The coal-mining industry has been hard hit by low natural gas prices and a broad shift away from “dirty” fuels. It hasn’t been pretty, with industry giants like Peabody Energy (NYSE: BTU) forced into bankruptcy and Cloud Peak Energy (NYSE: CLD) cutting production levels by 35% between 2010 and 2016. But Alliance Resource Partners, L.P. (NASDAQ: ARLP) has stood out from the pack, despite a distribution cut.