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<br />• <br />POWDERHORN COAL COMPANY <br />Midterm Drainage Control Calculations <br />Certification <br />As part of Techinical Revision 12 for Powderhorn's Permit No. C-81-041, a mine water <br />treatment pond is being proposed for the Roadside North Portals operation area. This <br />certification covers the new Pond 12 design. <br />I, Larry M. Reschke, PE 19691, hereby certify that the following pages in Appendix 13-2 <br />dated (New or Rev. 9/19/97) have been prepared by myself or under my direct <br />supervision, and that the information contained in the calculations is true and correct to <br />the best of my knowledge and belief: <br />RSN-47, 48 and 48a <br /> <br />'/9 ~9 ~- <br />• INFO-9 (Rev. 9/19/97) <br />