PERMFILE131841

• Permit No: C1982057A
• IBM Index Class Name: Permit File
• Doc Date: 11/17/2004
• Section_Exhibit Name: Tab 20 Backfilling and Grading
• Media Type: D
• Archive: Yes

• TAB 20
TABLE OF CONTENTS
Pape
Backfilling and Grading Procedures 7
Postmining Topography q
General q
Volume Calculations (Premining Topography) q
Premining Material Volume q
Virgin Overburden Material Volume q
Total In-Place Coal Volume q
Recoverable Coal Volume 4
Non-recovered Coal and Parting Material Volume 5
Premining Overburden Volume 5
To[al Pi[ Spoil Volume 5
Volume Calculations (Postmining Topography) g
Postmining Drainage Channels 1p
• Disturbance Area 11
References Cited 1q
LIST OF FIGURES
Figure No. page
20-1 Postmining Topography Typical Mass Balance 8
LIST OF TABLES
Table No. page
20-1 Postmining Landform Mass Balance 5
20-tA Postmining Material Mass Balance 7
20-2 Premining and Postmining Drainage Summary 12
u
i Revised 9/98