REP47787

• Permit No: C1980007
• IBM Index Class Name: Report
• Doc Date: 9/13/2002
• Doc Name: 2001 AHR, Intro Thru Appendix D
• From: Mountain Coal Company
• To: DMG
• Annual Report Year: 2001
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

Wes[ Elk Mine 2001 Annual Hydrology Report i
WEST ELK MINE
2001 ANNUAL HYDROLOGY REPORT
MOUNTAIN COAL COMPANY, LLC
TABLE OF CONTENTS
1.0 INTRODUCTION ............................................................................................................................... 1
1.1 'Overview of Mining Operations ........................................................................................ 1
2.0 HYDROLOGIC SUMMARY OF 2001 WATER YEAR ..................................................................... 1
2.1 Climatological Data .......................................................................................................... 1
2.2 Stream Flow Data ............................................................................................................. 4
3.0 HYDROLOGIC MONITORING .........................................
............ 6
• 3.1 Surface Water Monitoring ....................................................................................... ......... 6
3.2 Spring and Seep Monitoring .................................................................................... ......... 7
3.3 Ground Water Monitoring ....................................................................................... ......... 9
3.4 Underdrain and Mine Water Monitoring ................................................................... ...... 12
3.5 U.S. Forest Service Resources .................................................................................. ...... 12
3.6 Monitoring Methods ................................................................................................. ...... 13
4.0 MINE WATER MANAGEMENT ACTIVITIES ......................................................................... ...... 14
4.1 North Fork Water Rights ........................................................................................... ...... 16
4.2 Sanitazy Wastewater ................................................................................................. ...... 16
4.3 Sedimentation Ponds ............................................................................................... ....... 20
4.3.1 Ponds MB-1 and MB-2R .............................................................................. ...... 20
4.3.2 Ponds MB-3, MB-4, and MB-5 .................................................................... ...... 21
4.3.3 Pond FW-1 .................................................................................................. ....... 21
4.3.4 RPE Pond ................................................................................................... ....... 21
Projut # 00301 HydroGeo, Inc.