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<br />"'''"~ <br />~'~~.l~.~ <br />AVERAGE "".4);.i~'\ <br />';;0'" " <br />"",.;;';';", <br />:ii~'R~J\. <br />,,~,j.~. S.:.i~::~ <br />/.,;&" ~. ".0 ~L~ <br />'1."1"'~'t.:~ <br />'~.$:~~,:~'\. ~"\ <br />lO"ER~QUARTllE 'Q:r~~,;,'~. <br />>;:~~ <br />~f'~ . <br />".__')~ ,4+, '\':',) <br />- - - - f.e.>;. ..' .. ';".'.'>;'\!''''...'. <br />MOST ADVERSE "'.'~ ,:','; _ :\{~~_"\_\ <br />me~"'""'. .,'..'",q\".~ <br />- - -~~ -~. ~-:,"'--""', -,"" <br />'-:~,.... ~--.'~"-: ,. ~."...,;'--+. <br />. , '. ">-,,---~. "~\' <br />- - ',---- -" - ~'\ <br />-" '~,<':\ " .,,\:, ---~~: <br />- - - - - - - -- --- "'~ - - - -::- ~ - ~L__~' ;-, - ,i" ~-"'--;;.---:..----- <br /> <br />~C-g~~~~i~i~g~o. <br />~ ~I ' . ~ *1 <br />. Water Year 1975 . <br /> <br />Navajo Reservoir <br /> <br /> <br />STATISTICS <br /> <br />ACTIVE STORAGE" <br />(ACRE.fEETI ELEVATION lFEETI <br />1,696.400 6085 <br />660,500 5990 <br />15,61QACRES <br />J3MILES <br /> <br />RESERVOIR <br />MAXIMUM STORAGE <br />INACTIVE STORAGE <br />SURFACE AREA [FULL) <br />RESERVOIR LENGTH (FULl) <br /> <br />"does nor include 12,600 acre feel of dead storage below elevarlon 5775 feer <br /> <br />OUTFLOW <br /> <br />[I <br /> <br />o <br />Z 4 <br />o <br />" <br />_~ 3 <br />>" <br />w 2 <br />w <br />~ <br />" <br />~ 0 <br />" <br />HI <br />:1 <br /> <br />During water year 1974 Navajo Reservoir was. <br />kept within the limits specified by the Bureau of <br />Reclamation in its interim operation rules. The <br />reservoir was lowered to eleva tion 6,027 feet <br />during the winter of 1973 and spring of 1974. The <br />actual April-July inflow to Navajo. Reservoir Was <br />271,000 acre-feet or 32 percent of the long-time <br />April-July runoff average above Navajo. <br /> <br />Navajo Reservoir is operated under a formal <br />flood control plan. On March I, 1974, Navajo <br />Reservoir had 986,000 acre-feet of storage. The <br />April-July inflow forecast on March I was <br />600,000 acre-feet. The wrrent flood control <br />diagram allowed the reservoir to be full with an <br />active storage of 1,696,400 acre-feet during the <br />entire 1974 snowmelt runoff season based on the <br />March I forecasts and subsequent forecasts made <br />during the snowmelt runoff period. Therefore, the <br />scheduled operation of the reservoir did not <br />include any releases specifically required for flood <br />control. (Chart 5) <br /> <br />Releases were scheduled to control <br />downstream flows to the minimum level practical <br />in order to minimize bank erosion, <br /> <br /> .,. <br /> t <br />\~ }ZJ- g;.~'~ '~, ~'f, ;;i~: , ,. \ '-/. '" ., ., ~-. , <br />- - <br /> <br />w > <br />z ~ <br />;; ~ <br /> <br />~ <br />'-' <br />c <br />,. <br /> <br />> oj <br />o w <br />Z 0 <br /> <br />z w <br />-; ~ <br /> <br />c:: ri >- <br />~ " ~ <br />, ~ , <br />Wilter Year '974 <br /> <br /> <br />10 <br />