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SECTION 2.04.7 <br />HYDROLOGY DESCRIPTION <br />Table of Contents <br />Page No. <br />SITE SPECIFIC GROUND WATER INFORMATION AND BASELINE DATA 1 <br />Introduction 1 <br />Baseline Ground Water Levels 2 <br />Alluvial Water Level 3 <br />OverburdenWater Levels 3 <br />Dakota Coal Water Levels 3 <br />Underburden Water Levels 4 <br />Backfill Water Levels 4 <br />Recharge and Hydrologic Boundaries 4 <br />Infiltration and Permeability of the Unsaturated Zone 5 <br />Discharge 5 <br />Evapotranspiration <br />6 <br />Aquifer Characteristics of the New Horizon Mining Areas <br />6 <br />Baseline Ground Water Quality <br />7 <br />Overburden Zone Ground Water Quality <br />8 <br />Coal Zone Ground Water Quality <br />8 <br />Underburden Zone Ground Water Quality <br />10 <br />Springs and Seeps — Present Ground Water Use <br />10 <br />Present Ground Water Use <br />11 <br />Potential Ground Water Use <br />11 <br />REGIONAL SURFACE WATER CHARACTERISTICS 14 <br />Regional Surface Water Flow 14 <br />Regional Surface Water Quality 16 <br />SITE SPECIFIC SURFACE WATER INFORMATION <br />16 <br />NHN Permit Area Geomorphology <br />16 <br />Surface Water Monitoring <br />17 <br />Surface Water Flow <br />18 <br />Surface Water Quality <br />19 <br />Channel Characteristics <br />21 <br />Predicted Peak Flows <br />21 <br />Relationships Among Flow, TSS and TDS <br />21 <br />Stock Water Ponds <br />21 <br />October 2013 (TR -05) <br />E: \New Horizon \DRMS \NHN Permit \04_Techmcal Revisions TR \TR -05 \Documents from Jason \2.04.7 TOC Hydrologic Description TR- 05.docx <br />