Black Hills Corporation is a holding company. The Company is an integrated energy company, which operates in the United States with two business groups: Utilities and Non-regulated Energy. Its Utilities Group consists of regulated Electric Utilities and regulated Gas Utilities segments, and the Company's Non-regulated Energy Group consists of Power Generation, Coal Mining, and Oil and Gas segments. Its Electric Utilities generate, transmit and distribute electricity to approximately 207,200 customers, and also distribute natural gas to over 44,200 natural gas utility customers of Cheyenne Light in and around Cheyenne, Wyoming. The Company's Non-regulated Energy Group produces and sells electric capacity and energy through a portfolio of generating plants, and produces and sells coal from its mine located in the Powder River Basin in Wyoming. It also acquires, explores for, develops and produces natural gas and crude oil in the Rocky Mountain region.