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<br /> <br />. <br /> <br />CHAPTER III <br /> <br />INITIAL DEVELOPMENT <br /> <br />A peak capacity of 260 second-feet was estimated to be required for <br />Deadman Bench Canal at its head at Juniper Dam and a peak capacity require- <br />ment of 130 second-feet was estimated for the canal below the Sunbeam Canal <br />turnout. The peak capacity for the turnout to Sunbeam Canal was also esti- <br />mated at 130 second-feet, <br /> <br />Juniper Reservoir operation and energy production <br /> <br />A simulated operation of the Juniper Reservoir under the initial <br />development was made by successive annual filling and drawdown seasons over <br />the 40-year period 1922 through 1961. A summary of this study and estimates <br />of energy production over the study period are given on the fOllowing page. <br /> <br />. <br /> <br />The annual filling season in the operation study usually includes the <br />months of March or April through June or July with the following drawdown <br />season including the months of July or August through the following March <br />or April. The reservoir was operated to meet the average monthly project <br />irrigation water requirements, a minimum continuous release of 200 second~ <br />feet to Yampa River for stream fishery and power production at practically <br />100 percent plant factor for about 2,500 kilowatts, and an additional firm <br />monthly release of about 48,000 acre-feet for peaking power production at <br />a firm monthly plant factor of approximately 3B percent for the 27,500-kilo- <br />watt peaking portion of the power production. In actual operation release <br />of firm peaking power water could vary by hours and days during the month <br />as required for power peaking operations, Also in actual operations some <br />flexibility through storage operations during the reservoir drawdown season <br />would permit peaking power water to be conserved for release during system <br />peak power load seasons and thus would permit peaking operations at a higher <br />plant factor in such peak seasons. The estimated normal monthly project <br />water requirements for releases at Juniper Dam would be approximately as <br />shown in the table on page 66. <br /> <br />As in the operation study for the comprehensive plan. advance water <br />releases in anticipation of reservoir spills were made in the operation <br />study for the initial development to augment normal energy generation by <br />minimizing spilling in excess of power-generating capacity. In actual <br />operation the advance releases would be based on progressive runoff fore- <br />casting and the forecasting would be made on a conservative basis to give <br />reasonable assurance that the reservoir would be filled by the end of the <br />filling season. Thus in most months when advance power water releases <br />would be made the powerplant would be operating at a 100 percent plant <br />factor. <br /> <br />. <br /> <br />Results of the operation indicate that the active capacity of the <br />reservoir would have been completely full or virtually full at the end of <br />the filling season in all but 5 years of the 40-year study period. Advance <br />water releases for energy generation in anticipation of reservoir spills <br />would have been made in 32 of the 40 years and remaining reservoir spills <br />of significance in excess of the powerplant generating capacity would <br /> <br />64 <br /> <br />