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<br />8 <br /> <br /> <br />t"'. .''0 (' ,', <br />.JUv.~ <br /> <br />. <br /> <br />Development and operation of the project as shown in this <br /> <br />study would provide an additionaJ. effective crop irrigation water <br />supply averaging 6,760 acre-feet annuaJ.ly or about one-third of <br />an acre-foot of water to each acre of irrigated crops in the <br /> <br />project area. This improvement would increase the average effec- <br /> <br />tive headgate irrigation supply from 61 percent of ideaJ. require- <br />ments to 83 percent or the crop supply from 74 percent of consump- <br /> <br />tive use requirements to 89 percent. In the 33-year period, 1925- <br /> <br />1957, irrigation shortages would have been practicaJ.ly eliminated <br /> <br />in 13 years and reduced in the remaining 20 years. <br /> <br />Exhibit 2 graphically illustrates irrigation water require- <br /> <br />ments as compared to historic and "with project" water supply for <br /> <br />. <br /> <br />each year of the study period of the Trinidad Project. <br /> <br />A comparison can aJ.so be made of headgate irrigation water <br /> <br />shortages both with and without the Trinidad Project by reference <br /> <br />to table 1. <br /> <br />Operation of the Trinidad Reservoir for irrigation in accord- <br />ance with stated operating conditions would not deplete the water <br /> <br />supply presently available for water users downstream from the <br /> <br />project area and woUl.d not interfere with the, utilization of the <br /> <br />consezwation capacity of the John Martin Reservoir. Estimates of <br /> <br />depletions or accretions'1mmediately below the project area were <br /> <br />prepared by compll-rison of diversion, storage and return. flow data <br /> <br />with and without the Trinidad Project. The "without" project <br /> <br />operation included both a historic condition and a modified historic <br /> <br />. <br /> <br />condition. Modified historic included historic conditions plus <br />