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West Elk Mine 2014 Annual Hydrology Report IV <br />4.5 Colorado Department of Public Health and Environment, Colorado <br />Discharge Permit System (CDPS) Summary.............................................40 <br />4.5.1 CDPS Permit CO-0038776............................................................40 <br />4.5.1.1 Outfall 007A Amendments..........................................40 <br />4.5.1.2 Outfall 017A Amendments..........................................41 <br />4.5.1.3 Bio -Monitoring Testing for Toxicity ...........................41 <br />4.5.2 Sanitary Wastewater......................................................................41 <br />4.5.3 Sedimentation Ponds......................................................................41 <br />4.6 Permit Compliance.....................................................................................42 <br />4.6.1 Outfall 007A (Waste Water Treatment Pond (WWTP).................42 <br />4.6.2 Outfalls 004A, 005A, 008A, 009A, OI IA, 012A, 013A, 014A, <br />015A, 016A, 017A, 018A, and 019 ...............................................42 <br />5.0 ASSESSMENT OF MINE -INDUCED HYDROLOGIC IMPACTS IN WY 2014 <br />AND ANTICIPATED IMPACTS IN WY 2015 ...................................................46 <br />5.1 Surface Water.............................................................................................46 <br />5. 1.1 Impacts to Area Stream Water Quality..........................................46 <br />5.1.2 Impacts to Area Stream Water Quantity........................................48 <br />5.1.3 Impacts to the North Fork of the Gunnison River .........................49 <br />5.1.3.1 Salinity.........................................................................49 <br />5.2 Springs and Seeps......................................................................................50 <br />5.2.1 Impacts to Spring and Seep Water Quality....................................50 <br />5.2.2 Impacts to Spring and Seep Water Quantity..................................52 <br />5.3 Stock Ponds and USFS Water Resources..................................................53 <br />5.4 Groundwater..............................................................................................53 <br />5.4.1 Impacts to Groundwater Quality....................................................54 <br />5.4.2 Impacts to Groundwater Quantity..................................................55 <br />6.0 ADEQUACY OF THE MONITORING PROGRAM...........................................56 <br />6.1 Mining Related Hydrologic Impacts..........................................................56 <br />7.0 SUMMARY...........................................................................................................5 <br />7 <br />8.0 REFERENCES......................................................................................................59 <br />June 2015 HydroGeo, Inc. <br />