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NEWMONT <br />GOLDCORP <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 Svstem (PSES <br />No changes are proposed to the Process Solution Enhancement System facility. <br />Cripple Creek & Victor Gold Mining Company <br />Cresson Project Amendment 13 <br />21 <br />Exhibit D <br />