Related by context. Frequent words. (Click for all words.) 49 subsidence 49 sinkholes 47 seepage 47 landslides 46 rockfall 44 Crandall Canyon 42 miners 42 flooding 42 mudslides 42 collapses 41 mine shafts 40 leaks 40 derailments 39 flash floods 39 embankments 39 coal mine 39 mine 38 avalanches 38 heavy rains 38 flash flooding 38 Mine Safety 38 mudslide 38 sinkhole 38 floods 38 Landslides 37 trapped miners 37 tunnels 37 Crandall Canyon mine 37 rockslide 37 miners trapped 37 coal mines 37 washouts 36 MSHA 36 accidents 36 ruptures 36 retaining walls 36 miner 36 drainage 36 lightning strikes 36 mines 36 rainstorms 35 tunneling 35 dikes 35 depressions 35 excavation 35 coalmine 35 Sago Mine 35 passageways 35 Flooding 35 excavations 35 rupture 35 underground 35 shaft 35 occurrences 35 manholes 34 trench 34 collapse 34 explosions 34 trapped underground 34 coal miners 34 inundation 34 mining 34 corrosion 34 seep 34 leaky roof 33 mine shaft 33 levee 33 cave 33 cavern 33 Sago 33 torrential downpours 33 rains 33 earthen 33 heavy rainfall 33 downpours 33 corroded 33 earthen dam 33 geotechnical 33 coal seam 33 seismic activity 33 earthquakes 32 leakage 32 dike 32 coal mining 32 torrential rains 32 fissures 32 soil erosion 32 Mudslides 32 cracks 32 disasters 32 caves 32 fractures 32 localized flooding 32 grout 32 blowouts 32 Coal Mine 32 spills 32 erosion 32 breakdowns 32 intrusions 32 manhole