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• 4.14.3 Covering Coal and Acid-Forming and Toxic-Forming Materials <br />Sunbelt will not have any exposed coal seams remaining at the end of <br />mining and reclamation. Permanent sealing of portals is discussed in <br />Section 4.07. <br />No acid-forming or toxic-forming materials have been encountered during <br />the past and present mining by Sunbelt. <br />4.14.4 Thin Overburden <br />Because the Sunbelt operation is an underground mine, the requirements <br />of this Section are not applicable to the application. <br />4.14.5 Thick Overburden <br /> Because the Sunbelt operation is an underground mine, the requirements <br />• of this Section are not applicable to the application. <br />4.14.6 Regrading or Stabilizing Rills and Gullies <br />The implementation of mulching and soil stabilizing practices outlined <br />under Section 4.15.4 will lessen the possibility that erosion can become <br />a serious problem. Sunbelt plans to utilize mulch as soon as practical <br />after grading, and on steeper slopes, contour furrows will minimize <br />overland flow over any long slopes. <br />If gullies deeper than 9 inches should form, the gullies will be blocked <br />to prevent additional erosion and they will be treated with the above <br />mentioned treatments and given the opportunity of stabilizing themselves <br />through the growth of vegetation. <br /> <br />4.14-2 <br />