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C Neal Cvpamar. • , <br />, Pretpent <br />N. Nent Baker <br />Eu(pne R. Breuer <br />GOn10n W. BluChner <br /> <br />PeVY:k G. Dwryer ~~ 1 <br />Robert J. Shreve <br />Dale J. Brek:nen <br />Robert D. Thomee <br />GuY R. NAntlolph <br />October 6, 1980 <br />Mr. James Pendleton <br />Senior Geologist <br />Mined Land Rectammation Board <br />Room 423 <br />1313 Sherman <br />Denver, Colorado 80203 <br />SUBJECT: Roadside Mine <br />Dear Mr. Pendleton: <br />A Professional Corporation <br />I Engineers Architects Planners <br />T60 Horizon Drne <br />Grarq Junclim. Cdoretlo 815QI <br />303 2a3 7569 <br /> <br />OCT - 91980 <br />Mi~ED LAyD RECLANAiiON <br />Colo. Dept. of Natural Resources <br />On October 3, 1980 you called concerning the reject pile at Roadside <br />Mine. We understand you observed some leaching and salt deposits <br />on the surface of the reject pile in a small area of the pile. <br />The computer analysis of the slope stability of materials in the <br />reject pile anticipated the existence of grourid water within the pile. <br />We believe that the observed condition is entirely within the parameters <br />used in the computer slope stability analysis and continue to believe <br />the pit is stable at a slope of 2-1/2 i or flatter. <br />We also understand the subject reject pile will eventually be covered with <br />a non-toxic material. We suggest that this material be a free draining <br />soil mixture. An imperious cover is nbt desirable as it may result in a <br />build-up of moisture at the coal-soil interface which could result in some <br />slump of the cover material. <br />Respectfully, <br />ARIX~ P~F~IONAL C PORATION <br />Gordon W. Bruchner, P.E., L.S. <br />GWB:jb <br />cc: Dale Fenwick <br />