Black Hills Corporation is a holding company. The Company is an integrated energy company, which is focused primarily on regulated utilities. The Company operates through segments, including Electric Utilities, Gas Utilities, Power Generation, Mining, and Corporate. The Electric Utilities segment is engaged in generating, transmitting and distributing electricity to its customers in South Dakota, Wyoming, Colorado and Montana. The Gas Utilities Segment includes the natural gas operations of Cheyenne Light. The Power Generation segment produces electric power from its generating plants and sells the electric capacity and energy principally to its utilities under long-term contracts. The Mining segment operates through its Wyodak Resources Development Corp. (WRDC) subsidiary.