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• significant faults or strata displacements. The coal is strong and pillars <br />are structurally competent showing a lack of squeezing (crushing) or rib <br />spalling. The mine floor does not buckle due to stress from the <br />overburden and because the water table is lower than the seams, pore <br />water pressure is non-existent. The immediate mine roof consists of <br />thinly laminated shales and sandstones. These beds rise up to the base <br />of the Cliff House sandstone an average of twenty feet above the coal <br />seam. The thick Cliff House sandstone provides a great deal of ground <br />stability and generally prevents subsidence from reaching the surface <br />after pillars are extracted during second mining. <br />STRATIGRAPHIC CROSS-SECTION <br />Regional and project area cross sections are shown on Map King II-004 <br />and King II-008, and contained in the NEDO Project Geologic Report <br />excerpts (Appendix 4). <br /> <br /> <br />National King Coal, LLC King II Mine <br />Section 2.04.6 <br />Page 6 October, 2005 <br />