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~ III Illlllllllllllll MINREC, INC., RED CANYON MINE Doc Date:~t~ ~~ NA'~'`~'-71996 ANNUAL HYDROLOGIC REPORT II ~ 3~ ia~~ HYDROLOGIC YEAR 10/95 - 9/96 The reclamation of the Red Canyon mine site was performed during 1988. A vegetation study performed during 1992 demonstrated that the vegetation on the mine site was adequate to control erosion. Therefore, the sediment pond and the alternate sediment control for the small azea exemption are no longer required. No run-off water was discharged from the site during the year. This year's report is formatted the same as the 1987 - 1995 reports. Monitoring values aze compared with the average of previous values for the same month which generally include monitoring results from 1981 through 1995. The averages shown in this report are slightly different from prior years reports because the 1995 monitoring results are included in the averages. Current monitoring requirements are shown on pages 144 and 144a of the Permit. The location of the monitoring sites is shown on Map 2.05.6(3)-l. SURFACE WATER Table S-96 shows the surface water monitoring results for this water year compared to the averages of previous years monitoring results for the same month. Spot flow readings taken in May will vary because of the timing and intensity of snow melt. The May flow in Ward Creek was less than prior years averages. The late season flow in the creeks is augmented by reservoir dischazge. The September flow in upper Ward Creek was almost equal to its historic average and the September flow in lower Wazd Creek was slightly less than its historic average. The Division's letter dated March 3, 1994 requested that Minrec sample and analyze Ward Creek for Total Dissolved Solids ('I'DS), and the main anions and cations to allow comparison of current conditions to conditions predicted in the PHC in regards to salinity and TDS. The predicted values are presented in the Kaman Tempo Report on pages 68 and 69. The report states that prior to mining, Wazd Creek had an average TDS concentration of 214 mg/l and an average SAR of 0.9. Ward Creek was sampled for TDS and SAR in 1994, 1995 and 1996 during the low flow period • The following table presents the results of the three years of monitoring.