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<br />002334 <br /> <br />Table 3, Glen Canyon Dam Release Restrictions (Glen Canyon Dam O;Jerating Criteria) <br /> Parameter ( cfs ) (cms) Conditions <br />Maximum flow (6) 25,000 708.0 <br />Minimum flow 5,000 141.6 Nighttime <br /> 8,000 226.6 7:00 am to <br /> 7 :00 pm <br />Ramp rates <br />Ascending 4,000 113.3 per hour <br />Descending 1,500 42.5 per hour <br />Daily fluctuations (7) 5,000/8,000 141.6 / 226,6 <br /> <br />Releases from Lake Powell in water year 2005 will continue to reflect consideration ofthe uses and <br />purposes identified in the authorizing legislation for Glen Canyon Dam. Powerplant releases and <br />BeachlHabitat Building Flows will reflect criteria based on the findings, conclusions, and <br />recommendations made in the ROD for the GCDFEIS pursuant to the Grand Canyon Protection Act <br />of 1992 and NEPA documentation regarding the April 24, 2002, AMWG experimental flow <br />proposal. <br /> <br />Lake Mead <br /> <br />For calendar year 2004, the Partial Domestic Surplus condition was the criterion governing the <br />operation of Lake Mead in accordance with Article III(3)(b) of the Operating Criteria, Article <br />ll(B)(2) ofthe Decree, and Section 2(B)(2) of the Interim Surplus Guidelines. A volume of 1.5 maf <br />(1,850 mcm) of water was scheduled for delivery to Mexico in accordance with Article 15 of the <br />1944 United States-Mexico Treaty and Minutes No. 242 and 310 of the International Boundary and <br />Water Commission. <br /> <br />Lake Mead began water year 2004 at elevation 1,142.12 feet (348 meters), with 15.6 maf <br />(19,243 mcm) in storage, 60 percent of the conservation capacity of 25,877 maf (31,919 mcm). <br />During the year, Lake Mead steadily declined and reached its minimum elevation of 1,125,73 feet <br /> <br />(6) May be exceeded during beach/habitat building flows, habitat maintenance flows, or when necessary to manage <br />above average hydrologic conditions. <br /> <br />(7) Daily fluctuations limit is 5,000 cfs (141.6 cms) for months with release volumes less than 0.600 maf(740 <br />mcm); 6,000 cfs (169.9 ems) for montWy release volumes of 0.600 to 0.800 maf (740 to 987 mcm); and 8,000 cfs <br />(226.6 cms) for monthly volumes over 0.800 maf (990 mcm). <br /> <br />17 <br />