| '''Arch Coal''', Inc. {{NYSE|ACI}} is the second-largest [[coal]] producer in the [[United States]], claiming to contribute approximately 12% of America’s coal supply (140 million tons in [[2005]]). The company's mines are located in [[Wyoming]], [[Utah]], [[Colorado]], [[West Virginia]], [[Kentucky]], and [[Virginia]]. The corporate headquarters are in [[St. Louis, Missouri|St. Louis]], [[Missouri]]. | | '''Arch Coal''', Inc. {{NYSE|ACI}} is the second-largest [[coal]] producer in the [[United States]], claiming to contribute approximately 12% of America’s coal supply (140 million tons in [[2005]]). The company's mines are located in [[Wyoming]], [[Utah]], [[Colorado]], [[West Virginia]], [[Kentucky]], and [[Virginia]]. The corporate headquarters are in [[St. Louis, Missouri|St. Louis]], [[Missouri]]. |