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<br />Water Year 1987 <br /> <br />Lake Powell begins the water year at elevation 3,689.6 feet <br />with an active content of 23.4 MAF (93.4 percent full). The <br />plan of operation through December is to maintain releases <br />at about 65 percent powerplant capacity, and then to increase <br />releases during the January through March period to about <br />74 percent of powerplant capacity to reduce the risk of <br />spilling during the 1987 runoff season. This will develop <br />sufficient vacant reservoir space, and also maximize power <br />output during the winter months. <br /> <br />Assuming average runoff conditions, releases from Lake <br />Powell for water year 1987 will be 14.7 MAF. A reasonable <br />minimum level of inflow would produce an annual release of <br />11.7 MAF, and a reasonable maximum level of inflow would <br />require that 17.2 MAF be released during the water year. <br />Releases from Lake Powell after January 1, 1987, will be <br />reevaluated based upon runoff forecasts reflecting current <br />hydrologic conditions. It is expected that powerplant bypasses <br />will be avoided in all three operating plans. <br /> <br />LAKE POWELL STORAGE <br /> <br />\DOO,OOD ACRE-FEET <br />.. <br /> <br /> <br />.. <br /> <br />.. <br /> <br />" <br /> <br />" <br />ON D J,," A Y J J A II ON D J'" A" J' A IS <br />ACTUAL 'US8 AND PROJECTED 11187 <br /> <br />PROJECTED OPERATION 1987 <br />REASONABLE MAXIMUM RELEASES <br /> <br />1100 en <br />.. <br /> <br />.. <br /> <br />.. <br /> <br />11.."'--- .~. <br /> <br />.... '. <br /> <br />to <br /> <br />to <br /> <br />o <br /> <br />MOST PROBABLE RELEASES <br /> <br />.. <br /> <br />.. <br /> <br />.. <br /> <br />to <br /> <br /> <br />to <br /> <br />o <br /> <br />REASONABLE MINIMUM RELEASES <br /> <br />.. <br /> <br />.. <br /> <br />.. <br /> <br /> <br />.. <br /> <br />,. <br /> <br />. <br />ONDJPMAMJJASO <br /> <br />14 <br />