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TAB 20 <br />• <br />TABLE OF CONTENTS <br /> Paae <br />Backfilling and Grading Procedures ~ <br />Post Mining Topography 3 <br />General 3 <br />Volume Calculations (Pre-mining Topography) 3 <br />Pre-mining Material Volume 6 <br />Virgin Overburden Material Volume 6 <br />Total In-Place Coal Volume 6 <br />Recoverable Coal Volume 5 <br />Non-recovered Coal and Parting Material Volume 6 <br />Pre-mining Overburden Volume 6 <br />Total Pil Spoil Volume 5 <br />Volume Calculations (Post Mining Topography) 7 <br />Pre- and Post Mine Slopes 7 <br />Post Mining Drainage Channels S <br />Disturbance Area ~~ <br />References Cited t2 <br />LIST OF FIGURES <br />Foci ure No. Pa9? <br />20-1 Post Mining Topography Typical Mass Balance 5 <br />LIST OF TABLES <br />Tahle No Paae <br />20-1 Post Mining Landform Mass Balance 4 <br />20-2 Pre- and Post Mining Drainage Channel Summary 9 <br />Revised 2/99 <br />