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~_ ~~N • -III IIIIIIIIIIIIIIII\ • ;~. / -_ ~~_«,~ -_ INC. ' A Sutuidran' - - of Wecfern FueLc _~ A.LVJMhmI. lnc ~hehael I aeicond. NE Ilm; Ilun:r lP'r October 25, 1989 Mr. Tom Gillis Reclamation Specialist Colorado Mined Land Reclamation Division 1313 Sherman Street Denver, Colorado 80203 Re: Professional Certification Document for the Coal Processing Waste Bank on Deserado Mine Property, Bonanza Power Project File No. C-O18-81. Dear Mr. Gillis: On September 29, 1989 I performed an inspection of the Deserado Mine refuse pile sub-areas 1 and 2-3. I am a professional engineer registered in the State of Colorado and my experience fulfills the requirements of Colorado Surface Coal Mining Reclamation Act. The purpose of my inspection and certification was to ensure proper construction of the refuse pile and to satisfy the requirements of Rule 4.09 1 (11) of the Colorado Mined Land Reclamation Board. There are no apparent points of seepage in the pile, and there is no indication of slope failure. The surface drainage facilities were adequately maintained and were working properly. No subdrain system is required by our permit, since geotach~ical investigation for the disposal site revealed no ground water present. Permanent out slopes are being constructed now on the toe of sub-area 1 and are stable. A groundwater monitoring well has been installed between sub-area 1 and sub area 2-3. To date no water has accumulated in the well. We have now, to date, a total of 567,515 tons of refuse placed in sub-area 1, and 713,345 tons placed in sub-area 2-3. Both the topsoil and subsoil piles for those areas have been seeded and are stable. Removal and stock piling of all organic material and topsoil prior to disposal of refuse has been completed. Deserado Afine P.0. Box 1067 ftangel}'. Colorado 51648 Telephone 303/6758431 Telecapier 303/67>~5??9