2008-03-21_PERMIT FILE - C1980007A ‎(47)‎

• Permit No: C1980007A
• IBM Index Class Name: Permit File
• Doc Date: 3/21/2008
• Doc Name: Hydrologic Characterization PR12 & South of the Division Areas & Monitoring Plan
• Section_Exhibit Name: Exhibit 71
• Media Type: D
• Archive: Yes

PR-12 Exhibit 71
EXHIBIT 71
HYDROLOGIC CHARACTERIZATION
PR-12 AND SOUTH OF THE DIVIDE AREAS
AND MONITORING PLAN
MOUNTAIN COAL COMPANY, LLC
WEST ELK MINE
TABLE OF CONTENTS
- - -1.0- SUMMARY ................. ..._......._....................................................................................................................... 1
2.0 SURFACE WATER HYDROLOGY ..................................................................................................... 2
2.1 Streams ............................................................................
2.1.1 Dry Fork .............................................................
2.1.1.1 Deer Creek .............................................
2.1.1.2 Poison Gulch ..........................................
2.1.2 Lick Creek ..........................................................
2.1.3 Deep Creek .........................................................
2.1.4 South Prong Creek ............................................
2.2 Stock Ponds, Springs, and Seeps ...................................
................................................ 2
................................................ 2
................................................ 4
................................................ 4
................................................ 4
................................................ 4
................................................ 5
................................................ 5
3.0 GROUND WATER HYDROLOGY ...................................................................................................... 8
3.1 Shallow Sediments .............................................................................................................. 12
3.2 Bedrock ............................................................................................................................... 12
3.2.1 B-Seam ................................................................................................................... 12
3.2.2 E-Seam .
3.2.3 Strata Above the E-Seam ..................................................................................... 13
3.2.4 F-Seam ....................................................................................................................13
3.2.5 Barren Member above F-Seam ............................................................................ 13
4.0 COMPREHENSIVE HYDROLOGIC MONITORING PLAN ........................................................ 14
4.1 Summary ............................................................................................................................. 14
4.2 Hydrologic Monitoring Plan ............................................................................................. 14
4.3 Surface Water Monitoring ................................................................................................ 16
4.3.1 Upper North Fork Drainage Basin Surface Water Monitoring Stations ........ 19
4.3.1.1 Deep Creek ................................................................................................. 19
4.3.1.2 Box Canyon ............................................................................................... 19
4.3.1.3 North Fork Upper ....................................................................................... 19
4.3.1.4 Sylvester Gulch .......................................................................................... 19
4.3.1.5 Raven Gulch ............................................................................................... 20
4.3.2 Lower North Fork Drainage Basin Surface Water Monitoring Stations........ 20
4.3.2.1 North Fork Lower ...................................................................................... 20
4.3.2.2 Lower Gribble Gulch ................................................................................. 20
4.3.3 Minnesota Creek Drainage Basin Surface Water Monitoring Stations .......... 20
4.3.3.1 Lick Creek Flume ...................................................................................... 20
4.3.3.2 Dry Fork ..................................................................................................... 20
4.3.3.3 Deer Creek ................................................................................................. 21
4.3.3.4 Poison Gulch .............................................................................................. 21
September 2007 HpdroGeo, Inc.
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