REP17383

• Permit No: C1981014
• IBM Index Class Name: Report
• Doc Date: 4/7/2005
• Doc Name: 2004 Annual Hydrology Report
• From: Northwest Colorado Consultants Inc
• To: DMG
• Annual Report Year: 2004
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

TABLE OF CONTENTS
Section No. Page No.
1.0 INTRODUCTION 1
2.0 GROUND WATER INFLOWS, USE, AND DISCHARGE 4
3.0 GROUND WATER AND SURFACE WATER MONTTORING RESULTS 7
3.1 Ground Water Monitoring Results 7
3.1.1 Mine Area
3.1.2 Loadout Area
3.2 Monitoring Well Inspections 9
3.3 Surface Water Monitoring Results 22
3.3.1 Mine Area
3.3.2 Loadout Area
LIST OF TABLES
Table No. Title Page No.
1 Mine Water Inflow Data Summary (from 2001 AHR) 4
2 Water Balance, Water Use and Consumptive Use Summary 5
3 NPDES Dischazges Summary (2001) 6
4 Monitoring Wells -Groundwater Levels (2000-2004) 10
5 MW-10 Water Quality Data 17
6 MW-16 Water Quality Data 18
7 MW-23 Water Quality Data 19
8 MW-65 Water Quality Data 20
8A MW-NW Water Quality Data 21
9 Streamflow Measurements (cfs) 25
10 Newlin Creek (Upstream) Water Quality Data 26
11 Newlin Creek (Downstream) Water Quality Data 27
12 Oak Creek (Upstream) Water Quality Data 28
13 Oak Creek (Downstream) Water Quality Data 29
14 Magpie Creek (Upstream) Water Quality Data 30
15 Magpie Creek (Downstream) Water Quality Data 31
16 Second Alkali Creek Water Quality Data 32
LIST OF FIGURES
FiQtrre No. Title Page No.
1 Mine Monitoring Locations 2
2 Loadout Monitoring Locations 3
3 Water Levels for Well MW-8 11
4 Water Levels for Well MW-10 12
5 Water Levels for Well MW-16 13
6 Water Levels for Well MW-23 14
7 Water Levels for Well MW-65 15
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