NiSource Gas Transmission & Storage companies own and operate about 15,000 miles of strategically located interstate natural gas pipelines, integrated with one of the largest underground storage systems in North America. Located in Houston, Texas, it provides energy to supply homes, businesses, power generation and other industrial needs. The company s subsidiaries include Columbia Gas Transmission, Columbia Gulf Transmission, Crossroads Pipeline, Central Kentucky Transmission Company, Hardy Storage Company and Millennium Pipeline. It serves customers in more than 15 states and offers various services including transportation and storage services.