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• o "The stability of cuts and fills within the permit area, <br />consisting of rock and/or mine processing wastes, by <br />state of the art analytical methods including computer <br />analysis, hand calculated verification including field <br />and laboratory testing, to determine whether the minimum <br />factor of safety, as outlined in the Rules, is satisfied <br />for each structure for static conditions'. <br />o "General compliance with the Rules in regards to all <br />other civil structures within the permit area and their <br />relative impact on the overall reclamation plan". <br />GTL determined the stability of the refuse pile, with a 2:1 <br />slope and a pile height of 30 feet, using shear strength values <br />of ~ = 23.6, c = 150 psf. The shear strength values were <br />determined from tests on samples compacted at 668 of maximum <br />proctor density. The minimum factor of safety was reported to be <br />1.525 under the above assumed conditions and a phreatic surface 5 <br />feet above the ground surface. <br />• All other items were reported to be in compliance with Rules 2 <br />and 4 of the Regulation of Colorado Mined Land Reclamation Board <br />for Coal Mining. <br />PRESENT DISPOSAL OPERATIONS <br />The coal processing wastes, consisting of coarse and fine refuse <br />material, are hauled to the disposal site via trucks. The coarse <br />material is dumped at or near the location of the final placement <br />while the saturated finer refuse material is placed in a small <br />temporary pond within the limits of the final pile configuration. <br />The fine refuse is allowed to dewater and then is mixed with the <br />coarse material and compacted to approximately 90 percent of <br />standard proctor density. <br />• The present pile configuration showing the approximate limits of <br />2 <br />