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<br />, <br /> <br />,r <br />.''1'<<1 <br />."": <br /> <br />, . <br /> <br />ATTACl-\.M E NT B <br /> <br />_.~ <br />.,J <br />STATE OF COLORADO <br />o <br /> <br />'. . <br />, <br /> <br />eJ <br />--'.~ <br />.~ <br /> <br />Colorado Water Conservation Board <br /> <br />Department of Natural Resources. <br /> <br />721 State Centccoial Building <br />1313 Sherman Street <br />DeDver, COIDradO 80203 <br />pho,e (303) 866-344t <br />FAX (303) 866-4474 <br /> <br />Roy Romer <br />Govc:rnor <br /> <br />. November 22, 1994 <br /> <br />JiIlIles S. Lochhead <br />Excc:utive.Direcwr,DNR <br />Dari.. C. LUe, P.E. <br />Director, ewCB <br /> <br />'Ms. Carol DeAngelis <br />U.S. Bureau of Reclamation <br />Grand Junction Projects Offj.ce <br />P.O. Box 60340 . <br />. Grand Junction, Colorado 81506 <br /> <br />. Ref: Aspinall Unit Operation Matrix <br /> <br />. :c- <br />....l Dear Carol: <br />.j <br /> <br />. <br /> <br />. .~. . ~1 <br />, l <br />"':~.~e'" <br /> <br />The Colorado Water Conservation Board generally supports an operational philOSophy for the <br />AspinaIl Unit (formerly Curecanti Unit) which embraces the following concep~.The Board suggests <br />. ~e following order of priority for satisfying as many of these c.oncepts as possible. <br /> <br />1) 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 f60t 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.'minirnum'bypassflow 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 possibk to keep downstream water users whole, <br />particularly if releases .to maintain 300 cfs for endangered fish below Red1ands are made. In <br />1994, this required a Gwmison mainstemdraft of between 550 and oOOcfs atthe gage below <br />the Gwinison Iwmel. Pr~iding ~E.oug.!1.w!lte.r_ o.utof Crystal to keep mainstem senior water <br />rights from impacting upstream juilior$ should be the to'p priority in developing the annual <br />operating plan. . <br />