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<br />14 <br /> <br /> <br />STATISTICS <br />ACTIVE STORAGE- <br />RESERVOIR <br /> <br />CACRE. ELEVATION <br />fEETI (FEETI <br />25.002,000 J10Q <br />9,428.000 J!i70 <br />4,126.000 3490 <br />161,J90ACRES <br />1116o,\ILES <br /> <br />MAXI~UM ST051AGE <br />RATED HEAD <br />MINIMUM POWER <br />SURFACE AflEA (FULL! <br />RESE!ll/OIR LENGTH (FULL\ <br />POWER PLANT <br />NUMB(A Of UNITS B <br />TOTAL CAf'ACITY OF UNITS 900,000 KllOWAT"TS <br />'dotl IIor ""Iudtl 7.998.000~" INr 01 d~MJ rror.~ <br />~/owJ370(~r <br /> <br />Glen Canyon Dam. <br />Lake Po~ell <br /> <br />gage at Lees Ferry, Arizona, was <br />10.4 million acre.feet, or 133 per- <br />cent of the 1906.68 average. A <br />record high.water elevation oc- <br />curred on July 25, 1975. when the <br />reservoir contained 21,177,000 <br />acre.feet of active storage, with <br />the water surface o.t elevation <br />3,675 leel. That was about 8leet <br />higher than the former record in <br />1974. (Chart 6.) <br /> <br />During water year 1975. Lake <br />Powell was operated as part of the <br />Colorado Rh'er storage project in <br />accordance with governing com- <br />pacts and laws to provide river <br />regul~tion, optimum power pro. <br />duction, recreational opportuni. <br />ties, and fish and wildlile benefits. <br /> <br />On September 30, 1974, Lake <br />Powell water surface elevation was <br />at 3,652 feet with an active stor- <br />age of 18,010,000 acre.feet. Dur- <br />ing the fall and winter months, <br />the reservoir water level remained <br />fairly constant. Releases of water <br />for hydropower generation were <br />scheduled in the early spring to <br />integrate surplus hydroelectric <br />power from the Northwest with <br />CRSP power production. The <br />April.July 1975 runoll above the <br /> <br /> <br /> 20 <br /> 10 <br />i5 0 <br />z <br />820 <br />w <br />'" <br />>= <br />w 10 <br />w <br />~ <br />u <br />0; <br />~ 0 <br />u <br />o 20 <br />0 <br />c <br />'" 10 <br />w <br />'" <br />" <br />w <br />~ <br />w 0 <br />~ <br /> 20 <br /> 10 <br /> 0 <br /> ~ ? U z <ri <br /> g 0 w ~ w <br /> 1.- Z a ~ <br /> <br />~ " > <br />" . " <br />~ " ~ <br />WattrYe~r 19U <br /> <br />OUTFLOW <br /> <br />w <br />Z <br />~ <br /> <br />> <br />~ <br />~ <br /> <br />z <br />~ <br /> <br />w > <br />z ~ <br />~ ~ <br /> <br />" <br />~ <br />" <br /> <br />u <br />w <br />" <br /> <br />c:l ri >- <br />~ :!: ~ ~ <br />WaterYearlt1' <br /> <br />> <br />o <br />z <br /> <br />/)..: ti <br />~I 0 <br /> <br />. <br />w <br />'" <br />I <br />