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<br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />0689 <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />separate calculations were made for water that would have <br />been obtained at Crooked Arroyo under the first priority <br />and for water that would have been obtained at Timpas Creek <br />under both priorities. For both locations the computation <br />procedure was: 1) reduce the historic diversions by 20 <br />percent to allow for canal losses; 2) prorate the di- <br />versions to obtain the State's portion; 3) calculate 80.5 <br />percent of the State's portion to obtain storable water at <br />the State headgate; and 4) deduct transit losses estimated <br />at 0.07 percent per mile. Water from the supplemental sources <br />would have been delivered at the Crooked Arroyo headgate. The <br />water storable at John Martin Reservoir (Table 9) would have <br />averaged 4,704 acre-feet annually (2.01 acre-feet per acre) and <br />ranged from 6,616 acre-feet to 2,086 acre-feet. <br /> <br />The percentage of water obtained at the State headgates that <br />is storable at John Martin can be varied to provide the proper <br />amount of return flow (Figure 3) each month. One way to <br />accomplish this would be to store more water during the winter <br />months and less during the irrigation season. The Southeastern <br />Colorado Water Conservancy District's winter storage program <br />offers some potential for regulating winter water correspond- <br />ing to return flows. <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />-28- <br />