PERMFILE134330

• Permit No: C1994082A
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: TAB 20 BACKFILLING AND GRADING
• Media Type: D
• Archive: Yes

TAB 20
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TABLE OF CONTENTS
Page
Backfilling and Grading Procedures 1
Post Mining Topography 3
General 3
Volume Calculations IPre-mining Topography) 3
Pre-mining Material Volume 6
Virgin Overburden Material Volume 6
Total In-Place Coal Volume 6
Recoverable Coal Volume 6
Non-recovered Coal and Parting Material Volume 6
Pre-mining Overburden Volume 6
Total Pit Spoil Volume 6
Volume Calculations (Post Mining Topography) 7
Pre- and Post Mine Slopes 7
Post Mining Drainage Channels 8
• Disturbance Area 11
References Cited 12
LIST OF FIGURES
Figure No. Page
20-1 Post Mining Topography Typical Mass Balance 5
LIST OF TABLES
Table No Page
20-1 Post Mining Landform Mass Balance 4
20-2 Pre- and Post Mining Drainage Channel Summary 9
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i Revised 2/99