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• • III IIIIIIIIIIIIIIII CC Cripple Creek & Victor Gold Mining Company A Joint Venture -Pikes Peak Mining Company, Manager ~" Operations Office Englewood Office P.O. Box 191, 2755 State Highway 67 P.O. Box 5078, 5251 DTC Parkway, Suite 700 Vdor, CO 80860 Englewood, CO 80155 719) 689-2977 • FAX (719) 689-3254 (303) 889-0700 • FAX (303) 889-0707 October 16, 1 96 SENT BY FACSIMILE AND CERTIFIED RETURN RECEIPT REQUESTED Mr. Berhan Keffelew Environmental Protection Specialist Colorado Department of Natural Resources Division of Minerals and Geology Office of Mined Land Reclamation 1313 Sherman Street, Room 215 Denver, Colorado 80203 RECEIVED oc~f 18 1996 L)Ivision ul rruueials ~ Geology Reference: Your Request For Information On Run-of-Mine Ore. Dear Mr. Keffelew: You asked the Cripple Creek & Victor Gold Mining Company ("CC&V"), by telephone, and through your inspection report, received by CC&V on September 16, 1996, to provide information showing that the Run-of-Mine ore being placed on the Cresson Valley Leach Facility will not cause a significant change in CC&V's post-operational removal of cyanide from that Facility. CC&V wishes to provide the following items which explain that the placement of Run-of-Mine ore on the Cresson Valley Leach Facility is a normal procedure for many operations and has no adverse impact on any projections that have been made in the course of designing the Project. • A limited amount of material that is encountered in the Cresson Mine does not need to be processed through the crusher because leaching tests show that the material is leached at the same rate, and to the same extent, as is material which is processed through [he cnlsher. This material is that which almost meets the size specifications that CC&V's metallurgists have developed to best extract gold. The fact that it approximates the leaching characteristics of crushed ore without crushing directs that CC&V place it on the Valley Leach Facility as "run-of- mine" ore. If it were to be crushed, it would require a substantially longer time to work its way through the crusher. It is the low specific gravity of the material and its resultant ability to bridge that requires excessive time for crushing. • All ore material encountered in the Cresson Mine was originally scheduled, within the permit application, to be placed in the Valley Leach Facility. At no time was there a criterion developed or specified that would have resulting in placing ore which did not have to go through the crusher in some other location. Therefore there have been no changes in CC&V's plans [o place all Cresson ore-grade material in the Valley Leach Facility.