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Cross Gold Mine <br />December 2024 D-5 <br /> <br /> <br />The waste rock landform location can be seen on Map C-2. The Waste Rock Landform is located at the <br />upper or western entrance to the Caribou Mine: the Idaho Tunnel Portal. The Waste Rock Landform will <br />be used for all waste rock generated on site. It has a working stacked capacity of approximately 30,000 <br />cubic yards. Waste rock may be crushed and screened at the waste rock landform. This produces a <br />fine material and a coarse rip-rap sized material that meets most of the mines uses for construction <br />work when needed. Water spray is used for dust control. Waste rock is primarily composed of gneiss <br />and quartz monzonite. Waste rock may be trucked off-site periodically for beneficial use by third parties <br />as a construction aggregate. <br />The waste rock will be made available to Boulder County Road and Bridge Department and the <br />U.S. Forest Service for use on their roads and used on site. The waste rock is inert host rock <br />lacking the metal mineralogy that would lead to acid or heavy metal generation. <br />PAF waste rock is addressed in Exhibit U. <br /> <br />This is an underground mining operation, producing ore from various near vertical mineralized veins. <br />Therefore, deposit thickness is not applicable. <br /> <br />Major operational components of the mining operation are listed below. There are other site <br />components shown on Exhibit C maps that are not operational components of mine. These include the <br />Historic Cabin, Munitions Shed 1 and 2, and the NOAA Shed. <br />• New Roadway between Cross and Caribou Mines <br />• Ventilation Shaft and Escapeway Roadway Accessing Caribou 300 Level <br />• Cross Mine Adit <br />• Caribou Management Office <br />• Idaho Tunnel Portal <br />• Caribou Water Treatment Shed <br />• Caribou 300 Level Portal Flow Shed 1 <br />• Waste Rock Storage Area <br />• Potable Water Pipe <br />• Sanitary Water Pipe <br />• Pond 1, 2, 3A, 3B, 3C <br />• Septic Tank and Leach Field <br />• Caribou Parking Area <br />• Cross Shop and Adit Access <br />• Cross Parking Area <br />• Cross Ore Building <br />• Ore Storage Area <br />• Offices and Dry Room <br />• Fuel and Oil Shed <br />Exhibit C maps depict the major components of the existing mining operation. The sizes of the <br />disturbed areas are shown in Table D-1. Most of the affected areas will be undisturbed by mining