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Colorado Division of Reclamation, Mining and Safety <br />March 21, 2016 <br />Page 2 <br />these ditches or provide a revised Attachment 2.05.3(3)-1 providing a justification and noting <br />that these ditches are no longer required. <br />Response: Attachment 2.05.3(3)-1 has been revised to no longer include designs for ditches C10 <br />and D 1 W. Due to the changes being proposed to the postmining topography within the drainage <br />areas of these ditches, they are no longer required. <br />4. Map 2.05.3(3)-1-2 Post Mine Surface Water Hydrology shows the straw wattles and the small <br />area exemption on the Morgan property. Please remove these items from the map as they will not <br />be post mining structures. <br />Response: The straw wattles and the small area exemption on the Morgan property have been <br />removed from Map 2.05.3(3)-1-2. <br />5. Map 2.05.3(3)-1-2 Post Mine Surface Water Hydrology shows ponds 009, 012, 013, 015, 016 and <br />018 and their associated ditches. These items will not be post mining structures and should be <br />removed from the map. <br />Response: Ponds 009, 012, 013, 015, 016, 018 and their associated ditches have been removed <br />from Map 2.05.3(3)-1-2. <br />Section 2.05.4(2)(c) — Backfill and Grading <br />1. On page -1 in the Final Graded Slopes section, the third sentence states "minor areas on the <br />north limit of the amendment area have slopes greater than 3H.•I V. " Please clarify which areas <br />this sentence is referring to. <br />Response: The text in the Final Graded Slopes section has been revised to clarify that all <br />highwalls will be eliminated and graded to a slope of 3H:1 V or flatter and that some localized <br />areas within the regrade area may have slopes slightly greater than 3H:1 V. <br />2. On page -1, it states that terraces are not proposed as part of the final reclamation. Please add a <br />discussion in this section about the four rock structures built into the former BB Detour Road on <br />the Benson East property. If there is a discussion about these structures in another part of the <br />permit, please make a reference to that section. Also, please include these structures on Map <br />2.05.4-1. <br />Response: The text in the Terraces section has been revised to indicate that terracing in the final <br />reclamation is proposed only in the area of the former BB Detour Road. The location of these <br />rock terraces has also been shown on Map 2.05.4-1. <br />3. On Map 2.05.4-1 Post Mining Topography, ponds 9, 12, 13, 15, 16 and 18 are included. These <br />ponds are not permanent structures and should not be included on this map. Please remove them. <br />Response: Ponds 009, 012, 013, 015, 016, 018 and their associated ditches have been removed <br />from Map 2.05.4-1. <br />AN EQUAI OPFORTUNITS-; <:, FIRro-r, VIVF- xCifi?r `ur.l' 0" R <br />A Touchstone Energy* Cooperative <br />