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<br />. <br /> <br />Elkhorn conduit shouJ.d be designed for a ma.xilllUlll discharge of <br />about 300 cfs. This considers power water available at the Rustic. <br />Diversion Dam in a year of high runoff (approximately 200,000 acre- <br />feet), with diversion being made at design rate for a period of <br />about 330 days. <br /> <br />An active capacity of 4,600 acre-feet was selected for Cache <br />la Poudre Forebay, based upon a preliminary appraisal of the site <br />limitation. Of that capacity, approximately 1,200 acre-feet wouJ.d <br />be required to regulate power releases to the Cache la Poudre Plant <br />during a week of peaking generation. The remaining 3,400 acre-feet <br />would be used to permit releases to the Cache la Poudre Plant in <br />excess of the Elkhorn Conduit discharge over extended periods. <br /> <br />A SUllUllary of annual generation at Idylwilde and Cache la Poudre <br />Powerplants is presented in Table 9. Monthly generation and load <br />factors at the Cache la Poudre Powerplant for a typical year and for <br />years of high and low runoff are shmm in Table 10. The generation <br />values were determined using information listed below and the operation <br />studies: <br /> <br /> Powerplant Idylwilde Cache la Poudre <br /> Average operating head for <br /> power (feet) 278 1,l70 <br />. Plant efficiency (percent) 80 83.5 <br />Gross generation,(I~IH/AF) 227 1,000 <br /> <br />Net generation or salable energy Was taken as 92.5 percent of the <br />gross generation, allowing 7.5 percent for transmission line loss. <br /> <br />The power system as presented in this report is flexible enough <br />to permit variation in the operation from the plan used in determining <br />the values of Tables 9 and 10. The entire capacity, 4,600 acre-feet, <br />of the Cache la Poudre Forebay instead of only 1,200 acre-feet could, <br />for example, be used to vary the daily or monthly load factor of the <br />Cache la Poudre Powerplant. <br /> <br />Future studies wouJ.d include a pO~fer market survey to determine <br />the shape of daily and seasonal load curves to determine the potential <br />peaking load. The scope of the study and the emphasis applied wouJ.d <br />depend upon whether peaking facilities are planned to serve preference <br />customers onlY or to be integrated with the total power generation <br />facilities of the area. <br /> <br />At present there are no rate schedules or precedents for sale of <br />peaking power in the Western Division area. Therefore, the market study <br />wouJ.d include exploration of the potential peaking power market to <br />obtain data for rate making purposes. Sale of peaking power with return <br />of energy by the customer ~fith therrral generation wouJ.d be explored also. <br /> <br />. <br /> <br />39 <br /> <br />