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BOWIE RESOURCES, LLC <br />Bowie No. 2 Mine <br />Coal Mine Waste Bank Nos. 1, 2 & 4 Inspections - 2nd Quarter 2010 <br />On June 30, 2010, 1 performed a visual inspection of the Bowie No. 2 Mine coal mine waste <br />banks in accordance with Rule 4.10.2. This inspection includes Gob Pile Nos. 1, 2 and 4. <br />I, J. E. Stover, P.E., have a wide variety of experience in the design and construction of earth <br />fill embankments. Nothing was observed during the inspections that would indicate the piles <br />have a potential for failure. The gob disposal areas were damp to dry. All organic material <br />and topsoil has been removed ahead of the waste bank foundings. The upper diversion <br />ditches were inspected with no problems noted. <br />A significant amount of the gob pile no. 2 was covered with three feet of cover and one foot <br />of topsoil during the 4th quarter 2006. Most of the first and second benches were covered. <br />Cover material from gob pile no. 4 is stockpiled on the west side of pile no. 2. Cover material <br />is being removed from the east end of bench number two (pile no. 2) in order to facilitate <br />increasing the slope inclination from 5h:1 v to 3h:1 v. (TR-61) <br />Most of the coal mine waste was generated from the preparation plant. Approximately <br />63,500 tons of gob were hauled to the gob piles. Coal mine waste is to be placed in the pile <br />in approximately horizontal lifts no more than 24-inches thick. The coal mine waste is <br />spread and compactive effort is provided by a self propelled sheepsfoot compactor. Thirty- <br />six (36) compaction tests were performed during the quarter. A test passes if the test attains <br />at least 90% of the maximum dry density attained in a laboratory compaction test in <br />accordance with ASTM D698. One test failed on June 24th (#4532). This area will be <br />reworked and tested next month. <br />A failure of the gob pile no. 1 would probably not be a hazard to human life. The pile is <br />located above a large flat bench. The bench is approximately 80 to 150-feet wide directly <br />below the pile. Additionally, the gob pile sediment pond is located below the pile. If the coal <br />mine waste bank failed, the material would very likely be contained on the bench below the <br />pile and or within the gob pile sediment pond. <br />A failure of the gob piles no. 2 and 4 would probably not be a hazard to human life. A <br />residential dwelling is located over 300-feet below pile no. 2. The piles are located above <br />Bowie Road. A failure of the piles might damage Bowie Road but would not likely impact the <br />residential dwelling. <br />®,®s ®? <br />I certify that to the best of my knowledge and belij4®i??,ilR'?hd other aspects of the coal <br />mine waste banks have been constructed as pein?th6,4si'approved by the DRMS. <br />1 G. <br />1 <br />• -n <br />Ames E. Stove Date <br />%worado,_Pro sional Engineer <br />Ow tioa ,? lb. 19230