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• <br />The amount of Methane encountered in both the coal seam and the roof <br />strata has increased. Additional ventilation quantities and possibly a larger <br />mine fan may be necessary. <br />The C seam is thinner than the B seam. The mining equipment will need <br />to be modified for this lower seam. Some equipment will need to be replaced. <br />This additional cost must be justified against the amount of coal that is <br />available to mine. <br />The most troublesome aspect of mining the C seam is the higher sulfur <br />content of the coal in the C seam. Areas of higher sulfur have been <br />encountered previously in the B seam that made it necessary to abandon <br />mining sections. If all of the other problems are solved, the sulfur contained <br />in the C sewn may still make the product unmarketable. <br />Two things are driving the continued exploration of the C seam, reduced <br />• <br />ash content and fewer spars. The quality improvement in the C seam vs. the B <br />seam offers the promise of reduced washing and the potential to actually <br />produce a profitable product. Also justifying continued exploration in the C <br />seam is the reduced number and competence of the spars. Some spars have <br />been encountered but most have been thinner than those in the B seam and <br />have not extended through the entire coal seam. <br />Because the Cameo C seam quality exceeds the B seam, Powderhorn <br />• <br />Coal Company will continue to explore and develop the C seam. The B seam <br />will be drilled from above to determine if the quality of the coal improves. The <br />mine layout discussed in the following section will allow corridors to access the <br />B seam should the drilling indicate that the quality has improved. <br />PHCC R2P2 <br />Page 4 <br />2.28-99 <br />