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<br />Lake Powell [Colorado River] <br /> <br /> <br />Boating on Lake Powell. <br /> <br />Water year 1982 <br />During water year 1982. lake Powell, which /. <br />Impounded by Glen Canyon Dam, was <br />operated 8S part at the Colorado River Storage <br />Project (CASP) In accordance with governing <br />contracts and laws to provide river regulation, <br />optimum power production, recreation, and <br />fish and wildlife enhsf'cement. <br /> <br />On September 30,1981, the lake Powell <br />water surface elevatIon was 3672 feet with an <br />active storage of 20,751,000 acre-feet. The <br />April-July 1982 runoff above lake Powell was <br />8,392,000 acre,teel, approximately 110 <br />percent of the long-term average. The water <br />surface elevation was drawn down to a <br />mln/mum of 3662 te.t by mid-February, and a <br />maximum level of 3687 feet was reached by <br />Augu.11982, Thl. approximate 'eve' was <br />maintained throughout the remainder of the <br />water year. Total releases from Lake Powell <br />amounted to 8,295,000 acre-teet. <br /> <br />14 <br /> <br /> <br />SplllwaYlln operation at Glan Canyon Dam. <br /> <br />Water Vear 1983 <br />By the end of September 1982, the alevatlon of <br />lake powell w.. 3687 feet with a ""ntent of <br />23,005,000 acre-teet. Under average runoft <br />condItions, the reservoir Is expected to be <br />drawn down to about 3681 feet by the spring <br />of 1983, and reach a maximum elevation of <br />3699 feet by the end at July, At thl. e/evallon, <br />the content Is 24.9 million acre-feet, 100 <br />percent of active capacity, and the 9urface <br />area Is approximately 160,650 acres. Under <br />most probab'ethrough upper quartile Inflow <br />conditions, releases from Lake Powell are <br />prolectaO 10 range tram 9,61012.0 million <br />acre~feet In order to equalize storage with <br />lake Mead by the end of September 1983. <br />Under lower Quartile conditions, or less. the <br />scheduled releases are 8.23 million acre.feet. <br /> <br />lake Powell Active Storage' <br />Reservoir (Acre-Foot) <br /> <br />MaXimum Storage <br />Raled Head <br />Minimum Power <br />Surface Area (Full) <br />Reservoir Length <br />(Full) <br /> <br />Power Plant <br />Number of Units <br />Total Capacity <br /> <br />Chart 5 <br /> <br />EI. <br />(Ft.) <br /> <br />25,002,000 3700 <br />9,428,000 3570 <br />4,126,000 3490 <br />161,390 Acres <br /> <br />186 Miles <br /> <br />8 <br />1,021,000 Kilowatts <br /> <br />'does nollncrude tJ.998,OOO acre-leet of de8d <br />lllorage below 337u reet <br />