2018-03-20_PERMIT FILE - C1981019A (4)

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4.04 SUPPORT FACILITIES................................................................................................. 3 4.05 HYDROLOGIC BALANCE.......................................................................................... 3 4.05.1 General Requirements.................................................................................................. 3 4.05.3 Diversions and Conveyance of a Watershed Less than One Square Mile ................... 5 4.05.4 Stream Channel Diversions (Relocation of Streams) .................................................. 5 4.05.5 Sediment Control Measures......................................................................................... 6 4.05.6 Sedimentation Ponds.................................................................................................... 6 4.05.7 Discharge Structures.................................................................................................... 8 4.05.8 Acid-forming and Toxic -Forming Spoil...................................................................... 8 4.05.9 Post -Mining Impoundments........................................................................................ 8 4.05.10 Underground Mine Entry and Access Discharges..................................................... 10 4.05.11 Groundwater Protection............................................................................................. 10 4.05.12 Protection of Groundwater Recharge Capacity......................................................... 10 4.05.13 Surface and Groundwater Monitoring....................................................................... 10 4.05.14 — 4.05.18 Various Topics........................................................................................................... 13 4.06 TOPSOIL...................................................................................................................... 13 4.07 SEALING OF DRILLED HOLES AND UNDERGROUND OPENINGS ................. 13 4.08 USE OF EXPLOSIVES................................................................................................ 13 4.08.2 Pre -Blast Survey........................................................................................................ 13 4.09 DISPOSAL OF EXCESS SPOIL.................................................................................. 13 4.10-4.12 DISPOSAL OF EXCESS SPOIL.................................................................................. 16 4.13 CONTEMPORANEOUS RECLAMATION................................................................ 16 4.14 BACKFILLING AND GRADING............................................................................... 16 4.14.1 General Requirements................................................................................................ 16 4.14.2 General Grading Requirements.................................................................................. 17 4.14.3 Covering Coal and Acid and Toxic Forming Materials ............................................. 17 4.14.4 Thin Overburden........................................................................................................ 17 4.14.5 Thick Overburden...................................................................................................... 17 4.14.6 Re -grading or Stabilizing Rills and Gullies............................................................... 17 4.15 REVEGETATION REQUIREMENTS........................................................................ 17 4.15.1 — 4.15.7 Revegetation Requirements, Various......................................................................... 17 4.15.8 Revegetation Success Criteria.................................................................................... 17 4.15.9 Cropland Revegetation Success................................................................................. 18 4.15.10 Previously Mined Land Revegetation Success Criteria ............................................. 18 4.16 POSTMINING LAND USE......................................................................................... 18 4.16.1 General....................................................................................................................... 18 4.16.2 Determining Use of Land........................................................................................... 18 4.16.3 Alternative Land Uses............................................................................................... 18 4.17 AIR RESOURCES PROTECTION.............................................................................. 18 4.18 PROTECTION OF FISH, WILDLIFE, AND RELATED VALUES ........................... 18 4.19 PROTECTION OF UNDERGROUND MINING........................................................ 19 4.20 SUBSIDENCE CONTROL.......................................................................................... 19 4.21 COAL EXPLORATION............................................................................................... 19 4.22 CONCURRENT SURFACE AND UNDERGROUND MINING ............................... 19 4.23 AUGER AND HIGHWALL MINING......................................................................... 20 4.23.1 Scope.......................................................................................................................... 20 4.23.2 Maximize Recoverability of Mineral Reserves......................................................... 20 4.23.2(2) Abandoned or Active Underground Mine Workings................................................................. 20 4.23.2(3) Surface Mining Activities and Highwall Mining....................................................................... 20 4.23.2(4) Prevent Pollution of Surface and Groundwater and to Reduce Fire Hazards ........................... 21 4.23.2(6) Division Shall Prohibit Auger (Highwall Mining) Mining........................................................ 21 South Taylor/Lower Wilson - iii Revision Date: 10/31/13 Revision No.: MR -129