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<br />OJ2370 <br /> <br />2005 DETERMINATIONS <br /> <br />The AOP provides guidance regarding reservoir storage and release conditions during the <br />upcoming year, based upon congressionally mandated and authorized storage, release, and delivery <br />criteria and determinations. After meeting these requirements, specific reservoir releases may be <br />modified within these requirements as forecasted inflows change in response to climatic variability <br />and to provide additional benefits coincident to the projects' multiple purposes. <br /> <br />Article 1(2) of the Operating Criteria allows for revision of this 2005 AOP to reflect the current <br />hydrologic conditions by June of2005. Any revision in the AOP would occur only after a <br />re-initiation of the AOP consultation process as required by law. <br /> <br />Upper Basin Reservoirs <br /> <br />The minimum objective release criterion will control the annual release from Glen Canyon Dam <br />during water year 2 005 in accordance with A rtic1e 11(2) 0 f t he 0 perating Criteria unless spill <br />avoidance and/or the storage equalization criteria in Article ll(3) is controlling. Under the most <br />probable, probable minimum, and probable maximum inflow scenario, Glen Canyon Dam will <br />release the minimum objective of8.23 maf(10,150 mcm). <br /> <br />Section 602(a) of the Colorado River Basin Project Act provides for the storage of Colorado River <br />water in Upper Basin reservoirs that the Secretary finds necessary to assure deliveries to comply with <br />Articles Ill(c), ID(d), and III(e) of the 1922 Colorado River Compact without impairment to the <br />annual consumptive use in the Upper Basin. The Operating Criteria provide that the annual plan of <br />operation shall include a determination ofthe quantity of water considered necessary to be in Upper <br />Basin storage at the end of the water year. Pursuant to Section 602(b), as amended, the Secretary is <br />required to make this determination after consultation with the Upper Colorado River Commission <br />and representatives from the three Lower Division States and after taking into consideration all <br />relevant factors including historic stream flows, the most critical period of record, the probabilities of <br />water supply, and estimated future depletions. Water not required to be so stored will be released <br />from Lake Powell: <br /> <br />. to the extent it can be reasonably applied in the States of the Lower Division to the uses <br />specified in Article III( e) ofthe 1922 Colorado River Compact, but these releases will not be <br />made when the active storage in Lake Powell is less than the active storage in Lake Mead; <br /> <br />. to maintain, as nearly as practicable, active storage in Lake Mead equal to the active storage <br />in Lake Powell; and <br /> <br />. to avoid anticipated spills from Lake Powell. <br /> <br />Taking into consideration all relevant factors required by Section 602(a)(3) of the Colorado River <br />Basin Project Act, the Operating Criteria, and the Interim 602(a) Storage Guideline, it is determined <br /> <br />23 <br />