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CAM MINING. LLC <br />Munger Canyon Mine <br />Coal Mine Waste Bank Inspection -15' Quarter 2006 <br />On March 24, 2006, I performed the required quarterly visual inspection of the Munger <br />Canyon Mine coal mine waste bank in accordance with Rule 4.10.2. <br />I, J. E. Stover, P.E., have a wide variety of experience in the design and construcfion of <br />earth fill embankments. Nothing was observed during the inspection that would indicate <br />the pile has a potential for failure. The gob disposal area was dry to damp. Previous <br />inspections by the undersigned noted that all organic material and topsoil has been <br />removed ahead of the waste bank founding. The upper diversion ditch was inspected with <br />no problems noted. <br />The first coal mine waste was placed m the pde dunng the penod November 23 `' through <br />November 29. 2004. Approximately 1,270 tons were hauled to the pile during this penod. <br />The coal mine waste was leveled during the second quarter 2005. Compaction tests have <br />not been taken. No coal mine waste was hauled to the pile during the first quarter 2006. <br />Coal mine waste is to be placed in the pile in approximately horizontal lifts no more than <br />24-inches thick. The coal mine waste is spread and compactive effort is provided by a <br />front-end loader. No compaction tests were performed dunng the period. A test passes if <br />the test attains at least 90°e of the maximum dry density attained in a laboratory <br />compaction test in accordance with ASTM D698. <br />A failure of the pile would probably not be a hazard to human life. The pile is located in a <br />remote area well away from human habitation. <br />I certify that to the best of my knowledge and belief, that the fill and other aspects of the <br />Munger Canyon Mine refuse pile have been constructed as permitted in the design <br />approved by the DMG. <br />Recommended maintenance: None <br />,. <br />~. ;;~;,:-• James E Stover Date <br />"`~- Colorado Professwnal Engineer <br />. -.;~'_,-,:,..,~.~'• RegistCaUon No. 19230 <br />