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<br />- <br />, <br /> <br />2.3 RESULTS OF WATER SUPPLY INVESTIGATIONS <br />A reservoir on Clear Creek would increase the basin's firm yield. An <br />increase in firm yield would result from the capture of additional flood flows <br />and also from enhanced water management that could be provided by a new <br />reservoir. The project water supply analyses can be summarized as follows: <br />1. A reservoir capacity of less than 240,000 af could maximize the firm <br />yield of any project scenario. <br />2. The low storage/yield ratios for those scenarios which include a South <br />Platte River Exchange indicate that the most dependable source which <br />could be developed is the South Platte River Exchange. The <br />availability and cost of replacement sources to enable the South Platte <br />River exchange have not yet been investigated. <br />3. The diversity of the various water sources combined in a scenario, <br />has produced firm yield synergy (that is, a combination in which the <br />whol e is greater than the sum of the parts). An exampl e of thi s <br />synergy is that the Basin Combined scenario has a greater firm yield <br />than the sum of the firm yields for the Basin Management and South <br />Platte River Exchange scenarios. <br />4. The water supply analysis has also indicated that a large project <br />reservoir could create a very high use efficiency of Clear Creek water <br />sources. On the average, maximum firm yield averages 80 percent of <br />the available project supply. <br /> <br />c <br /> <br />'I <br />, <br /> <br />" <br /> <br />~ <br /> <br />2-3 <br /> <br />r- <br />