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2018-03-15_REPORT - C1981010
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2018-03-15_REPORT - C1981010
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Last modified
3/20/2018 11:02:43 AM
Creation date
3/20/2018 10:27:09 AM
Metadata
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Template:
DRMS Permit Index
Permit No
C1981010
IBM Index Class Name
Report
Doc Date
3/15/2018
Doc Name
Annual Hydrology Report
From
Trapper Mining Inc
To
DRMS
Annual Report Year
2017
Email Name
RAR
Media Type
D
Archive
No
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2017 showing minimum affects from the below average precipitation in 2012 and the near and <br />above average precipitation in 2013 through 2017. The HI aquifer (GP -7) is characterized by a very <br />gradual decline the last six years after steady water levels for the previous years. The KLM aquifer <br />in well GP -8 showed a decline in 2001 through 2005 with a water level rise in 2006 and fairly steady <br />levels in 2007 through 2014. A small water level decline was observed in 2015 through 2017 in <br />well GP -8. A significant amount of well dewatering occurred from the G pit area in 2017. <br />Steady water levels had been observed in the previous four years in well GMP -1 while a <br />small increase was observed in 2005 through 2011 followed by steady levels the last six years. The <br />previous ten years show a water level rise due to the movement of Pit A to the east of this area. <br />Dewatering was produced from Pit L in 2017. The decrease in water levels in wells GD -2 and GD -3 <br />in 2006 were caused by deep exploration drilling in this area. Water levels in these two wells <br />gradually rose in 2007 and overall increased a larger amount in 2008. Water levels continued to <br />overall gradually rise into 2011 and then became overall steady in well GD -2 but declined in well <br />GD -3 until a rise was observed in 2016. The 2017 water levels in these two wells were steady in <br />2017. The water levels in KLM well GP -2 overall increased from 2008 through 2011 but steadily <br />declined in 2012 through 2017. The previous decline could have been caused by the decrease in <br />recharge and mining in this area but the present declines are likely due to less recharge. Water level <br />in well GP -5 is useful in defining natural variations in the QR aquifer for 2017. Water levels in well <br />GP -5 show a rising trend from 1993 through 1998 with a smaller rising trend from 1998 to 2002. <br />Water levels in this well then were fairly steady for five years with another overall rise from 2007 <br />through 2011. Water levels in GP -5 were fairly steady in 2012 through 2014 and a small decline in <br />2015 and 2016 likely due to less recharge but very gradually rose in 2017. Water -level changes are <br />discussed in more detail in the following section. <br />2.1.2 WATER -LEVEL CHANGES <br />Trapper Mining Company 2-3 <br />2017 Annual Report <br />
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