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equilibrium to be reestablished may be as great as 100 years or more. Of course this is of no serious <br />• consequence as no uses for this groundwater in these formations exists. To date, January 1999, no <br />significant inflows of water have been encountered in the Deserado Mine. <br />The disposal of the prep plant thickener water in the D-seam workings will have no underground <br />consequences. The water underground is unlikely to affect any aquifer or any river since the gradient of the <br />storage area is away from the mine openings. The gradient of the proposed storage area is 7 degrees to <br />10 degrees northeasterly, the direction of dip being away from mine openings. Underlying strata consists of <br />shale and siltstone. The water will remain in the sealed area with no surface discharge or effects to the <br />hydrologic regime. If necessary, a submersible pump could be re-installed at the SDH-2 location for <br />dewatering. Discharge from this location would meet NPDES Permft requirements. <br />In summary, the impact of mining on the groundwater hydrologic system (flow, TDS, TSS, total iron, pH and <br />total manganese) will be minimal, primarily because of the limited amount of groundwater which is naturally <br />found in the area. A slight improvement in the quality of water reaching the Whte River may result when <br />water is brought to the surface and consumptively used or discharged. <br />II.C.5.c Alternative Water Suoaly Rule 4.05.15 requires that altemaGve sources of water supply be <br />identified if mining impacts will result in the contamination, diminution, or interruption of existing sources, <br />Because no significant hydrologic impacts are expelled as a result of mining in the lease area, no <br />altemaGve water supply needs to be identified except as mentioned earlier with regard to replacing water <br />• that may be temporarily lost from the stock ponds in subsidence areas until repair or replacement of the <br />pond can be completed. <br />II.C.5.d Summary of Monitorinsr Results This summary is intended to characterize the monitoring results <br />and facilkate a general comparison with the anticipated impacts predicted from the baseline data. The <br />reader is referred to the annual hydrology reports submitted each year by BME (formerly Western Fuels- <br />Utah)for the actual data acquired through the hydrologic montoring program itself. <br />In general, two major events have impacted the hydrologic regime in the area of the Deserado Mine: <br />1. The construction and operation of the Deserado Mine and surface facilities. <br />2. The construction of a dam and reservoir (Kenney Reservoir) on the White River adjacent to the <br />Deserado Mine. <br />The construction and operation of the Deserado Mine and surface facilities has produced impacts that are <br />quite similar to those predicted from the baseline data. Acid and toxic forming materials have not been a <br />problem. The only water source affected has been the White River by the withdrawal and subsequent <br />discharge of water. Through efficient water management and use awareness the withdrawal rate has <br />• always been less than that projected. Sediment yields to the White River have been reduced by the use of <br />Permit Renewal #3 (Rev. 1/00) II.C-85 <br />