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Black Hills Corp. - a diversified energy company with a tradition of exemplary service and a vision to be the energy partner of choice - is based in Rapid City, S.D., with corporate offices in Denver and Omaha, Neb. The company serves 763,300 natural gas and electric utility customers in Colorado, Iowa, Kansas, Montana, Nebraska, South Dakota and Wyoming. The company's non-regulated businesses generate wholesale electricity, produce natural gas, oil and coal, and market energy. Black Hills employees partner to produce results that improve life with energy.