Related by context. Frequent words. (Click for all words.) 52 Crandall Canyon 51 MSHA 50 Sago Mine 50 Crandall Canyon mine 48 Sago 48 Mine Safety 47 trapped miners 46 Consol Energy 45 miners 44 coal seam 43 coal mine 43 Coal Mine 43 coal miners 42 Mine 42 DCNR 42 Massey Energy 42 coal mining 41 W.Va. mine 41 miners trapped 40 PennDOT 40 Manchin 40 coal mines 39 Gov. Joe Manchin 39 NIOSH 39 mine 39 West Virginia 39 Chilean miners 38 drillers 38 trapped underground 38 Rahall 37 Gov. Ed Rendell 37 DEP 36 colliery 36 cave ins 36 rescuers 36 mining 36 Marcellus shale 36 Three Mile 35 Marcellus Shale 35 CONSOL Energy 35 W.Va. 35 Mine Workers 35 emergency responders 35 Morgantown 35 Kanjorski 35 Upshur County 35 Continental Connection Flight 34 Cabot Oil 34 NTSB 34 McCloy 34 Bethlehem Steel 34 Hatfield 34 coalmine 34 Hersman 33 Clean Water Act 33 fracking 33 Interstate #W bridge 33 Consol 33 Buckhannon 33 Gov. Rendell 33 Patriot Coal 33 Dauphin County 33 mine shafts 33 Rep. Nick Rahall 33 Arch Coal 33 Pennsylvanians 33 OSHA 33 Kennecott 33 coal seams 33 Colgan Air 33 Picher 32 Deepwater Horizon disaster 32 Mollohan 32 mine shaft 32 Stricklin 32 Wheeling Pittsburgh 32 West Virginians 32 Range Resources 32 Deepwater Horizon 32 miner 32 Rendell 32 Stickler 31 Canonsburg 31 coal miner 31 Governor Rendell 31 Placer Dome 31 Weirton 31 underground workings 31 hydraulic fracturing 31 WVU 31 Allegany County 31 Beckley 31 Cleveland Cliffs 31 Morgantown W.Va. 31 WV 31 Chesapeake Energy 31 horizontal drilling 31 Colliery 31 Monongalia County 31 McAteer 31 geologists