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mc. <br />n s„dsm;an <br />of <br />Wes(em £ueG~ <br />Associa(ron, Inr. <br />iii iiiii~iiiiiii iii <br />9~ <br />~e~~1=? v Cr~.. <br />S~P~J1°91 <br />September 26, 1991 <br />Mined Land <br />Reclamation Division <br />Ms. Susan Morrison <br />Reclamation Specialist <br />Colorado Mined Land Reclamation Division <br />1313 Sherman Street <br />Denver, CO 80203 <br />Re: Annual Proonal Certification D• ent for D-Portal <br />Sediment Contro Pond (DP-1) on the Des do Mine Property, <br />Bonanza Power Project File No. C-018-81. <br />Dear Mr. Price: <br />On September 26, 1991, I performed an inspection of the Deserado <br />Mine D-Portal Sediment Control Pond (DP-1) N.P.D.E.S. permit #001. <br />I am a professional engineer registered in the State of Colorado <br />and my experience fulfills the requirements of the Colorado Surface <br />Coal Mining Reclamation Act. <br />The purpose of my inspection and certification was to ensure proper <br />construction of the D-Portal Sediment Control Pond and to satisfy <br />the requirements of Rule 4.05.6 (11) (a) of the Colorado Mined Land <br />Reclamation Board. In completing my certification, I have <br />conducted an inspection of the D-Portal Sediment Control Pond and <br />construction site. <br />The dam inspection showed no problems concerning cracking, erosion, <br />redert sctivity, or displacements in the fctlowing area; upstream <br />face, downstream face, and the crest. No seepage was located on <br />any of the dam areas. The outlet conduit was in good shape and no <br />leakage was noted. The emergency spillway showed no signs of <br />deterioration or erosion and the riprap was .in good condition. No <br />effluent quality could be noted at inspection time, since the pond <br />was not discharging at the outlet. <br />The top soil pile for this area has been seeded and shows stable <br />vegetation growth. Removal and stock piling of all organic <br />material and topsoil prior to water impounding has been completed. <br />Deerado Mine <br />P.0. Box lOti7 <br />Rangely, Colorzdo 81648 <br />Telephone 303/675-8431 <br />Telecnpier 3D3/675-5229 <br />