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The utility in question is Xcel Energy, Colorado’s biggest, which serves 3.3 million electricity customers in the upper Midwest, Colorado, and New Mexico.

In 2016, Xcel released its Colorado Energy Proposal, which was news in itself. The utility proposed to shut down two coal plants in the state and replace their output with roughly 700 MW of solar, 1 GW of wind, and 700 MW of natural gas by 2023. That would put Xcel’s Colorado energy mix at roughly 55 percent renewables.