The report presents analyses of potential impacts on six Missouri River Main Stem reservoirs of alternative levels of coal development in the Upper Missouri Basin. Categories analyzed are: (1) Flood control; (2) potentials of meeting irrigation demands on Missouri Main Stem; (3) the adequacy of water to meet coal development needs; (4) ability to meet water quality control needs; (5) ability to meet downstream water supply needs; (6) impact on navigation; (7) impact on hydroelectric power generation; (8) impact on fishery resources; and (9) recreation and environmental impact. It indicates that there is sufficient water to provide for coal development; the navigation season may have to be shortened and that there would be a reduction in hydroelectric power generation depending on the amounts of water used for coal development.