United States Department of the Interior Bureau of Land Management Wyoming State Office Coal Lease Readjustment Serial Number WYW23929 Date Lease Issued February 1, 1971Cloud Peak Energy Inc. • August 12th, 2009 • Bituminous coal & lignite surface mining
Company FiledAugust 12th, 2009 Industry
QuickLinks -- Click here to rapidly navigate through this documentCloud Peak Energy Inc. • August 8th, 2008
Company FiledAugust 8th, 2008United States Department of the Interior Bureau of Land Management Wyoming State Office Coal Lease Readjustment Serial Number WYW23929 Date Lease Issued February 1, 1971