At least 46 coal-fired generating units at 25 power plants in 16 states will likely close, convert to natural gas, or be intentionally curtailed in 2017 and 2018 as the U.S. electricity sector moves increasingly away from coal and toward other sources of power. According to a research brief by the Institute for Energy Economics and Financial Analysis, these changes will trickle out to have an adverse impact on the coal-mining industry, eliminating about 28.2 million tons of annual demand for coal by the end of 2018, an amount worth nearly $1.1 billion delivered, at 2016 prices. Coal plants are closing in Colorado, Florida, Kentucky, Illinois, Massachusetts, Minnesota, Nevada, New Jersey, New Mexico, North Dakota, Ohio, Tennessee, Texas, Virginia, West Virginia and Wisconsin. But the impacts on coal production will be much more focused. The Powder River Basin of Wyoming and Montana and the Illinois Basin will be especially hard hit, and the two U.S. coal producers that stand to be most affected by the plant closings are the two biggest.