MINNEAPOLIS–(BUSINESS WIRE)–Xcel Energy (NASDAQ: XEL), SEMCO ENERGY Gas Company (SEMCO) and Upper Peninsula Power Company (UPPCO) today announced the sale of Xcel Energy’s Michigan natural gas operations to SEMCO and electric operations to UPPCO.If approved by regulators, Xcel Energy’s 6,000 natural gas customers will be served by SEMCO, and 9,000 electric customers will be served by UPPCO. Together, these customers in Gogebic and Ontonagon counties will transition to providers with deep local