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Golder Associates Inc. <br />44 Union Boulevord, Suite 300 <br />Lok©wood. CO USA 80228 <br />Telephone (303) 480-0540 <br />Fax <303) 9&5-2080 <br />June 2, 2003 <br />Cripple Creek & Victor Gold Mining Company <br />P.O. Box 191 <br />2755 State Highway 67 <br />Victor, Colorado 80860 <br />~ L'~l~t.[L~LL~?i <br />Our Ref: 003-2203 <br />bl~~o ~: , <br />JUN 0 5 ;._~;, <br />Attention: Mr. Ron Roberts <br />Division ~f Minerals and Geology <br />RE: PSSA UPPER GEOMEMBRANE -RFI NOS. 99, 102, & 105 <br />Dear Ron: <br />Golder Associates Inc. (Golder) has prepared this letter for the Cripple Creek & Victor Gold Mining <br />Company (CC&V) regarding Request For Information (RFl) Nos. 99, 102, and 105 submitted by Ames <br />Construction. These RFIs were submitted requesting the following: <br />• RFI 99: Substitution of 100-mil singled-sided textured liner for 100-mil double-sided textured on the <br />upper floor and side-slopes of the PSSA sump; <br />• RFI 102: Substitution of 100-mil single-sided textured liner for 100-mil smooth liner; and <br />• RFI 105: Substitution of 100-mil single sided textured for 100-mil double-sided liner on panels 0361 <br />and U363. <br />The requested geomembrane substitutions will be allowed under the following conditions: <br />• Substitution of 100-mil singled-sided textured liner for 100-mil double-sided textured on the upper <br />floor of the PSSA sump will be allowed provided the textured side is placed facing upward. The <br />upward facing textured surface is needed to provide frictional resistance for the Drain Cover Fill and <br />Risers; <br />• Substitution of 100-mil single-sided textured liner for 100-mil smooth liner will be allowed provided <br />the substituted panels are small and not located in areas where high stress may be concentrated. <br />• Substitution of 100-mil singled-sided textured liner for 100-mil double-sided textured at Panels <br />U36] and 0363 will be allowed. These panels are relatively small, and are not located in a critical <br />area. In addition, the mechanical properties of single-sided textured and double-sided textured <br />geomembrane are identical, so there is no impact to liner performance. The locations of panels U361 <br />and 363 will be shown in the Certification Report for the Phase IV PSSA. <br />Golder appreciates the ongoing opportunity to provide engineering services for the Cresson Project. Please <br />contact the undersigned with any questions. <br />Sincerely, <br />GOLDER ASSOCIATES INC. <br />h F. Lupo, Ph.D., P.E. <br />Sr. Project Manager <br />I A00@20301 W~00}2303010009395GCOmcmO5i003.Jx <br />