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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 />an average of 16,000 gpm and a maximum of 19,000 gpm. No major changes are <br />anticipated to the existing ADR facility for the MLE Project, however the solution <br />enrichment circuit will be upgraded to allow for the option of routing pregnant solutions <br />from the Phase I through IV VLF directly to the Phase 5 VLF to further enrich gold <br />concentrations in the solutions prior to being sent to the ADR carbon trains. A flow chart <br />of the upgraded enrichment circuit is shown on Figure 7-1 and discussed below. Figure <br />7-2 shows the pumping and piping layout for the Phase 5 extension area. <br />The current VLF (Phases I, II, III, and IV) pumping system is approved to handle a <br />maximum flow rate of approximately 19,000 gpm, however, an average flow rate of <br />16,000 gpm throughout the existing VLF is anticipated. The flows to the VLF are <br />distributed from the barren tanks using four 800 horsepower pumps to deliver solutions to <br />the Phases 1, II, III and IV VLF areas. Solutions are distributed roughly equally, at <br />approximately 4,916 gpm for Phase 1, Phases 11 and III, and Phase IV. Adjustments to <br />these distributions are made continuously based upon the water balance predictions of <br />return flows anticipated at each PSSA. The solutions percolate through the ore to the <br />PSSAs. Pregnant solutions are currently pumped from the PSSAs to the pregnant <br />solution distribution tank. Phase I has three 250 horsepower pumps to send solution at a <br />rate of approximately 3,333 gpm from the PSSA to the enrichment tank and <br />approximately 2,200 gpm to the pregnant solution distribution tank. There is a complete <br />pump assembly stored in the mine site warehouse as back-up. Phases II and IV use three <br />350 and three 250 horsepower pumps, respectively, to deliver solution at a rate of <br />approximately 3,333 gpm from the PSSAs to the enrichment tank and approximately <br />2,200 gpm to the pregnant solution distribution tank. The Phases I, II, and IV PSSAs, <br />depending on operating conditions, may have one to three pumps running at any given <br />time. <br />TR 58 Revision - March, 2010 Cripple Creek & Victor Gold Mining Company <br />Cresson Project Mine Life Extension <br />7-1