PERMFILE44181

• Permit No: C1982057A
• IBM Index Class Name: Permit File
• Doc Date: 6/16/2006
• Section_Exhibit Name: Tab 20 Backfilling and Grading
• Media Type: D
• Archive: Yes

TAB 20
TABLE OF CONTENTS
Disturbed Area
Backfilling and Grading Procedures
Postmining Topography
General
Volume Calculations (Premining Topography)
Premining Material Volume
Virgin Overburden Material Volume
Total In-Place Coal Volume
Recoverable Coal Volume
Premining Overburden Volume
Total Pit Spoil Volume
Volume Calculations (Postmining Topography)
Postmining Drainage Channels
References Cited
LIST OF FIGURES
Figure No.
20-1 Postmining Topography Typical Mass Balance
LIST OF TABLES
Table No.
20-1 Postmining Landform Mass Balance (North Area)
20-1A Postmining Material Mass Balance - II-W South Area
20-2 Postmine Drainage Channel Summary
LIST OF ATTACHMENTS

Attachment No. Description
20-A Pit Backfill Stability Report
20-1 Postmining Drainage Channel Design
20-2 Landowner Requests for Permanent Features (Reserved)
PR-05
Pace
1
2
5
5
6
6
6
6
6
6
10
10
11
14
Paae
8
Paae
6
7
12
Revised 01/06