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Corey Heaps <br />CAM Colorado LLC <br />June 21, 2011 Page 31 <br />CAM Response: See revised pages 2.05 -3. <br />Division Response: Response accepted. <br />45. Page 2.05 -4 — please delete "Underground Mining" from the title of (2) Operation <br />description. <br />CAM Response: See revised pages 2.05 -4. <br />Division Response: Response accepted. <br />Rule 2.05.3(3) Mine Facilities <br />46. Section 2.05.3(3)(a) and (c) discuss the proposed mine facilities. For each facility listed, <br />please identify the map or maps on which the facility is depicted. <br />CAM Response. Please see pages 2.05 -5 and 2.05 -8. <br />Division Response: Response accepted. <br />47. Under Rule 2.05.3(3)(c) and referring to Map 16, "Loadout Facilities ", please explain why <br />CAM has elected to make the entire railroad loop drainage report to sediment ponds. It <br />appears to the Division that the portion of the railroad loop not adjacent to the loadout <br />facilities disturbance could be considered as a haul road not in the disturbed area as defined <br />in Rule 4.05.2(4) and, therefore, falls under Rule 4.03.1(4)(iv), similar to the situation with <br />the railroad spur. If changes are made to the sediment control system, please revise the <br />discussions concerning the sediment control system found throughout the permit <br />application. <br />CAM Response: Sections 2.05.3(4), 2.05.6(2) and 2.05.6(3) have been revised. <br />Division Response: In the April 11, 2011 submittal, CAM revised the sediment control <br />system for the railroad loop. However, because the newly proposed construction material <br />borrow area, adjacent topsoil stockpile and the unsuitable subgrade storage area will be <br />located adjacent to the rail loop, that portion of the rail loop would now be considered a <br />haul road within the disturbed area and, as required under Rule 4.03.1(4)(a)(iii) and Rule <br />4.05.2, be required to pass the disturbed area runoff through a sedimentation pond or other <br />treatment facility. <br />Since these three areas appear to be too large in aerial extent to qualify as small area <br />exemptions, it would appear that designed drainage ditches and a new or enlarged pond <br />would be necessary. Please provide a revised sediment control plan for the southern <br />section of the railroad loop. <br />