2008-03-21_PERMIT FILE - C1980007A

• Permit No: C1980007A
• IBM Index Class Name: Permit File
• Doc Date: 3/21/2008
• Section_Exhibit Name: Master Table of Contents
• Media Type: D
• Archive: Yes

West Elk Mine
0 Contents (Continued)
Coal Seams and Related Strata ...........................................2.04-22
B-Seam ................................................................................... 2.04-22
E-Seam ................................................................................2.04-27
F-Seam ................................................................................2.04-32
Structural Geology ................................................................................ 2.04-33
Geologic Surface Features .................................................................... 2.04-34
Prominent Fracture Zones .................................................. 2.04-34
Weathering and Burn .......................................................... 2.04-36
Effects of Slopes ....................................................................2.04-36
Steep Topography ................................................................. 2.04-36
Geologic Hazards and Slope Stability ................................................. 2.04-37
Landslides .............................................................................. 2.04-38
Deep Landslides ....................................................................2.04-38
Shallow Colluvial Slides .......................................................2.04-42
Debris Avalanches ................................................................. 2.04-42
Debris Flows .......................................................................... 2.04-42
Potentially Unstable Slopes .................................................. 2.04-43
Rockfall .................................................................................. 2.04-43
Seismic Effects ...................................................................... 2.04-44
Ground Subsidence .............................................................. 2.04-44
• Other Geologic Factors that May Affect Mining Conditions ........... 2.04-44
Groundwater ......................................................................... 2.04-44
Sandstone Channel Deposits ................................................ 2.04-48
Rolls ....................................................................................... 2.04-48
Rock Spars ............................................................................ 2.04-48
Seam Discontinuities ............................................................ 2.04-48
Soft Shales ............................................................................. 2.04-49
Methane ................................................................................. 2.04-49
2.04.7 Hydrology Description ................................................................. 2.04-51
2.04.7(1) Groundwater Information .................................................... 2.04-51
Regional Groundwater Conditions ..................................... 2.04-53
Site Hydrogeology ................................................................. 2.04-58
Baseline Monitoring Program .............................................2.04-59
2.04.7 (2) Surface Water Information .................................................2.04-78
Surface Water Resources ..................................................... 2.04-78
Baseline Monitoring Program .............................................2.04-83
Spring :\4011itoring ................................................................ 2.04-87
Surface Water Quantity .................................... :.................. 2.04-92
Streams ................................................................................2.04-92
Surface Water Quality ....................................................... 2.04-105
2.04.7(3) Alternative Water Supply Information ............................. 2.04-114

iiiRev. Alarch 2006; Rev. Apri! 2006 PRIG; Rev. Alcn, 2006 PRIO Sep 2007 PR12Feb, 2008 PR12