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<br />The Dal-5 hydrograph shows the major increase in the alluvial water level of the White River <br />during the first half of 1985. This rise was due to the filling of Kenney Reservoir. Since that time. <br />' fluctuations reflect the rise and fall of the reservoir level. <br />' 2.2.2.2 Alluvial Water Quality Data The water quality data for DAL-5 is contained in Appendix <br />E. The statistical summary of the data is also contained in Appendix E. A statistical summary <br />' of depths for QAL-5 is also included in Table 2-2. The last hydrology report noted that the <br />general increase in the average TDS that started when Kenney Reservoir was filled was <br />t beginning to slow down. Based on the data collected during the present water year, the trend <br />in the TDS exhibited a slight rise. The TDS ranged from 8166 mg/I to 7466 mg/I with an average <br />of 7795. This compares to an average during the previous reporting period of 7742 mg/I. <br />' The water quality of the White River is considerably better than that in the alluvium indicating that <br />permeability in the alluvium is restricted resulting in a relatively low degree of communication <br />between the river water and the water in the alluvium. The existence of the lake decreases the <br />groundwater gradient which may inhibit any natural tendency for the alluvium to flush itself of the <br />' higher dissolved solids content. The potential effects, therefore, are that the dissolved solids of <br />the White River alluvium in the vicinity of Scullion Gulch may continue to increase to a higher <br />' level and stabilize on an average basis. Future data may indicate whether or not this more-or- <br />less stable level has been reached. <br />2.2.2.3 Bedrock Water Level Data Hydrographs for the 15 bedrock monitoring holes are <br />contained in Appendix D. Table 2-2 contains a statistical summary of the water level data from <br />' each of the 15 bedrock monitoring holes. The locations of the holes are shown on Plate 1 in the <br />pocket of this report. As noted in the original Deserado Mine permit application, the three zones <br />being monitored (upper sandstone facies, siltstone and coal facies, and the lower sandstone) <br />identity three different stratigraphic zones which lack the characteristics of typical aquifers. The <br />strata are tight as demonstrated by pumping tests. <br />' The 'upper sandstone facies' hydrographs, designated by the hole name ending in "U' are water <br />level depths in feet over time. Monitor hole 2-17U, located immediately over the East Mains, was <br />t mined under during November of 1985. The hydrograph for this monitoring period shows three <br />relatively stable readings and a final reading that dropped five feet. Longwall Panel 1 (LW-1) was <br />' mined to within about 900 feet of this location in February 1988. The most discernable trend in <br />the water level data for this hole is that mining has had surprisingly little effect. <br />1 <br />' 8 <br /> <br />