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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 />Map 2.05.4-1 shows the post -mining topography which is similar to the existing topography. <br />Cross-section locations and typical cross-sections through the mining areas are also shown on <br />this map. These cross sections show original and post -mining ground elevations. <br />Slides and Other Damage: NHN does not anticipate any problems with slides at mine during <br />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, the North Haul Road will cross Meehan Draw as <br />shown on Map 2.05.3(3)-3. The disturbance to this wetland area will be mitigated as described in <br />NHN's Nationwide General Permit No. 21 - Surface Coal Mining Activities (Section 404) from <br />the U.S. Army Corp of Engineers. A copy of the approved Section 404 permit is on file at the <br />New Horizon Mine office and available for review at the Division's request. <br />Section 2.05.4(2)(c) Page 3 April 2016 (PR -01) <br />