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Peabody <br />Peabody Sage Creek Mining, LLC <br />July 12, 2013 <br />Mr. Jason Musick <br />Colorado Division of Reclamation Mining & Safety (DRMS) <br />1313 Sherman Street, Room 215 <br />Denver CO 80203 <br />Peabody- Sage Creek Mine <br />PO Box 250 <br />36600 Routt County Road 27 <br />Hayden, CO. 81639 <br />15 �p�3 <br />�o- <br />�EC <br />M <br />Re: Peabody Sage Creek Mine (Permit No. C- 2009 -087) Technical Revision (TR07 -13) <br />Sump and Road As- Builts and Drainage Updates <br />Mr. Musick: <br />Peabody Sage Creek Mining, LLC (PSCM) is submitting two copies of the proposed TR07 -13. <br />Included in this TR is the as -built information for the Upper and Lower Sumps as well as for the <br />roads on site. <br />During the spring of 2013, it became apparent that some of the drainage was not adequate on the <br />substation and utility pads. The substation pad was found to need substantial work to ensure <br />proper runoff from the pad. PSCM is proposing a minor move of the access road allowing for <br />the removal of culvert SC -18. The road would be directed closer to the substation pad and the <br />current ditch would run adjacent to the road instead of being routed underneath. PSCM also <br />proposes adding a small perimeter ditch and culvert to direct the flow from the northwestern <br />section of the substation pad to ditch RD -D2. This ditch is still adequately sized as the water <br />flowing from the new ditch would otherwise have been entering RD -D2 by way of ditch FA- <br />D1A. The culvert has been sized using SedCAD, and the report is attached. <br />PSCM also proposes the addition of small perimeter ditches along the north and west edges of <br />the utility pad to better route water off the pad to FA -132. A similar perimeter ditch will also be <br />added on the eastern edge of the pad. This will redirect a minimal amount of water from the <br />slope of the western edge of the substation pad as well as the south eastern portion of the utility <br />pad. The water from this perimeter ditch would flow into the new culvert mentioned earlier and <br />then enter the RD -D2 ditch. <br />Included with this submittal are: <br />• Application for Revision <br />• Public Notice <br />• Insertion Instructions <br />• Text Revision <br />