Horizon Pipeline, a small 73-mile pipeline running from Joliet, Illinois, to McHenry County, Illinois, is owned by a partnership (KMorgan/ArcLight/Brookfield) and Nicor, and operated by Horizon Pipeline Company, LLC. Operating at the lowest utilization, Horizon mainly serves the utility/power sectors, with key clients including Nicor Gas Company and Elgin Energy Center LLC. Horizon Pipeline Company, L.L.C., is engaged in the business of transporting natural gas in the State of Illinois.