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TABLE OF CONTENTS <br />4.21.1 Scope ................................................................................................................................... 4.21-1 <br />4.21.2 General Responsibility of Persons Conducting Coal Exploration ...................................... 4.21-1 <br />4.21.3 Required Documents ........................................................................................................... 4.21-1 <br />4.21.4 Performance Standards ....................................................................................................... 4.21-1 <br />4.21.5 Requirements for a Permit .................................................................................................. 4.21-2 <br />4.22 CONCURRENT SURFACE AND UNDERGROUND MINING ................................................................. 4.22-1 <br />4.23 AUGUR AND HIGHWALL MINING .................................................................................................. 4.23-1 <br />4.23.1 Scope ................................................................................................................................... 4.23-1 <br />4.23.3 Performance Standards ....................................................................................................... 4.23-1 <br />4.23.4 Maximize Recoverability of Mineral Reserves .................................................................... 4.23-1 <br />4.23.5 Undisturbed Areas of Coal Shall Be Left in Unmined Sections .......................................... 4.23-2 <br />4.23.6 Abandoned or Active Underground Mine Workings ........................................................... 4.23-2 <br />4.23.7 Surface Mining Activities and Highwall Mining ................................................................. 4.23-2 <br />4.23.8 Prevent Pollution of Surface and Groundwater and to Reduce Fire Hazards .................... 4.23-2 <br />4.23.9 Division shall prohibit Auger (Highwall Mining) Mining ................................................... 4.23-2 <br />4.23.10 Backfill and Grading Requirements ................................................................................... 4.23-3 <br />4.23.11 Highwall Shall be Eliminated ............................................................................................. 4.23-3 <br />4.24 OPERATIONS IN ALLUVIAL VALLEY FLOORS ................................................................................ 4.24-1 <br />4.25 OPERATIONS ON PRIME FARMLANDS ............................................................................................ 4.25-1 <br />4.26 MOUNTAINTOP REMOVAL ............................................................................................................ 4.26-1 <br />4.27 OPERATIONS ON STEEP SLOPES .................................................................................................... 4.27-1 <br />4.28 COAL PROCESSING PLANTS AND SUPPORT FACILITIES NOT LOCATED AT OR NEAR THE MINE SIT E OR NOT <br />WITHIN THE PERMIT AREA FOR THE MINE ................................................................................................. 4.28-1 <br />4.29 IN-SITU PROCESSING .................................................................................................................... 4.29-1 <br />4.30 CESSATION OF OPERATIONS ......................................................................................................... 4.30-1 <br />4.30.1 Temporary ........................................................................................................................... 4.30-1 <br />4.30.2 Permanent ........................................................................................................................... 4.30-1 <br />RULE 6 BLASTERS TRAINING AND CERTIFICATION .............................................................. .... 6-1 <br />Table of Contents iv Date Revised: 6/23/08 <br />Revision No: MR-91