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<br />1 ,,w r'~ "') <br />"j t ,j <br /> <br />. <br /> <br />through December 31, 1994. The net evaporation or depletion for the 10 year review period <br /> <br />November 1,1984 through October 31, 1994 is 66.83 percent of the gross evaporation (25420 x <br /> <br />.6683) or 16988 acre feet. If this volume of water is considered a Project depletion and added to <br /> <br /> <br />the Trinidad gauge, then the flow at the Thatcher gauge ~ cent of the flow at the <br /> <br />'~ <br />Trinidad gauge compared t(i;.36 ~t for the 10 year period prior to Project operations. <br /> <br />- -----_..._._,_.__.__._._,----~---_._---_._------'--_.~~.~ <br />heref~;~:-depi~tionsi~ the Project area have not increased as a result of the P!ojec~j <br /> <br />Although the depletions as measured at Thatcher are actual depletions to downstream <br /> <br />Purgatoire River flows, they are not necessarily depletions to Arkansas River flows due to water <br /> <br />exchanges between Trinidad Reservoir and the Las Animas gauge on the Arkansas River ~ <br /> <br />upstream of the John Martin Dam and ReservoiL A tot~E:2825~ feet of water has been ~~ <br /> <br /> <br />exchanged into Trinidad Reservoir from May of 1980 through October 31, 1994 an~89--;;:~ <br /> <br /> <br />. feet of that amount was exchanged during th<:.Jll-y.ear review period November 1, 1984 through <br /> <br />October 31, 1994. If the exchange amount of8489 acre feet during this 10 year review period <br /> <br />was added to both the Trinidad gauge and the Thatcher gauge to reflect the Project effects to the <br /> <br />Arkansas River at John Martin Reservoir, the volume of flows at the Thatcher gauge would have <br /> <br />beer@percent of the flow at the Trinidad gauge ~ompared to~per cent for the 10 year ~ <br /> <br />period prior to the Project <br /> <br />The content of Trinidad Reservoir was 2~200 acre feet on November I, 1984, the <br /> <br />beginning of the 10-year review period, and 11,203 acre feet on October 31, 1994 at the end of <br /> <br />the 10 year review period. Therefore, 13997 acre feet of water stored in previous years was <br /> <br />carried over and released in the review period. This water had been stored in years of surplus <br /> <br />water when the flows at Thatcher gauge exceeded flows at the Trinidad gauge and John Martin <br /> <br />. <br /> <br />23 <br /> <br />~ <br />o~ <br />~ <br />'\^~ <br />ou-e-- <br />l '\) vyv' <br />