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3 . Operation description 21 <br /> a. Surface disturbance areas 21 <br /> b . Extent of underground workings 22 <br /> (1) Dutch Creek No . 1 Mine 22 <br /> (2) Dutch Creek No . 2 Mine 23 <br /> (3) L . S . Wood Mine (No . 3) 24 <br /> (4) Bear Creek Mine (No . 4) 24 <br /> (5) Coal Basin Mine (No . 5) 24 <br /> C . Rock tunnel project <br /> (1) Introduction 28 <br /> (2) Project description 29 <br /> (3) Environmental considerations 31 <br /> (4) Water control structures 33 <br /> (5) Rock spoil disposal area 34 <br /> (6) Mitigation of environmental impacts 35 <br /> 4 . Mine facilities <br /> a . Description of all buildings, structures <br /> and utility corridors 38 <br /> (1) General 38 <br /> (2) Preparation plant 38 <br /> (3) Explosives storage 42 <br /> (4) Methane gas pipeline 42 <br /> (5) Sewage treatment 43 <br /> (6) Water system 43 <br /> (7) Electrical transmission 43 <br /> (8) Communication facilities 44 <br /> (9) Support facilities 44 <br /> b . Existing structures for which there is <br /> CMLRB design criteria 45 <br /> C . Transportation system within the permit <br /> area <br /> (1) Introduction 45 <br /> (2) Haul roads 46 <br /> (3) Light use roads 50 <br /> (4) Conveyors 51 <br /> 5 . Ponds, impoundments and diversions 51 <br /> a. General hydrologic control plan 51 <br /> b . Sedimentation pond design criteria 52 <br /> C . Permanent impoundments design criteria 55 <br /> d . Diversion design criteria 55 <br /> 6 . Topsoil 57 <br /> 7 . Overburden 58 <br /> 8 . Coal handling 59 <br />