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be submitted in the Annual Reclamation Report. Should a substantial grading problem be detected, <br />• The Division shall be notified and shall be presented with a proposed remedial plan. <br />The probability of slides occurring is relatively low; however, at any time a slide occurs which results <br />from mine-related activities and which may have a potential adverse effect on public property, health, <br />safety, or the environment, SCC will notify the Division of the occurrence of the slide and the remedial <br />measure proposed to be undertaken. <br />Waste materials are not used for till. No excess spoil or waste storage areas are anticipated as a result <br />of mining at Yoast. Mining waste materials consisting of the immediate top and bottom of the coal <br />seam, and carbonaceous shales, when encountered, are buried under a minimum of four feet of <br />noncombustible material Isee Tab 21, Minesoil Reconstructionl. Non-coal wastes such as greases, <br />lubricants, paints, flammable liquids, garbage, lumber, and other manmade combustibles are stored in <br />appropriate containers in the vicinity of the shop bwlding. These non-coal wastes will be disposed of <br />off-site by a private licensed contractor. <br />Post Mining Topography <br />• General. Backfilling and grading of mined spoil will produce a post mining topography similar to the <br />original landform. The design of the post mining landform utilizes existing data. The purpose of the <br />design is to construct a post mining landform which is adequate for defining drainage patterns and for <br />review and analysis by regulatory authorities. <br />The design requires adjusting the original landform elevations for the removed coal seam and the swell <br />of the overburden and nonrecoverable coal material. Data necessary to develop the new elevations <br />and calculate volumes are overburden and coal thickness, bottom of the mined seam, original ground <br />surface elevations, and the limits of the area to be mined. All of these data are available in a <br />computerized drill hole data base and from topographic maps. <br />Volume Calculations (Pre-Mining Topographyl. All of the volumetric calculations used in the <br />development of the post mining topography are shown on Table 20-1, Post Mining Landform Mass <br />Balance, The volumes are broken out into two areas, Area I is the original mining area. Area 2 is the <br />mining area to the south. Please reter to Exhibit 20-2, Post Mining Topography, for the volume <br />locations. The following methods were used in determining those volumes. <br />l J <br />3 Revised 2/99 <br />