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<br />Glen Cangon Danl
<br />Lake Powell
<br />
<br />Lake Powell was operated during water year
<br />1974 as part of the Colorado River Storage Project
<br />in accordance with governing compacts and laws
<br />to provide optimum power production,
<br />recreational opportunities, and fish and wildlife
<br />benefits.
<br />
<br />
<br />STATISTICS
<br />
<br />On Septem ber 30, 1973, Lake Powell water
<br />surface elevation was at 3,646 feet with an active
<br />storage of \7,284,000 acre-feet. During the fall and
<br />winter months, the reservoir remained fairly
<br />constant. Releases were scheduled in the early
<br />spring to integrate surplus hydroelectric power
<br />from the Northwest with CRSP power production.
<br />The April-July 1974 runoff above the gage at
<br />Lees Ferry, Arizona, undepleted by Colorado
<br />River Storage Project reservoirs, was 7.1 million
<br />acre-feet or 85 percent of the 1906-68 average.
<br />Although the snowmelt runoff was below average,
<br />an all-time high water elevation occurred on
<br />June 30, 1974, when the reservoir contained
<br />20,103,000 acre-feet of active storage at elevation
<br />3,667 feet. This was about 21 feet higher than the
<br />former all-time high that occurred in 1973.
<br />
<br />RESERVOIR
<br />MAXIMUM STORAGE
<br />RATED HEAD
<br />MINIMUM POWER
<br />SURf:ACE AREA (FULLl
<br />RESERVOIR lENGTH lFUlL)
<br />POWER Pl..ANT
<br />NUMBER OF UNITS 8
<br />TOTAL CAPACITY OF UNITS 900,000 KILOWATTS
<br />'does Aot include 1,998,000 acre feer of dead srorig(!) below 3370 f~r
<br />
<br />ACTIVE STORAGE.
<br />{ACRE. FEET)
<br />25.002,000
<br />9.42!l.OOO
<br />4,126.000
<br />161.390ACRES
<br />186MIlES
<br />
<br />ELEVATION (F-EETJ
<br />3700
<br />3570
<br />3490
<br />
<br />OUTFLOW
<br />
<br />20
<br />
<br />
<br />UPPER aUARTllE
<br />
<br />10
<br />
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<br />Water Yeil' 1974
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<br />. Waler Year 1975 .
<br />
<br />::1
<br />
<br />12
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