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(a)(iv) The proposed floor elevation of the mine entries at the portal is 6878 feet. <br />Map 10, Upper Perched Water Zone - Mesa Verde Formation, shows the <br />elevation of the ground water in the vicinity of the portal to be above the <br />proposed portal elevation. Therefore, gravity discharge of water from the <br />portals is possible. See section 2.05.4(2)(8) for portal sealing options. <br />The quality of water that may discharge by gravity from the mine would be a <br />combination of the quality of water being encountered in the B -Seam during <br />mid 2008, the water quality in the B -1 Sump and the D -Seam. A one time <br />measurement of the mine inflow taken on June 2, 2008 from the B -8 panel <br />headgate had the following quality: <br />B -Seam Inflow From B -8 Panel Headgate June 2, 2008 <br />pH (s.u) <br />8.1 <br />Total Manganese (mg /1) <br />0.013 <br />Conductivity (umhos /cm) <br />5,000 <br />Dissolved Manganese (mg /1) <br />0.012 <br />Total Dissolved Solids (mg /1) <br />3,305 <br />Total Iron (mg /1) <br />0.060 <br />Total Suspended Solids (mg /1) <br />17 <br />Dissolved Iron (mg /1) <br />0.030 <br />PR -14 2.05-110 06/14 <br />