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NEWMONT <br /> GOLDCORR <br /> 5 VALLEY LEACH FACILITIES <br /> The following sections describe the operating parameters for the valley leach facilities (VLFs). <br /> 5.1 VLF1 <br /> There will be no changes to VLF1 as part of this Amendment 13 except for placement of <br /> mineralized waste material as approved by TR-104. <br /> 5.2 VLF2 <br /> This Amendment 13 incorporates the new VLF2 Phase 3 design, which adds approximately 118 <br /> million tons of stacked ore to VLF2, a second Pregnant Solution Storage Area (PSSA) to the <br /> process and increases life of mine to 2028. At construction completion, the VLF2 Phase 3 area <br /> will have an overall slope ratio of 2.5 horizontal (H): 1 vertical (V) slopes, with inter-bench slopes <br /> approximately 50-feet high and 25-foot benches with a slope ratio of to 2H:1 V. An updated water <br /> balance for VLF2 is provided as an attachment to the Valley Leach Facility 2 Phase 3 Detailed <br /> Design Report provided in Appendix 1. <br /> 5.2.1 VLF2 Stability <br /> Slope stability assessments were performed by NewFields as part of the VLF2 Phase 3 design. <br /> The slope stability analyses and results for the Phase 3 design are presented in the Valley Leach <br /> Facility 2 Phase 3 Detailed Design Report, which is provided as Appendix 1 to this Amendment <br /> 13 permit. In general, the results of the analyses indicate that the proposed Phase 3 design slopes <br /> will remain stable under static and pseudostatic conditions, and they meet DRMS requirements. <br /> 5.2.2 VLF2 Underdrain Pump-back System <br /> Modifications to the VLF2 underdrain and pump-back system were made pursuant to TR-74. <br /> Details about the updated pump-back system may be found in the documentation supporting TR- <br /> 74. <br /> 5.3 VLF Water Balance <br /> A water balance analysis was completed by Ecological Resources Consultants, Inc. to predict <br /> monthly fluctuations in solution within the VLF1 and VLF2 systems to ensure adequate storage <br /> capacity is maintained throughout planned operations. Results of the assessment indicate that <br /> individually the VLFs have sufficient capacity in the PSSAs for all predicted conditions. More detail <br /> about the water balance may be found in Appendix 1 of this Amendment 13 documentation. <br /> 5.4 Process Solution Enhancement System (PSES) <br /> No changes are proposed to the Process Solution Enhancement System facility. <br /> Cripple Creek&Victor Gold Mining Company Exhibit D <br /> Cresson Project Amendment 13 <br /> 21 <br />