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<br />'i) <br /> <br />. <br /> <br />-Existing spring flood control operations (using discretion and being proactive to <br />keep 14,000 cfs or [normally] considerably less at Delta [Delta City area above <br />the Uncompahgre confluence D. The flood control manual requires that efforts <br />are made to keep flows fr@fflR@t @)[GGG€liRgbelow 15,000 cfs, March 31 target <br />for Blue Mesa, which is variable based on forecasted inflow, maintained to reduce <br />flooding and reduce powerplant bypasses, <br /> <br />-Blue Mesa winter icing target-7490 feet at end ofDecember-- met to reduce <br />chances of ice j ams causing upstream flooding in the Gunnison area, for example <br />in the Dos Rios subdivision area. <br /> <br />-Peaking power operations at Morrow Point and Blue Mesa, re-regulating flows <br />downstream from Crystal through constant releases to offset impacts of peaking <br />operations upstream. Blue Mesa releases range from 0 to 3,400 cfs; Morrow <br />Point releases range from 0 to 5,000 cfs. When Crystal powerplant is operating at <br />full capacity, daily fluctuations in the 200 cfs range may occur due to changes in <br />Crystal Reservoir elevation (programmable logic control, which provides stable <br />releases, cannot be used at full powerplant capacity), During Crystal spills, <br />Morrow Point peaking reduced to avoid large daily fluctuations downstream from <br />Crystal. <br /> <br />. <br /> <br />-For Morrow Point tour boat operations, the goal is to hold Morrow Point <br />elevation between 7151 and 7158,5 feet during the May to September 15 <br />recreation season; however, these elevations are not a strict rule and may be <br />periodically modified to address other needs. When the tour boat is not in <br />operation, daily fluctuations are normally between elevations 7144 and 7160, <br /> <br />-A spring peak is determined annually by Reclamation with input received from <br />the Aspinall operations meetings. "Shaping!" of "excess water" (water that is <br />projected to bypass Crystal powerplant) into a spring peak for general <br />environmental purposes (for example channel maintenance in Gunnison Gorge <br />and Black Canyon, control of riparian vegetation encroachment, cottonwood <br />regeneration, downstream recreation, fisheries, channel maintenance in Delta <br />area, etc). The peak would be planned to occur during the spring-early summer <br />period, From January through April the goal will be to operate the Unit to release <br />all water through powerplants and to reduce future bypasses of powerplants while <br />still giving priority to filling Blue Mesa (flood control may occasionally require <br />early bypasses). The Crystal Powerplant bypasses, if any, identified based on the <br />May 1 forecast will be used to shape the peak without intentionally bypassing <br />Morrow Point and Blue Mesa Powerplants. It is recognized that if the May I <br />forecast proves to be higher than the actual inflow, there is some risk of not filling <br />Blue Mesa. Adjustments may also be made in the spring peak plan if the May 15 <br />forecasted inflow changes significantly upward or downward. Water for the peak <br />may be released over the Crystal spillway with full consideration given to <br /> <br />. <br /> <br />I Shaping would involve "compressing or consolidating" bypass flows into peak. <br /> <br />3 <br />