2012-02-28_REVISION - M1980244 (104)

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The second level of the High Grade Mill platform will be at approximately 9,980 feet amsl. The toe of the crushed ore stockpiles will be at this level and material will be removed from the stockpile at this level to enter the grinding circuit. The lowest level of the High Grade Mill platform will include the buildings, structures, and storage areas. The liner along the outside edges of this level will tie into the SGVLF liner system when Phase 2 of the SGVLF is constructed. 6.3.2 Mill Layout and Buildings The largest structure on the High Grade Mill platform will be the mill building. The building layout is shown on the mill design drawings in Appendix 10, Volume VI. The mill building will house all of the High Grade Mill facilities except for the cyanidation leach circuit and thickener tanks. In addition, the mill building will include offices, a warehouse /shop area, a laboratory, and an electrical substation area. In addition to the mill building, thickeners, and cyanidation leach tanks, the mill facilities will include a lime silo, a concrete silo, outside storage areas, and parking. A new power line will be constructed to provide power to the mill (see Drawing C -3 in Exhibit C). An emergency generator will provide backup power to keep the mill running in the event of power failure to the line power supply system. The mill building and cyanidation leach tanks will be placed within concrete foundations. The foundations will include berming or curbing as part of the design and construction in order to allow secondary containment of potential leaks and spills in those areas. The leach tank secondary containment will hold 75% of the volume of one tank. The concentrate thickener, which contains the most gold, will drain into the mill building in the event of an upset. The other thickeners will be located within a curbed concrete foundation that acts as secondary containment. The thickener secondary containment is designed for clean-up control only and in the extremely unlikely event the thickeners fail, they will overflow within the mill platform lined area. Preliminary mill designs are included as part of Appendix 10, Volume VI. These designs are based on the best information currently available and provide a detailed description of the High Grade Mill facilities for MLE2. It is possible that additional information may be generated that would need to be submitted to the OMLR prior to construction of certain project components. In those instances where the submittal of further information is warranted, CC &V will provide Issued for Construction ( "IFC ") drawings and appropriate supporting documentation (e.g., calculations, narrative explanations) to the OMLR containing design details and changes that are based on site specific conditions Cripple Creek & Victor Gold Mining Company Cresson Project Mine Life Extension 2 6 -10