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<br />Lower Basin Reservoirs
<br />Lake Mead (Colorado River)
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<br />Tourists in lIckellme at Hoover Dam.
<br />
<br />Water Year 198t
<br />At the beginning of water year 1981, Lake
<br />Mead, impounded by Hoover Dam, had a
<br />water surface elevation of 1,205 feet and an
<br />active storage of 23,637,000 acre-feet. During
<br />the water year, releases were made to meet
<br />doonstream water use requirements in the
<br />United States and Mexico, programmed levels
<br />of Lakes Mohave and Havasu, and transit
<br />losses which include river and reservoir
<br />evaporation, uses by phreatophytes, changes
<br />in bank storage, unmeasured inflows, and
<br />diversions. (As mentioned earlier in this report,
<br />additional anticipatory releases, totaling
<br />approximately 1.177.000 acre-feet. were
<br />made from Hoover Dam and downstream
<br />reservoirs during water year 1981 in order to
<br />decrease the magnitude of potential flood
<br />control releases during 1981 and 1982,)
<br />
<br />The total release from Lake Mead through
<br />Hoover Dam during water year 1981 was an
<br />estimated 9.825,000 acre-feet. At the end of
<br />the water year. Lake Mead had a water
<br />surface elevation of 1 ,193 feet and an active
<br />storage of 21 ,870.000 acre-feet, whicn reflect
<br />a decrease in storage during the water year of
<br />1,767.000 acre-feet. On September 30.
<br />1981, the active storage ot Lake Mead was
<br />1,119,000 acre-feet more than the aclive
<br />storage in Lake Powell.
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<br />
<br />Water Year 1982
<br />During the 1982water year, the Lake Mead
<br />water level is scheduled to rise to elevation
<br />1,204 feel at the end of February 1982, then
<br />draw down to a low elevation of 1,194 feet at
<br />the end of June 1982, At that level the lake will
<br />have an average active storage of about 22.1
<br />million acre-feet. During water year 1982, a
<br />total of about 7,5 million acre-feet is
<br />scheduled to be released from Lake Mead, All
<br />releases are scheduled to pass through the
<br />turbines for electric power production.
<br />
<br />Lake Mead Active Storage>
<br />Reservoir (Acre-Feet)
<br />
<br />Maximum Storage
<br />Rated Head
<br />Minimum Power
<br />Surface Area (Full)
<br />Reservoir Length
<br />(Full)
<br />Power Plant
<br />
<br />Number of Units
<br />Total Capacity
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<br />Chart 6
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<br />EL
<br />(Ft.)
<br />
<br />27,377,000 1229
<br />13,653,000 1123
<br />10,024,000 1083
<br />162,700 Acres
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<br />115 Miles
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<br />"does not Include 2,378,000 acre-leel 01 dead
<br />storage below 895 teet
<br />
<br />17
<br />1,344,800 Kilowatts
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<br />6
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