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,: <br />u <br /> <br />Golder Associates Inc. <br />44 Union Boulevard, Suite 300 <br />Lakewood, CO USA 80228 <br />Telephone (303) 980-0540 <br />Fax (303) 985-2080 <br />August 29, 2002 <br />Cripple Creek & Victor Gold Mining Company <br />P.O. Box 191 <br />2755 State Highway 67 <br />Victor, Colorado 80860 <br />Attention: Mr. Ron Roberts <br />RE: PHASE IVb LEAK DETECTION FILL <br />Dear Ron: <br />Golder <br />~AssociTtes <br />Our Ref: 003-2203 <br />RECEIVED <br />SEP 2 02002 <br />Division of Minerals artd Geology <br />Golder Associates Inc. (Golder) has prepared this letter to address the recent failing gradation <br />for Leak Detection Fill (LDF) in the Phase IVb Area. The gradation test in question was <br />conducted by Golder on August 22, 2002 for LDF used to backfill the Phase IVb LDT. The <br />results of the gradation tests are attached to this letter. As shown, the LDF gradation is within <br />the Golder specifications for this material, with the exception of the 3/8-inch sieve. The <br />Golder LDF specification at the 3/8-inch sieve is 40 to 70 percent passing. The results from <br />the gradation test show that the percent passing the 3/8-inch sieve is 23 percent. <br />Approximately 200 feet (the length of the LDT beneath the west PSSA end berm) of LDT <br />was constructed with this LDF. <br />The results from the LDF gradation indicate the placed material is coazser than the project <br />specification. An LDF material that is coarser than the specification will not impact the <br />performance of the LDT. Therefore, Golder will accept the LDF placed in the LDT beneath <br />the west PSSA end berm. <br />Golder appreciates the ongoing opporhutity to provide engineering services for the Cresson <br />Project. Please contact the undersigned with any questions. <br />Sincerely, <br />GOLDER ASSOCIATES INC. <br />John F. Lupo, Ph.D., P.E. <br />Sr. Project Manager . <br />JFL/dls <br />cc: Bob Nichols, Golder Associates <br />L~L0~220J~A l0U W J320].0100045; 61o W ao829. doc <br />OFFICES ACROSS ASIA. AUSTRALASIA, EUROPE. NORTH AMERICA, SOUTH AMERICA <br />