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Name of Addressee <br />Page 2 <br />Date <br />4. Map 2.05.3(3)-1-2 Post Mine Surface Water Hydrology shows the straw waddles and the small area <br />exemption on the Morgan property. Please remove these items from the map as they will not be post <br />mining structures. <br />5. Map 2.05.3(3)-1-2 Post Mine Surface Water Hydrology shows ponds 9, 12, 13, 15, 16 and 18 and their <br />associated ditches. These items will not be post mining structures and should be removed from the map. <br />Section 2.05.4(2)(c) — Backfill and Grading <br />I . On page -1 in the Final Graded Slopes section, the third sentence states "minor areas on the north limit <br />of the amendment area have slopes greater than 3H: IV." Please clarify which areas this sentence is <br />referring to. <br />2. On page -1, it states that terraces are not proposed as part of the final reclamation. Please add a discussion <br />in this section about the four rock structures built into the former BB Detour Road on the Benson East <br />property. If there is a discussion about these structures in another part of the permit, please make a <br />reference to that section. Also, please include these structures 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 ponds are <br />not permanent structures and should not be included on this map. Please remove them. <br />Attachment 2.05.3(3)-1 <br />Approved Attachment 2.05.3(3)-1 provides collection/diversion ditch and culvert design parameters for <br />the New Horizon Mine. Based on a review by the Division, a revised Attachment 2.05.3(3)-1 was not <br />included which would contain the addition of the proposed collection ditch below the Tailwater ditch. In <br />addition, there is no discussion of the existing Tailwater Ditch in Attachment 2.05.3(3)-l. Please revise <br />Attachment 2.05.3(3)-1 to include all proposed ditches and culverts throughout the mine site or provide <br />revised text to discuss the omission of the designs in Attachment 2.05.3(3)-1 and inclusion in another <br />portion of the PAP. <br />If you have any questions or need additional information, please contact me at (303) 866-3567 ext 8142. <br />Sincerely, <br />A <br />��aA-- <br />Brock Bowles <br />Environmental Protection Specialist <br />brock.bowles@state.co.us <br />