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<br />,.. <br />"'J. '.: <br /> <br />-:;' <br /> <br />-.~) <br /> <br />-;:~} <br />STATE OF COLORADO. <br /> <br />.0 <br /> <br />'. <br /> <br />Colorado Water Conservation Board <br /> <br />Deparunent of Natural Resources <br /> <br />721 s..... CeolellDial Building <br />1313 Sbemwl S_ <br />o.a-. Cola....... S0203 <br />Pboae (303) 866.3441 <br />FAX (303) 8664474 <br /> <br />November 22, 1994 <br /> <br />Roy RODler <br />00_ <br />l_ S. LochIlMd <br />Execali"" OitecIDr. DNR <br />0Iri.. C. LlIe. P.E. <br />0U0c:ult. CWCB <br /> <br />Ms. Carol DeAngelis . <br />U.S. Bureau of Reclamation <br />Grand Junction Projects Offlce <br />P.O. Box 60340 <br />. Grand Junction, Colorado 81506 <br /> <br />. Ref: Aspinall Unit Operation Matrix <br /> <br />..-., Dear Carol: <br />j <br /> <br />. <br /> <br />. . <br />.~ . ~; <br />'...:~ ~..:" <br /> <br />The Colorado Water Conservation Board generally supports an operational philoSQphy for the <br />Aspinall Unit (formerly Curecanti Unit) which embraces the following concepts. The Board suggests <br />the following order of priority for satisfying as many of these concepts as pOssible. <br /> <br />I) Releases should be coordinated in a manner which continues to provide the amount of water <br />that has historically been available to water users downstream of the Aspinall Unit. Historic <br />releases have usually been sufficient to keep downstream water users whole except in severe <br />dry years. The Aspinall Unit should not place a direct call for water under its water rights <br />in a manner which violates the spirit and intent of the 60,000 acre foot subordination described <br />in the 1959 Economic Justification Report for the Curecanti Unit of the Colorado River <br />Storage Project <br /> <br />Releases should also be such that the 300 cfs'minimum bypass flow for the Black Canyon <br />below the Gunnison Tunnel is satisfied. This bypass when added to the tributary inflowS will <br />generally satisfy downstream water rights except during drought years. During drought years <br />releases should be increased to the extent possible to keep downstream water users whole, <br />particularly if releases to maintain 300 cfs for endangered fish below Redlands are made. In <br />1994, this required a Gunnison maiDStem draft of between 550 and 600 cfs at the gage below <br />the Gunnison Tunnel. Pr<wding ~!!Oug!1.~teJ. OlJt of Crystal to keep maiDStem senior water <br />rights from impacting upstream juniors should be the top priority in developing the annual . <br />operating plan. <br />