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Top of Sudduth Coal (Exhibits C-SA and C-SB), Overburden Above <br />• Top of Sudduth Coal (Exhibits C-6A and C-6B), and Sudduth Coal <br />Isopach (Exhibits C-7A and C-7B). <br />All data tabulated in Table 6 were interpreted from electric <br />logs run by Century Geophysical Corporation. Drill hole locations <br />within the proposed permit area were surveyed using a transit and <br />stadia board, with all elevations checked against the topography <br />map for accuracy. The drill depths to coal were subtracted from <br />the surface elevation of each hole to determine the structural <br />elevation of the top of the Sudduth Coal at each drill hole location. <br />These points were then contoured, and the subsequent geometry of the <br />coal seam is illustrated on the structure maps (Exhibits C-SA and <br />C-rJB). As can be seen from these maps, the proposed permit area <br />lies on the nose of the McCallum Anticline (which plunges to the <br />southwest), and extends approximately 1/4 mile north along the <br />western flank. Numerous faults are present both on the eastern <br />flank of the structure (perpendicular to strike) as well as on the <br />• nose (perpedicular to the anticlinal axis). The faults in the <br />Pit 2 area trend approximately N45°W and have displacements of up <br />to ninety feet within the proposed mineable area. Faulting may <br />also occur along the western flank, however, drill hole spacing <br />was not dense enough to indicate any faulting. The dip of the <br />coal varies from a minimum of 4.5° in the vicinity of the nose of <br />the anticline to a maximum of about 25° at the northern edge of <br />Pit 2. <br />The overburden maps (Exhibits C-6A and C-6B) were prepared by <br />intersecting the structure map with the topographic map and sub- <br />sequently contouring the data points. <br />The isopach maps (Exhibits C-7A and C-7B) were prepared by <br />interpreting the thickness of the coal from each electric log and <br />subsequently contouring the points. The suite of electric logy for <br />our coal exploration included natural gamma, gamma gamma density <br />• and resistivity. The character of these electric log cur'/es is <br />-aa- <br />