2014-04-18_HYDROLOGY - C1996083 (2)

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BOWIE RESOURCES, LLC Bowie No. 2 Mine Coal Mine Waste Bank Nos. 1, 2, 3 & 4 Inspections — 15tQuarter 2014 On March 31, a visual inspection of the Bowie No. 2 Mine coal mine waste banks was performed by the undersigned in accordance with Rule 4.10.2. This inspection includes Gob Pile Nos. 1, 2, 3 and 4. Pile No. 1 is considered inactive. Pile nos. 2 and 4 are essentially one combined pile. Pile no. 3 is located south of Bowie Road. I, J. E. Stover, P.E., have a wide variety of experience in the design and construction of earth fill embankments. Nothing was observed during the inspection that would indicate the piles have a potential for failure. No seepage was noted at the toe of the piles. The underdrain at gob pile #3 was dry. The gob disposal areas were dry to damp. All organic material and topsoil has been removed ahead of the waste bank founding. The upper and lower diversion and collection ditches for all of the piles were inspected. Typical spring maintenance is required to remove sediment, sloughed material and a few rocks in the ditches. At gob pile #2 the first bench east of the haul road is covered with soil. The second bench east of the haul road is mostly covered with a subsoil pile. Most of the third and forth benches east of the road are covered with soil. Most of the coal mine waste was generated from the preparation plant. Approximately 239,595 tons of gob were hauled to the gob piles. All of the gob was hauled to gob pile #3 during the quarter, Coal mine waste is to be placed in the pile in approximately horizontal lifts no more than 24- inches thick. The coal mine waste is spread and compaction effort is provided by self propelled sheepsfoot compactors. There is a gob drying area at gob pile #3 where the Operator can end dump material for drying. The Operator also has the option of stockpiling gob material on the active pile during the winter months then place and compact the stockpiled gob when weather allows. The gob material is to be stockpiled in rows generally running from northwest to southeast. The rows of gob will be placed in a controlled manner and overlap will be minimized so there is space between rows to allow for drainage to the southeast. There were two rows of stockpiled gob on the east side of the pile #3. There was limited activity at gob pile #2. The Operator had just begun working the top of the pile. Forty -four (44) compaction tests were performed during the quarter, all at gob pile #3. Two of the tests failed. The failed tests passed after the areas were reworked. A test passes if the test attains at least 90% of the maximum dry density attained in a laboratory compaction test in accordance with ASTM D698. There are no outstanding density tests failures at the end of the first quarter. Se