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PERMFILE64340
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PERMFILE64340
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Last modified
8/24/2016 11:10:18 PM
Creation date
11/20/2007 8:23:03 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981010
IBM Index Class Name
Permit File
Doc Date
3/10/1988
Doc Name
Annual Hydrologic Report
Section_Exhibit Name
Appendix W 1987 Report Section 2.0 to 2.5 (CS to Part 2.0)
Media Type
D
Archive
No
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n <br />U <br />levels had been rising in the QR aquifer at well GD2 for most of 1986. <br />The 1987 water levels have shown an overall decline since November <br />1986 to levels below those of early 1986. Levels in this area of the <br />QR aquifer could be returning to pre-mine conditions. Past mining in <br />the area upgradient of well GD2 had caused elevated water levels. <br />Figures A-10, A-11 and A-12 present the water level changes in <br />the QR, HI and Third and Second White Sandstone aquifers, <br />respectively, at the GE site. Water levels in all three of these <br />aquifers have risen in 1987. Water-level rises have been much less in <br />the Third and Second White Sandstone and the greatest in the QR <br />aquifer. Mining has occurred within 2000 feet of these wells .in the <br />• adjacent permit while mining in the C pit was approximately 6000 feet <br />from these wells. The majority of the drawdowns observed at these <br />wells were probably not from Trapper Mine dewatering. <br />water levels in the GF wells are tabulated in Tables A-4 and A-5 <br />of Appendix A. Wells GF1 and GF3 are flowing wells while the casing on <br />well GF2 was recently extended so it is no longer a flowing well. <br />Figure A-13 shows the water-level elevations in the Twentymile <br />Sandstone at GF1. Water levels have been significantly lower in 1987 <br />than they were in 1986: This change is not thought to be caused by <br />mining. Watez levels were gradually increasing in well GF2 (see <br />Figure A-14) until mid-1987 when the levels declined. The water <br />levels have risen at a fast rate in the xLM aquifer in this area in <br />• 1987 (see Figure A-15, well GF3). water levels in well GF4 continued <br />2-5 <br />
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