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<br />Table 3. Glen Canyon Dam Release Restrictions (Glen Canyon Dam 0 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.S 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 continut: to reflect consideration ofthe uses and <br />purposes identified in the authorizing legislation for Glen Canyon Dam. Powerplant releases and <br />Beach/Habitat Building F'lows 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) ofthe 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 />W"ater Commission. <br /> <br />Lake Mead began water year 2004 at elevation 1,142.12 ft~et (348 meters), with 15.6 mar <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 reachedl its minimum elevation of 1,125.73 feet <br /> <br />(6) May be exceeded during beach/habitatbuilding flows, habitat maintenance flows, or when necessary to manage <br />above average hydrologkconditions-r <br /> <br />(7) Daily fluctuations limit is 5,000 cfs (141.6 ems) for months with release volumes less than 0.600 maf (740 <br />mcm); 6,000 cfs (169.9 ems) for monthly release volumes of 0.600 to 0.800 maf(740 to 987 mem); and 8,000 efs <br />(226.6 ems) for monthly volumes over 0.800 maf (990 mcm). <br /> <br />17 <br />