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• <br /> EXHIBIT D - Mining Plan and Description <br /> The Climax Mine and mill and ancillary facilities are located at <br /> and near the summit of Fremont Pass (elevation 11 , 318 ' msl ) <br /> where Colorado State Highway 91 crosses the Continental Divide. <br /> As stated in the introduction, the mine and all affected acreage <br /> lie completely within the 12, 000 acres owned by Climax Molyb- <br /> denum Company. The reviewer is referred to Appendix A (Exhibit <br /> B ) for the Climax site map, Appendix B (Exhibit C ) and Appendix <br /> D for the affected areas and affected area designations. <br /> The existing permit (as amended in 1980 ) is premised on contin- <br /> uous operations through approximately 2020 from both the open <br /> pit and the underground mine at a combined average production <br /> rate approaching 50, 000 tons per day. Crushing, milling, and <br /> processing for recovery of molybdenite and by-products such as <br /> tin , tungsten, and pyrite concentrates are described as being <br /> conventional systems. Tailing (primarily silica) is transported <br /> in water slurry via tailing pipelines to the three deposition <br /> areas (Robinson pond, Tenmile pond, and Mayflower pond ) north of <br /> the mine in the upper Tenmile Creek valley . The industrial <br /> . slurry water is decanted from the settled tailing sands and <br /> recycled to the mill via the industrial water circuit. Rock <br /> overburden (very low-grade material from the open pit ) is <br /> deposited on the McNulty dump or the low-grade ore stockpile <br /> ( "E" dump ) near the mill site. <br /> This amendment changes only the timing of mining, the rate of <br /> production, the area of production, and to a minor extent, the <br /> areas of rock overburden deposition. The manner in which ore is <br /> crushed, milled, and processed is unchanged. Likewise, the ways <br /> and means of tailing disposal also are unchanged. All three <br /> tailing ponds are considered active and may be utilized for <br /> tailing deposition or water treatment until Climax operations <br /> terminate. <br /> Mining Plan <br /> The Climax Mine will be operated as a "swing producer" as <br /> defined in the Introduction until such time as operations are <br /> terminated. As the international market for molybdenum dic- <br /> tates , the mine may operate continuously at full or partial <br /> capacity for unknown lengths of time or it may lie in a main- <br /> tained "ready" state for unknown periods. Likewise, the opera- <br /> tion may operate at some degree between these two extremes. As <br /> an active swing producer, the mine and its facilities will be <br /> continuously managed and maintained for operation. <br /> D-1 <br />