Laserfiche WebLink
<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 />less than the 8.29 cfs direct flow right. In order for the present set of <br />water rights to provide a safe yield, the City's system must be supplemented <br />with storage water. <br /> <br />The quantity of water which needed to be supplied for drought protection by <br />the new storage was determi ned by compari ng the avail abl e water supply to <br />existing diversion capacities and future demands. A water supply of only 4.15 <br />cfs (50% of the 8.29 cfs rightl was assumed divertible for a period of 120 <br />days from June through September in the extreme dry year. Average monthly <br />water delivery demands were increased by 30 percent to reflect drought <br />conditions. The difference between the demand and supply needs to be provided <br />at the water supply intake by releases from new storage. <br /> <br />For the 120-day period of maximum daily demands during the summer, about 3300 <br />acre-feet is needed in dry years to meet future water requirements. Only 1000 <br />acre-feet can be expected from use of the Deep Cut Ditch direct flow right. <br />Therefore, new storage should supply about 2300 acre-feet as a safe yield to <br />meet the future needs of the Ci ty. Then the Ci ty water supply system woul d be <br />capable of supporting about 35,000 people. <br /> <br />4.3 New Service Area Supply <br />The second analysis was made by assuming that the existing Craig water supply <br />system and water rights were sufficient for the maximum population reached in <br />the early 1980' s. New storage would be operated to supply a theoretical new <br />municipal area directly from releases from the reservoir. The typical montl11y <br />denand pattern was used and various new reservoir storage capacities were <br />selected to examine how much new yield could be supplied. <br /> <br />Elkhead Lake, in its present configuration, contains about 13,700 acre-feet of <br />storage capacity belonging to Colorado-Ute and the Colorado Division of <br />Wildlife (DOWl. Colorado-Ute is expected to use their water only during <br />drought conditions. The reservoir operations presented in this report assume <br />releases from Colorado-Ute storage of 2,000 acre-feet in 1954 and 1961; 4,000 <br />acre-feet in 1965 and 1970; and 8,000 acre-feet in 1977. This release pattern <br />is assumed to be typical of future operating conditions. The drought in 1977 <br /> <br />- 27 - <br />