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APPENDIX B Energy Content of Coal Flows in the United States in 1975, by Region and Process (x10 12 Btu)a Extractionb TransEortation Under- Unit Utilization Region ground Surf ace Auger Preparation Train Barge Truck Utilities Coke Liquefaction Gasification Northern 2,000 2,000 200 4,000 1,000 700 900 2,000 700 1;000 70 Appalachia ( 4, 000) (2,000) (200) Central 3,000 900 700 4,000 700 500 200 700 100 0 20 Appalachia (5,000) (10,000) (800) Central 1,000 2,000 600 4,000 1,000 500 300 1,000 300 10,000 100 (2,000) (3,000) (700) Northwest Southwest 0 (0) 10 (30) 500 (1,000) 100 (200) 0 (0) 0 (0) 500 200 400 10 0 0 0 0 100 100 0 0 500 0 1,000 800 . .... 11.) asources: Appendix A and Hittman Associates, Inc. (1977). bFor extraction, values are Btu's mined. Coal magnitude inputs for extraction are obtained by dividing outputs by extrac- tion efficiencies and are shown in parentheses. Extraction efficiencies given by Hittman Associates (1977) are as follows: Underground Surface Auger Northern Appalachia 0.57 0.81 NA, assume same as surface Central Appalachia NA, assume same as Northern Appalachia 0.81 NA, assume same as surface Central NA, assume same as Northern Appalachia 0.81 NA, assume same as surface Northwest - 0.98 Southwest NA, assume same as Northern Appalachia 0.79
