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Acid or toxic forming materials will not be generated by stripping operations at the Trapper Mine. The <br />chemical composition and geological structure of the overburden and interburden of this area indicate <br />there are only minor areas of unsuitable materials present (see Section 2.7). <br />Other wastes that are generated in and around the mine facilities area will be handled and treated as ref- <br />erenced in Section 4.3 "Waste Disposal." <br />3.5.7 Non -Applicable Situations <br />Because of the topography at the Trapper Mine, the depth and pitch of the coal seams, and the geological <br />structures and composition of the interburden and overburden, there are several provisions of regulation <br />that are not applicable as listed and explained below: <br />Terracing <br />Due to the degree of slopes, depth of coal and spoil conditions on the property, terracing has not <br />historically been used at the Trapper Mine. An exception to this is the final configuration of the <br />Horse Gulch Fill. Terraces (benches) have been constructed at intervals of 100 vertical feet to <br />insure stability. <br />Slopes Greater Than 20° <br />With the exception of small localized areas that occur as the side slopes of natural gullies, there are <br />no slopes greater than 200 on the permit area. The areas that may exceed 200 are very minor and <br />will in fact be eliminated during mining operations either by the dragline, dozers, or similar <br />equipment. <br />Thick or Thin Overburden <br />As demonstrated by the following calculations, there is neither thick nor thin overburden at the <br />Trapper Mine. The ratio of final thickness to <br />_NVALAL JL <br />MAY 21 2013.I���h._._ <br />3-48 <br />