2015-10-19_HYDROLOGY - C1996083 (2)

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and weather conditions allow. A very small amount of end dumped gob was present in on the western edge of the top of the pile. The westernmost and easternmost sections of gob pile #3 serve as drying areas for end dumped material. The purpose of the gob drying area is to provide an area for temporary storage of gob for drying purposes. End -dumped gob in the gob drying areas is worked with dozers and track hoes to assist in the drying process. The Operator removed gob from the eastern and western drying areas and placed it on top of gob pile #3. At gob pile #3 it is necessary to stockpile gob material during the winter months then place and compact the stockpiled gob when weather allows. Stockpiling of gob can commence November 15 and end April 15. Winter stockpiled material will be re - handled and compacted by September 30. Beginning on October 1, the Operator should be compacting all material concurrently, until conditions again require stockpiling. The stockpiling dates listed above should be considered flexible and may change slightly from year to year based on weather conditions. The gob material will 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 (2) rows of stockpiled gob at gob pile #3 during the inspection. The stockpiled gob was from recently placed gob from both the drying areas, and, stockpiling that was necessary due to recent rains. Gob pile #2 has one steep area. It is located in the central section of the pile. This area is steep because the Operator was placing gob in the area and was tying the gob into existing gob and natural ground. There is a steep slope on the west side of the first bench on gob pile #1, constructed at 1.5H:1 V, but a variance request (TR -97) was approved on June 22, 2015 and therefore no longer an issue that will be mentioned in forthcoming gob pile inspection reports. The available volume of coverfill material is sufficient to meet the requirements of Rule 4.10.4(5). No coverfill was used for blending or other uses during the quarter. A failure of the gob pile no. 1 would probably not be a hazard to human life. The pile is located above a large flat bench. The bench is approximately 80 to 150 -feet wide directly below the pile. Additionally, the gob pile sediment pond is located below the pile. If the coal mine waste bank failed, the material would very likely be contained on the bench below the pile and or within the gob pile sediment pond. A failure of gob pile no. 2 would probably not be a hazard to human life. A residential dwelling is located over 300 -feet below pile no. 2. The piles are located above Bowie Road. A failure of the piles might damage Bowie Road and the Fire Mountain Canal but would not likely impact the residential dwelling. -2-