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West Elk Mine 2016 Surface Water and Groundwater Quantity and Quality Data Summary 12 <br />Table 7. Summary of the Groundwater Monitoring Program <br />Monitored Station <br />Monitored Area <br />Water Level <br />Measurement <br />Field WQ <br />(pH, EC, tem <br />Annual Lab <br />Water QualityRecord <br />Period of <br />FacilityArea Wells and Alluvial Wells <br />P-3 (MW -8) Mine facility area 3 x Year 3 x Year Low Flow Period 1985 to present <br />P-4 (MW -9) Mine facility area 3 x Year 3 x Year Low Flow Period 1985 to present <br />P-6 Mine facility area 3 x Year 3 x Year Low Flow Period 1997 to present <br />P-7 Mine facility area 3 x Year 3 x Year Low Flow Period 1997 to present <br />E-1 Mine facility area 3 x Year 3 x Year Low Flow Period 1996 to present <br />E-7 Mine facility area 3 x Year 3 x Year Low Flow Period 1999 to present <br />Upper Dry Fork Alluvial SOD mine panels area 3 x Year 3 x Year Low Flow Period 2003 to present <br />Lower Dry Fork Alluvial SOD mine panels area 1 3 x Year 3 x Year I Low Flow Period 2003 to present <br />Wells Completed in the Barren Member above F -Seam <br />SOM-80 NE mine panels area 3 x Year 3 x Year Low Flow Period (1) 1979 to present <br />SOM-13 North of NE mine panels area 1979 to 2006 <br />OM -45-1-12 SW mine panels area 1979 to 2005 <br />SOM-45-H1 SW mine panels area 3 x Year 3 x Year Low Flow Period 1979 to present <br />SOM-23-H-4 SOD mine panels area 1 3 x Year 3 x Year Low Flow Period (1) 2005 to 2013 <br />Wells Completed in the F -Seam <br />OM -2-H SW mine panels area 1981 to 2005 <br />OM -16-H SW mine panels area 1981 to 2005 <br />SOM-C-76 SOD mine panels area 3 x Year 3 x Year Low Flow Period (1) 1978 to present <br />OM -23-H-3 SOD mine panels area 3 x Year 3 x Year Low Flow Period 2005 to 2011 <br />Wells ConmWiWpleded in theE-Seam <br />6-27-1 <br />SE mine panels area <br />1996 to 2005 <br />3-11-1 <br />North of Box Canyon mine <br />panels area <br />3 x Year <br />3 x Year <br />Low Flow Period <br />2003 to present <br />OM -3E <br />SOD mine panels area <br />2003 to 2011 <br />OM -23-H-2 <br />SOD mine panels area <br />2005 to 2008 <br />Wells Completed above the E -Seam <br />6-2-2 SOD mine panels area 1 3 x Year 3 x Year Low Flow Period tl> 1996 to 2012 <br />Wells Completed in B -Seam <br />OM -129-H <br />North of NE mine panels area <br />3 x Year <br />3 x Year Low Flow Period p) <br />1993 to 2011 <br />So. W-1 <br />South of SW mine panels area <br />1996 to 2005 <br />RAV -4B <br />Box Canyon mine panels area <br />3 x Year <br />3 x Year Low Flow Period <br />1995 to present <br />01-11-1 <br />North of Box Canyon mine <br />panels area <br />3 x Year <br />3 x Year Low Flow Period <br />2001 to present <br />OM -3B <br />SOD mine panels area <br />2003 to 2008 <br />OM -23-H-1 <br />SOD mine panels area <br />2005 (suspect <br />data <br />SW mine panels area— southwest B -seam longwall panels <br />SE mine panels area — southeast B -seam longwall panels <br />Box Canyon mine panels area — Box Canyon B -seam longwall panels <br />W. Flatiron mine panels area — West Flatiron B -seam longwall panels <br />Jumbo Mountain mine panels area — Jumbo Mountain B -seam longwall panels <br />SOD mine panels area — South of the Divide E -seam longwall panels <br />Shaded cells indicate wells with compromised, blocked, or collapsed casing. <br />1) For sites with >5 years of data, lab parameters include TSS, TDS, EC, pH, and Fe (dissolved & total). <br />2) For sites with 5 years or less data, see Table 2. <br />June 2017 HydroGeo, Ina <br />