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<br />Cripple Creek & Victor Gold Mining Company Exhibit D Cresson Project Amendment 13 21 <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 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 million tons of stacked ore to VLF2, a second Pregnant Solution Storage Area (PSSA) to the process and increases life of mine to 2028. At construction completion, the VLF2 Phase 3 area will have an overall slope ratio of 2.5 horizontal (H): 1 vertical (V) slopes, with inter-bench slopes approximately 50-feet high and 25-foot benches with a slope ratio of to 2H:1V. An updated water 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. 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 13 permit. In general, the results of the analyses indicate that the proposed Phase 3 design slopes 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. Details about the updated pump-back system may be found in the documentation supporting TR-74. <br />5.3 VLF Water Balance <br />A water balance analysis was completed by Ecological Resources Consultants, Inc. to predict monthly fluctuations in solution within the VLF1 and VLF2 systems to ensure adequate storage capacity is maintained throughout planned operations. Results of the assessment indicate that individually the VLFs have sufficient capacity in the PSSAs for all predicted conditions. More detail 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.