2016-06-27_GENERAL DOCUMENTS - M1977493

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near a haul road for the open pit, it is not within the ore body nor is it within a targeted exploration area. The CAVR also is isolated from the historical underground workings. The CAVR is a former underground mine ventilation shaft more than 660 feet deep that was converted for use as an asbestos disposal site. As described in the CAVR closure documentation,the building above the shaft was decontaminated and demolished,and the shaft was sealed with a steel-reinforced,concrete cap capable of supporting 100 feet of overburden material. The cap also has been identified as an asbestos disposal site with a brass monument embedded in it(see attached photographs). The CAVR is located on a steep hill at an elevation of 11,583 feet,just south of the Climax open pit and north of the reclaimed Storke Yard area. It is approximately three quarters of a mile from the nearest property boundary(see attached aerial photograph). The Storke Yard area is east of the hairpin turn on Highway 91 and is directly below and south of the CAVR(see attached aerial photograph). The Storke Yard was once the center of underground mining operations in the 1970s,with underground entrances at the 5-Shaft headframe and Storke Portal. As reclamation activities were completed in this area in the mid-1990s,buildings were demolished and the area was regraded and seeded. The former underground workings were sealed off from the surface to limit access and the former 5-Shaft headframe that was formerly used to transport men and equipment to the underground mine now operates as a pumping station to convey impacted groundwater from the underground workings into Climax's water management/treatment system. Climax also constructed the Storke Waste Water Pump Station adjacent to 5-Shaft to collect and pump shallow groundwater from the Storke Yard area for treatment. In Technical Revision 24(TR-24)to the Climax Reclamation Permit issued by DRMS,Climax has an established Environmental Protection Plan(EPP)which describes potential contaminant sources in the Storke Yard area, including impacted water from the flooded underground workings,run-off and seepage from the Storke Yard,and run-off from road cuts and overburden above the Storke Yard(which includes the CAVR area). The governing controls(Environmental Protection Facilities or EPFs)in the area include the 5-Shaft pump station, Storke Waste Water Pump Station,and the upgradient run-off collection system. Both the 5-Shaft and Storke Waste Water Pump Station EPFs are monitored several times daily by Climax to maintain proper operation,and they will continue to be monitored after mining ceases at Climax. The CAVR is within the Affected Land boundary as defined under the Climax Reclamation Permit issued by DRMS and within the Industrial Mining Zoning District of Lake County. Therefore, site access has been and will continue to be tightly controlled. Lastly,due to the historical and complex nature of the site,Climax will continue to be maintained after mining operations cease due to the need for long-term water management necessary to meet discharge permit requirements. This need to maintain and control the area over the long term ensures that site access will remain restricted in the post-mining future. In summary,the key physical and land use control factors for the CAVR at the Climax Mine are as follows: • Remote location of the CAVR between an open pit(which will remain post-mining)and the reclaimed former underground mining facilities(Storke Yard area). • General inaccessibility of the CAVR and the depth and inaccessibility of asbestos disposed in the CAVR. • Isolation of the CAVR from historical underground workings. • A maintenance-free,reinforced concrete cap capable of withstanding 100 feet of overburden (approximately 3.8 million pounds)placed on top. 3