2016-12-01_PERMIT FILE - C1980007 (6)

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2016 Recommended Modifications to the West Elk Mine Hydrologic Monitoring Network 45 Table 3. Summary of the Groundwater Monitoring Network Monitored Station Monitored Area Water Level Measurement Field WQ (pH, EC, temp) Annual Lab Water Quality Period of Record Facility Area Wells and Alluvial Wells P-3 MW -8 Mine facility area 3 x Year 3 x Year Low Flow Period ' 1985 to present P-4 MW -9 Mine facility area 3 x Year 3 x Year Low Flow Period" 1985 to present P-6 Mine facility area 3 x Year 3 x Year Low Flow Period tD 1997 to present P-7 Mine facility area 3 x Year 3 x Year Low Flow Period 1997 to present E-1 Mine facility area 3 x Year 3 x Year Low Flow Period 1° 1996 to present E-7 Mine facility area 3 x Year 3 x Year Low Flow Period 1999 to present Upper Dry Fork Alluvial ' SOD mine panels area 3 x Year 3 x Year Low Flow Period ' 2003 to present Lower Dry Fork Alluvial 1D SOD mine panels area 3 x Year 3 x Year Low Flow Period ° 2003 to present Wells Contypleted in the Barren Member above F -Seam SOM-80 NF mine panels area 3 x Year 3 x Year Low Flow Period 1979 to present SOM-13 North of NE mine panels area 1979 to 2006 SOM-45-H1 SW mine panels area 1979 to 2005 SOM-45-1-12 SW mine panels area 3 x Year 3 x Year Low Flow Period'" 1979 to present SOM-23-1-1-4 I SOD mine panels area 1 3 x Year 1 3 x Year Low Flow Period ' 2005 to 2013 We Completed in the F -Seam OM -2-H SW mine panels area 1981 to 2005 OM -16-H SW mine panels area 1981 to 2005 SOM-C-76 SOD mine panels area 3 x Year 1'cdr Low Flow Period "' 1978 to present OM -23-H-3 SOD mine panels area Low Flow Period ' 2005 to 2011 We Completed in the E -Seam 6-27-1 SE mine panels area 1996 to 2005 North of Box Canyon mine 3-11-1 panels area 3 x Year 3 x Year Low Flow Period 2003 to present SOM-3E SOD mine panels area 2003 to 2011 SOM-23-H-2 I SOD mine panels area 2005 to 2008 Wells Completed above the E -Seam 6-2-2 SOD mine panels area Low Flow Period ' 1996 to 2012 Wells Completed in —B -Seam OM -129-H North of NE mine panels area Low Flow Period 'Q 1993 to 2011 So. W-1 South of SW mine panels area 1996 to 2005 RAV -4B Box Canyon mine panels area 3 x Year 3 x Year Low Flow Period ' 1995 to present 01-11-1 North of Box Canyon mine panels area 3 x Year 3 x Year Low Flow Period'" 2001 to present OM -3B SOD mine panels area 2003 to 2008 OM -23-H-1 SOD mine panels area 2005 (suspect data Highlighted cells indicate wells with compromised, blocked, or collapsed casing SW mine panels area— southwest B -Seam longwall panels SE mine panels area — southeast B -Seam longwall panels Box Canyon mine panels area — Box Canyon B -Seam longwall panels W. Flatiron mine panels area — West Flatiron B -Seam longwall panels Jumbo Mountain mine panels area — Jumbo Mountain B -Seam longwall panels SOD mine panels area — South of the Divide E -seam longwall panels 1) For sites with >5 years of data, lab parameters include TSS, TDS, EC, pH, and Fe (dissolved & total). August 2016 HydroGeo, Inc.