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In accordance with TR106 and Appendix T, the K-Pit Buttress Fill is no longer required. The <br /> Horse Gulch Fill is described in Appendix T and inspected in accordance with 4.09.1(11), and <br /> meets the definitions and regulations associated with valley fill and head of hollow construction. <br /> The Horse Gulch underdrain and runoff diversions were constructed in accordance with Rules 4. <br /> 09.2(2), 4.09.3(1), and 4.09.2(7). The slope stability analysis for the Horse Gulch Fill <br /> demonstrates that the fill is designed to meet rules (4.09.1(7)) and(4.09.2(1)). <br /> 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 <br /> pit area. Reclamation has historically been, and is proposed for completion, at <br /> approximately 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 <br /> stability in both the L and Ash Pits, exceeding the minimum requirements (4.12.2 <br /> and 4.27.3) <br /> 3. The Post Mine Topography Map (Map M12) is a permit requirement in permit <br /> section 3. 5. 3. <br /> 4. During PR9, TMI requested a variance for backfilling and grading portions of the L <br /> and Ash Pits to the approximate original contour in accordance with Rule 2.06.5. <br /> Based on a stability analysis provided by TMI with (PR9), they demonstrated that <br /> based on unique combinations of steepness of the pit floor, spoil thickness, spoil <br /> saturation, and the presence of a weak shale/ clay layer in the floor of the pit, steep <br /> slopes for the final cut of the L Pit and Ash Pit should be identified as any slope over <br /> 16 degrees. Therefore, these areas qualify for a variance from the requirement to <br /> backfill and grade to the approximate original contour under the steep slope mining <br /> provision. The findings required for a variance in accordance with Rule 2.06.5 and <br /> Rule 4.27.4 are discussed below in the Operations on Steep Slopes, Section XX of <br /> this document. <br /> 5. The post- mining topography map (annual reclamation map) is a permit requirement in <br /> permit section 3.5.3. <br /> XI. Revey-etation <br /> The Division previously approved Trapper's revegetation plan as set forth in permit Section 3.6, <br /> Vol. 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 /> 19 <br />