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famrary 1999 Xerr Coal Can+pany ' /998 Annrml Nydrola,yy Report "CO ('rrmit lVo. G80~JJ6 ~ TOG: <br />' TABLE OF CONTENTS <br />' Section No. Pale No. <br /> 1.0 OPERATIONAL CONDITiONS ........................................................ ...................................................I <br />' 2.0 MONITORING AND ANALYSES ..................................................... ...................................................2 <br /> 3.0 MINE AREA CONFINED GROUNDWATER ................................. ...................................................3 <br />' 3.1 MINE AREA COAL AQUIFER ..................................................... ...................................................3 <br /> 3.2 MINE AREA OVERBURDEN ...................................................... ...................................................3 <br /> 4.0 MINE AREA ALLUVIAL GROUNDWATER ................................. .................................................12 <br /> 5.0 LOADOUTAREAALLUVIALCROUNUWATER ........................ .................................................IS <br />' 6.0 MINE AREA SURFACE WATER ..................................................... .................................................21 <br /> 7.0 LOADOUT AREA SURFACE WATER ............................................ .................................................28 <br />' 0 WELL INSPECTION <br />8 30 <br /> . <br />.......................................................................... ................................................. <br />' 9.0 FUTURE MONITORING ................................................................... .................................................32 <br />' LIST OF TABLES <br /> Table No. Description Pale No. <br />' <br /> 1 1998 Groundwater Quality Statistics ................................................. ............... 4 <br /> ~ Site 79-61 Historic Mine Area Coal Aquifer Water Quality Data ...... ............... 6 <br />' 3 Site 79-1 Historic Mine Area Overburden Water Quality Data ......... ............... 8 <br /> 4 Site 79-2 Historic Mine Area Overburden Water Quality Data ......... ............... 9 <br /> 5 Site AO-2A Historic Mine Area Alluvial Water Quality Data .......... ............. 13 <br />t 6 Site AP-1 Historic Loadout Area Alluvial Water Quality Data ......... ............. 16 <br /> 7 Site AP-2 Historic Loadout Area Alluvial Water Quality Data ......... ............. 17 <br /> 8 1998 Surface Water Statistics -Sediment Ponds ................................. ............. 22 <br />' 9 1998 Surface Water Statistics -Selected Mine Area Surface Stations .. ............. 24 <br /> ]0 1998 Surface Water Stattstics -Loadout Area Surface Stations ........... ............. 29 <br /> 11 Monitoring Well Depths .................................................................... ............. 30 <br />1 <br /> LIST OF FIGURES <br />' <br /> Figure No. Description Pale No. <br />' 1 Mine Area Aquifer Water Level ........................................................ ............. 5 <br /> 2 EC vs. TDS, Well 79-61 ..................................................................... ............. 7 <br /> 3 EC vs. TDS, We1179-1 ....................................................................... ............. 10 <br />' 4 EC vs. TDS, Well 79-2 ....................................................................... ............. 11 <br /> 5 EC vs. TDS, Well AO-2A .................................................................. ............. 14 <br />' Montgomery Wauon "P.O. Box 774018 "Steamboat Springt, Colorado 80477"(970f 8796160 <br />' T\dVNnnu(RrpnlryvPVYVnNN.doy. Reps <br />l/II/9Y rlt <br />