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OCT-08-BB 02:14Pt1 <br />v~ <br />G <br />McCuuey <br />r-rICK FSc <br />Gllmon..n._ <br />FROMFMcCULLEYFRICNiGILMAN <br />• <br />plovlaing en~~ronmrntol <br />conswting ana <br />englnrenng service <br />3034471836 T-OIB P.02 F-154 <br />~_ <br />4900 P~,on EnsT Grcle <br />S~,ta SOOw <br />Bouiaor. Coloraao 80301 <br />303/447-1825 <br />Foe 447-1830 <br />Memorandum <br />TO: <br />CC. <br />FROM: <br />DATE: <br />SUBJECT: <br />Allen Sorenson /Chris Kamnikar -Colorado Division of Minerals and Geology <br />Maxine Stewart -ITEC <br />Ted Gengler -ITEC <br />Tom Moreno -ITEC <br />Lany Owen -McCulley, Frick 8 Gilman, Inc. <br />October 9, 1998 <br />Cash Mine /Gold Hill Mill <br />Tailings Impoundment Expansion <br />Technical Revision <br />Enclosed for your review is a Technical Revision proposing two modifications to the <br />design for the referenced project. The proposed modifications address the following: <br />1) Retention and consolidation of the remaining exposed tailings in the existing <br />impoundment in order to both enhance the stability of the embankment raise and <br />assure a suitable foundation for the new liner system <br />2) An alternative approach to extension and anchorage of the existing and new liner <br />systems at the interim berm. <br />The scope and details of the proposed modifications are consistent with the <br />discussions that we had in the field. The enclosed Technical Revision includes clarifying <br />discussions and graphic presentations of the proposed design modifications, as well as <br />numerical summaries and graphical presentations of the results of pertinent supporting <br />technical analyses. <br />As you know, ITEC is anxious to proceed with the work as quickly as possible, in <br />order to complete the work prior to the onset of inclemen[ winter weather. Accordingly, <br />your prompt review and approval of the proposed modifications would be appreciated. If <br />you have any questions, please contact us immediately. Thank you for your cooperation <br />in this matter. <br />~~ <br />a? <br />~~ <br />AIO~q~oIQUb, NM • Au,T~n, Th e..~ron. MA • boulOi+~. CO • M11~~O.dO MT • FJrr L~vOCO. Tn • $v]n FIOnCi5G0. Cn 60Ti14. WA • WaIIOCC~. iC -_.- <br />