NiSource Inc. is an energy holding company that operates through Gas Distribution Operations and Electric Operations segments. Gas Distribution operations owns five distribution subsidiaries that provide natural gas to approximately 2.4 million residential, commercial and industrial customers in Ohio, Pennsylvania, Virginia, Kentucky, and Maryland. In addition, the Company distribute natural gas to approximately 853,000 customers in northern Indiana. The Company operates approximately 54,600 miles of distribution main pipeline plus the associated individual customer service lines and approximately 1,000 miles of transmission main pipeline located in its service areas. Electric Operations generates, transmits and distributes electricity to approximately 483,000 customers in 20 counties in the northern part of Indiana and also engaged in wholesale electric and transmission transactions. The Company owns and operates sources of generation as well as source power.