Mine Refuse definition
Mine Refuse means gob, coal, rock, slate, shale, mill tailings, boney, clay, pyrites and other unmerchantable solid or slurry material intended to be discarded that results from cleaning and preparation of mined materials at a preparation plant or washery. It includes sludge or other precipitated matter produced by the treatment of acid mine drainage but does not generally include sediment from alkaline mine drainage. The term also includes acid-producing spoil.