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Therefore, the 0.8 requirement for thin overburden and the 1.2 requirement for thick overburden <br />are not met. <br />Disposal of Excess Spoil: All excavated non -coal material from the mining areas will be used <br />for backfilling the mined pits and blending mined areas into the existing topography to achieve <br />the approximate original landform. Therefore, no excess spoil material will exist. <br />Post -Mining Topography: Mining operations will be performed with shovel/truck and dozers at <br />NHN Mine. The post -mining topography was estimated based upon a 15 percent swell factor. <br />Experience from 1995 to 2009 at the New Horizon 2 Mine has shown that the initial swell is <br />reduced over time with settling which results in a net change of 8% increase in volume. <br />Map 2.05.4-1 shows the post -mining topography, which is nearly identical to the existing <br />topography. Cross-section locations are also shown on this map. Typical cross sections through <br />the mining areas are shown on Map 2.05.4-2. These cross sections show original and post - <br />mining ground elevations. <br />Slides and Other Damage: WFC does not anticipate any problems with slides at NHN Mine <br />during the term of mining and reclamation activities. <br />Post -Mining Drainage Channels: Three primary drainage channels pass through the NHN <br />Mine area. Glasier Draw, Meehan Draw and Nygren Draw (See Map 2.04.7-1). No mining will <br />occur in these drainage channels. However, perimeter haul roads will cross Meehan Draw as <br />shown on Map 2.05.2-1. The disturbance to this wetland area will be mitigated as described in <br />WFC's Army Corps of Engineers 404 permit. A copy of the approved Section 404 permit is on <br />file at the New Horizon Mine office and available for review at the Division's request. <br />Section 2.05.4(2)(c) Page 3 Sept. 2015 (TR -11) <br />