Related by context. Frequent words. (Click for all words.) 62 mine tailings 61 mill tailings 59 evaporation ponds 59 tailings 58 tailing ponds 54 radioactive waste 54 radioactive wastes 53 silt 53 topsoil 52 contaminating groundwater 52 transuranic waste 52 fly ash 51 contaminated soils 51 contaminated soil 50 toxic wastes 50 landfill 50 coal 50 Tailings 50 sediment 50 contaminated sediments 50 valley fills 50 sludge 49 toxic waste 49 uranium mines 49 polluted groundwater 48 opencast mine 48 naturally occurring asbestos 48 uranium 48 tailings impoundment 48 trona 47 mines 47 Vermiculite 47 salt domes 47 cubic yards 47 woody debris 47 radioactive material 47 unmined 47 groundwater 47 coal ash 47 quicklime 47 dredge spoils 47 crushed limestone 47 contaminate groundwater 46 radioactive 46 ore 46 pollute groundwater 46 ash 46 heap leach pad 46 lignite coal 46 Waste Isolation Pilot 46 contaminated groundwater 46 oily residue 46 soils 46 grade ores 46 quarry 46 Book Cliffs 46 midden 45 landfills 45 waste 45 nonrenewable resources 45 methane hydrates 45 coal seams 45 frac sand 45 streambeds 45 americium 45 uranium ore 45 hazardous waste 45 mine 45 manganese 45 Disposal Facility 45 tar sands 45 toxic byproducts 45 naturally occurring radioactive 45 waste repository 45 leach pads 45 dissolved solids 45 methane 45 tailings dam 45 contaminated sediment 45 Sanitary Landfill 45 gypsum 44 fracking fluids 44 radioactive materials 44 bentonite 44 slag 44 coal seam 44 mined 44 Superfund site 44 ore mined 44 contaminants 44 gravel 44 arsenic mercury 44 pig manure 44 slurry 44 fracking fluid 44 dredged material 44 gravel extraction 44 burnable 44 debris 44 mining 44 minerals