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' second 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 TDS ranged from 5230 mgR to 4320 mgA with an average of 4750. This compares to an average during the previous reporting period of 4325 mg/I. A graph showing the magnesium, chloride and TDS levels for QAL-5 is also included in Appendix E. ' 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 between the river water and the water in the alluvium. The existence of Kenney Reservoir 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. Although, in the past, a stable level appeared to have been reached, there is a slight increase in TDS this year. 2.2.2.3 Bedrock Water Level Data Hydrographs for the 26 bedrock monitoring holes are contained in Appendix D. Table 2-2 contains a statistical summary of the water level data from the 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) identify 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 average water level dropped about 3.4 feet from the previous year. Longwall Panel 1 (LW-1) was mined to within about 900 feet of this location in ' February 1988. ' Monitor holes 2-7U and TW2-7U are located on the same location. Although the water levels in the two holes have been comparable, fluctuations and trends in each hole have in the past been quite dissimilar. A longwall gateroad (4th East) was developed past this location in June 1988. 1 7 1