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Cross Gold Mine <br />December 2024 D-4 <br /> <br /> <br />from mine operations. They are an Environmental Protection Facility. Ponds 3A, 3B, and 3C receive <br />water from the site and portals and this water is conveyed to Pond 1 where it is treated. After treatment, <br />Pond 1 water is conveyed to Pond 2 and discharged. There are several supporting infrastructure <br />components to the water system. Flow sheds contain valves that control the flow between ponds and <br />discharge. The pond sequence is to be replaced by buried pipe and insulated tanks to improve system <br />performance during the winter. This new system will be an EPF and as such will have a final design <br />revision submitted to CDRMS prior to development. <br />The layout of the water system can be seen on Exhibit C maps and in Exhibit G. Details of this <br />infrastructure are discussed in Exhibit U. <br /> <br />As shown in Exhibit I, soil over undisturbed areas in the permit application areas is composed of mostly <br />of a thin layer of loam underlain by cobbly and stony loam and weathered and unweathered bedrock <br />except for the Cryaquolls, which are silty loams on flat to gentle slopes (0 - 15 percent slopes). Other <br />soil types are present on steeper slopes and transition to cobbly and stony within 3 to 5 inches. There is <br />little soil that can be salvaged at this site. There are no plant growth medium stockpiles on the site. <br />Most of the site is already disturbed and was disturbed by pre-law activity, limiting the available topsoil <br />for use in reclamation. <br />Minimal topsoil stockpile construction is expected as part of activity on site. Its location can be seen on <br />Map C-2. Areas proposed for disturbance have previously been disturbed as part of the site’s historic <br />mining operations. If topsoil of sufficient quantity is found, it will be stockpiled so that rehandling is <br />minimized. If soil is stockpiled, topsoil stockpiles will be field identified or marked. On occasion, topsoil <br />may be added or removed from the topsoil stockpile to salvage or replace topsoil during mining <br />operations. <br />Topsoil will be removed from the site of the proposed leach field and placed adjacent to the leach field. <br />Once the leach field is constructed, the topsoil will be replaced, prepared for seeding, seeded with the <br />approved seed mix, and mulched. Mulching will only occur if the activity may be conducted without <br />resulting in safety concerns on slopes. Some development activities will result in tree removal. Where <br />tree removal is necessary, appropriate efforts will be made to remove only those trees and shrubs <br />necessary to provide for an efficient and safe reclamation. Any trees removed during operations will be <br />made available to the employees for firewood. Because site reclamation is well into the future, shrubs <br />removed during site development will be hauled to an offsite facility for proper disposal. <br />The proposed road (Cross Caribou Access Road) between the Cross Mine and the Caribou Mine is <br />partially on previously disturbed land. The road construction in previously undisturbed areas is fill and <br />any topsoil removed will be reused on road embankment revegetation. <br /> <br />This is an underground mining operation, producing ore from various near vertical mineralized veins <br />and deposit thickness is not applicable. Underground mine development will generate waste rock <br />through the excavation of new drifts and tunnels to reach mineralized veins. The amount of waste rock <br />generated annually is estimated to be 20,000 to 40,000 yards.