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• MINREC, INC., RED CANYON MINE II I IIIIII I II IIII III <br />~~~~'~~~~ 1997 ANNUAL HYDROLOGIC REPORT Doc Date:w <br />ul~lia4~ <br />HYDROLOGIC YEAR 10/96 - 9197 <br />The reclamation of the Red Canyon mine site was performed during 1988. A vegetation <br />study performed during 1992 demonstrated that the vegetation on the mine site was <br />adequate to control erosion. Therefore, the sediment pond and the alternate sediment <br />control for the small area exemption are no longer required. No run-off water was <br />discharged from the site during the year. <br />This year's report is formatted the same as the 1987 -1996 reports. Monitoring values are <br />compared with the average of previous values for the same month which generally include <br />monitoring results from 1981 through 1996. The averages shown in this report are slightly <br />different from prior years reports because the 1996 monitoring results are included in the <br />averages. <br />Current monitoring requirements are shown on pages 144 and 144a of the Permit. The <br />location of the monitoring sites is shown on Map 2.05.6(3)-1. <br />• SURFACE WATER <br />Table S-97 shows the surface water monitoring results for this water year compared to the <br />averages of previous years monitoring results for the same month. <br />Spot flow readings taken in May will vary because of the timing and intensity of snow melt. <br />The May 29, 1997 flow recorded for upper Ward Creek about average. The flow in lower <br />Ward Creek, recorded on May 29, 1977, was less than the historic average for May. A <br />maximum flow of 55 cfs was recorded at lower Ward Creek on May 16, 1977. <br />The late season flow in the creeks is augmented by reservoir discharge. The September <br />flow in upper Ward Creek was slightly less that its historic average and the September flow <br />in lower Ward Creek was greater than its historic average. <br />The Division's letter dated March 3, 1994 requested that Minrec sample and analyze Ward <br />Creek for Total Dissolved Solids (TDS), and the main anions and cations to allow <br />comparison of current conditions to conditions predicted in the PHC with regard to salinity <br />and TDS. The predicted values are presented in the Kaman Tempo Report on pages 68 <br />and 69. The report states that prior to mining, Ward Creek had an average TDS <br />concentration of 214 mg/I and an average SAR of 0.9. <br />• Ward Creek has been sampled for TDS and SAR from 1994 through 1997 during the low <br />flow period The following table presents the results of the four years of monitoring: <br />