Related by context. Frequent words. (Click for all words.) 49 mountaintop removal 46 mountaintop mining 46 impoundments 45 coal ash 45 fracking 44 mountaintop removal coal 44 hydraulic fracturing 44 hydrofracking 43 groundwater 43 DEQ 42 coal mining 41 ADEM 41 Surface Mining 41 tailings 41 MSHA 40 groundwater contamination 40 fly ash 39 dewatering 39 TDEC 39 DEP 39 uranium mining 39 sediment 39 mining 39 MDEQ 39 mercury pollution 39 mountaintop removal mining 39 mine tailings 39 radionuclides 38 contaminated groundwater 38 coal gasification 38 tritium 38 Fracking 38 mercury emissions 38 Manchin 38 wastewater discharge 38 coal mines 37 methane 37 mercury contamination 37 gravel pits 37 DRBC 37 atrazine 37 carbon sequestration 37 uranium mines 37 IDEM 37 coal 37 subsurface 37 contaminant 37 Clean Water Act 37 ADEQ 36 tailings ponds 36 coalbed methane 36 ERCB 36 coal seams 36 contaminated soil 36 manganese 36 poultry litter 36 mine 36 leachate 36 coal mine 36 contaminants 36 Sago Mine 36 CONSOL 35 DHEC 35 timber harvesting 35 coalmines 35 Yadkin River 35 aquifer 35 dams 35 EPA 35 TCEQ 35 aquifers 35 PFOA 35 Athabasca River 35 arsenic 35 Crandall Canyon 35 NIOSH 35 Mine Safety 35 tailings dam 35 Environmental Quality 34 sequestration 34 coal seam 34 UCG 34 coal fired 34 KDHE 34 watersheds 34 drilling 34 contaminated soils 34 quarry 34 Environmental Protection 34 coalfield 34 PPL Montana 34 BLM 34 reservoirs 34 hexavalent chromium 34 hog farms 33 Superfund cleanup 33 coalfields 33 coal tar 33 exploratory drilling 33 DNR 33 remediation