Related by context. Frequent words. (Click for all words.) 49 Arch Coal 49 valley fills 48 Surface Mine 48 longwall 47 longwall mining 47 CONSOL 46 Arch Coal Inc. 46 sulfur dioxide nitrogen oxide 46 Revett Minerals 46 coal mining 45 coal seam 45 MSHA 45 Jerritt Canyon 44 tailings dam 44 Mingo 44 Mount Emmons 44 Dry Fork 44 dewater 44 Coeur Alaska 44 mill tailings 43 mine 43 mining 43 coal slurry 43 NYSE CNX 43 tailings 43 mine tailings 43 Goldstrike 42 dewatered 42 Coalfields Expressway 42 coke ovens 42 Surface Mining 42 CNX Gas 42 Darby Mine 42 Iatan 42 heap leach pad 42 wellfield 42 Patriot Coal 42 Endako Mine 42 coal mines 42 metallurgical coal 41 mountaintop removal 41 Ovoot Tolgoi 41 situ uranium 41 Powder River Basin 41 Consol Energy 41 Mountaintop removal 41 coalfield 41 Mesabi Nugget 41 Medicine Bow 41 leach pads 41 Mine 41 ActiveMine 41 tailings impoundment 41 Scotia Mine 41 coal seams 41 Metallurgical coal 40 dewatering 40 GeoMet 40 Uranium Mine 40 Ezulwini Mine 40 mountaintop removal mining 40 mine subsidence 40 ridgetops 40 Monongalia 40 Massey Energy 40 limestone quarry 40 uranium mining 40 evaporation ponds 40 Piceance 40 coal 40 Dewatering 40 headwater streams 40 tailings disposal 40 dissolved solids 40 coal mine 39 coalmines 39 West Virginia 39 NYSE ANR 39 opencast 39 TDEC 39 Blankenship 39 draglines 39 PGM ounces 39 Cabin Creek 39 dragline 39 Aracoma 39 QR Mine 39 Taum Sauk 39 Iaeger 39 NYSE ACI 39 Peabody Energy 39 PacMag 39 uranium mines 39 Greenbrier 39 Integrated Gasification Combined Cycle 39 heap leach operation 39 Powder River 38 WCI Steel 38 Coal Mine 38 mines 38 coal gasification