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<br />(i ) Of the four coal seams present in the Bookcliffs coal field, Only the Cameo "B" <br /> seam is presently recognized as being economically minable in the Roadside <br /> permit area. From drillhole data, the Carbonera seam is shown to be present <br /> over the portion of this area, but due to its high variability in thickness and <br /> quality it is not known to be economically minable at present. The Cameo "B" <br /> seam is presently being mined at the Roadside South Portals on the East side <br /> of the Colorado River and the Roadside North Portals on the West side. The <br /> Cameo "B" seam varies in thickness from 4 to 8.5 feet in the Roadside South <br /> permit area. However, the minable seam is usually about 6 feet in thickness. <br /> The Cameo "B" seam varies from 5 to 11 feet in the Roadside North area with <br /> an average thickness of 7.2 feet. The coal has been classified as high volatile <br /> bituminous, characterized by low sulfur and moderately high ash content. The <br /> weighted average as-received proximate analysis derived from 63 analyses <br /> made on the unwashed mine-run Cameo coal as shipped over a period of 10 <br /> consecutive years from 1951 through 1960 as published by the U. S. Bureau of <br />• Mines Research Investigations, "Analysis of Tipple and Delivered Samples of <br /> Coal" is as follows: <br /> Cameo Seam <br /> Moisture 7.92% <br /> Volatile Matter 35.56% <br /> Fixed Carbon 46.94% <br /> Ash 9.58% <br /> Sulfur 0.64% <br /> BTU per pound 11,772 <br />The Cameo "C" or Rider seam exhibits little continuity but in selected areas is <br />of minable thickness. The separation between the Cameo "B" and "C" seams <br />varies from 4 to 25 feet in the Roadside South permit area and 40 to 100 feet <br />in the Roadside North area. <br />6-2 (New 3/1 /96) <br />• <br />