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Homestake Mining Company May 10,2019 <br /> Regular(112d)Operation Reclamation Permit Application Package <br /> 2.0 MINE DESCRIPTION <br /> 2.1. Mine Location <br /> The Mine is located in the Sawatch Range of Saguache County within the Gunnison National <br /> Forest, in a high alpine environment with elevations ranging from 10,000 to 11,000 feet (ft) above <br /> mean sea level (amsl). The site is five miles East of Sargents, Colorado and 18 miles southwest <br /> of Salida, Colorado (see Exhibit B Map B-01 and Figure 3-1). Access to the site from Sargents is <br /> via the unpaved Marshall Pass Road (County road XX32) and then via USFS Roads 243 and <br /> 243.2A. <br /> For purposes of this amendment, the mining related surface disturbances have been subdivided <br /> into manageable operable units (OUs)that define the physical boundaries or limits between areas <br /> to allow for incremental and progressive reclamation. The proposed OUs used in developing this <br /> amended Reclamation Plan were defined as follows, are represented on Exhibit B Maps B-02, B- <br /> 03A and B-03B: <br /> 1. OU 1 North Pit, which consists of the generally reclaimed North Pit slopes, partially <br /> backfilled and revegetated North Pit, North Pit Ditch, North Pit Lake, tension cracks, <br /> internal access roads, three inclinometers and 81 slope monitoring points. <br /> 2. OU 2 South Pit,which consists of the backfilled and revegetated South Pit, South Pit Ditch, <br /> tension cracks, internal access roads, 24 slope monitoring points. The two water <br /> management systems areas are included as part of OU 5. <br /> 3. OU 3 Indian Rock Dump (IRD), which consists of a reclaimed cross valley fill rock dump <br /> slope, Sericite Clay stockpile, Low Grade ore stockpile, internal access roads, three <br /> inclinometers and three slope monitoring points. <br /> 4. OU 4 Tie Camp Rock Dump (TCRD), which consists of a reclaimed cross-valley fill rock <br /> dump slope, Disposal cell, Low Grade ore stockpile and internal access roads. <br /> 5. OU 5 Water Management Systems (WMS) A, B and C which consists of open surface <br /> water drainages, the reclaimed Radium Treatment Plant (RTP), the former Water <br /> Treatment Plant (consisting of a sand filter plant on the southwest side of the Sediment <br /> Dam), and Sediment Pond. While the reclaimed Pinnacle Adit and workings are physically <br /> located within the South Pit OU limits, it is considered part of the WMS OU due to the <br /> water quality issues. <br /> 6. OU 6 Sandstone Quarry. <br /> 7. OU 7 Limestone Quarry. <br /> 8. OU 8 Shop Building, Fuel Storage and Equipment. <br /> 9. OU 9 Mill Site and Stormwater Pond. <br /> 10. OU 10 Haul and Access Roads,which consists of the access road to the Mine, and internal <br /> haul and access roads. that are not bound within the other OUs. <br /> 2.2. Site History <br /> Uranium was discovered in the area in 1955 and was followed by mineral extraction starting in <br /> 1957 (HMC, 2005). Mineral extraction began with underground mine development. Pinnacle <br /> Exploration Company (Pinnacle) was the initial operator, mining ore from the Pitch Tunnel (1958 <br /> EXHIBIT E-RULE 6.4.5(AMENDED RECLAMATION PLAN) Page 3 <br /> HOMESTAKE MINING COMPANY <br />