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<br />Navajo Reservoir <br /> <br /> <br />STATISTICS <br /> <br />ACTIVE STORAGP <br />lACRE.FEET) EleVATION (FEET) <br />1,696,400 6085 <br />660.500 5990 <br />15.610ACRES <br />33MIlES <br /> <br />RESERVOIR <br />MAXIMUM STORAGE <br />INACTIVE. STORAGE <br />SURFACE AREA IFULl) <br />RESERVOIR LENGTH (FULL) <br /> <br />'do~! nor include 12,600ilcre f~rof dead ISIof8ge below eleVdtlon 5775 feel <br /> <br />OUTFLOW <br /> <br />During water year] 972 Navajo Reservoir was <br />kept within the limits specified by the Bureau of <br />Reclamation in its interim operating rules. The <br />reservoir was lowered to elevation 6,010 feet <br />during the winter of 1971 and spring of 1972. <br />During 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 />259,000 acre-feet or 31 percent of the long-time <br />April-July runoff average above Navajo. The <br />reservoir reached a seasonal high of elevation <br />6,024 feet with an active storage of 950,000 <br />acre-feet. It was held at or near this elevation <br />during the summer months for recreational <br />purposes by continuing a release of 500 c.f.s. <br />Navajo Reservoir is operated under a formal <br />flood control plan. On March 1, 1972, Navajo <br />Reservoir had 875,100 acre-feet of storage. The <br />April-J uly inflow forecast on March I was <br />700,000 acre-feet. The current 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 \972 snowmelt runoff season. Therefore, <br />the scheduled operation of the reservoir did not <br />include any releases for flood control. (Chart 5) <br /> <br />:1 <br /> <br />c <br />2 4 <br />o <br />u <br />~ 3 <br />~ <br />w 2 <br />w <br />;:; 1 <br />~ 0 <br />u <br /> <br />nl <br />~I <br /> <br />-"~~ <br />AVERAGE '-... "," !' -, <br />... t-~.- .-\ <br />~".'.:\ <br />~h< '\ <br />-.;;\'\~~ \ <br />"" -/~ ."." ,:. -"': <br />- , ., ". . 'J., <br /> <br />LOWERa~UARTlLE "~',~~t:~~\~ <br />'~P,;,,1.;'~~~~~~ <br />_._ --. ---- -~__-t, - .2 ~'..J~;~. <br />MOST ADVERSE - ""~" ' ''-~~i'\..'{\ <br />mm-'~1":~ 't:'~:::~\ <br />............ --- --.._~ ":-"" ,~ <br />" -':'~ .,~~. <br />~,~~...;:,.'- <br />~, _ _ .... __ __ __ _ _ _ _ ~ _ _ _ _ _ ____.;.~ _w~ <br />g:ttil)~Zffi~~~~~gl1.." <br /><(u'lozo~u..~<(::!:~~<(~ <br />WilterYeu 1973 <br /> <br /> -r-'. -, , c- - , , ~ <br /> " <br />- - ,.... -. - -" - - - --rr ~ -~ ~,< <br />- , . w":' <br /> <br />" " ~ <br />~ ~ ~ <br />~ ~ ~ <br />Willer Year 1972 <br /> <br />w ~ <br />~ ~ <br /> <br />...: ;; u <br />u 0 w <br />020 <br /> <br />z ~ <br />~ ~ <br /> <br />10 <br />