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' The Qal-5 hydrograph shows the major increase in the alluvial water level of the White River during the first half of 1985. This rise was due to the filling of Kenney Reservoir. Since that time, fluctuations reflect the rise and fall of the reservoir level. ' 2.2.2.2 Alluvial Water Quality Data The water quality data for QAL-5 is contained in Appendix E. The statistical summary of the data is also contained in Appendix E. A statistical summary of ' depths for QAL-5 is also included in Table 2-2. The fifth annual hydrology report noted that the general increase in the average TDS that started when Kenney Reservoir was filled was beginning to slow down. Based on the data collected during the present water year, the trend in the TDS ' exhibited a slight decrease. The TDS ranged from 7928 mg/I to 6732 mg/I with an average of 7333. This compares to an average during the previous reporting period of 7795 mgA. ~~'~' . `y~ _ The water quality of the White River is considerably better than that in the alluvium indicating that permeability in the alluvium is restricted resulting in a relatively low degree of communication t between the river water and the water in the alluvium. The existence of the lake decreases the groundwater gradient which may inhibit any natural tendency for the alluvium to flush itself of the ' higher dissolved solids content. The potential effects, therefore, were projected that the dissolved solids of the White River alluvium in the vicinity of Scullion Gulch would continue to increase to a higher level and stabilize on an average basis. Apparently this more or less stable level has been reached. i 2.2.2.3 Bedrock Water Level Data Hydrographs for the 15 bedrock monitoring holes are contained in Appendix D. Table 2-2 contains a statistical summary of the water level data from each of the 15 bedrock monitoring holes. The locations of the holes are shown on Plate 1 in the pocket of this report. As noted in the original Deserado Mine permit application, the three zones being monitored (upper sandstone facies, siltstone and coal facies, and the lower sandstone) identity three different ' stratigraphic zones which lack the characteristics of typical aquifers. The strata are tight as demonstrated by pumping tests. ' The °upper sandstone facies' hydrographs, designated by the hole name ending in 'U' are water level depths in feet over time. Monitor hole 2-17U, located immediately over the East Mains, was mined under during November of 1985. The hydrograph for this monitoring period is similar to that of last year in that it shows three relatively stable readings and a final reading that dropped five feet. Longwali Panel 1 (LW-1) was mined to within about 900 feet of this location in February 1988. The ' most discernable trend in the water level data for this hole is that mining has had surprisingly little effect. 1 8 77<,~~ -~ ,, ., , 7~=.