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<br />LAKE MEAD <br />(COLORADO RIVER) <br /> <br />Water Year 1993 <br /> <br />At the beginn;ng of water year 1993, Lake Mead, impounded <br />by Hoover Dam, had a water surface elevation of 357.9 <br />meters (1174.4 feet) and an active storage of 23,953 million <br />cubic meters (19,419,000 acre-feet). During the winter <br />months, the water level continued to rise and by the end of <br />December the water surface elevation was 358.7 meters <br />(1176.9 feet) with an active storage of 24,335 million cubic <br />meters (19,729,000 acre-feet). Beginning in December 1992, <br />Pacific storms brought unusual high amounts of precipitation <br />to the Lower Basin causing water orders below Davis and <br />Parker dams to cut back. Releases were cut back in <br />amounts equal to water use and also to keep the flow to <br />Mexico as low as possible. Lake Mead continued to rise <br />through the spring months and by the end of March 1993, <br />the water surface elevation was 363.8 meters (1193.5 feet) <br />with an active capacity of 27,114 million cubic meters <br />(21,981,000 acre-feet). Then Lake Mead elevation gradually <br />declined to 362.2 meters (1188.3 feet) by the end of June <br />1993. During the period July through September, Lake <br />Mead rose, reaching an elevation of about 362.5 meters <br />(1189.2 feet) the end of the water year with a corresponding <br />active storage of 26,371 million cubic meters (21,379,000 <br />acre-feet). <br /> <br />ACTUAL RELEASES 11193 <br /> <br />III'UJOII cu..: III!I1!M <br /> <br />-........... <br />1". <br /> <br />100 <br />100 <br />'00 / " ./ <br /> '\. <br />100 / "- <br /> '\ <br />.... '\. / <br /> <br />1111 <br /> <br />172 <br /> <br />711 <br /> <br />- <br /> <br />.... <br /> <br />)- F <P'; ~."..,. ~? 1''' ,,0 <br /> <br /> <br />During the water year, releases were made to meet <br />downstream water use requirements in the United States and <br />Mexico, programmed levels of Lake Mohave and Havasu, <br />and net transit losses which include river and reservoir <br />evaporation, uses by phreatophytes, changes in bank storage, <br />unmeasured inflows, and diversions to the Las Vegas, <br />Nevada area via the Robert B. Griffith Water Project <br />(project). The total release from Lake Mead through <br />Hoover Dam during the water year 1993 was approximately <br />8,649 million cubic meters (7,012,000 acre-feet). All of the <br />amount passed through the turbines for power production. <br />In addition 402 million cubic meters (325,800 acre-feet) were <br />diverted from Lake Mead by the Project. At the end of the <br />water year, Lake Mead had a water surface elevation of <br />362.5 meters (1189.2 feet) and an active of 26,371 million <br />cubic meters (21,379,000 acre-feet) which reflects an increase <br />in storage during the water year of 2,418 million cubic <br />meters (1,960,000 acre-feet). On September 30, 1993, the <br />active storage of Lake Mead was 3,150 million cubic meters <br />(2,554,000 acre-feet) greater than the active storage in Lake <br />Powell. <br /> <br />LAKE MI!AD <br /> <br />Reservoir <br /> <br />Storage Capacity <br />Nannal poor Elewfion <br />Minimum Power Pool <br />Surface Area, full <br />Re&Cl'V'Otr Length, full <br /> <br />33,769 million cubic meters (27,371,000 acre-feet) <br />374.6 MeIer> (1229.0 Peel) <br />330.1 Meter> (1083.0 Pee') <br />65,843 H<<tares (t62,1OO Acres) <br />t8S Kilometer> (115 Miles) <br /> <br />Powemlant <br /> <br />Number of Units <br />Total Capacity <br /> <br />17 <br />1,964,500 JeW <br /> <br />15 <br />