2014-07-03_PERMIT FILE - C1981035A (6)

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faults or strata displacements. The coal is strong and pillars are structurally competent showing a lack of squeezing (crushing) or rib spalling. The mine floor does not buckle due to stress from the overburden and because the water table is lower than the seams, pore water pressure is non - existent. The immediate mine roof consists of thinly laminated shales and sandstones. These beds rise up to the base of the Cliff House sandstone an average of twenty feet above the coal seam. The thick Cliff House sandstone provides a great deal of ground stability and generally prevents subsidence from reaching the surface after pillars are extracted during second mining. STRATIGRAPHIC CROSS - SECTION Regional and project area cross sections are shown on Map King II -004 and King II -008, and contained in the NEDO Project Geologic Report excerpts (Appendix 4). EXPLORATION CORE DRILLING GCC proposes to drill up to 9 exploration holes, numbered CO -14 -01 thru CO -14 -09 as shown in Appendix 4 (4), within the existing permit area. Holes will be rotary- drilled, nominally 5 to 6 inches in diameter, to predetermined core points. The total depth of each borehole is anticipated to be about 320 feet. This predetermined core zone will be cored by PQ wireline methods. Drilling will be with air, air with water injection or water. Cuttings pits will be necessary at all locations drilled by conventional methods (see drawing at Appendix 4(4). Cuttings pits are excavated by a back -hoe and are approximately 6 feet wide by approximately 10 feet long. The pits are unlined and construction is the same for all drilling methods used. Locations of proposed holes and existing access roads are shown on the attached topography and drill hole locations map. All 9 boreholes will utilize the already disturbed area of the existing roadway minimizing the foot print. A small cutting pit will be constructed to capture the cuttings for replacement into the completed borehole prior to plugging the hole. Drill holes will be sealed by filling with cement to an elevation above the coal seam encounter, then replacing cuttings or other suitable media in the hole and placing a suitable plug 10 feet below the ground surface for support of a cement plug to within 3 feet of the ground surface. The plug will be covered with like material as in road base or topsoil depending which is present. Tracks will be raked or brushed to remove obvious signs of activity. GCC Energy, LLC King II Mine Section 2.04.6 Page 6 June 26, 2014 moved 03•Jul•2014