2009-12-02_PERMIT FILE - C1981008A ‎(2)‎

• Permit No: C1981008A
• IBM Index Class Name: Permit File
• Doc Date: 12/2/2009
• Doc Name: HYDROLOGY DESCRIPTION
• Section_Exhibit Name: Section 2.04.7 Hydrology Description
• Media Type: D
• Archive: Yes

TABLE OF CONTENTS
Site Specific Ground Water. Information and Baseline Data ...................... 2.04.7-7
Introduction ..................................................... 2.04.7-7
Baseline Ground Water Levels ...................................... 2.04.7-7
Alluvial Water Levels . ....................................... 2.04.7-8
Overburden Water Levels .................................... 2.04.7-9
Dakota Coal Water Levels .................................. 2.04.7-10
Underburden Water Levels .................................. 2.04.7-10
Spoil Water Levels ........................................ 2.04.7-11
Multiple Completion Well Water Levels ........................ 2.04.7-11
Potentiometric Surfaces .................................... 2.04.7-12
Overburden .............................................. 2.04.7-12
Dakota Coal ............................................. 2.04.7-13
Underburden ............................................. 2.04.7-13
Effects of the Irrigation System on Potentiometric Surfaces ........ 2.04.7-14
Recharge ............................................... 2.04.7-14
Hydrologic Boundaries ........................................... 2.04.7-14
Infiltration and Permeability of the Unsaturated Zone .................... 2.04.7-15
Discharge ..................................................... 2.04.7-16
Evapotranspiration ........................................ 2.04.7-16
Aquifer Characteristics of the New Horizon Mining Areas ................ 2.04.7-17
Ground Water Quality ............................................ 2.04.7-18
Springs ....................................................... 2.04.7-24
Ground Water Suitability .......................................... 2.04.7-24
Present Ground Water Use . ................................. 2.04.7-24
Potential Ground Water Use ................................. 2.04.7-24
Regional Surface Water Characteristics .................................... 2.04.7-26
Regional Surface Water Flow ...................................... 2.04.7-26
Regional Surface Water Quality .................................... 2.04.7-27
2.04.7-2