2012-10-05_REVISION - M1977342 (12)

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TR -18 to Permit M- 1977 -342 Environmental Protection Plan 2. DESCRIPTION OF SITE AND SITE FIGURES 2.1. Henderson Mine The Henderson Mine is an underground mining operation that extracts molybdenite ore from beneath the base of Red Mountain and transports it via conveyor through a 9.6 mile tunnel and 5 mile overland conveyor to the Henderson Mill for crushing and flotation concentrating. The final product is molybdenum disulfide (MoS concentrate that is transported out of the state for final processing. The Mine is located on the north side of Red Mountain near the confluence of Butler Gulch and the West Fork of Clear Creek (see Section B of the Permit). It is 9 miles west of Empire, Colorado, in Clear Creek County on the eastern slope of the Continental Divide. The 1.5 mile access road to the mine site leaves U.S. Highway 40 at the small village of Berthoud Falls, Colorado. The elevation at the mine site is 10,400 feet above mean sea level (AMSL). Facilities at the mine site include shafts, support facilities, and storage yards. The mine yard and facilities encompass approximately 130 acres. 2.2. Henderson Mill The Mill is located in Grand County, Colorado in the upper Williams Fork River valley approximately 22 miles south of Parshall, Colorado (see Section B of the Permit). The Mill site and all facilities are on the western side of the Continental Divide in the upper Colorado River drainage basin. Facilities include the portal and conveyor line, mill complex, and the tailings storage facility. Physical and environmental descriptions of the Mine and Mill site including location maps are found in the Henderson Mining and Reclamation Permit (M- 1977 -342; Sections 2 and 6) as modified. Section B of the Permit shows the general location of the Henderson Mine and Mill. 2.3. Site Figures (See Appendix I) • Figure 1: Mine Site Plan Showing Water Bodies and Sampling Locations - Illustrates the locations of bodies of water around the Mine that potentially could be affected or impacted by designated chemicals, toxic or acid - forming materials or acid mine drainage as well as sampling locations. • Figure 2: Mill Site Plan Showing Water Bodies and Sampling Locations - Illustrates the locations of all bodies of water around the Mill that potentially could be affected or impacted by designated chemicals, toxic or acid - forming materials or acid mine drainage as well as sampling locations. • Figure 3: Henderson Mine EPF 1.1 — Mine Water System - Illustrates the location of the Henderson Mine Environmental Protection Facilities associated with the Mine Water system. • Figure 4: Henderson Mill EPF 1.1 and 1.2 — East Branch Reservoir System and Mill Process Water Storage Tanks - Illustrates the locations of the Henderson Mill's Climax Molybdenum Company Henderson Operations October, 2012 Page 4 of 40