity. The company operates transmission systems and natural gas transmission pipelines serving industrial, commercial, residential, wholesale, and other customers in various states in the US. It also owns and operates coal-fired electric generating stations, a combined cycle gas turbine (CCGT) plant, and hydroelectric generating plants. The company conducts its businesses through subsidiaries NIPSCO and NiSource Gas Distribution Group. NiSource was founded in 1847 and is headquartered in Merrillville, IN.