#Colorado's decoalification over the next six years.
People tend not to think about it, but coal and steel were the original main industries that built the Colorado front range. Boulder County in particular hosts a massive coal field a few hundred feet down. Most Colorado coal mines closed in the 1950s, as they were replaced with cheaper strip mines of near-surface deposits in Wyoming.
But the coal plants have remained, for another few years yet. Some have been converted to natural gas (like the Valmont plant in Boulder), and some are just being shut down as the state finally turns the "300 days of sunshine" into usable solar power.
https://coloradosun.com/2024/08/27/colorado-coal-fired-power-plants-closing/