PERMFILE109484

• Permit No: C1996083A
• IBM Index Class Name: Permit File
• Doc Date: 9/11/2006
• Doc Name: CMWB Final Design, WESTEC Report, June 1996
• Section_Exhibit Name: Coal Mine Waste Bank Section 1
• Media Type: D
• Archive: Yes

•
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VOLUMEIV
TABLE OF CONTENTS
SECTION PAGE
1.0 INTRODUCTION ........................................................................................... 1
2.0 SITE CONDITIONS ....................................................................................... 2
2.1 SURFACE CONDITIONS ...................................................................... 2
2.2 SUBUSRFACE 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 Stockpile ......................................... 12
4.2 SEDIMENT POND ........................................................ ................13-13i*
4.2.1 Hydrology ......................................................... ......:................14
4.2.2 Sedimentology .................................................. .......................15
4.2.3 Estimated Sediment Pond Volumes ................. ....................... 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
6.0 USE OF THIS REPORT .............................................................................. 25
7.0 REFERENCES ............................................................................................26
Volume. The PHC for Pond D is located in Volume Ill, pages Exh. 8-17 through 19, the SED~
output is now located in Volume lll, pages 207 & 208. The upland runoff areas are shown on
Map 20 in Volume ll.
TR-43
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