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<br />0019J9 <br /> <br />Water Supply <br /> <br />The discussion to this point supports that New Mexico's <br />~..~ <br /> <br />entitlement is sufficient for beneficial consumptive uses <br /> <br />totaling 727,000 acre-feet annually at sites of use but does <br /> <br />not address the question of physical shortages in the supply <br /> <br />, , <br />required to make these depletions. The Secretary's 1963 <br /> <br />determination of water supply available for industrial contracts <br /> <br />in New Mexico estimated shortages for the Navajo Indian Irri- <br /> <br />gation Project, the Hammond Project and the municipal and indus- <br /> <br />trial contracts averaging 2% in the 38 years of the study period <br /> <br />used, with shortages reaching as high as 40% in drouth periods <br /> <br />such as occurred in the mid-1950's. Since his determination for <br /> <br />the 1968 contracts, the Secretary' of the Interior has' acquired <br /> <br />rights to tributary inflows below Navajo Reservoir that may <br /> <br />be used to supply a part of the water needed to fulfill the <br /> <br />municipal and industrial contracts., ~1ore recent water supply <br /> <br />studies, taking into ac,count such use of tributary inflm'1s, <br /> <br />show that the Navajo Irrigation Project, the Hammond Project, <br /> <br />and the municipal and industrial contracts can be served without <br /> <br />shortages even with recurrence of the most severe drouth period <br /> <br />of record. Further assurance against physical shortages is <br /> <br />gained from the recent revision of the plan of development for <br /> <br />the Navajo Irrigation Project which reduced the annual diversion <br /> <br />requirement from 508,000 acre-feet annually to 330,000 acre-feet. <br /> <br />-20- <br />