PERMFILE129285

• Permit No: C1996083A
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: CMWB Final Design, WESTEC Report dated June 1996
• From: Through Appendix B
• Section_Exhibit Name: Coal Mine Waste Bank Section 1
• Media Type: D
• Archive: Yes

•
TABLE OF CONTENTS
SECTION
PAGE
1.0 INTRODUCTION ............................................. 1
2.0 SITE CONDITIONS ........................................... 2
2.1 SURFACE CONDITIONS .................................... 2
2.2 SUBSURFACE CONDITIONS ................................. 3
3.0 DESIGN PARAMETERS ........................................ 5
4.0 DESIGN ASPECTS ................................. .......... 6
4.1 CONSTRUCTION .............................. .......... 6
4.1.1 General ................................ .......... 6
4.1.2 Underdrain System ........................ .......... 7
4.1.3 Haul Roads ............................. .......... 8
4.1.4 Runoff Control Ditches ..................... ......... 10
4.1.5 Material Balance/Material Stockpiles ............ ......... 12
4.2 SEDIMENT POND .............................. ......... 13
4.2.1 Hydrology .............................. ......... 14
4.2.2 Sedimentology ...........................
4.2.3 Estimated Sediment Pond Volumes ........ 15
17
4.2.4 Sediment Pond Embankment ................. ......... 17
4.2.5 Sediment Pond Dewatering .................. ......... 18
4.2.6 Maintenance ............................ ......... 19
4.3 SLOPE STABILITY ............................. ......... 20
4.3.1 Groundwater Conditions .................... ......... 20
4.3.2 Material Properties ........................ ......... 20
4.3.3 Sediment Pond Slope Stability ................ ......... 22
4.3.4 Results ................................ ......... 22
5.0 RECLAMATION ................................... ......... 24
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6.0 USE OF THIS REPORT ........................................ 25
7.0 REFERENCES .............................................. 26
ADCQUACY-O1