Delta Natural Gas Company Inc, formerly Delta Natural Gas Co, Inc., is engaged in distributing or transporting natural gas to approximately 36,000 customers. The Company operates in two segments: regulated segment and a non-regulated segment. The Company�s distribution and transmission systems are located in central and southeastern Kentucky, and it owns and operates an underground storage field in southeastern Kentucky. The Company transports natural gas to its industrial customers who purchase their natural gas in the open market. The Company has three wholly owned subsidiaries. Delta Resources, Inc. (Delta Resources) buys natural gas and resells it to industrial or other customers on its system. Delgasco, Inc. (Delgasco) buys natural gas and resells it to Delta Resources and to customers not on its system. Enpro, Inc. (Enpro) owns and operates production properties and undeveloped acreage.