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8. To avoid increasing selenium loading into the river, operations that result in increased oxidization <br />of the Mancos shale bedrock must be prevented. Please commit to conducting dewatering <br />operations such that groundwater continues to flow over the shale bedrock during the mining <br />operation, so the shale is not exposed to air, thereby increasing oxidization. <br />9. Response acceptable. <br />10. Response acceptable. <br />11. Response acceptable. <br />Exhibit D -Reclamation Plan <br />12. Response acceptable. <br />13. Response acceptable. <br />14. Response acceptable. <br />15. Response acceptable. <br />16. Response acceptable. <br />Exhibit F -Other Permits and Licenses <br />17. Response acceptable. <br />Exhibit H -Municipalities <br />18. Response acceptable. <br />Exhibit L -Permanent Man-made structures <br />19. Please address the Carlill fences within 200 feet of the proposed permit area and provide an <br />executed damage waiver agreement or engineering demonstration of stability for the <br />Farnsworth/Dustman pond prior to affecting the area within 200 feet of this pond. <br />Geotechnical Stability Report <br />20. The geotechnical stability report for the final slopes addresses stability of gravel slopes at a 3:1 <br />grade. However, the slopes during mining will be at a maximum 2:1 grade, and the reclaimed <br />slopes will be a 2:1 gravel slope backfilled to a 3:1 slope using a cover of overburden soil <br />material, not gravel. Please either provide damage waiver agreements for all permanent man- <br />made structures on or within 200 feet of the proposed permit boundary, or submit engineering <br />stability demonstrations that show adequate safety factors for the proposed 2:1 gravel slopes <br />during mining, and the proposed final slopes consisting of 2:1 gravel slopes backfilled with <br />overburden to a 3:1 grade. <br />The reclamation cost estimate will'be calculated in the next few days and be forwarded to you when <br />completed. Additionally, there is a partial sentence prior to the table on page 33 that either needs to be <br />completed or removed. <br />