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West Elk Mine 2004 Annual Hydrology Report iii <br />• 4.3.5 Pond SG-1 ..........................................................................................................30 <br />4.4 Biomonitoring Testing for Toxicity ..................................................................................30 <br />4.5 Mine Water Inflows ............................................................................................... ..........31 <br />4.5.1 NW Panels Sealed Sump ........................................................................... ..........31 <br />4.5.2 NE Panels Sealed Sump ............................................................................ ..........31 <br />4.5.3 Mine Water Sampling ............................................................................... ..........31 <br />4.6 Mine Water Balance .............................................................................................. ..........31 <br />5.0 ASSESSMENT OF MINE-INDUCED HYDROLOGIC IMPACTS AND ANTICIPATED <br />IMPACT IN WY 2005 ............................................................................................................. ..........32 <br />5.1 Surface Water ........................................................................................................ ..........32 <br />5.1.1 Impacts to Area Stream Water Quantity and Quality .................................. ..........32 <br />5.1.2 Impacts to the North Fork of the Gunnison River ....................................... ..........33 <br />5.2 Springs and Seeps .................................................................................................. ..........34 <br />5.2.1 Impacts to Water Quantity and Quality ...................................................... ..........34 <br />5.3 Impacts to Stock Ponds and USFS Water Resources .............................................. ..........35 <br />5.4 Ground Water ........................................................................................................ ..........35 <br />5.4.1 Impacts to Ground Water Quantity and Quality ......................................... ..........35 <br />• 6.0 ADEQUACY OF THE MONITORING PROGRAM ............................................................... ..........36 <br />6.1 Mining Related Hydrologic Impacts ....................................................................... .........37 <br />6.2 Proposed Revisions to the Hydrologic Monitoring Program .................................... .........38 <br />7.0 SUMMARY .............................................................................................................................. .........40 <br />8.0 REFERENCES ......................................................................................................................... .........42 <br />r 1 <br />U <br />August 2005 HydroGeo, Inc. <br />