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II-B-7 <br /> MINE PORTALS <br /> INDEX - MINE PORTALS <br /> COAL BASIN MINE SITE <br /> Permit Location Reference Pg <br /> No. 1 Portal <br /> Vol . 3 App. II-B-7 Design Report - Mines 1 & 2 - 17 <br /> Att. 1 Morrison Knudsen Co 12/26/79 <br /> Sediment Pond Design - Calculations 34 <br /> Second Pond - No. 1 Mine 60 <br /> Vol . 3 II-B App. 7 Sediment and Drainage Control - M <br /> Att. 1 Exh. 1 Mines 1 & 2 - Morrison Knudsen <br /> Vol . 3 II-B App. 7 Details of Sediment & Drainage M <br /> Att. 1 Exh. 2 Control Structures - Mines 1 & 2 - <br /> Morrison Knudsen <br /> Vol . 3 II-B App. 7 Details of Sediment & Drainage M <br /> Att. 1 Exh. 3 Control Structures - Mines 1 & 2 - <br /> Morrison Knudsen <br /> No. 2 Portal <br /> Vol . 3 App. II-B-7 Design Report - Mines 1 & 2 - 17 <br /> Att. 1 Morrison Knudsen Co 12/26/79 <br /> Sediment Pond Design Calculations 34 <br /> Design of Sedimentation Ponds and 68 <br /> Surface Water Diversion - No. 2 Mine <br /> Bin Pad <br /> Pond Sizing 71 <br /> Principal Spillways 75 <br /> Dewatering Devices 79 <br /> Emergency Spillways 82 <br /> Index - Portals iv Prepared 6/91 <br />