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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 /> March 2024 <br /> The expansion will include a composite liner system within the pad lined area and PSSA. <br /> The liner systems are identical to the liner systems previously deployed in VLF1 and VLF2. <br /> o Layers of the composite liner system within the PSSA from bottom up are: SLF, <br /> Secondary 100-mil LLDPE Geomembrane Liner, Low Volume Collection Fill, <br /> Primary 100-mil LLDPE Geomembrane Liner, and Drain Cover Fill (DCF). <br /> o Layers of the composite liner system outside the PSSA footprint from the bottom <br /> up are: SLF, Primary 80-mil LLDPE Geomembrane Liner, and DCF. <br /> The VLF Expansions will be constructed in a minimum of four stages and timing is <br /> expected to vary based on business planning. <br /> The quality of the construction for the VLF Expansions is an important aspect of this project. <br /> Qualified personnel under the supervision of an experienced professional engineer registered in <br /> the State of Colorado will be on site to observe and/or provide testing for all aspects of the <br /> construction, included but not limited to: <br /> '> Vegetation and soil removal, <br /> • Subgrade preparation <br /> • Historical underground mine workings remediation, <br /> • Fill placement, <br /> Leak Detection System installation, <br /> Soil Liner Fill placement, <br /> • Geomembrane installation, <br /> Placement of Low Volume Solution Collection Fill <br /> • Installation of the Low and High-Volume Solution Collection Pipes <br /> • Placement Drain Cover Fill. <br /> It should be noted that any mine placed pit backfill material prior to construction of the VLF <br /> composite liner system is considered to be out of the scope of this project and is not considered <br /> a feature of the overall Environmental Protection Facility as described in the Environmental <br /> Protection Plan (Exhibit U) of the Amendment 14 submission. <br /> 4.2. Staged Construction <br /> The VLF Expansion will be constructed in four Stages:VLF2 Phase 4 Stage A and B, and VLF1 Phase <br /> 6 Stage A and B. The staged construction will allow the mine to begin loading ore within the <br /> expansion area of the VLF prior to the completion of the entire Phase. The limits of the overall <br /> • <br /> Page 9 <br />