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1. See charts, supra. 2. Assumes that most new Lower Basin development will rely on mainstem supplies, that depletions on the Lower Basin tri- butaries will not increase significantly and that the flows in these tributaries will not drop much below their 1971-1975 average level of 1.13 MAF/yr. 1971-1975 flow data for Lower Basin tributaries from "Consumptive Uses and Losses Report". 3. All 1975 consumptive use levels from "Consumptive Uses and Losses Report". Decease in evaporation by 2000 attri- buted to assumed drawndown in Lower Basin reservoirs. 4. "Draft 13(a) Assessment", Tables 3.1, 4.2, and 5.3 (attached as Appendix 1). Year 2000 synfuels water consump- tion assumes synfuels industry with 1.3 MBD of oil shale pro- duction and 2,035 MSCFD of coal gasification. Exxon, however, has projected full development of the oil shale resource in 2020 at 8 MBD. d. The Need for Basin-wide Water Management The study of non-importation augmentation schemes authorized by the 1968 Act culminated in the publica- tion of the "Westwide Study Report on Critical Water Problems Facing the Eleven Western States" in 1975. This study suggests another, yet still difficult, approach to the Colorado River's basin-wide deficit: innovative basin-wide water management and planning to "stretch" the River's unaugmented flows, and permit greater levels of development in both Upper and Lower Basins. This approach is expressed in the Westwide Study's following first three recommen- dations. ~ . ~ RECOMMENDATIONS 1. The total water management concept for the entire Colorado River Basin should continue to be broadened and perfected. 2. Accelerate programs of assistance to water users to bring about the adoption of water management methods and practices to improve the efficiency of water use. ~ .. ~" 3. In conjunction with the States and other interested parties, a wide range of future water demand schedules should be projected to be matched...with varied -20-