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POWDERHORN <br />COAL COMPANY <br />POWDERHORN COAL COMPI~TY <br />North Decline - Permanent Channel Relocation <br />Certification <br />P.O. Boz 1430 <br />Pelisatle, Color4tlo 81528 <br />(303)484-7951 <br />Fez (303)484-7181 <br />I, Larry M. Reschke, PE 19691, hereby certify that the Permanent <br />Channel Relocation located at Powderhorn Coal Company's North <br />Decline disturbance area meets or exceeds the design requirements <br />of plans submitted to and approved by the Colorado Division of <br />Minerals and Geology. Design information can be found in <br />Appendix WW, and Exhibits 12C and 21, Volume 7 of our Mining and <br />Reclamation Permit Application No. C-81-041. <br />Relocation of the channel was done in the spring of 1992 as part <br />of the final reclamation of the North Decline site. I was on <br />site at the time of construction and was involve in layout and <br />inspected the channel. I surveyed the final slope for the <br />channel on March 26, 1992. During construction I observed the <br />placement of rip rap to the design specifications of a d50 of 12" <br />for the upper section and 6" for the lower section. A subsequent <br />inspection on November 8, 1995, showed the widths, depths and rip <br />rap as being the proper size. There is a small amount of <br />settling near the center of the channel associated with settling <br />of the former decline. This settling will have no affect on the <br />channel's ability to carry the design flows and will have an <br />additional benefit of acting as a sediment trap until it fills <br />with sediment. <br />RECEIVED <br />DEC 2 2 1995 <br />r <br />,~~'~ ~ ~; <br />,,C//_ <br />199 <br />~~ <br />Division of Minerals & Geology <br />Grand Junction <br />