“The economics will just eat the coal generation over time.”The coal sales in Montana and Wyoming were requested by Navajo Nation-owned company. There are fewer coal mines expanding their reserves, there are fewer buyers of thermal coal and there are more regulatory constraints,” the company said. In central Wyoming on Wednesday, the government will sell 440 million tons of coal next to NTEC’s Antelope Mine. Just over half of the 29 power plants served by the mine are scheduled to stop burning coal by 2035. “The U.S. has more energy in its coal reserves than any nation has in any one energy source.”No large coal power plants have come online in the U.S. since 2013.