Black Hills Corporation is a diversified energy company. The Company operates with two major business groups: Utilities and Non-regulated Energy. The Company's Utilities Group consists of the Company's regulated Electric Utilities and regulated Gas Utilities segments, and its Non-regulated Energy Group consists of of its Power Generation, Coal Mining and Oil and Gas segments. The Company's Electric Utilities segment generates, transmits and distributes electricity to approximately 203,500 electric customers in South Dakota, Wyoming, Colorado and Montana and also distributes natural gas to approximately 35,500 gas utility customers of Cheyenne Light in Cheyenne Wyoming. The Company's Electric Utilities own 790 megawatts of generation and 8,599 miles of electric transmission and distribution lines, and the Company's Gas Utilities own 604 miles of intrastate gas transmission pipelines and 19,998 miles of gas distribution mains and service lines.