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<br />MLESIopeDesign <br />1. INTRODUCTION <br />Cripple Creek & Victor Gold Mining Company ("CC&V") is proposing to extend the life of the Cresson <br />Project, which extracts and processes gold ore from the Cripple Creek Mining District ("District") by <br />surface mining and valley leach extraction methods. This Mine Life Extension ("MLE") will mine an <br />additiona1360 million tons of rock from the District, of which approximately 110 million tons would be <br />processed as ore in a phased extension of the valley leach system, and approximately 250 million tons of <br />overburden would be used for mine backfill or placed in constructed overburden storage facilities. <br />The proposed mine life extension will involve the following mining activities (Figure 1): <br />1. Extending and deepening the existing Main Cresson Mine; <br />2. Extending and deepening the existing Globe Hill Mine; <br />3. Mining the South Cresson Mine <br />4. Mining the Wildhorse Extension Mine <br />5. Mining the Schist Island Mine. <br />• <br />• <br />This report presents the mine slope designs for the MLE. The designs are based on prior material <br />testing, slope analysis, and mining experience. <br />2. EXPERIENCE <br />Slopes have been designed for the following surface mines in the Cresson Project: <br />• Main Cresson Mine ...................... <br />• East Cresson Mine Altman Mine. <br />• Deep Cresson Mine ...................... <br />• North Cresson Mine Area ............ <br />• Wildhorse Extension Mine .......... <br />• East Cresson Extension ................ <br />• Globe Hill Mine ........................... <br />..... Call and Nicholas, 1994; ABC 1997; Itasca 1999 <br />..... ABC, 1998 <br />..... ABC, 1999 <br />..... ABC, 2000 <br />..... ABC, 2003a <br />..... ABC, 2004 <br />..... ABC, 2007 <br />A total of eight surface mines have been developed in the Cripple Creek Mining District: <br />• Portland Pit ........................................ Texas Gulf Sulfur <br />• Ironclad Mine ..................................... CC&V <br />• Globe Hill Mine ................................. CC&V <br />• Main Cresson Mine ............................ CC&V <br />• Ada Bell Mine .................................... CC&V <br />• East Cresson Altman Mine ................ CC&V <br />• East Cresson Extension ...................... CC&V <br />• Wildhorse Mine ................................. CC&V <br />Report 1385E.20080411 1 <br />