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SPOIL SPRING MONITORING <br />A monitoring program was initiated in 1986 and will be conducted annually <br />until such time as the monitoring requirement is eliminated. As per the <br />approved plan the annual mine wide survey is conducted during May, and <br />' springs will be measured for flow and field parameters. If a spring is <br />discharging 35 gallons per minute or greater then it will be monitored <br />' throughout the remainder of the year in accordance with the monitoring plan. <br />' Flows <br />' The field data for the May 1987 spoil spring monitoring program is presented <br />on Table 47. Plots of the historic flow data for Station 114 are presented <br /> on Figure 42. No significant spoil springs were observed•at Mine 2. The <br /> flow data indlcates that the spoil springs follow the same pattern as the <br /> surface runoff: very low flow during most of the year and a very rapid <br /> increase in flow during the spring runoff followed by a moderately rapid <br /> decrease in flow. The Spoil Spring 114 did not respond as directly to the <br /> early spring thaws in 1986 and 1987 as it did to the latter spring thaws. <br /> This is probably because the ground did not thaw completely during the early <br /> spring thaw preventing large amounts of recharge. <br /> <br /> Water Quality <br /> <br /> The summary of the May 1987 spoil spring field data is presented on Table <br /> 47. The summary of the water quality data for Station 114 is presented on <br />' Tables 50~and 51. Additional spoil spring data for Mine 1 is presented on <br /> <br /> Table 48 for Mine 1 and Table 4 for Min Plots of the historic water <br /> quality data for Station 114 are presented on Figures 49 to 51. The data <br /> indicates that while the field conductivity level of the Mine 1 spoils <br />' spring flow may approach 4600 umhos/cm the average value is approximately <br /> 3100 umhos/cm. During the winter when Foidel Creek is dominated by the <br />' spoil spring and underground mine discharges the creeks dissolved solids <br /> level approaches that of tiie spoil springs. The dissolved solids levels of <br /> Station 114 follows the same pattern as the creek because they are both <br /> influenced by the same climatologic patterns. Other than increased <br /> <br /> - 8 - <br /> <br />