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.' ( .' fully using its basic apportionment in 1993 as '''ell as in 1995. . E'ullysatisfying the Colorado River water needs of the Basin states means the amount of their apportionment that they would likely use for the period being considered plus the maximum amount that any state would realistically need in excess of its basic aooortionment. These consumotive use schedules, as well ai"alternative build-uo sche~ules for AriZOna's use of its basic apportionment, are for evaluation purposes only. Other operating rules for the GO-month stucles would remain the same as the 24-month studies in that the target objective would be. to have a ~ull Lake Powell. reservoir condition (22.6 million acre-feet) on January 1 of each year. As in the case of the 24-month studies, consideration on a year-to-year basis also would be given to deferring the September 30 storage equalization requirements of Lake Powell and Lake Mead until the end of the calendar year during years when the 3asin states' Colorado River '''ater needs were fully met. There is little oc no riSk to rese~voir storage under an operating plan decision to fully meet the needs of the Basin states for the operating plan year if reservoir system storage recovers during the 60-month period under a probable minimum water supply scenario, esoeciallv if reauired flood control releases in eKcess of c.o',./r\str:eam needs oucioq that oeriod exceed the increased water use orovided for bv the decision or if surplus deliveries are made to ~exico. Uncler such conditions, increased water use decisions should be on an un interruptible basis. In other cases, water supply decisions, including whet~e= ~ate= supply co~~it~ents a.re i~t.e::u?tible or uninterruptible",. si}oulo- consi"der, all relevant factors as provided foe in" the Operati"ng Criteria. By no later than October 1, the besinning of the ope:ating year, the Secretcry of the Inter ior '..;ould :elease the annual operating plan so that water a~d po~er operations can be appropriately scheduled and imple~e~~ed for the following year. A one or two page summary of the GO-month operational studies (suggested example format attached) would be prepared to suooort the decision orocess. Kev items deoicted on the 5-yea-( summary would include Lake" Powell January 1 and September 30 contents, Glen Canyon Qarn annual ~ater year releases, Lake ~\ead September 30 cont~nts, January 1 reservoir system vacant storage space, Hoov~r Dam flood concrol releases, lower Basin co~sumptive use, and annual .-5-