Tri-State is closing its coal-fired power plants in Colorado, New Mexico The Citizen 6 years ago The nonprofit will shutter its northwest Colorado coal mine too, it says. Source: The Business Journal Share this: Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook What’s next for New Mexico’s energy future as utility transitions away from coalDateJuly 8, 2019In relation toPolvaderaMexico's president revived dangerous form of coal mining | KRQE News 13DateAugust 28, 2022In relation toPolvaderaRetirement of San Juan coal plant clears final hurdles after PRC approvalDateSeptember 22, 2023In relation toPolvadera