2018-01-03_PERMIT FILE - C1994082 ‎(12)‎

• Permit No: C1994082
• IBM Index Class Name: Permit File
• Doc Date: 1/3/2018
• Section_Exhibit Name: Tab 20 Backfilling and Grading
• Media Type: D
• Archive: No

TAB 20
TABLE OF CONTENTS
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
Non -recovered Coal and Parting Material Volume
Premining Overburden Volume
Total Pit Spoil Volume
Volume Calculations (Postmining Topography)
Pre and Postmine Slopes
Postmining Drainage Channels
Disturbance Area
References Cited
Figure No.
20-1
Table No.
20-1
20-3
Attachment No.
20-1
20-2
LIST OF FIGURES
Postmining Topography Typical Mass Balance
LIST OF TABLES
Postmining Landform Mass Balance
Pre- and Postmine Drainage Channel Summary
LIST OF ATTACHMENTS
Page
1
3
3
3
6
6
6
6
6
6
6
7
7
8
12
13
Page
5
Page
4
11
Permanent Structures and Features
Summary Report Identifying Unstable Areas Within Yoast Disturbance Area
TR -37 i Revised 01/08