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February Monthly Report - 2002 <br />Page 2 <br />"B List" Projects <br />• Columbus Mine Portals -Mine Waste Dumps <br />• London Mine Portals -Waste Dumps <br />Work, permitting or arcangement for access is not planned until it becomes evident that <br />the work plans for these 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 />DMG has inspected the sites and approved the projects as complying with the work plans <br />and MLR Standards. No inspections were done in February due to snow cover. <br />Cement Creek Diversion and Water Treatment <br />Cement Creek diversion and water treatment was active throughout February. During the <br />month, all of Cement Creek was diverted for treatment with the remaining American <br />Tunnel flow. <br />The February 2002 monitoring results for; dissolved metals in the AT-004 discharge; <br />Cement Creek (CC-1B); American Tunnel flow before treatment (AT-1NFEL); and <br />Cement Creek below the AT-004 discharge point (CC-20) are attached. <br />Mainstem Stream Monitoring and Reference Point Stream Monitoring <br />Sunnyside sampled the reference point (A-72) and two of the three main stem gaging <br />stations (M-34 and C-48) on February 6`h. The other main stem stream and gaging station <br />(A-68) was frozen along its length near the gaging station and was not sampled. The <br />results for the main stem samples taken are attached. <br />The provisional flow at A-72 on February 6, 2002 was not available due to channel ice <br />but was less than 100 cfs, which places this sample result in the low flow category <br />(Q<100cfs). The dissolved zinc value for this sample, obtained by averaging the results <br />from two labs, was 582 ug/1. <br />