National Fuel Gas Company is an integrated energy company engaged in the production, gathering, transportation, storage and distribution of natural gas. Its Integrated Upstream and Gathering segment is engaged in the exploration for and development of natural gas reserves in the Appalachian region. It also builds, owns and operates natural gas processing and pipeline gathering facilities in the region. Its Pipeline and Storage segment provides interstate natural gas transportation services for affiliated and nonaffiliated companies through integrated natural gas pipeline systems in Pennsylvania and New York. It also provides storage services through its underground natural gas storage fields and provides storage service (via lease with Supply Corporation) to a nonaffiliated company. Its Utility segment sells natural gas to retail customers and provides natural gas transportation services in western New York and northwestern Pennsylvania. Its utility customer base has over 1.1 million.