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4 • &V Cripple Creek & Vlctor Gold Mlning Company A Joint Venture -Pikes Peak Mining Company, Manager Operations Office P.O. Box 191, 2755 State Highway 67 Vigor, CO 80860 (719) 689-2977 • FAX (719) 689-3254 Englewood Office P.O. Box 5078, 5251 DTC Parkway, Suite 700 Englewood, CO 80155 (303) 889-0700 • FAX (303) 889-0707 July 15, 1996 SENT BY FACSIMILE AND CERTIFIED RETURN RECEIPT REQUESTED Mr. Berhan Keffelew Environmental Protection Specialist Colorado Department of Natural Resources Division of Mines and Geology Office of Mined Land Reclamation 1313 Sherman Street, Room 215 Denver, Colorado 80203 RG~FIVED ,lUl. 19 1996 Division of tviinerdls tS Geology Reference: Cresson Project: Permit M-80-244: Procedures and Materials For 1996 Construction. Drain Cover Fill Thickness. Dear Mr. Keffelew: The Cripple Creek & Victor Gold Mining Company ("CC&V"), as committed to in its letters of May 15 and 17, 1996, is providing, as the Attachment to this letter, the results of permeability measurements made after subjecting Soil Liner Fill to freeze-thaw cycles. Measurements were performed on both the Soil Liner Fill being used for 1996 (Phase II) construction as well as the Ironclad Soil Liner Fill used in 1994-5. In summary, three permeability tests were performed on each of three samples of the two Soil Liner Fills. Averaged data for three samples show minor increases and decreases in permeability, with, at the end of five freeze-thaw cycles, a numeric decrease in the average permeability. Because there is no evidence of a detrimental increase in permeability after the freeze-thaw cycles, CC&V submits that it believes it has met its commitments as described in its letter of May 15th and that it has demonstrated the suitability of two feet of Drain Cover Fill for the 1996 (Phase II) construction. The permeability measurements, averaged for the three individual samples run for each combination of material and freeze-thaw cycles, are summarized in the following tabulation.