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:,.- _- - ~i ~~ III IIIIIIIIIIIIIIII __ W~esrEe.N 999 ~= FUEIS-UT.lFf a INC. ~~~~~~~~ _ __ A 5u(uv(urry o n~~ F~~ MAR 31986 MINED LANG HECLAMATi4N Colo. Dept. of kat~ral Resources February 26, 1986 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-018-81. Dear Mr. Gillis: On February 18, 1986, 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 require- ments of Rule 4,09 1 (11) of the Colorado Mined Land Reclamation Board. In completing my certification, I have conducted an in- spection of the refuse sub-area 1 and 2-3 piles and construction site. 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 geotechnical investigation for the disposal site revealed no ground water present. Permanent out slopes have not yet begun to be built. Required compaction was achieved in all lifts through September 23, 1985 at which time weather conditions became prohibitive of adequate drying. We are presently placing refuse in sub-area 2-3 and awaiting warmer weather in order to resume proper compaction processes. We have recieved a vibrating compactor which is achieving excellent results. Ueser.+do A4ne P 0 6m 1067 Rangel}', folurado S164fi telephone 303!675 F431 1'elecopier 303/67i~5'-29