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1st Quarter and March 1999 Monthly Report <br /> Page 2 <br /> ♦ Sunnyside Mine Pool Mitigation - Alkaline Solution Injection <br /> This project was not active in March or the 1st Quarter of <br /> 1999 . The water pool pH, at the American Tunnel bulkhead, <br /> was 4 . 68 and the bulkhead pressure was 371 psi at the end <br /> of March. During the 1st Quarter, the pressure change was <br /> +3 psi with most of this change occurring in January. <br /> Sunnyside will continue to monitor these parameters to <br /> determine if the pool is approaching physical equilibrium. <br /> The annual mine pool water sample was taken in February. <br /> These results are attached. <br /> "B List" Projects <br /> ♦ Columbus Mine Portals -Mine Waste Dumps <br /> ♦ London Mine Portals - Waste Dumps <br /> Work, permitting or arrangement for access is not planned <br /> until it becomes evident that the work plans for these <br /> projects require implementation. <br /> ♦ Mayflower Facility - Upland Hydrological Control <br /> ♦ Tailings Pond No. 4 Surface Drainage Modification <br /> ♦ Tailings Pond No. 4 Upland Groundwater Diversion <br /> There was no activity on these projects during March or the <br /> 1st Quarter, 1999 due to snow cover. It is planned to <br /> resume work on these projects in the spring of 1999 . <br /> Progress pictures were not taken due to snowcover. <br /> Cement Creek Diversion and Water Treatment <br /> Cement Creek diversion and water treatment was active <br /> continuously throughout March and the 1st Quarter, 1999 . <br /> The flow of Cement Creek throughout March and the 1st <br /> Quarter was below the treatment system's capacity and the <br /> entire flow was diverted for treatment. The flow diverted <br /> and treated during March ranged from 181 G.P.M. to 708 <br /> G.P.M. This was also the flow range diverted and treated <br /> for the 1st Quarter. <br />