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<br /> <br />i <br /> <br />. <br /> <br />. <br /> <br />. - ,.;~' I ...: <br />~~u"'1>.J <br /> <br /> <br />A detailed study to determine the municipal and industrial <br />supplemental water requirements for all years was not made. This <br />would have required a daily operation study of the entire Colorado <br />River system above Cameo. However, such a detailed daily study was <br />made for the years 1934 and 1944. These daily studies were based on <br />assumptions of a 300 second-foot municipal and industrial consumptive <br />use requirement (year 2014) and that all existing decrees including <br />Denver's Blue River system were in full operation. The study also <br />assumed that the potential Parshall Unit, Eagle Divide Unit, West <br />Divide Unit, and Silt Project were in operation. <br /> <br />The analysis showed that the municipal and industrial water <br />requirement from Ruedi Reservoir to be 10,000 acre-feet in 1934 and <br />41,500 acre-feet in 1944. To estimate the requirements from Ruedi <br />for other years, the results obtained for 1934 and 1944 were plotted <br />against the undepleted flow of the Fryingpan River at Ruedi. <br />Exhibit 5 shows the relationship from which the annual demsnd for <br />municipal and industrial water from Ruedi Reservoir was obtained. <br /> <br />A summary of the reservoir operation study (August 1929- <br />July 1948) in terms of average annual quanti ties of water in acre- <br />feet follows for the 19-year period. <br /> <br />Although the average annual municipal and industrial water <br />release from Ruedi Reservoir is 34,600 acre-feet, examination of <br />individual years (May through April) in the study discloses that in <br />years of low stream flows such as 1931, 1934, and 1940, the required <br />releases would be 66,000, 10,000, and 61,000 acre-feet respectively, <br />all based upon 2014 requirements. Ruedi Reservoir, therefore, would <br />provide substantial water supplies from storage in those years of <br />low stream flows. <br /> <br />Average annual releases to avoid spills and additional <br />winter water represent undependable yields as they would not be <br />available in critical years. <br /> <br />With respect to releases for avoidance of spills, it was <br />assumed that by April 1 of each year a forecast of inflow and required <br />releases would be made for the ensuing spring and summer months. In <br />case any of the forece.ats indicated that spills would occur if only <br />releases for mandatory by-passes and municipal and industrial water <br />requirements were made, then additional releases would be made in such <br />a manner as to make the total reservoir outflow quite uniforlll and to <br />enhance the operation for flood control. Such releases to avoid <br />spills might enhance fish flows and be beneficial to power generation, <br />if any, and possibly for downstream irrigation use. <br /> <br />23 <br />