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<br />. t-. , Ill' <br /> <br />diverted by the project for use in New Mexico shall be.a part of the consumptive use <br />apportionment made to the State of New Mexico by Article ID(a) of the Upper Colorado <br />River Basin Compact. The maximum amount of c01nsumptive use through the project by <br />the Navajo Nation in New Mexico that would be permitted in anyone yc-..ar under the <br />Settlement Agreement and the proposed contract is 20,780 acre-feet. <br /> <br />Public Law 87-483 at section II(a) requires that n() long-term contract, except contracts <br />for the NIIP and the San Juan-Chama Project, shall be entered into for the delivery of <br />water stored in Navajo Reservoir, or any other waters of the San Juan River and its <br />tributaries to which the United States is entitled, until the Secretary of the Interior has <br />determined by hydrologic investigation that sufficient water to fulfill such contract is <br />reasonably likely to be available for use in the State of New Mexico under the allocations <br />made in Articles ill and XN of the Upper Colorado River Basin Compact, has submitted <br />such determination to Congress, and Congress has approved the contract. The last such <br />hydrologic determination was approved by thle Secretary on February 2, 1989 <br />(Hydrologic Determination, 1988, Water Availabillity from Navajo Reservoir and the <br />Upper Colorado River Basin for Use in New Mexico, hereinaftt."I' referred to as the 1988 <br />Hydrologic Determination). The 1988 Hydrologic Determination evaluated the <br />availability of water from the Navajo Reservoir. water supply for the Jicarilla Apache <br />Nation's Navajo Reservoir water supply contract. The State of New Mexico by letter <br />dated May 3, 2005, requested that the 1988 Hydrologic Determination be updated to <br />evaluate the availability of water to service the proposed Navajo-Gallup Water Supply <br />Project. <br /> <br />This hydrologic investigation is made for the purpose of contracting for water from the <br />Navajo Reservoir water supply for the Navajo Nation's uses in New Mexico under the <br />Navajo-Gallup Water Supply Project. The Bureau of Reclamation prepared the <br />hydrologic investigation in consultation with the Upper Colorado River Commission <br />because of the critical nature of this determination of the Upper Basin water supply. The <br />Upper Colorado River Basin Compact. created and defines several areas of responsibility <br />for the Commission that directly and indirectly relate to this investigation. <br /> <br />ID. Upuer Basin Yield <br /> <br />A. General Upoer Basin HvdrologY <br /> <br />Based on the Bureau of Reclamation's Colorado River Simulation System (CRSS) <br />natural flows for the period 1906-2000, the natural runofIfrom the Upper Colorado River <br />Basin averages about 15.3 maf per year at Lee Ferry. Of this amount, approximately 2 <br />maf per year originates in the San Juan River Basin above Bluff, Utah. New Mexico can <br />only develop its Upper Basin allocation from the San Juan River and its tributaries. The <br />Bureau of Reclamation's Colorado River System Consumptive Uses and I..asses Report <br />for 1996-2000 indicates that current consumptive uses from the San Juan River Basin <br />average about 382,400 af per year in New Mexico and about 192,500 af per year in <br /> <br />2 <br />