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<br /> <br />C~ <br />POWDERHORN COAL COMPANY <br />Midterm Drainage Control Calculations <br />Certification <br />As part of the Midterm review of Powderhom's Permit No. C-81-041, revisions and new <br />drainage design were necessary for several locations. These calculations were prepared using <br />Sedcad 3 and assumptions stated within the calculations. These new pages have a new date <br />of December 16, 1996, to be consistant with other submissions, although ,many of the sheets <br />have a subsequent date. <br />I, Larry M. Reschke, PE 19691, hereby certify that the following pages in Appendix 13-2 <br />dated (New or Rev. 12/16/96} have been prepazed by myself or under my direct supervision, <br />and that the information contained in the calculations is true and correct to the best of my <br />Imowledge and belief: <br />RSN- 34 <br />RSS-6, 7, 14a thm 14c and 20 <br />MISC-14 <br /> <br />-9~ <br />INFO-7 (New 12/16/96) <br />