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<br />L ~'') r. .I. <br />ud L i-o.,' . <br /> <br />requirements to conserve storage. Due to cooperation with irrigation <br />districts, adequate storage was available in 1977 to supply all <br />irrigation requirements. <br /> <br />Heart Mountain Powerplant was shutdown on November 10 to allow for <br />inspection of the Canyon conduit. Reservoir releases were reduced <br />from 680 to 365 ft3/s, the full capacity of the Shoshone Powerplant. <br />The inspection was completed on November 24, and releases were returned <br />to 680 ft3/s. <br /> <br />The February 1 forecast indicated the spring runoff would be well <br />below normal. Thereforel reservoir releases were gradually reduced <br />from 680 to about 160 ftj/s between February 1-9, to conserve water <br />for the upcoming irrigation season. <br /> <br />The March 1 forecast indicated that the April-July inflow to Buffalo <br />Bill would be 415,000 acre-feet, or about 100,000 acre-feet less <br />than that forecast on February t. Releases were cut from 160 to <br />135 ft3/s on March 4 and further reduced to 88 ft3/s on March 5. <br />The Heart Mountain Powerplant was completely shutdown and all reservoir <br />releases were passed through the Shoshone Powerplant. Downstream <br />accretions increased the flow to about 180 ft3/s at the Cody gage. <br /> <br />Releases to the Heart Mountain Canal were initiated on April 18. <br />River releases were also increased at this time to supply downstream <br />irrigation demands. River discharge varied from 130 to about 1,300 ft3/s <br />during the spring and summer months as needed to meet irrigation <br />requirements. <br /> <br />All three units of the Shoshone Powerplant were shutdown for repairs <br />on August 4. The plant was shutdown until repairs were completed <br />on September 21. <br /> <br />A yearend storage of 185,200 acre-feet was below a 17-year average <br />of 301,000 acre-feet. <br /> <br />Western Division System Power Operation <br /> <br />The Western Division Power load of 1,716 gigawatt-hours during Water <br />Year 1977 was 16 percent less than the forecast load of 2,040 gigawatt- <br />hours used in the Annual Operating Plan. The actual loads were down <br />due to reconfiguration of East-West loads and losses, as well as <br />mild weather conditions in July and August. <br /> <br />As a result of below normal snowmelt runoff and heavy irrigation <br />use, the Western Division System generation totaled 1,608 gigawatt-hours <br /> <br />20 <br /> <br /> <br /> <br />...,...(....:...;;: <br />. '. <br />~', ' <br /> <br />"..:.:'::<::;:;':';~:'/.;''; <br />." .;..... '::." <br /> <br />"..:. ..... . .'~ <br />.-.-. ..... <br /> <br />,........ <br /> <br /> <br /> <br />. " ~ '"'.~. <br />;'::.~<~>~, .:.<. <br /> <br />-,~. <br /> <br />". <br /> <br />., <br /> <br />~'-~;'~'~; :: <br />'..... <:-. <br />". ...., <br /> <br />.......... <br /> <br />:.:r':~. <br /> <br />.. <br />:::>?.<. <br /> <br />~~t[i~. <br /> <br />:::/....:.:' <br /> <br />.~(:;i:. <br /> <br />:;...0:/..,:.. <br /> <br />r.:-:~'.;. . <br />:'.:.~ . ";';.' <br />;:~':~>'/ <br /> <br />,:".:::.". <br />." '" <br /> <br />'j. <br /> <br />....; '" <br /> <br />tn~ <br /> <br />(.~:,..::... <br />::.:....i..::. <br />.,~\--.:::. <br />/;~~;!:: <br />~l <br /> <br /> <br />.'.;:......., <br /> <br /> <br />~;1 <br />;~1:i;;, <br />~ <br /> <br />; .' .':.::~:; <br />:;:...'~..:.~ <br />~!;~;f~;/ <br /> <br />:-......-..;...,. <br /> <br /> <br />i <br /> <br />;::XY:~:: <br /> <br />:.'. ::i-, <br /> <br />;.;--:-.-.:::.;. <br /> <br />......?-- <br />.....,..~:j <br />":':---';.: <br /> <br />c.,... . <br />:.:~: >,;>'. <br /> <br />..:;;';::..', <br />-. .' <br /> <br />-::<." :~ '~:" <br /> <br />".' <br /> <br />. .-::~:". <br /> <br /> <br />'. . <br />