Form 3400-12 (November 1998) UNITED STATES DEPARTMENT OF THE INTERIOR BUREAU OF LAND MANAGEMENT FORM APPROVED OMB NO. 1004-0073 Expires: October 31,2000 Serial Number COAL LEASE WYW141435Cloud 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, 2008Form 3400-12 (November 1998) UNITED STATES DEPARTMENT OF THE INTERIOR BUREAU OF LAND MANAGEMENT FORM APPROVED OMB NO. 1004-0073 Expires: October 31,2000