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West Elk Mine 2013 Annual Hydrology Report 57 <br />6.0 ADEQUACY OF THE MONITORING PROGRAM <br />MCC's hydrologic monitoring program operates in accordance with CDRMS Permit No. <br />C- 1980 -007, as revised by Technical Revision No. TR -88 and Permit Revision No. PR- <br />10. PR -10 includes a revised comprehensive hydrologic monitoring plan for the entire <br />permit area including the South of the Divide (SOD) mine plan area. A more detailed <br />description of the hydrologic monitoring plan is presented in Exhibit 71 in the permit <br />document (CDRMS, 2006). <br />6.1 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, <br />2013). Gribble Gulch was undermined from years 1995 to 1997; therefore, future long- <br />term mining related hydrologic impacts in this area are not anticipated. <br />In WY 2013 the West Elk Mine hydrologic monitoring program was conducted in <br />accordance with all permit requirements. The data collected in WY 2013 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 2013, MCC operations were in compliance with Permit CO- 0038776 limits <br />with the exception of a single exceedance described previously in this report (Section <br />4.6.1). <br />June 2014 HydroGeo, Inc. <br />