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Corey Heaps <br />CAM Colorado LLC <br />June 21, 2011 P age 38 <br />57. Please add a more detailed description in Section 2.05.3(4)(a)(ii)(C) on permit text 2.05- <br />18 and in the Probable Hydrologic Consequences Section 2.05.6(3)(b)(iii) starting on <br />permit text page 2.05 -49 for the process of dewatering the sediment ponds, including how <br />Reed Wash will be protected from erosion and siltation from disposal of the pond water. <br />CAM : Please see revised text on page 2.05 -19 and 2.05 -54 & 55. Dewatering will be <br />accomplished by use of a 2" trash pump. The discharge hose will be placed directly in <br />the waters of Reed Wash in order to protect Reed Wash from erosion. Excessive siltation <br />disposal should not occur due to discharge of water from the sediment ponds. As stated <br />in section 2.05.6(3)(b)(iii), sediment ponds will improve the quality of the surface water <br />flowing through and out of the proposed permit area and adjacent area because sediment <br />loads will be reduced. This will reduce the total suspended solids in the surface water <br />regime. <br />Division Response: Response accepted. <br />58. On permit text pages 2.05 -18 and 2.05 -19 in Section 2.05.3(4)(a)(ii)(C), please describe <br />where the excess sediment from the pond cleanings will be disposed. <br />CAM : Pond and ditch cleanings will be hauled back to the McClane Canyon mine and <br />either placed in the sediment drying location, or the approved Coal Mine Waste Disposal <br />area. Please see revised page 2.05 -27. In addition, pages 2.05 -16 through 2.05 -20 have <br />been revised to reflect the revised sediment control plan. The McClane Canyon mine <br />will need to incorporate this activity into their permit. <br />Division Response: Response accepted. <br />5$a. On revised page 2.05 -19 of the April 11, 2011 submittal, there is a statement that the <br />ponds will be cleaned out no later than when the ponds are 75% full of sediment. <br />Please revise this sentence to read that the ponds will be cleaned out when the <br />sediment level reaches no more than 75% of the designed sediment capacity. <br />59. As stated on permit text page 2.05 -20 in Section 2.05.3(4)(d), the Division has to make a <br />finding that runoff from disturbances within 100 feet of Reed Wash will comply with <br />Rule 4.05.18. If sediment ponds 3 and 4 are eliminated and best management practices <br />are employed through a revision of the sediment control system for the rail loop, please <br />revise permit text page 2.05 -20 to show how the requirements of Rule 4.05.18 will be <br />met. If silt fence is used, the Division requests that Sedcad designs for silt fence be <br />provided for those stream buffer zone areas in order to demonstrate compliance with the <br />stream buffer zone rule. The Division will make the findings once the sediment control <br />system designs have become final. <br />CAM Response: Please see revised page 2.05 -20, and Exhibit 9 pages Exh. 9 -35 through <br />50. <br />