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<br />Lower Basin Reservoirs
<br />
<br />Hoover Dam
<br />Lake Mead
<br />!
<br />
<br />
<br />Chart 7
<br />
<br />STATISTICS
<br />ACTIVE STORAGE"
<br />(ACRE-FEET) ELEVATION (FE En
<br />27,377.000 1:(29
<br />13,653.000 1123
<br />10,024,000 '083
<br />162,700 ACRE5
<br />115MII-ES
<br />
<br />RESERVOIR
<br />MAXIMUM STORA.GE
<br />RATED HEAD
<br />MINIMUM POWER POOL
<br />SURFACE AREA (FULU
<br />RESERVOIR LENGTH (FULL!
<br />POWER PLANT
<br />NUMBER OF UNITS 17
<br />TOTAL CAPACll)' OF UM1S 1,344,800 K1LDWAlTS
<br />"(foes not Include 2.3J8JJOOacre.fet!r of d~ild stor~ below fl/eviltion 895 tf!l!t
<br />
<br />OUTFLOW
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<br />
<br />lake Mead at the beginning of woter yeor
<br />1973 had a water surface level of 1,158 feet and
<br />an active storage of 17,451,000 acre-feet. Dur-
<br />ing the water year releases were made to meet
<br />downstream water use requirements in the United
<br />States and Mexico, programmed levels of lake
<br />Mohave and Havasu, and transit losses which in-
<br />clude river and reservoir evaporation, uses by
<br />phreatophytes, changes in bank storage, unmea-
<br />sured inflows and diversions, etc. The total re-
<br />lease from loke Mead through Hoover Dam was
<br />7,937,000 acre-feet. At the end of the water
<br />year, lake Mead had a water surface elevation
<br />of 1,\80 feet and an active storage of 20,176,000
<br />acre-feet, which reflects an increase in storage
<br />during the water year of 2,725,000 acre-feet.
<br />On September 30, 1973, the active storage of
<br />lake Mead was 2,892,000 acre-feet greater
<br />than the acti ve storage in Lake Powell.
<br />lake Mead is the only reservoir on the Colo-
<br />rado River in which a specified space is exclu-
<br />sively al/ocated far mainstream flood contr..Ql.
<br />Flood control regulations have been published.
<br />These regulations take into account effective
<br />space in CRSP reservoirs as well as in lake Mead.
<br />S?oce in lake Mead and CRSP reservoirs dur-
<br />ing water year /973 was such that no unusual
<br />Hoover releases were required to operate pursuant
<br />to provisions of the flood control regulations.
<br />(Chart 7)
<br />
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<br />LOWER QUA.RTlLE
<br />
<br />MOST .G.OVERSE
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<br /> WattrYur \973 'Ifalllr'fur 1~1"
<br /> 14
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