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1 <br />2.04.6(2)(a) <br />' (i) Pdature, depth and thickness of coal seams. <br />The C seam varies in thickness from less than 1 foot south <br />' of the lease boundary to a maximum of approximately 8 feet <br />in thickness in Section 16. Based on limited exploration <br />' data, it would appear that the C seam reserves which can <br />be economically recovered from the lease area are confined <br />' to the area north of a line, east-west, through the center <br />of Section 21. A C Seam Isopach Map is enclosed as D1ap <br />2.04.6(2)(a)(i)-1. <br />The quality of C seam coal, as mined, appears to be of high <br />t uniformity. A typical analysis of coal produced is as follows: <br />' ~ Mositure 6.12 <br />$ Ash 6.55 <br />' BTU 12639 <br />~ Sulfur 0.57 <br />' The C seam roof consists of 5 to 12 feet of shale, overlain <br />by massive sandstone. The mine roof is subject to the <br />' occurrence of fractures, ancient channel features and kettles <br />as is normal with this region. <br />t <br /> In gener al, the roof material is reasonably competent but is <br />' subject to deterioration when exposed to the cycles of <br /> moisture change attendant with mine ventilation and natural <br /> climatic conditions. For this reason, 6 to 12 inches of <br />' top coal is left to prevent th e shale exposure. <br />' The floor of the C seam is characterized by 5 to 12 feet of <br />competent shales underlain by a massive sandstone. The floor <br />' 41 <br />