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<br />Navajo Reservoir <br /> <br /> <br />I <br />I <br />1- <br />-"/ <br />Chart 6 <br /> <br />STATISTICS <br />ACTIVE STORAGE" <br /> <br />RESERVOIR (ACRE ELEVATION <br />FEEn lFEEn <br /> <br />MAXIMUM STORAGE 1,696,400 6065 <br />INACTiVE STORAGE 660.500 5990 <br />SURFACE AREA (FULU 15.610 ACRES <br />RESERVOIR LENGTH <br />I~ULLl )3MIlES <br /> <br />'d"~$ nOllnclurk /2,600 ilere feel of deMl srOf~~ <br />~/o"'ele"ilfion5775'eer <br /> <br />4 <br /> <br />3 <br />2 <br /> <br />1; 0 <br />~ 4 <br />u <br />~ 3 <br />." <br />w 2 <br />~ <br /> <br />OUTFLOW <br /> <br />UPPER QUARTILE <br /> <br />AVER GE <br /> <br />During water year 1977, Navajo Reservoir was kept <br />within the limits specified by the Bureau of Rec- <br />lamation in its interim operation rules. The reser- <br />voir water surface was lowered to elevation 6.039 <br />feet during the winter of 1976 and spring of 1977. <br />The actual April-July inflow to Navajo Reservoir was <br />119,000 acre.feet, or 15 percent of the long-time <br />April-July runoff average above Navajo. Releases <br />for downstream requirements and inflow into Na- <br />vajo were about the same. which caused the reser- <br />voir to be level during the recreation season. <br /> <br />Navajo Reservoir is operated under a formal flood <br />control plan. On March 1. 1977. Navajo Reservoir <br />had 1,120.000 acre-feet of water in storage. The <br />April-July inflow forecast on March 1 was 200,000 <br />acre-feet. Based on fhe March 1 forecast, the cur- <br />rent flood control rules allowed the reservoir to be <br />full. and the scheduled operation of the reservoir <br />did not include any releases specifically for flood <br />control. (Chart 6.) <br /> <br />Releases were scheduled to conserve water in stor- <br />age while providing for minimum downstream flows <br />at points of diversion for consumptive use and for <br />maintenance of fish and wildlife resources. <br /> <br />~! <br /> <br />" \ \ \ <br />I I I I <br />- -~,: m :m<~ <br />~' <br /> <br />~:-- <br />o ~ ~ r.~1: .It(~ 31:\-.: ':~.~' <br />4 <br /> <br />-"'! ;;..\~.~ <br />, ,N.... "'''' t.'~~"''''' >M ~ .'" .' '''"", .'.. <br />;~~':I14:<~.?l;'..~ ::~:.p:'~~!Iol'X-i~~~':~::'~ ~,::7$~' '~^f:;~::t ,T';J.,~~~.~ ,V~ <br />LOWER QUARTILE <br /> <br />12 <br /> <br />u <br />. <br />o <br />u <br />8 <br />= 3 <br />~ 2 <br />" <br />< <br />~ <br />~ 0 <br /> <br />MOST ADVERSE <br /> <br />I~' <br />~~, <br /> <br />" ~- ~ ; " <br /> <br />~, <br /> <br />.<(':-Ce.,'",.,:- <br /> <br />.,,~<+i m-~~":.'!;::;t,.,. <br />Cll a:: a: >- "'" >- I..? <br />~~~~~~~ <br />Wn'rY.~r'l' 11 <br /> <br />~." <br />..' '-, :... <br />(', ~.. <br />~',.- ,'~':;f~: <br />t~ ,. ~?rr})~' <br />- ,- <br />,~? <br /> <br />~"" <br /> <br />~ ~ g: ~ <br />L.L. ~ <( ~ <br />Wit.. Y~ar I'JJ <br /> <br /> , - ~, t. ...,.;, <br />W , ~ " > <br />Z ~ " U Z <br />~ ~ 0 ~ I g 0 W '" <br />< Z 0 <br /> <br />.' <br />~I <br />