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West Elk Mine 2016 Surface Water and Groundwater Quantity and Quality Data Summary 23 <br />4.1 Mining Related Hydrologic Impacts <br />Since 1999, there have been no significant long-term adverse mining related hydrologic <br />impacts reported in surface water or spring resources in the western permit area, <br />specifically the Gribble Gulch area (WWE, 2001; HydroGeo, 2002; HydroGeo 2003; <br />HydroGeo, 2004; HydroGeo, 2005; HydroGeo, 2006; HydroGeo, 2007; HydroGeo, 2008, <br />HydroGeo, 2009, HydroGeo, 2010, HydroGeo, 2011, HydroGeo, 2012, HydroGeo, 2013; <br />HydroGeo, 2014, HydroGeo, 2015, HydroGeo, 2016). Gribble Gulch was undermined <br />from years 1995 to 1997; therefore, future long-term mining related hydrologic impacts <br />in this area are not anticipated. <br />In WY 2016 the West Elk Mine hydrologic monitoring program was conducted in <br />accordance with all permit requirements. The data collected in WY 2016 from sites in <br />the current monitoring program were adequate to assess potential mine -induced impacts <br />to the area's hydrologic system, with the exception of the damaged monitoring wells <br />listed previously. <br />During WY 2016, MCC operations were in compliance with Permit CO -0038776 limits <br />(Section 4.6.1). <br />June 2017 HydroGeo, Inc <br />