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• 7.0 PRECIOUS METALS RECOVERY FACILITY <br />The present Precious Metals Recovery Facility is located on the south side of the VLF <br />and designated as the Adsorption, Desorption, Recovery Facility or ADR. The existing <br />facility has five carbon trains for recovery of gold and is designed to handle flows up to <br />approximately 14,500 gpm. No major changes are anticipated to the existing ADR <br />facility for the MLE Project, however the solution enrichment circuit will be upgraded to <br />allow for the option of routing pregnant solutions from the Phase I through IV VLF <br />directly to the Phase 5 VLF to further enrich gold concentrations in the solutions prior to <br />being sent to the ADR carbon trains. A flow chart of the upgraded enrichment circuit is <br />shown on Figure 7-1 and discussed below. Figure 7-2 shows the pumping and piping <br />layout for the Phase 5 extension area. <br />The current VLF pumping system is approved to handle a maximum flow rate of <br />approximately 19,000 gpm, however, an average flow rate of 14,750 gpm throughout the <br />existing VLF is anticipated. The flows to the VLF are distributed from the barren tanks <br />using four 800 horsepower pumps to deliver solutions to the Phases I, II, III and IV VLF <br />areas. Solutions are distributed roughly equally, at approximately 4,916 gpm for Phase I, <br />• Phases II and III, and Phase IV. Adjustments to these distributions are made continuously <br />based upon the water balance predictions of return flows anticipated at each PSSA. The <br />solutions percolate through the ore to the PSSAs. Pregnant solutions are currently <br />pumped from the PSSAs to the pregnant solution distribution tank. Phase I has three 250 <br />horsepower pumps to send solution at a rate of approximately 4,667 gpm from the PSSA <br />to the pregnant solution distribution tank. There is a complete pump assembly stored in <br />the Mine site warehouse as back-up. Phases II and IV use two 350 and two 250 <br />horsepower pumps, respectively, to deliver solution at a rate of approximately 4,667 gpm <br />from the PSSAs to the pregnant solution distribution tank. The Phases II and IV PSSAs <br />have an installed spare pump on-line. <br />0, <br />Cripple Creek & Victor Gold Mining Company <br />Cresson Project Mine Life Extension <br />7-1