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Disposal of Excess Spoil <br />All excavated non -coal material from the mining areas will be used for backfilling the mined pits <br />and blending mined areas into the existing topography to achieve the approximate original <br />landform. Therefore, no excess spoil material will exist. <br />Postmining Topography <br />Since mining operations will be performed with shovel/truck and dozers instead of a dragline, <br />the post -mining topography was estimated based upon a 15 percent swell factor. Previous <br />experience has shown that the initial swell is reduced over time with settling, which results in a <br />net 8% increase in volume. The need for the slot cut along BB Road and 27.00 Road will cause <br />the overburden behind this area to be slightly raised, but the extra height is still within the limits <br />of approximate original contour. In addition, WFC received a letter, dated 20 September 2002 <br />from San Miguel Power Association, a major NH2 landowner, that the post -mining contouring <br />on their property was acceptable. See Attachment 2.04.(2)(c)-5 for the 20 September 2002 letter. <br />In some areas, in order to return the land to topography that meets the landowners' needs, swell <br />volume was placed elsewhere. This primarily affects the ERMR-Lloyd and ERMR-Benson West <br />properties, which are now slightly higher than in pre -mine. Excess overburden volume from the <br />Morgan property was moved to the Lloyd and Benson areas in order to meet the Morgan's <br />requirements of returning the land to the same surface elevation. <br />Map 2.05.4-1 shows the post -mining topography, which is in accordance with the post mine land <br />use. Cross-sections through the mining areas and their locations are also shown on this map. <br />These cross sections show original and post -mining ground. In the New Horizon Mine area, the <br />mined -out portions of county roads BB Road and 27.00 Road will be restored to their original <br />condition and approximate location as specified by agreement with Montrose County (see <br />Attachment 2.05.3(3)-8). <br />Slides and Other Damage <br />Since the backfill is stable, slides are not anticipated during the term of mining and reclamation <br />activities. <br />Postmining Pond Retention <br />As described in the Mine Facilities Section, Pond 007 will be retained for use by the landowner <br />and the embankment of 5t' Street must remain for ongoing use of the road. See Attachment <br />2.05.3(3)-16 Demonstration for Retention of Pond 007 for details. <br />Page 2.05.4(2)(c)-5 July 2018 (TR -84) <br />