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Ray Lazuk <br />March 19, 2014 <br />Page 3 <br />2.0 SYSTEM CONFIGURATION <br />The existing interceptor system consists of a series of open canals and pipelines that collect <br />unimpacted surface runoff from the drainage basins above the Climax Mine industrial area and <br />convey that water around the site to the natural stream channels near the property's edge. The <br />intent of these systems is to reduce the volume of potentially impacted water and therefore <br />reduce the quantity of water requiring treatment prior to release to the natural stream systems. <br />The interceptor systems evaluated herein include the Chalk Mountain Interceptor, East <br />Interceptor, and West Interceptor. Detailed descriptions of these systems are provided below. <br />Figure 1 provides a general arrangement map showing the primary alignment of these systems <br />and how they are arranged within the Climax Mine site. <br />2.1 Chalk Mountain Interceptor <br />The Chalk Mountain Interceptor extends for approximately 16,000 feet from Fremont Pass along <br />the northeast side of Chalk Mountain to the East Fork of the Upper Eagle River. The canal <br />discharges into the natural stream system downstream of Eagle Park Reservoir or optionally <br />into Eagle Park Reservoir. Diversions into Eagle Park Reservoir are controlled by the Eagle <br />Park Reservoir Company. This system intercepts runoff that would otherwise flow into <br />Robinson Tailing Storage Facility (TSF), Chalk Mountain Reservoir, Tim's Pond, Robinson <br />Lake, and the Robinson Dam seepwater collection system. The reach of the interceptor <br />between the Robinson Dam seepwater collection system and the East Fork of the Upper Eagle <br />River was not considered in this evaluation because that reach is not up- gradient of Climax <br />Mine industrial facilities. Figure 2 provides a general arrangement map of the Chalk Mountain <br />Interceptor system. <br />2.2 East Interceptor <br />The East Interceptor extends for approximately 28,000 feet along the east side of the Tenmile <br />Creek valley. It begins in McNulty Gulch, traverses along the eastern edges of Robinson TSF <br />and Tenmile TSF, and discharges into Clinton Reservoir. From there, the Clinton Canal portion <br />extends for about 7,000 feet from the outlet works and spillway of Clinton Dam and discharges <br />into a reconstructed section of Mayflower Creek. The Mayflower Canal portion then continues <br />another 7,000 feet and discharges into Tenmile Creek near its confluence with Humbug Creek <br />