2025-06-23_REVISION - M1980244 (80)

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SSR MINING Solution intercepted by the High-Volume Collection Pipes will feed directly into adsorption, desorption, and recovery (ADR) Plant 2 (ADR2). During periods of time of plant maintenance or a power outage, the solution coming from VLF2 Phase 4 will be directed into the VLF2 Phase 1 and Phase 2's Process Solution Storage Area (PSSA) by way of an infiltration gallery. • The expansion includes a fifth PSSA to the VLF1 facility. The Phase 6 PSSA is located within the existing crusher pocket and has an embankment east of the Phase 4 PSSA risers and a small containment embankment west of the Cresson Pit. The crusher and associated facilities will be decommissioned and removed prior to construction. • The expansion will include a composite liner system within the pad lined area and PSSA. The liner systems are identical to the liner systems previously deployed in VLF1 and VLF2. o Layers of the composite liner system within the PSSA from bottom up are: Soil Liner Fill (SLF), Secondary 100-mil linear low-density polyethylene (LLDPE) Geomembrane Liner, Low Volume Collection Fill, Primary 100-mil LLDPE Geomembrane Liner, and Drain Cover Fill (DCF). • o Layers of the composite liner system outside the PSSA footprint from the bottom up are: SLF, Primary 80-mil LLDPE Geomembrane Liner, and DCF. The VLF Expansion will be constructed in four Stages: VLF2 Phase 4 Stage A and B, and VLF1 Phase 6 Stage A and B. The staged construction will allow the mine to begin loading ore within the expansion area of the VLF prior to completion of the entire Phase. Prior to the construction of any stage, Issued for Construction (IFC) Drawings will be developed, and will consider changes in field conditions, mine production, climate impacts, contractor availability etc. It is anticipated that any changes to the design and staging of the VLF Expansion will be minor and will not require additional permitting. Amendment 14 is also proposing expansions to Globe Hill, Elkton, and East Cresson Pits. The projected mine sequencing for the Cresson Project is included in the discussions below, although it is important to note that the rate of mining as well as other timelines presented herein are approximate and depend on anticipated production rates, mining fleet, crusher availability, gold price, gold recovery, and other factors, such as fuel prices and weather conditions.As such, these approximate timelines may change and result in a shorter or a longer overall mine life. Details are provided on pre-mining activities of clearing and grubbing, mining operation development including drilling and blasting, mine area stability designs, underground development work, loading and hauling, crushing and conveying, and overburden handling. The following sections also describe the construction, surface water handling, stability of the Overburden Storage Areas • Cripple Creek&Victor Gold Mining Company Exhibit D Cresson Project Amendment 14 2