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VIII. Coal Mine Waste Banks <br /> No specific approvals are granted to the applicant under this section. <br /> IX. Coal Mine Waste <br /> No specific approvals are granted to the applicant under this section. <br /> X. Backfilling and Grading <br /> Backfilling and grading are discussed under Section 3.5, Vol. III of the permit application. <br /> 1. The applicant is bonded for a maximum of four(4) spoil ridges at any time within each pit <br /> area. Reclamation has historically been, and is proposed for completion, at approximately <br /> the same rate as disturbance of any new ground(4.14.1). <br /> 2. Trapper committed to a minimum safety factor of 1.5 to ensure long term global stability in <br /> both the L and Ash Pits, exceeding the minimum requirements (4.12.2 and 4.27.3) <br /> 3. The Post Mine Topography Map (Map M12) is a permit requirement in permit section 3.5.3. <br /> 4. During PR9, TMI requested a variance for backfilling and grading portions of the L and Ash <br /> Pits to the approximate original contour in accordance with Rule 2.06.5. Based on a stability <br /> analysis provided by TMI with (PR9), they demonstrated that based on unique combinations <br /> of steepness of the pit floor, spoil thickness, spoil saturation, and the presence of a weak <br /> shale/clay layer in the floor of the pit, steep slopes for the final cut of the L Pit and Ash Pit <br /> should be identified as any slope over 16 degrees. Therefore, these areas qualify for a <br /> variance from the requirement to backfill and grade to the approximate original contour <br /> under the steep slope mining provision. The findings required for a variance in accordance <br /> with Rule 2.06.5 and Rule 4.27.4 are discussed below in the Operations on Steep Slopes, <br /> Section XX of this document. <br /> XI. Revegetation <br /> The Division previously approved Trapper's revegetation plan as set forth in permit Section 3.6, Vol. <br /> III of the application. <br /> 1. The applicant uses introduced species in the reclamation seed mix, and submitted <br /> information illustrating the desirability and necessity of introduced species in achieving the <br /> approved post-mining land use illustrating that these species are not poisonous or noxious <br /> (4.15.2). In conjunction with Trapper's years of reclamation experience, Trapper has reduced <br /> the number of introduced species in the seed mixes utilized at the site. DRMS found the seed <br /> mix adjustments acceptable. <br /> 2. Methods to measure species diversity, woody plant density, herbaceous cover and production <br /> are discussed in permit section 4.4.1, Volume IV. Seed mixes and revegetation practices are <br /> designed to meet diversity standards set forth in the permit. The applicant will reestablish <br /> shrubs on Range Sites A and B by including various native shrubs in the seed mixes and by <br /> transplanting mature woody shrub clumps. There is no shrub density standard for Range Site <br /> C. (4.15.7(1)). <br /> XII. Post-mining Land Use <br /> Post-mining land use is discussed under Section 4.2, Vol. IV of the permit application. <br /> 18 <br />