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Reclamation Feasibility Report - Virginia Canyon <br />prevent future erosion if the stream meanders. Diversion ditches should also be constructed to <br />S convey run-on water around the pile. <br />Unknown Mine Site #11 <br />Location <br />This site is located approximately 150 feet northwest of the Lower Clarissa Tunnel waste pile <br />(Figures 3 and 22). The mine waste pile was sampled as site #11. Site #10 is located at LAT. N390 <br />46' 02.7", LONG. W105° 32' 16.7". The estimated volume of mine waste at this site is 3,300 cubic <br />yards. <br /> <br /> <br />Historic Structures <br />There are no historic structures at this site. The Flues of a boiler are immediately above the waste <br />rock pile. <br />Water Quality Impacts <br />The toe of the waste pile is being actively eroded by the stream. There is also some erosion from <br />road drainage that flow over the pile. The waste rock does not exhibit high concentration of heavy <br />metals compared to the other piles sampled. Results from the 2:1 leachate analysis are given <br />below: <br /> <br />pH 0ILC ft I I <br />Total Acidity <br />As <br />Cd <br />Cu <br />Fe <br />Mn <br />Pb <br />Zn <br />S.U. m l b b b b b b b <br />5400 <br />2.72 247 BDL 30 2900 22000 1900 270 <br />• 47