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Section 780.18 (b) Continued. <br /> <br />Revised 11/20/80 <br />drainage areas for these draws would dictate that tremendously <br />large sedimentation ponds be constructed within each drainage, the <br />cost of which may more than offset the value of any additional coal <br />recovered by mining through them. <br />Page 30 of Exhibit 51, Coal Lease C-22777 Environmental Assessment, <br />stipulates that mining activities and the placement of facilities <br />other than a haul road be avoided within Bush Draw and Williams <br />Draw. Additionally, it mentions leaving a 300 foot wide vegetative <br />buffer zone on either side of the draws. Pursuant to stream buffer <br />zone requirements of OSM, Kerr Coal has left a 100 foot wide buffer <br />zone on either side of both draws as a compromise with BLM, and £or <br />the reasons described above. <br />Engineered mine planning eliminates coal waste. Pit configurations <br />are designed according to highwall stability studies performed at <br />the existing mine to eliminate coal loss due to pit wall failure or <br />sloughing. A Caterpillar 245 backhoe is used to separate partings <br />and clean the coal, thus minimizing waste and maximizing recovery <br />of coal with the best possible quality. Further discussion is <br />found in Section 816.59. <br />Acid-Forming and Toxic-Farming Materials <br />No acid- or toxic-forming materials exist within the overburden, <br />soil or coal seams to be mined. A detailed description of the <br />chemical characteristics of overburden soils under the coal seam is <br />presented at Sections 779.14 and 780.21. <br />All potential acid-forming and toxic-forming materials such as <br />grease, lubricants, paints, flammable liquids, garbage and other <br />combustible materials will be stored in designated areas in ap- <br />proved containers for the type of material to be used. <br />780-87 bb <br />~_- ~. <br />