REP10617

• Permit No: C1980007
• IBM Index Class Name: Report
• Doc Date: 12/11/2001
• Doc Name: 1994 AHR text
• Annual Report Year: 1994
• Permit Index Doc Type: HYDROLOGY REPORT
• Media Type: D
• Archive: No

Doc Date:12/11/2001 III IIIIIIIIIIIII III
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TABLE OF CONTENTS

EXECUTIV E SUMMARY ..................................... . 1
1.0 HYDROLOGIC MONITORING ACTIVITIES ....................... . 3
1.1 INTRODUCTION .................................. . 3
1.2 SURFACE WATER MONITORING ...................... . 3
1.3 SPRING WATER MONITORING ........................ . 4
1.4 GROUNDWATER MONITORING ....................... . 7
1.5 MINE WATER MONITORING ......................... . 7
1.5.1 North Fork Water ............................. . 7
1.5.2 Sanitary Waste Water ........................... . 13
1.5.3 Groundwater Inflows ............................ . 13
1.5.4 Mining Activity ............................... . 13
~F„Seam .................................. .13
1.5.5 Mining Activity ............................... . 13
..B„Seam .................................. .13
1.6 WATER BALANCE ................................ .15
1.7 MINE WATER QUALITY ............................ . 15
1.8 RUNOFF FROM DISTURBED AREAS .................... . 17
1.9 REFUSE PILE WATER QUALITY ....................... . 17
• 2.0 HYDROLOGIC DATA INTERPRETATION AND IMPACT ASSESSMENT FOR
THE PERMIT AND ADJACENT AREAS ....................... . 18
2.1 ASSESSMENT OF MINE WATER ...................... . 18
2.2 ASSESSMENT OF SPRINGS ........................... . 19
2.3 ASSESSMENT OF GROUNDWATER ..................... . 19
2.3.1 Alluvial Wells and the Lower Refuse Pile ............... . 19
2.3.2 Barren Member ............................... . 20
2.3.3 ..F„ Seam .................................. . 20
2.3.4 "E" Seam .................................. . 21
2.3.5 "B" Seam .................................. . 21
2.3.6 Rollins Sandstone .............................. . 21
2.4 ASSESSMENT OF SURFACE WATER ................... . 22
2.4.1 Comparison of Baseline Water Quality with Operational Data ... . 22
2.4.2 MB-2R Water Quality ........................... . 22
2.5 MINE WATER MANAGEMENT AND IMPACT ASSESSMENT .... . 24
2.5.1 North Fork Water ............................. . 24
2.5.2 Sanitary Waste Water ........................... . 24
2.5.3 Mine Water ................................. . 24
2.5.4 Runoff from Disturbed Area ....................... . 24
2.6 ADEQUACY OF MONITORING PROGRAM ................ . 25
FSeam ............................... .... .26

• BSeam .................................... .26
Water Quality ............................ .
... . 26
Adequacy .............................. . 26
2.7 CHANGES PROPOSED FOR WY 1995 .................... . 26