Arch Coal Named Among Top Business Technology Innovators; Earns Eighth Consecutive InformationWeek 500 Award

ST. LOUIS, Sept. 11, 2013 /PRNewswire/ -- Arch Coal, Inc. (NYSE:ACI) today earned a spot in the 2013 InformationWeek 500. This marks the eighth consecutive year that Arch Coal has been ranked one of the nation's most innovative users of business technology by InformationWeek. (Logo:...