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IJ J - j't should be expanded to more fully address the sub- basin's water supply needs. 31. Plan elements aimed at reducing upstream flood- ing problems will, if implemented, adequately resolve the near-term needs in this subbasin. Fundamental to this end, specitied watershed studies should be con- ducted by the Soil Conservation Service, followed by implementation 01 proper measues to better control tributary drainages. 29. Needs for comprehensive planning in the Eastern Dakotas Subbasin will be met by proposed plan ele- ments. A Commission subregional analysis of the James River Basin is scheduled to begin late in FY 1977. This study should be coordinated closely with results of the Bureau of Reclamation's construction plans for the Garrison and Oahe units and with other completed and ongoing study efforts---especially the Corps of Engineers' Eastern South Dakota Water Supply Study and the water planning programs of the States of North Dakota and South Dakota. A second Commission subregional analysis, for the Missouri- Big Sioux, is scheduled to begin in 1980. Complex water and related land problems, particularly in the areas of water quality, municipal supply, fish and wildlife, and rural flooding, necessitate the timely conduct of this comprehensive planning effort, in order to coordinate plans and attain early, effective implementation. 32. Downstream and urban flooding in the Platte- Niobrara subbasin remain a problem, dictating the im- plementation of local flood control programs in Denver, Colorado; North Platte and Grand Island. Ne- braska; and other areas, and completion of the Corps of Engineers' ongoing review report of the Platte River and tributaries. Flood plain management programs need to be established in many communities. 33. Satisfaction of near-term subbasin needs for in- creased irrigated acreage would be m9t through im- plementation of the plan elements. Essential to meet- ing this functional need is the conduct of identified watershed project studies which address irrigation as a purpose, and irrigation and multiple-purpose studies by the Bureau of Reclamation, Economic Develop- ment Administration and the Colorado Water Conser- vation Board. Further, the satisfaction of irrigation ob- jectives is dependent on completion of a number of ongoing projects including the North Loup Division, the O'Neill and Narrows Units, the LaPrele Dam Re- habilitation, and the rehabilitation and betterment of many older projects. PLATTE-NIOBRARA SUBBASIN 30. The Platte River Basin in Nebraska was the sub- ject of a recently completed Commission-led Level B Study. All the recommendations made in that study report have been adopted by the Commission as ele- ments of its comprehensive, coordinated joint plan. Those elements, most of which are included in the list- ing in Chapter 10, are integral elements of the plan for the subbasin. ..w , , -- -- ~~--~ ---;- - - ol:O.:'-~ -= _ '" ~- - -- .. .... Lake McConaughy, Nebraska 11