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<br />. W.lIl.rYelr 1974 _
<br />
<br />Navajo Reservoir
<br />
<br />
<br />Chart ,
<br />
<br />STATISTICS
<br />
<br />ACTIVE STORAGE. -
<br />fACRE-.FEETJ elEVATION (FEET)
<br />1.696,400 60B5
<br />660,500 5990
<br />15.610ACRES
<br />J3MllE'S
<br />
<br />RESERVOIR
<br />MAXIMUM STORAGE
<br />INACTIVE STORAGE
<br />SURFACE AREA (FULlf
<br />AESERVOIR LENGTH (FULL)
<br />
<br />'do~s nor include 12,600 acre f~ror dedd storilgtJ below eleviltion 5715 f~r
<br />
<br />OUTFLOW
<br />
<br />~I
<br />
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<br />u
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<br />w
<br />~- 1
<br />~ 0
<br />
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<br />1:1
<br />:1
<br />
<br />During water year 1973 Navajo Reservoir
<br />was kept within the limits specified by the
<br />Bureau of Reclamation in its interim opera-
<br />tion rules. The reservoir was lowered to
<br />elevation 6,018 feet during the winter of
<br />1972 and spring of 1973. During the early
<br />part of the spring runoff storage was accumu-
<br />lated as rapidly as possible with releases for
<br />downstream uses of 500 c. f.s. The actual
<br />April-July inflow to Navajo Reservoir was
<br />1,363,000 acre-feet or 163 percent of the
<br />long-time April-July runoff average above
<br />Navajo. The high runoff caused the reservoir
<br />to reach an all-time high elevation of 6,087
<br />feet, 2 feet above nonnal maximum water sur-
<br />face elevation, with an active storage of
<br />1,730,000 acre-feet. Maximum releases from
<br />the reservoir were about 5,440 c.f.s. during
<br />the runoff season.
<br />Navajo Reservoir is operated under a fonnal
<br />flood control plan. On March I, 1973, Nava-
<br />i 0 Reservoi r had 891,000 acre-feet of storage.
<br />The April-July inflow forecast on March I was
<br />830,000 acre-feet. The current flood control
<br />diagram allowed the reservoir to be full with
<br />an active storage of 1,696,400 acre-feet dur-
<br />ing the entire 1973 snowmelt runoff season for
<br />
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<br />W~ler Year 1973
<br />
<br />10
<br />
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