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• 1999 AHR McClane & Munger Canyon Mines Page 4 <br />Surface water samples from East Salt Creek during the 1999 water year were obtained <br />in three quarters. Results from all water samples collected in 1999 are presented in <br />Table 4. Note that when the mine was placed in Temporary Cessation the sample list <br />was reduced as allowed by the mine permit. <br />The sample sites on McClane Creek were dry all four quarters. <br />Groundwater <br />Table 5 shows the results of groundwater sampling during 1999. The average static <br />water level for the baseline years of 1981 and 1986 is also shown. Results of quality <br />sampling are consistent with the results from previous years. GW-4 in close proximity <br />to a hay field that is irrigated during dry periods and in danger of being eroded with an <br />oxbow, has been replaced with GW-3. GW-3 is located adjacent to the road south of <br />GW-4 and should be outside of the influence of the irrigation of the hay field. Refer to <br />Figure 4.2-2 of the McClane Canyon Permit. The Division of Minerals & Geology has <br />approved this substitution. <br />Pond Discharges <br />There were no discharges from either the sediment pond at McClane or the sediment <br />trap at Munger Canyon. <br />PROBABLE HYDROLOGIC CONSEQUENCES <br />The mines will have negligible effect upon the hydrologic regime of East Salt Creek. <br />The area disturbed is small, sedimentation and surface water systems have functioned <br />well for over ten years. The inherent poor quality of surface water in the area is the <br />result of site specific environmental factors not from any impact caused by the mines. <br />Most storm events that have exceeded the design criteria required by the Division of <br />Minerals & Geology have not been a problem for the system to handle. The effect that <br />the mine has on the groundwater hydrology of East Salt Creek has been decreased <br />further since water is now being imported to the mine and no further dewatering will <br />take place until water in Section 001 backs up to the seals and is drained to the water <br />sump or water is intersected east of the current workings. <br />~1 <br />