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<br />\'"ESTE~'\" DIVISIOX PO\VER SYSTElVl <br />'YATER YEAR 1997 - GENERATIO~ AND PUxlP E~ERGY <br /> <br />The Western Division Po\\-er System (System) boundaries are illustrated in Exhibit 1. An above <br />a"-erage runoff caused the System generation to be abow average for the 1997 water year. System <br />energy deficits were experienced during the fall and winter. <br /> <br />During the 1997 \\-mer year the total System generation for load was 2.583.5 gigawatt-hours (gWh) <br />compared to a total System load of 2.213.9 g\Vh. The total generation for load is the gross generation <br />less the total CBT Project pumping: gross generation includes one-half of the Yellow tail generation. <br />The total System load includes firm energy deliveries. Project use energy. suppon energy, Plant station <br />sen-ice. and an estimate of transmission system losses. The System experienced energy deficits from <br />October through January. and September. ranging from 81.9 gWh in October to 4.0 gWh in September. <br />Energy surpluses were experienced from February through August. ranging from 9.3 gWh in February <br />to 170.7 g\\-h in June. Table 3 shows monthly generation and pumping energy by plant as well as <br />monthly System loads for water year 1997. The total gross generation (Table 1) was 129 percent of <br />average and 454.7 g\Vh more than in water year 1996. The total pump energy (Table 2) was 179 <br />percent of awrage and 93.5 g\Vh greater than the previous year. <br /> <br />The revenue from power sales was S..t! .441.000 in the 1997 water year. Energy deficits were covered <br />by a combination of scheduled interchange energy. use of the Mt. Elbert Pump Storage Plant. and <br />pO\\"er purchases. The Western Area Po\\-er Administration' s Lowland Area Office power purchases <br />total 5754.000 for water year 1997. <br /> <br />I <br />