Related by context. Frequent words. (Click for all words.) 48 Arch Coal 48 ROCK SPRINGS 47 Gillette Wyo. 47 GREAT FALLS Mont 46 Intermountain Gas 46 Arch Coal Inc. 45 Westmoreland Coal 45 Blankenship 45 Kruckenberg 45 Powder River 45 Livingston Mont 45 RAWLINS 45 Kemmerer 44 Sidney Mont 44 Peabody Energy 44 Cracraft 44 Blackfoot Idaho 44 Poncha Springs 44 Medicine Bow 43 coal miner 43 Harlan 43 Richins 43 Boruff 42 De Beque 42 Springs Colo. 42 Naturita 42 GREEN RIVER 42 Cheyenne 42 coal mining 42 Wyoming 42 Wyo. 42 Rulison 42 Shelocta 42 Gunnison 42 Chaffee 42 Letcher 42 Elkview 42 Wataga 42 Centralia 41 Malcomb 41 Nucla 41 Eckley 41 COLO 41 Colstrip 41 Gallatin 41 Caudill 41 Hysham 41 Lander Wyo. 41 Routt County 41 coal 41 Hot Sulphur Springs 40 Powell Wyo. 40 Creede 40 Patriot Coal 40 Ceresco 40 Saguache 40 Heinlen 40 coal mines 40 Billings 40 Elk 40 Beartooth Mountains 40 MDU Resources Group 40 GLENWOOD SPRINGS Colo. 40 Wyo 40 Layne 40 Hausauer 40 Tweeten 40 GILLETTE 40 Raulston 40 Stillwater Mining Co. 40 Electric Coop 40 coal mine 39 BUTTE Mont 39 Laramie 39 Glendive Mont 39 Big Piney 39 Powder River Basin 39 Surface Mine 39 Cloud Peak 39 DeBeque 39 Paonia 39 Usibelli 39 CASPER 39 rancher 39 Puffenbarger 39 Ketchem 39 northcentral Montana 39 Highlands Conservancy 39 Grand Junction 39 Lopp 39 Monnig 39 Bridger 39 Elk Creek 39 Dry Fork 39 Greybull 39 Casper Wyo. 39 ROCK SPRINGS Wyo. 39 Kremmling 39 Beckley 39 Carbondale 39 Driggs