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<br />LOWER BASIN RESERVOIRS
<br />
<br />LAKE MEAD
<br />(COLORADO RIVER)
<br />
<br />
<br />WalerYear 1988
<br />
<br />At the beginning of water year 1988, Lake Mead, impounded
<br />by Hoover Dam, had a water surface elevation of 1,210 feet
<br />and an active storage of, 24,360,000 acre-feet. During the
<br />winter months, the' water level gradually rose to about
<br />1,212 feet near the end of February 1988 and then gradually
<br />declined to '1206 by the end of May 1988. During June, July,
<br />and August, Lake Mead continued to drop~ reaching a low
<br />elevation of approximately 1199 feet during the last week of
<br />September with a' correspnnding ac'tive storage of
<br />22,792,000 acre-feet. '
<br />
<br />During the water year, releases were made to meet
<br />downstream water use requirements in the United States and
<br />t-.1exico, flood control requirements, programmed levels of
<br />Lakes Mohave and Havasu, and transit losses which include
<br />
<br />ACTUAL RELEASES
<br />
<br />WY 1988
<br />
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<br />NDJ FMAMJ JA'SO
<br />
<br />river and reservoir evaporation, uses by phreatophytes,
<br />changes in bank storage, unmeasured inflows, and diversions
<br />to the Las Vegas, Nevada, area via the Robert B. Griffith
<br />Water Project (Project). The total release from Lake Mead
<br />through Hoover Dam ,during water year 1988 was
<br />approximately 9,688,000 acre-feet, all of which passed through
<br />the turbines for power production, In addition, 199,000
<br />acre-feet were diverted from Lake Mead by the Projec!. At
<br />the end of the water year, Lake Mead had a water surface
<br />elevation of 1199 feet and an active storage of 22,795,000
<br />acre-feet which reUects a decrease in storage during the water
<br />year of 1,570,000 acre-feet. On September 30, 1988, the active
<br />storage of Lake Mead was 42,000 acre-feet greater than the
<br />active storage in Lake Powell.
<br />
<br />LAKE MEAD
<br />
<br />Reservoir
<br />
<br />Acre- feet
<br />
<br />Elevation, feet
<br />
<br />Maximum Storage
<br />Rated Head
<br />Minimum Power
<br />Surface Area, full
<br />Reservoir,Length, full
<br />
<br />27,377,000
<br />13,653,000
<br />10,024,000
<br />
<br />1,229
<br />1,123
<br />1,083
<br />162,700 Acres
<br />1'15 Miles
<br />
<br />Powerplant
<br />
<br />Number of Units
<br />Total Capacity
<br />
<br />17
<br />1,619,000 KW
<br />
<br />15
<br />
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