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l4AR-1T-96 15:10 Fram:CC&V GOLD ~ III IIIIIIIIIIIII III 17196893254 • T-31` P 02 VWo6-64T sss Cripple Creek & Vk:tor Gold Mlning Company C ~ A Jant VaMUre • Pikes Peaa MininO Company ManaOer ~~ Operations Ofrw Englawoad Orfice P.O. eox 191, 2733 Stale Mlgnwey 67 i P.O. Box 5079. 5251 DTC Parkway, Suite 700 Vaor, CO 90660 Englewootl, CO 80155 November 6, (17~~6ea9-z977 • FAX (719) e89-325a (303) 889.0700 • FAX (303) 989-0707 • SENT BY FACSIMILE & CERTIFIED RETURN RECEIPT REQUESTED P 289 926 294 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 Reference: Dear Mr. Keffelew: In your telephone message of 23 October 1996, you reminded the Cripple Creek & Victor Gold Mining Company ("CC&V") of the need to close out two items that were addressed in the permit application for Amendment Number 6 to the referenced pet7ttit, namely the results of Mine highwall mapping (in relationship to highwall stability) and an "additional shear box test" to assess the internal friction angle of crushed Cresson ore. We will address both of those items here. 1. Mice Hiahwall Stability Pre-~~Ilning Evaluation As part of the original design of the Cresson Mine, a study of the rock mass strength and the highwall slope design was performed and submitted to the Office of Mined Land Reclamation (Call and Nicholas, 1994; see Enclosure 19 of Volume VIII of CC&V's Permit Amendment Application). The results of this study have been used in a con[inuing re-assessment of the slopes of the mine highwalls, and have been augmen[ed with information obtained as the mine has been developed. Results of the original study are referenced, as appropriate, below. Mine Slope Evaluation During Mining With respec[ [o mine highwall stability, CC&V has examined, in varying degrees of detail. essentially all rock faces exposed as the Cresson Mine {"Mine") advances. This examination has included the following aspects of mint highwall slope stability: 1. The geology of Mine highwall materials;