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standard of 0.03 mg/L. R:00140, 00463, 00873 -874. Further, the mine pool <br />contained approximately 1.5 mg/L of molybdenum, about 40 times the state <br />standard. R:00140, 00463. <br />Water seeping int <br />drainage and is of poor quality, with high levels of total dissolved solids, <br />uranium, manganese and copper. R:00145 -146, 00214, 00221, 00225. <br />Division staff member David Bird testified that when Cotter was <br />dewatering the mine pool, there was a cone of depression in the pool. R:00874. <br />Mr. Bird testified that a <br />hydrostatic equilibrium, <br />towards the Mine to tow <br />the upper levels of the Mine is impacted by acid mine <br />ter dewatering ceased, the mine pool attains <br />and the hydraulic gradient starts to reverse itself from <br />A rds Ralston Creek, which causes the mine pool to pose <br />a "serious threat to downgradient water resources" including water <br />supplies. R:00874, 0088 -885, 00890. Mr. Bird (and Cotter) also testified about <br />the possible conduits which may allow mine pool water to migrate to Ralston <br />Creek including the Schwartz Trend, the West Rogers fault and the core holes <br />drilled into the Mine, 33 of which Cotter could not locate to determine if they <br />had been properly plugged or plugged at all. R:00885 -886, 00945 -948; see also <br />R:00087, 00099. <br />9 David Bird is a registered professional geologist with 27 years of mining experience, a <br />degree in geology, and a master's degree in geochemistry. R:01013. <br />19 <br />