Related by context. Frequent words. (Click for all words.) 57 coal slurry 48 Contaminated soil 48 Taum Sauk reservoir 46 contaminating groundwater 46 pipe ruptured 46 TVA Kingston Fossil 46 highwall 46 earthen wall 45 Marsh Fork 45 prompts evacuations 45 earthen dams 45 corroded pipe 45 Herbert Hoover Dike 45 earthen dike 45 Paducah Gaseous Diffusion Plant 45 Toxic fumes 45 Wangjialing Coal Mine 45 dam spillway 45 sludge 45 earthen dam 45 Oroville Dam 44 mountaintop removal mines 44 coal ash 44 Seepage 44 Three Gorges reservoir 44 Taum Sauk 44 Cane Run 43 Swannanoa River 43 earthen barrier 43 Rubbertown 43 uranium tailings 43 Hobet 43 tailing ponds 43 red sludge 43 earthen walls 42 gallon propane tank 42 Chesapeake Appalachia 42 Edge Moor 42 Dunkard Creek 42 Radioactive waste 42 Wissahickon Creek 42 Dalles Dam 42 polluting groundwater 42 tailings dam 42 Kingston Fossil Plant 42 Mingo Logan 42 propane tanker 42 Dense smoke 42 Tokaimura 42 dewater 41 Moundsville W.Va. 41 drainfield 41 roadbeds 41 dike 41 Halaco 41 heavily polluted 41 Barton Solvents 41 chlorine leak 41 Conemaugh River 41 Grassy Creek 41 Cabin Creek 41 slag pile 41 Ammonia leak 41 phosphate mines 41 Stillhouse 41 Tangjiashan quake lake 41 Minntac 41 roadbed 41 Highly radioactive 41 mine tailings 40 No.3 reactor 40 Drifting snow 40 toxic sludge 40 pollute waterways 40 freshet 40 Shippingport 40 Pacaya volcano 40 Buford Dam 40 Train derailment 40 chimney stacks 40 anhydrous ammonia leak 40 coke ovens 40 creekbed 40 Grundy Va. 40 Milltown Dam 40 Baytown refinery 40 zinc smelting 40 Rancocas Creek 40 suspected carcinogen 40 raw sewage spilled 40 feedwater 40 MOUNDSVILLE 40 Darby Mine 40 Catlettsburg 40 slag heap 40 Sulfuric acid 39 fly ash 39 dam 39 penstock 39 mine subsidence 39 Peeks Creek