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Backfilling and Grading <br />Backfilling and Grading Methods <br />Mining and backfilling operations at New Horizon Mine will be performed concurrently. <br />Scrapers and/or shovel loaded trucks will remove the overburden and parting materials, then haul <br />the material to a previously mined area to be backfilled. <br />Along the cropline in the New Horizon 2 area, some box cut overburden material will initially be <br />temporarily stockpiled outside of the area mined (see Map 2.05.3-1). This box cut material has <br />been stockpiled in a borrow pit near the southeast corner of the permit area and is available for <br />backfilling at the end of mining or at any other time to backfill the mining pit. All vegetative and <br />organic material and topsoil will be removed from the area where overburden material is to be <br />placed. The temporarily stockpiled material will be graded into the mined area and hauled to the <br />final pit area according to the reclamation plan. Map 2.05.4-1 illustrates the reclaimed land <br />contours for the years 1993 to 2007 as well as the projected reclamation contours for years 2007- <br />2016. Since scrapers, trucks and dozers will be used, backfilling operations will occur <br />concurrently with mining operations. No draglines will be used. Backfilled material will be <br />placed to minimize effects on post -mining vegetation and ground water, minimize off-site effects <br />and support the approved post -mining land use. <br />Upon completion of the backfilling, all areas disturbed by mining will be graded to a smoothed <br />landform that approximates the existing, pre -mined landform (see Map 2.05.4-1). This map also <br />has 3 cross sections which show the pre -mining and post -mining land surfaces. <br />General Grading Requirements <br />Final Graded Slopes. Postmining slopes will not be uniform but will approximate the general <br />nature of the pre -mining topography in order to achieve the approved postmining land use. All <br />highwalls will be eliminated and graded to a slope of 3H:1 V or flatter. Some localized areas <br />within the regrade areas may have slopes slightly greater than 3H:1V. See Map 2.05.4-1, <br />Postmining Topography for plan view and cross-sections of the postmining final regrade surface. <br />Terraces. Terracing in the final reclamation is proposed only in the area of the former BB <br />Detour Road. See Map 2.05.4-1, Postmining Topography for the location of these rock terraces. <br />Small Depressions. Small depressions are not proposed at the New Horizon Mine with the <br />exception of the restoration of the depression at Pond 014. The pre -mine landscape shows this <br />depression. After mining, this depression is restored and Pond 014 no longer exists. This pond <br />handles a small drainage area which flows into the depression. <br />Revised January 2016 (TR -70) 2.05.4(2)(c)-1 <br />