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Cripple Creek & Victor Gold Mine <br />Valley Leach Facility Expansions <br />Detailed Design for Permitting <br />NewFields Project No. 475.0106.064 <br />September 2025 <br /> <br /> <br /> <br />Page 16 <br />4.6.3. Low Volume Solution Collection System <br />The VLF1 Phase 6 PSSA design includes a system of 4-inch diameter perforated CPe pipes called <br />the Low Volume Solution Collection System, located between the upper and lower layers of the <br />100-mil LLDPE geomembrane within the 3-foot layer of LVSCF material. The LVSCS will direct <br />solution, via gravity, to the sloped riser pipes located below the HVSCS SRS. The riser pipes consist <br />of three (3) 18-inch diameter SDR11 HDPE pipes that will be connected to form a manifold. The <br />bottom 22 feet of the riser pipes will be perforated to allow solution to flow into the manifold, <br />where submersible pumps will be lowered to extract any solution and returned to the PSSA. <br />Details of the LVSCS SRS can be referenced on Drawing A023. <br />4.7. Appurtenant Structures <br />A haul road has been included in the design of the VLF Expansion. The haul road begins at the toe <br />of the VLF2 Phase 1 stack and runs between the existing VLF1 and VLF2 to aid in the initial ore <br />loading of the expansion. Although the road design has not yet been finalized, the layout has <br />been included for information and planning purposes only. In its current iteration, the haul road <br />is approximately 13,422 feet long, with a 100-foot driving width. The road will be constructed <br />using non-potentially acid generating (NPAG) general fill material. The road will have a minimum <br />thickness of 20 feet on top of the liner surface will be maintained. <br />4.8. Reclamation/Closure <br />Once the leaching activities have ceased, the facility will be rinsed and capped as described in the <br />approved reclamation and closure plans in Amendments 10, 11, and 13. Based upon the current <br />ore loading scheme, the ore will be stacked in 100-foot high lifts, graded to have side slopes of <br />2(H):1(V), and 50 foot benches to meet the 2.5(H):1(V) maximum closure slope. At closure, the <br />facility will be capped with topsoil and revegetated. Stormwater will be controlled in perimeter <br />stormwater channels, bench channels, and drain down channels. Additional details of the <br />Reclamation/Closure Plan are addressed in Exhibit E of the application. <br />4.9. Technical Specifications <br />Throughout the development and operations of the two VLF facilities at CC&V, Technical <br />Specifications have been established and modified as necessary to achieve the design intent and <br />acceptable performance. The Technical Specifications included in Appendix D are the same as <br />used in construction of Phase 3 of VLF2 except with the following update: <br /> 01050 Construction Staking, Part 1 General, Section 1.5 Construction Certification <br />Documentation, Part B, Submittals by Contractor Upon Completion of Work, first bullet <br />has been updated to say “Leak detection trench plan view showing the limits of the valley