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BOARD02159
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BOARD02159
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Last modified
8/16/2009 3:12:55 PM
Creation date
10/4/2006 7:11:57 AM
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Board Meetings
Board Meeting Date
9/13/2005
Description
ISF Section - Aspinall Unit Operations EIS
Board Meetings - Doc Type
Memo
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<br />~ <br /> <br />. <br /> <br />. <br /> <br />C. Crystal I. Riverregulation: Curecanti Unit, No <br />Dam Flows relatively Economic Justification River regulation is <br /> uniform. When the Report, April 1962 non-discretionary <br /> powerplant is but some <br /> operating at full fluctuation due to <br /> capacity, fluctuations reservOir <br /> could be in the 200 elevations, <br /> cfs range because the <br /> programmable logic <br /> control cannot be used <br /> at full powerplant <br /> capacity. <br /> 2, Ramping rates: Ramp rates set for safety Yes <br /> SOO cfs per day of people recreating in <br /> change for ramping the canyon and for fish <br /> up, and 400 cfs per considerations.; al88 a <br /> day for ramping darn oafe!) [! ~1l8id@fatign. <br /> down. <br /> 3, Drawdown Dry season drawdown No <br /> restrictions limited to 10 feet in 24 <br /> hours and 15 feet in 72 <br /> hours, Wet season <br /> drawdown limited to 5 <br /> feet in 24 hours and 20 <br /> feet per week. <br />D. Spring I, The spring peak is Historic practice to Yes <br />Peak determined annually benefit fish and <br /> by Reclamation with recreation, channel <br /> input from the maintenance, and general <br /> Aspinall operations health of the river. <br /> meeting. During the January <br /> . Total volume through April period, <br /> determined from operations will attempt <br /> amount of bypass to reduce the amount of <br /> hydrologically spring bypasses; <br /> necessary, however, it is <br /> . Normally scheduled recognized that there <br /> in May/June would be discretion in <br /> timeframe based on action alternatives to <br /> the May 1 forecasts- bypass Unit <br /> can be adjusted if powerplants while <br /> significant changes on providing endangered <br /> May 15 forecast. fish flows. <br /> . Bypass flows <br /> consolidated over a <br /> <br />13 <br />
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