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TABLE OF CONTENTS <br />SECTION 2.04.7 <br />HYDROLOGY DESCRIPTION <br />SITE SPECIFIC GROUND WATER INFORMATION AND BASELINE DATA................I <br />Introduction.......................................................................................................................... <br />l <br />Baseline Ground Water Levels............................................................................................2 <br />AlluvialWater Level............................................................................................................3 <br />Overburden Water Levels....................................................................................................3 <br />DakotaCoal Water Levels...................................................................................................4 <br />Underburden Water Levels..................................................................................................4 <br />BackfillWater Levels..........................................................................................................5 <br />Recharge and Hydrologic Boundaries.................................................................................5 <br />Infiltration and Permeability of the Unsaturated Zone........................................................5 <br />Discharge.............................................................................................................................6 <br />Evapotranspiration...............................................................................................................7 <br />Aquifer Characteristics of the New Horizon Mining Areas................................................8 <br />BaselineGround Water Quality...........................................................................................8 <br />Overburden Zone Ground Water Quality............................................................................9 <br />Coal Zone Ground Water Quality........................................................................................9 <br />Underburden Zone Ground Water Quality........................................................................12 <br />Springs and Seeps - Present Ground Water Use................................................................12 <br />Present Ground Water Use.................................................................................................13 <br />Potential Ground Water Use..............................................................................................14 <br />REGIONAL SURFACE WATER CHARACTERISTICS......................................................17 <br />RegionalSurface Water Flow............................................................................................17 <br />Regional Surface Water Quality........................................................................................20 <br />SITE SPECIFIC SURFACE WATER INFORMATION........................................................20 <br />NHN Permit Area Geomorphology...................................................................................20 <br />Surface Water Monitoring.................................................................................................21 <br />SurfaceWater Flow...........................................................................................................22 <br />SurfaceWater Quality........................................................................................................23 <br />Channel Characteristics.....................................................................................................26 <br />PredictedPeak Flows.........................................................................................................26 <br />Relationships Among Flow, TSS and TDS.......................................................................26 <br />StockWater Ponds.............................................................................................................26 <br />Section 2.04.7 Sept. 2015 (TR -11) <br />