Related by context. Frequent words. (Click for all words.) 54 tin ore 52 silts 51 mines 50 mining 50 mine tailings 49 alluvial diamonds 48 evaporation ponds 48 submersible pumps 47 frac sand 47 extractors 47 draglines 47 mussel shells 47 tailings dams 46 electrostatic precipitators 46 copper ores 46 winders 46 streambeds 46 cyanide leaching 45 dredges 45 conveyer belts 45 cassiterite 45 settling ponds 45 mine 45 belt conveyor 45 tailings 45 snowmaking machines 45 vertical shafts 45 uranium mines 45 prospectors 45 heap leach pad 45 pneumatic drills 45 mill tailings 44 Catalytic converters 44 tailing ponds 44 panners 44 uranium vanadium 44 riverbeds 44 sludges 44 bauxite ore 44 gold panning 44 alluvial mining 44 silt 44 dissolved solids 44 sifters 44 coal mines 44 minerals 44 group metals PGMs 44 trona 43 sub bituminous coal 43 placer mining 43 irrigation pumps 43 tantalite 43 hydro dams 43 saltpeter 43 dewater 43 sand quarrying 43 valley fills 43 electrowinning 43 thar hills 43 shafts 42 smelting 42 tailings disposal 42 Coeur Alaska 42 silica sand 42 swarf 42 miners 42 alluvial deposits 42 cyanide leach 42 copper 42 coffee grinders 42 geoducks 42 sifter 42 dishwasher detergents 42 ore 42 gold 42 ores 42 overhead cranes 42 Minntac 42 dams 42 scrapers 42 tailings impoundment 42 hydroelectric turbines 41 intermittent streams 41 timber harvesting 41 quarries 41 copper smelting 41 uranium tailings 41 smelters 41 iron ores 41 mine shafts 41 geode 41 nickel ore 41 goldminers 41 Horizontal drilling 41 coal 41 Mountaintop removal 41 coulees 41 spray nozzles 41 placer deposits 41 sumps 41 opals