2025-06-23_REVISION - M1980244 (80)

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• SSR MINING 1 INTRODUCTION This updated mining plan presents the changes to the Cresson Project mining operations under this Amendment 14. The mining plan also provides the following: 1. a description of the affected lands boundary; 2. a description of the areas specifically affected by this Amendment 14, 3. the nature and sequence of mining activities including a generalized schedule and sequence for the proposed operations, and 4. a description of the facilities developed at the mine site. This mine plan was prepared in accordance with the Colorado Department of Reclamation Mining and Safety (DRMS) requirements; specifically, Rule 6.4.4 of the Mineral Rules and Regulations of the Colorado Mined Land Reclamation Board for Hard Rock, Metal, and Designated Mining Operations. 1.1 Overview of Amendment 14 Activities The Cripple Creek & Victor Gold Mining Company (CC&V) is proposing to expand the footprints • of three pits and both Valley Leach Facilities (VLFs) to accommodate additional ore reserves being identified within the mine area. The VLF1 and VLF2 Expansion design is consistent with the previously approved VLF designs that have been constructed, with some minor modifications that allow for the utilization of existing infrastructure. The Valley Leach Facility Expansions Detailed Design Report is provided in Appendix 1, and the characteristics of the proposed expansion are summarized below: • The expansion will push the VLF2 footprint south and east until it is adjacent to VLF1 Phase 4, adding 4.1 million square feet of lined area. The VLF1 footprint will expand to the north and east, adding 4.4 million square feet of lined area. The VLF1 and VLF2 expansions will add a total of 189 million tons of ore capacity to the existing facilities. • With the exception of Joe Dandy Hill, the majority of the expansion footprint sits within previously disturbed land; i.e., the footprint already has been cleared and grubbed of unsuitable materials, topsoil has been removed and stockpiled, and the underground workings have been removed or already remediated. • The expansion includes a fourth phase to the VLF2 Facility, which is proposed to be located within the existing High Grade Mill area, extending between the two existing VLFs. The Mill building and its supporting infrastructure will be decommissioned and removed prior to the VLF expansion activities. The proposed VLF2 expansion will be graded to drain towards the existing VLF with solution intercepted by High-Volume Collection Pipes. • Cripple Creek&Victor Gold Mining Company Exhibit D Cresson Project Amendment 14 1