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CAM MINING, LLC <br />Munger Canyon Mine <br />Coal Mine Waste Bank Inspection - 4~' Quarter 2007 <br />On December 22, 2007, 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 construction 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 covered with about 6-inches <br />of snow. Previous inspections by the undersigned noted that all organic material and <br />topsoil has been removed ahead of the waste bank founding. The upper diversion ditch <br />was not inspected because of the snow cover. The pile has been covered with 3.5 feet of <br />non-toxic cover, 6-inches to topsoil, extensively roughened, seeded and mulched. <br />The first coal mine waste, 1,270 tons, were placed in the pile during the period November <br />23rd through November 29, 2004. The coal mine waste was leveled during the second <br />quarter 2005. Approximately 880 tons were hauled to the gob pile and compacted during <br />April 2006. The Operator hauled approximately 620 tons of material to the pile during the <br />quarter (March 2007) from the McClane Canyon Mine material drying area. During the 2~d <br />quarter 2007 approximately 3750 tons were hauled to the gob pile. This material was <br />generated from the portal reclamation project. <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. A test passes if the test attains at least 90% of the maximum dry density <br />attained in a laboratory compaction test in accordance with ASTM D698. No coal mine <br />waste was hauled to the gob pile during the 3rd quarter 2007. No further material will be <br />hauled to the gob pile since it has been reclaimed. <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 />Q~~®~ <br />Munger Canyon Mine refuse pile have been constructs ~~~d in the design <br />~ o~~,~,p <br />approved by the DRMS. v ~~®~~~~I ~. ST~~~~~® ~ <br />Recommended maintenance: None ~ ®~ ~~..~~i ®~~ <br />® „J~ ~# <br />~-a ~ Z v'~ ~ R,.p <br />~~, <br />Jam ~ ®~~,~ov~;ra c~~a4~ Date <br />Colora ~~fi~sr4al Engineer <br />Registration Flo. 19230 <br />