REP08870

• Permit No: C1981022
• IBM Index Class Name: Report
• Doc Date: 11/1/1996
• Doc Name: COAL MINE WASTE BANK DESIGN FOR THE SANBORN CREEK MINE
• Permit Index Doc Type: Waste Pile/Fill Report
• Media Type: D
• Archive: No

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 Sediment Pond Access Road .......................... 10
4.1 .5 Runoff Control Ditches .............................. 10
4.1.6 Material Balance .................................. 12
4.2 SEDIMENT POND ...................................... 13
4.2.1 Hydrology ....................................... 13
• 4.2.2 Sediment Yield ............................... • ... 14
4.2.3 Estimated Sediment Pond Volumes 16
4.2.4 Sediment Pond Wall ................................ 16
4.2.5 Sediment Pond Dewatering ........................... 17
4.2.6 Maintenance ..................................... 18
4,3 SLOPE STABILITY ...................................... 19
4.3.1 Groundwater Conditions ............................. 19
4.3.2 Material Properties ................................. 19
4.3.3 Results ......................................... 21
5.0 RECLAMATION ............................................ 22

6.0 USE OF THIS REPORT ....................................... 23
7.0 REFERENCES ............................................. 24
95256/1424.RPT Coel Mine Weate Bank Deeipn for the Sanborn Creek Mine
October 1996 WESTEC, Inc.