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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />The Cactus Park reservoir with a storage capacity of 15,000 acre- <br />feet (for 90 percent firmness) and an inactive storage of 5,000 <br />acre-feet. <br /> <br />The Surface Creek feeder canal as described for Alternative <br />No.!. <br /> <br />The Cedaredge canal as described for Alternative No.!. <br /> <br />An enlarged Leroux Creek feeder canal with a capacity of 80 cfs <br />used to convey water supplies obtained from Leroux Creek and <br />the Overland Ditch system to Cactus Park reservoir over a length <br />of 5.3 miles. <br /> <br />An enlarged Overland Ditch to carry water in excess to the <br />existing operation over approximately 22 miles. The enlargement <br />was limited to a maximum additional capacity of 1;0 cfs due to <br />location constraints. <br /> <br />D. <br /> <br />Operational Considerations <br /> <br />1. Canal Capacity Limits <br /> <br />Sensitivity analyses were conducted to determine the relationships between <br />reservoir volume, irrigation firmness and conveyance structure capacity. <br />Part of the analysis dealt with the examination of the irrigation demand and <br />the storage volume required. Part of the analyses dealt with the examination <br />of flow duration curves for the surplus water available from the sources: <br />Tongue Creek, Leroux Creek and Overland Ditch. Assuming a uniform water <br />supply and based on monthly demand volumes required not being exceeded 10 <br />percent of the time, the maximum capacities of the conveyance system to be <br />used in the operation studies should be 5,700, 4,000 and 5,800 acre-feet per <br />month for Tongue Creek, Leroux Creek and Overland Ditch, respectively. <br />These numbers correspond to approximately 95, 67 and 97 cfs, respectively. <br /> <br />V-7 <br />