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<br />000875 <br /> <br />Lake Powell will be operated as follows: <br /> <br />8) Lake Powell will follow a forecast driven, spring runoff operation (January through <br />July) that attempts to fill Lake Powell to a July target storage (23.822 maf or 500 kaf of <br />space) and a fall operation (August through December) that attempts to draw down the <br />reservoir to a December target storage (21.900 maf or 2.422 kaf of space). Lake <br />Powell's spring and fall operational release is constrained in each month to be within a <br />minimum and maximum range. The range is set to 390 kafper month and 1500 kafper <br />month respectively, reflecting the current limits on release rates of 6500 cfs and 25000 <br />c~. - <br />- - <br />- - <br />9) Lake Powell's operation will satisfy a minimum objecti~~e to the Lower Basin of <br />8.23 maf over each water year (October through S~bt;if.U' those releases do not <br />result in Powell's elevation being below 3370 fee!;(to'ji;,of de~l). At times when <br />Lake Powell does not have enough water to meekthe-mllhnum objective release, a mass <br />balance will be used to determine how muwwater i~ released (~pl~ water in <br />storage above dead pool minus losses). ~- ...::.... -- <br />- - - <br />- - - <br />- - - - <br />- - -- - <br />10) Lake Powell will make equalization releases (il'E~ess of the ~um objective <br />release) if the end-of-water-year '@.WY) content iii$ake Powell is forecasted to be <br />greater than Lake Mead's EOWY~and the 602(~r&ge criterion is met. The <br />602(a) storage value will be comp\!~~cumented~the SIA-FEIS, with the <br />addition that no equalization will occiii1.for tbi ~aQP leFand including 2016 if Lake <br />Powell is projected t~elow 14.85 ii.~levati0iiS630 feet) on September 30, per <br />the Final Enviro~W:~sment Ado~n of an Ifiierim 602(a) Storage Guideline. <br /> <br />11) Beach/Habitat"nW~~IO~HBF) are ~red as documented in the SIA-FEIS. <br /> <br />Note: Thes~~~ns are:~~J;1tical fb-1h~sed in the SIA-FEIS and the Colorado River <br />Interim ~lus CIi~inal E'titiIonmental Impact Statement (ISG-FEIS), as documented <br />in VW~~ n, Attachmt;Ii~~ipfthe~::FEIS, with the following exceptions: <br />- ~,i:3:Z. In those slq@!es, thg:.iirinimum objective release was maintained if those <br />-<';T:releases di~t result in Lake Powell's elevation being below 3490 feet <br />...~um JiiWer pool). However, when the minimum objective release <br />r~ inJ?ike Powell going below minimum power pool of elevation 3490 <br />feet; .~lMSes from Lake Powell were adjusted in order to protect the <br />minitymn power pool. <br />. The interim 602(a) storage criterion involving Lake Powell's elevation of <br />3630 feet was not used in those studies. <br /> <br />Lake Mead will be operated as follows: <br /> <br />12) Lake Mead will operate to meet downstream demand, except when additional releases <br />are necessary to meet the Corps of Engineers flood control procedures. <br /> <br />Draft: Subject to Change <br /> <br />2 <br /> <br />Last Revision: May 13, 2004 <br />