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<br />'\\ <br /> <br />," <br /> <br />7 of 18 <br />icing target-7490 feet at end of December-- met to reduce chances of ice <br />jams causing upstream flooding in the Gunnison area around Dos Rios. <br /> <br />. <br /> <br />o Peaking power operations at Morrow Point and Blue Mesa, re-regulating <br />at Crystal through constant releases. Blue Mesa releases range from 0 to <br />3,400 cfs; Morrow Point releases range from 0 to 5,000 cfs. When Crystal <br />powerplant is operating at full capacity, daily fluctuations in the 200 cfs <br />range occur due to changes in Crystal Reservoir elevation (programmable <br />logic control cannot be used at full powerplant capacity). During Crystal <br />Spills, Morrow Point peaking reduced to avoid large daily fluctuations <br />downslream from Crystal. <br /> <br />o For Morrow Point tour boat operations, the goal is to hold Morrow Point <br />elevation between 7151 and 7158.5 feet during the May I to September 15 <br />season. When the tour boat is nol in operation, daily fluctuations are <br />normally between elevations 7144 and 7160. <br /> <br />. <br /> <br />o A spring peak is determined annually by Reclamation with input from the <br />Aspinall operalions 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 <br />Gorge and Black Canyon, pF9teGtiSR removal of riparian vegetation, <br />downstream recreation, channel maintenance in Delta area, etc) ~peak <br />would generally be planned to occur during the spring-early summer <br />period. From January through April the goal will be to operate to release <br />all water through powerplanls to reduce future bypasses while still giving <br />priority to filling Blue Mesa (flood control may occasionally require early <br />bypasses). The Crystal bypasses, if any, identified based on the May 1 <br />forecasl will be used to shape the peak without inlentionally bypassing <br />Morrow Point and Blue Mesa Powerplants. It is recognized that if the <br />May 1 forecast proves to be higher than the actual inflow, there is a some <br />risk of not filling Blue Mesa. <br /> <br />o Crystal release ramping rates--Individual flow changes should be 100 cfs <br />or less when canyon flows are less than 500 cfs; 200 cfs or less when <br />canyon flows are between 500 and 1,000 cfs, and 300 cfs when canyon <br />flows are above 1,000 cfs. These individual changes can be made every 6- <br />12 hours, if necessary. Higher rates may be used 10 react 10 special <br />circumstances, for example flood control and emergencies. <br /> <br />o Reclamation's historic operalions to meet 300 cfs downstream from the <br />Gunnison Tunnel except in certain cases of significant drought (as <br />determined by reservoir elevation projections) and Unit emergencies when <br />releases may be reduced to 200 cfs as measured at the USGS Gage below <br />the Gunnison Tunnel. <br /> <br />. <br /> <br />1 Shaping would involve "compressing or consolidating" bypass flows into peak. <br /> <br />Flood Protection. Water Project Planning and Fina.ncing . Stream and Lake Protection <br />Water Supply Protection. Conservation Plarming <br />