Related by context. Frequent words. (Click for all words.) 56 evaporation ponds 51 tailing ponds 50 intermittent streams 50 polluted groundwater 50 sludges 49 sediment 49 sewage lagoon 49 mine tailings 49 sewage effluent 48 topsoil 48 silts 48 bottomland 48 headwater streams 48 settling ponds 48 landfill 48 crushed limestone 48 drainage basins 48 tailings 48 streambeds 48 contaminated soil 48 lagoons 48 silt 48 contaminated soils 48 Sediments 48 Sediment 48 contaminating groundwater 47 forested wetlands 47 Conemaugh River 47 shallow aquifer 47 mill tailings 47 Creek tributary 47 contaminated sediments 47 uranium tailings 47 creeks streams 46 retention basin 46 tailings dams 46 Superfund site 46 embayment 46 clarifiers 46 wastewater effluent 46 Codorus Creek 46 drainage pipes 46 lakebed 46 pumphouse 46 Sheep Creek 46 dewatered 46 stormwater discharge 46 retention basins 46 Stormwater runoff 46 corroded pipes 46 heap leach pad 45 dredge spoils 45 dredged material 45 Tailings 45 overgrown vegetation 45 rainwater runoff 45 sludge 45 manure piles 45 dissolved solids 45 Dunkard Creek 45 drainage ditches 45 rotting vegetation 45 leachate 45 baled hay 45 revegetate 45 lineal feet 45 Sanitary Landfill 45 roadbed 45 ultraviolet disinfection 45 Topsoil 45 flammable vegetation 45 detention basins 45 coke ovens 44 sediment runoff 44 floodplain 44 contaminants 44 overgrown brush 44 sanitary sewer overflows 44 woody debris 44 ridgetops 44 watermains 44 diked 44 beaver pond 44 silt fences 44 riparian buffer 44 outfall pipe 44 sewage lagoons 44 stormwater drain 44 sewer mains 44 highwall 44 riparian vegetation 44 slag heap 44 roadbeds 44 windrows 44 groundwater extraction 44 bioswales 44 culverts 44 PCBs polychlorinated biphenyls 44 limestone quarry 44 coulees 44 impoundments