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• TABLE OF CONTENTS <br />SECTION 2.04.7 <br />HYDROLOGY DESCRIPTION <br /> SITE SPECIFIC GROUND WATER INFORMATION AND BASELINE DATA .... .... 2.04.7-1 <br /> Introduction ................................................. .... 2.04.7-1 <br /> Baseline Ground Water Levels .................................. .... 2.04.7-1 <br /> Alluvial Water Levels . ................................... .... 2.04.7-2 <br /> Overburden Water Levels ................................ .... 2.04.7-3 <br /> Dakota Coal Water Levels ............................... .... 2,04.7-3 <br /> Underburden Water Levels ............................... .... 2.04.7-4 <br /> Spoil Water Levels ..................................... .... 2.04.7-5 <br /> Multiple Completion Well Water Levels ..................... .... 2.04.7-5 <br /> Potentiometric Surfaces ................................. .... 2,04.7-6 <br /> Overburden ........................................... .... 2,04.7-6 <br /> Dakota Coal .......................................... .... 2.04.7-6 <br />• Underburden .......................................... <br />Effects of the Irrigation System on Potentiometric Surfaces ..... .... 2.04.7-7 <br />.... 2.04.7-7 <br /> Recharge ............................................ .... 2.04.7-8 <br /> Hydrologic Boundaries ........................................ .... 2.04.7-8 <br /> Infiltration and Permeability of the Unsaturated Zone ................. .... 2.04.7-8 <br />Discharge ............................................. ......... 2.04.7-9 <br />Evapotranspiration ................................ ........ 2.04.7-10 <br />Aquifer Characteristics of the New Horizon Mining Areas ........ ........ 2.04.7-11 <br />Ground Water Quality .................................... ........ 2.04.7-12 <br />Springs ............................................... ........ 2.04.7-17 <br />Ground Water Suitability .................................. ........ 2.04.7-17 <br />Present Ground Water Use . ......................... ........ 2.04.7-17 <br />Potential Ground Water Use ......................... ........ 2.04.7-18 <br />REGIONAL SURFACE WATER CHARACTERISTICS ........................ 2.04.7-19 <br />Regional Surface Water Flow ...................................... 2.04.7-19 <br />Regional Surface Water Quality .................................... 2.04.7-20 <br />Revised 18 Aug 203 <br />