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<br /> <br /> <br /> <br />PR-04, Colowyo Coal Mine C1981-019 50 August 2016 <br /> <br />The temporary overburden stockpile for the Collom area will be located within the drainage of <br />Little Collom Gulch. A geotechnical report, prepared by Shannon & Wilson, dated November 3, <br />2015, has been submitted to verify the stability of the temporary stockpile (Volume 20, Exhibit <br />23, Item 2). The fill will be constructed by end dumping the overburden material in 50 to 100 <br />foot lifts to form an angle-of-repose pile. The final pile will be approximately 775 feet high, <br />cresting at an elevation of approximately 7,700 feet. Upon the completion of mining in the <br />Collom Pit, the material from the temporary overburden pile will be returned to the pit using a <br />truck/shovel operation. <br /> <br />VIII. Coal Mine Waste Banks - Rule 4.10 <br /> <br />Colowyo has no coal processing waste or underground development waste. <br /> <br />IX. Coal Mine Waste - Rule 4.11 <br /> <br />No water is used in the coal processing operation, except for dust suppression, and no coal <br />processing waste is produced. <br /> <br />Non-coal waste is placed in the backfill of pits in a manner consistent with the requirements of <br />Rule 4.11.4. <br /> <br /> <br />X. Slides and Damage - Rule 4.12 <br /> <br />The Permit is found to be in compliance with Rule 4.12. Because of the mining technique used, <br />natural barriers are not necessary. Slides have occurred within the Permit boundary. However, <br />none of these slides have had an adverse effect on public property, the health and safety of the <br />public, or the environment. Slides have been reclaimed as appropriate. This practice will <br />continue in the Collom permit expansion area. <br />