REP45364

• Permit No: C1981018
• IBM Index Class Name: Report
• Doc Date: 2/24/1997
• Doc Name: 1996 AHR
• Annual Report Year: 1996
• Permit Index Doc Type: HYDROLOGY REPORT
• Media Type: D
• Archive: No

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detected at SW1-1, SW24-1 and SW11-1. The TDS was 595mg/I at SWi-1, 1610 mg/I at SW11-
1, and 488 mgA at SW24-1.
2.2.2 ground Water MonltoNng Data Groundwater monitoring data consists of water levels
measurements. Tabulation of the raw data is incuded in Appendix C Water level measurements
of eleven (11) additional stations in Federal Lease C-8424 and C-8425 were initiated in this
monitoring period. Hydrographs for the 26 stations (monitor holes) from which water level data was
collected are included in Appendix D. Table 2-2 is a statistical summary of the water level data.
2.2.2.1 Alluvial Water Level Data Water level data has been collected irom the one remaining
original alluvial aquifer monitoring hole (QAL-5) and the Refuse Disposal Area alluvial monitoring
hole (RM-1). Five other alluvial monitoring holes were inundated by Kenney Reservoir. Ahydro-
graph of the water level data for QAL-5 is contained in Appendix E. The statistical summary of the
water level data for QAL-5 is also incuded in Table 2-2. No water has yet been detected in RM-1.
The locations of these monitoring holes are shown on Plate 1 in the pocket of this report. The dal-5
hydrograph shows a significant increase in the alluvial water level of the White River since the
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 ~uallty 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 (}AL-5 is also incuded 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 continues to
decrease. The TDS ranged from 4410 mg/I to 4210 mgfl with an average of 4325. This compares
to an average during the previous reporting period of 4708 mgA. A graph showing the magnesium,
chloride and TDS levels for QAL-5 is also incuded 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 vianity of Scullion Gulch would continue to
increase to a higher level and stabilize on an average basis. Apparently this more or less stable
level was reached and a decreasing Vend continues.
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