REP22423

• Permit No: C1980001
• IBM Index Class Name: Report
• Doc Date: 12/11/2001
• Doc Name: 1992 AHR text and data
• Annual Report Year: 1992
• Permit Index Doc Type: HYDROLOGY REPORT
• Media Type: D
• Archive: No

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IV. Ground Water
GROUND WATER ELEVATIONS
Water levels in the alluvial wells at the Edna Mine have remained
constant over the previous years with minor fluctuations occurring seasonally.
Elevations of the water in the alluvial wells and the spoils well are shown in
Figure 7. As suggested in the baseline studies, the occurrence of a drawdown
in any of the wells is anticipated only during mining at the base of the slope
near Trout Creek.
In reviewing the data, it is interesting to note that the spoils well has
also reached steady state. The equilibrium of WR-1 is further evidenced
through the surface expression of a spring on the lower portion of West Ridge
near the elevation of Trout Creek.
GROUND WATER QUALITY
Comparisons of water quality data gathered from the alluvial wells at the Edna
Mine must be exercised with caution due to the differing stratigraphic units
intersected along Trout Creek adjacent to the various wells. The alluvium in
the vicinity of well TR-1.5 intersects stratigraphy above the Wadge coal seam
while the alluvium in the vicinity of TR-3 intersects stratigraphy below the
Wadge seam. Alluvium in the vicinity of TR-4 intersects even lower
stratigraphic units than those at TR-3. The influence from contact with the
differing lithologies is not able to be quantified, therefore, differences
between the wells may not be responses to mining related activities.
Temperature and off
Temperature and pH (Figure 7) in 1992 followed the expected trends with
temperature exhibiting typical seasonal fluctuations and pH remaining constant
over the monitoring period.
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