Related by context. Frequent words. (Click for all words.) 73 tailings 55 contaminated soils 54 leaching 54 fly ash 54 tailings dam 53 contaminated soil 52 heap leaching 52 tailings pond 52 heap leach 52 contaminated groundwater 52 sediment 52 toxic wastes 51 toxic waste 50 coal slurry 50 quarry 50 dredged material 49 tailings ponds 49 mining 49 groundwater 49 groundwater contamination 49 Superfund site 49 leach pad 49 sludge 49 leach 48 underground workings 48 ore 48 mine 48 uranium mines 48 mines 48 alluvial gold 48 silt 48 laterite 47 contaminated sediment 47 dumpsite 47 gravel pits 47 gravel pit 47 dewatering 47 sanitary landfill 47 mine workings 47 mine shafts 47 landfill 47 sulfide 46 placer gold 46 effluent 46 Jerritt Canyon 46 reclamation 46 Mine 46 sediments 46 quarries 46 Superfund cleanup 45 coal ash 45 hazardous waste 45 drainages 45 Superfund sites 45 streambed 45 Buyat Bay 45 gravel 44 landfills 44 dumpsites 44 toxic pollutants 44 arsenic 44 mined 44 leachate 44 stopes 44 adit 44 smelting 44 topsoil 43 adits 43 gravels 43 Kennecott 43 cyanide 43 slag 43 Newmont 43 Sediment 43 lagoons 43 smelter 43 molybdenum 43 Teck Cominco 43 slurry 43 asbestos contamination 42 pollutants 42 watersheds 42 ore mined 42 radioactive waste 42 toxic chemicals 42 Superfund 42 Clean Water Act 42 contaminants 42 treated effluent 42 sewage sludge 42 mill throughput 42 stope 42 Copper Mine 42 headwaters 42 soils 42 biosolids 42 asbestos 41 Sludge 41 copper smelter 41 PCBs 41 metallurgical testwork