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<br />. <br /> <br />f\.) <br />0) <br />~ varied from a low of about 4,111,000 acre-feet per year to a high of <br />~n <br />. 5,464,000 acre-feet per year. Not included in these figures is the <br /> <br />annual main stem reservoir evaporation, estimated by the USER to <br /> <br />average about 520,000 acre-feet per annum. These three projected <br /> <br />. possible future rates of depletion were not based on institutional <br />or physical limitations on water supply. <br />Projected consumptive use!! from the mainstream in the Lower <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />Basin by year 1990 was based upon the "Law of the River". The highest <br />use in 1990 was assumed to be 7,500,000 acre-feet. The low 1990 <br />estimate is only slightly less -- 7,461,000 acre-feet. <br />Estimates of both 1973 water use and projected future use <br />through the year 1990 for each of the seven states were furnished <br />by the Basin States. Since projected water development is subject <br />to many influences and uncertainties, a range of future water <br /> <br />depletion rates was used. These were identified as low, moderate, <br /> <br />and high. In all cases, the states' projections fall within the <br />range of projections used in the study. <br />Table 3 presents a summary of the projected water use in the <br />Colorado River Basin. Presented in Appendix G are data on 1973 base <br /> <br />conditions by specilfic categories of use. These categories are: <br />~ out-of-basin exports, in-basin agricultural use, in-basin coal develop- <br />ment which includes water for mining operations and cooling of coal- <br />fired electrical power stations and coal gasification, and in-basin <br />. oil shale and other in-basin uses which include miscellaneous <br /> <br />municipal and industrial use and fish and wildlife uses. <br /> <br />. 1/ Consumptive use as defined by the U. S. Supreme Court means diversions <br />- from the stream less such return flow therto as is available for <br />consumptive use in the United States or in satisfaction of the <br />Mexican Treaty obligation. <br /> <br />. <br /> <br />-26- <br />