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back to the pits in accordance with the disposal criteria described in Section <br />4.3 and covered with at least four feet of nun-toxic material. <br />Acid or toxic forming materials will not be generated by stripping operations at <br />the Trapper Mine. The chemical composition and geological structure of the over- <br />burden and interburden of this area indicate there are only minor areas of <br />unsuitable materials present (see Section 2.7). <br />Other wastes that are generated in and around the mine facilities area will be <br />handled and treated as referenced 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 <br />seams, and the geological structures and composition of the interburden and over- <br />burden, there are several provisions of regulation Chat are nut applicable as <br />~., listed and explained below: <br />• <br />Terracing <br />Due to the degree of slopes, depth of coal and spoil conditions on the pro- <br />perty, terracing will not be used. AC this time, there have been no condi- <br />tions encountered that require terracing For stabilization. <br />Slopes Greater Than 20° <br />With the exception of small localized areas that occur as the side slopes of <br />natural gullies, there are nu slopes greater thsn 20° on the permit acea. <br />The areas that may exceed 20° are very minor and will in fact be eliminated <br />during mining operations either by [he drag line, dozers, or similar <br />equipment. <br />Thick or Thin Overburden <br />As demonstrated by the following calculations, there is neither thick nor <br />thin overburden at the Trapper Mine. The ratio of final thickness to <br />^O <br />3-48 <br />REVISED FEB 1 x'87 <br />