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;~ . <br />12-28-82 Observations of construction methods <br />and density tests. <br />8-18-83 Density tests <br />Pile slopes as measured varied between 28 and 35 percent. The <br />pile slope height varied between 37 and 58 feet in height. <br />SQMMARY <br />Based on the periodic inspections conducted by Rocky Mountain <br />Geotechnical, in-place densities performed on the pile, final <br />slope and height measurements conducted by Dorchester Coal <br />Company, the following conclusions can be made. The Dorchester <br />No. 1 Mine's Coal Processing Waste Disposal Pile (refuse pile) <br />was constructed within the design requirements as set forth in <br />Rocky Mountain Geotechnical's report and satisfies the <br />requirements set forth in the Regulations of the Colorado Mined <br />Land Board foc Coal Mining. Therefore, it is Rocky Mountain <br />Geotechnical's opinion that approval should be given by the CMLRD <br />to allow Dorchester Coal Company to perform final reclamation on <br />the portion of the Coal Processing Waste Disposal Pile now <br />completed. <br />If additional information is required regarding the certification <br />of the Coal Processing Waste Disposal Pile please transmit <br />request to Dorchester Coal Company and every effort will be made <br />to satisfy your request. <br />Respectfully submitted, <br />ROCKY <br />Richard J. "Cy~eenwa6d, P.E. <br />Project Ma ger <br />RJG/msl <br />Enclosure: Plan Location of final density tests taken: <br />8-18-83 <br />