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Reclamation Feasibility Report - Virginia Canyon <br />• Water Quality Impacts <br />The entire length of the waste pile is in the stream channel. In addition, the stream passes through <br />a culvert at this site. The culvert directs stream flow broadside into the waste rock. The original soil <br />layer is exposed in several places along the pile. This indicates that there is probably little leaching <br />of the waste rock. Results from the 2:1 leachate analysis are given below. <br />Site #19 <br />pH <br />s.u. Total Acidity <br />m /I As <br />b Cd <br />b Cu <br />b Fe <br />b Mn <br />b Pb <br />b Zn <br />b <br />2.5 2090 700 28 2300 410000 190 3000 5800 <br />Reclamation Measures <br />The recommended reclamation measure for this site is to remove the waste rock. As an alternative, <br />the waste rock can be armored with riprap, wooden or concrete cribbing, or other commercial <br />abutment product. At a minimum, a deflector should be place on the end of the culvert to direct flow <br />downstream rather than into the pile. If the pile is left, a diversion ditch should be constructed above <br />the pile. <br />Keystone Mine (Site #21) <br />Location <br />The Keystone mine is located in the mainstem of Virginia Canyon approximately 1.5 miles above <br />Clear Creek (Figures 3 and 25). The mine waste pile was sampled as site #21. Site #21 is located <br />at LAT._N39 45' 24.8", LONG. W1050 31'40.9". The estimated volume of mine waste is 600 cubic <br />yards. <br />• <br />• <br />50 <br />Figure 25. Keystone Mine (Site #21)