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<br />I <br />i, <br /> <br />Upper Basin to de~te the flow of the rivdltat Lee Ferry by <br /> <br />6,3 mat annually while delivering 7.5 maf annually to the Lower <br /> <br />Basin. On the basis ot this study the Interstate Stream Commission <br /> <br />staff estimates that under the terms of the compacts, New Mexico <br /> <br />may deplete the flow of the San Juan River system at sites of use <br /> <br />by 727,000 acre-feet annually. <br /> <br />The figure 727,000 may be computed as follows: (6,300,000 <br /> <br />- 50,000) x .1125 + 24,000 = 727,000. The figure 24,000 in this <br /> <br />equation may require explanation. The use of water at sites in <br /> <br />the Upper Basin results in a reduction in natural losses between <br /> <br />-- <br /> <br />the sites of use and Lee Ferry which is referred to as "salvage <br /> <br />by use" (Hopse €ommittee on Interior & Insular Affairs - Lower <br /> <br />Colorado River Basin Project, August-September 1965, Serial <br /> <br />~17, page 230). Beneficial consumptive use is measured as <br /> <br />depletion.at Lee Ferry and each Upper Basin state's consumption <br /> <br />at sites of use may exceed, by the amount of salvage by use, the <br /> <br />depletion of flow at Lee Ferry that the state is entitled to make. <br /> <br />New Mexico's share of such salvage by use is estimated at 24,000 <br /> <br />acre-feet . <br /> <br />Existing and Proposed Water Commitments <br /> <br />Table 2 presents a summary of water available from the <br /> <br />Upper Colorado River system for depletion at sites of use in <br /> <br />New Mexico and a summary of present and proposed depletions <br /> <br />of this water. Further discussion of some of the items of this <br /> <br />table may be helpful. <br /> <br />The table reflects a future depletion of 226,000 acre-feet <br /> <br />annually by the Navajo Indian Irrigation Project. This estimate <br /> <br />assumes that the entire project will be served by sprinkler <br /> <br />-13- <br />