1903 coal gas ignited in the Chimney Springs mine, killing 169 of the miners. In 1908, the same mine exploded again, trapping 18 miners inside. The state mine inspector and 40 other men entered the mine to rescue the miners, while the men were at work trying to rescue the miners, another explosion occurred, killing all 59 of those inside. See also Black Thunder Coal Mine Powder River Basin References External links Wyoming Mining Association - Wyoming Coal Wyoming Mining Industry - An In-depth Analysis (1998) Category:Mining in Wyoming . Category:Economy of Wyoming Category:Environment of Wyoming Category:Geology of Wyoming