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Reclamation Feasibility Report - Virginia Canyon <br />• <br />Historic Structures <br />There are no historic structures or artifacts at these sites. <br />Water Quality Impacts <br />The chemical and physical characteristics of the waste rock from both mines are very similar. <br />Compared to the other mine sites sampled, metal concentrations are near the median levels. The <br />waste rock piles are directly in the stream channel. The Early Bird waste pile has been mostly <br />eroded away by broadside flow from Boomerang Gulch. Erosion of the waste below the confluence <br />also occurs during high flows. There is some visual evidence to suggest that leaching of the waste <br />rock occurs. Results from the 2:1 leachate analysis are given below. <br />Site #34 <br />PH <br />S.U. Total Acidity <br />m l As <br />b Cd <br />ppb Cu <br />b Fe <br />b Mn <br />b Pb <br />b Zn <br />b <br />3.16 184 BDL _ <br />140 BDL 2300 BDL 15000 10000 <br /> <br /> <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 />3.01 178 BDL 42 160 740 BDL 11000 6300 <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. If the pile is left in place, a deflector should be placed on the road culvert to direct <br />flow downstream rather than into the pile. <br />Remington and Mix Mines (Sites #36 and #86) <br />Location <br />These waste piles are located in the streambed of Virginia Canon at the three-way intersection <br />approximately 1.5 miles above Clear Creek (Figures 3 and 28). The Remington mine waste pile was <br />sampled as site # 36. Site #36 is located at LAT. N390 45'26.7", LONG. W1050 31'42.3". The <br />estimated volume of mine waste is 200 cubic yards. The Mix mine waste pile was sampled as site # <br />86. Site #86 is located at LAT. N39° 45' 27.5", LONG. W1050 31'46.0". The estimated volume of <br />mine waste is 200 cubic yards. <br />Historic Structures <br />There are no historic structures or artifacts at either site. <br />Water Quality Impacts <br />Remnants of the original waste rock piles are all that remain at the two sites. The Remington waste <br />rock is located on the east side of the stream. The Mix mine waste is located upstream from the <br />Remington on the west side of the stream. Both piles are in contact with the stream channel. The <br />piles are actively eroding in this area because the stream channel becomes significantly narrower. <br />In general, both waste rock piles have higher than average metal concentrations. Results from the <br />2:1 leachate analysis are given below: <br />QRQ :911A <br />• <br /> Cd C Fe Mn Pb Zn <br />PH Total Acidity As u <br />s.u. m /I b b b b b b b <br />4.59 112 BDL 300 260 190 BDL 39000 37000 <br />53