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West Elk Mine 2014 Annual Hydrology Report 32 Table 7. Summary of the Groundwater Monitoring Program Monitored Station Monitored Area Water Level Measurement Field WQ H, EC, tem) I Annual Lab Water Quality Period of Record FacilitoyArea 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 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 1996 to present E-7 Mine facility area 3 x Year 3 x Year Low Flow Period 1999 to present Upper Dry Fork SOD mine panels area 3 x Year 3 x Year Low Flow Period 2003 to present Lower Dry Fork Alluvial SOD mine panels area 3 x Year 3 x Year Low Flow Period 2003 to present Wells Completed in the Barren Member above F -Seam SOM-80 NE 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 OM -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 OM -23-H4 SOD mine panels area 3 x Year 3 x Year Low Flow Period 2005 to 2013 Wells 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 3 x Year Low Flow Period(') 1978 to present OM -23-H-3 SOD mine panels area 3 x Year 3 x Year Low Flow Period(') 2005 to 2011 Wells Completed in the E -Seam 6-27-1 SE mine panels area 1996 to 2005 03-11-1 North of Box Canyon mine panels area 3 x Year 3 x Year Low Flow Period 2003 to present OM -3E SOD mine panels area 2003 to 2011 OM -23-H-2 SOD mine panels area 2005 to 2008 Wells Completed above the E -Seam 6-2-2 SOD mine panels area 1 3 x Year 3 x Year Low Flow Period 1996 to 2012 Wells Completed in B -Seam SOM-129-H North of NE mine panels area 3 x Year 3 x Year Low Flow Period 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 1-11-1 North of Box Canyon mine panels area 3 x Year 3 x Year Low Flow Period(') 2001 to present SOM-3B SOD mine panels area 2003 to 2008 SOM-23-H-1 SOD mine panels area 2005 (suspect data 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 Shaded cells indicate wells with compromised, blocked, or collapsed casing. 1) For sites with >5 years of data, lab parameters include TSS, TDS, EC, pH, and Fe (dissolved & total). 2) For sites with 5 years or less data, see Table 2. June 2015 HydroGeo, Inc.