CONSOL Energy Inc. produces coal and natural gas for energy and raw material markets. The company is involved in the mining, preparation, and marketing steam coal primarily to electric power generation industry; and metallurgical coal to steel and coke producers. Its coal products comprise thermal, high volatile metallurgical, low volatile metallurgical, and other coal. In addition, the company explores for unconventional gas, including coalbed methane, Marcellus, Utica, Chattanooga, Huron and New Albany shales. As of December 31, 2011, it had approximately 4.5 billion tons of proved and probable coal reserves; and approximately 15,000 gross natural gas wells primarily in Appalachia. The company sells its natural gas principally to gas wholesalers. Further, it provides energy services, such as industrial supply services comprising distribution of mining, drilling, and industrial supplies, as well as integrated supply procurement and management services; terminal services that include storing coal or loading coal directly into vessels from rail cars; river and dock services that transport coal from river loadout facilities through towboats, harbor boats, and barges; and water services that provide water for industrial use. The company was founded in 1991 and is based in Canonsburg, Pennsylvania.