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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 />Reservoir statistics <br /> <br />. <br /> <br />The following is a list of current hydrologic statistics and criteria to be included in the <br />hydrological evaluation ofthe No Action alternative: <br /> <br />11 <br /> <br />S ' <br /> <br />. <br /> <br />Asoina VOlt tanstlcs <br /> Blne Mesa I Morrow Point Crystal <br />Capacities (acre-feet) <br />Dead storage 111,200 165 7,700 <br />Inactive storage 81,070 74,905 4,650 <br />Active storage 748,430 42,120 12,890 <br />Live storage 829,500 117,025 17,540 <br />Total storage 940,700 117,190 25,240 <br />Outlet capacities (cubic <br />feet-per-second [cfs]) <br />Power plants (max) 2,600-3,400 5,000 2,150 <br />Bypass 4,000-5,100 1,500 1,900-2,200 <br />Combined (max) 6,100 6,500 4,350 <br />Soillwav 34,000 41,000 41,350 <br /> <br />* <br />-Live storage is the combination of the active and inactive storage, It represents storage <br />that physically can be released from the reservoir. <br />-Crystal powerplant capacity may be adjusted following testing-the new capacity may <br />affect reservoir targets. <br />-Blue Mesa Reservoir shares one penstock for both river outlet and powerplant releases; <br />the combined releases of these two are constrained to about 6, I 00 cfs. <br />-The hydraulic capacities shown in the table assume full reservoir conditions. At lower <br />elevations, the hydraulic capacity would be less. Also system efficiencies may affect the <br />hydraulic capacity. <br />-Full capacity may not always be available due to scheduled maintenance, 01' equipment <br />malfunction, or power system reserve requirements. <br />-There are no specific recreation or fishery pools in the reservoirs. <br /> <br />. <br /> <br />Elements of No Action Alternative <br /> <br />-Aspinall Unit in place, regulating the river using current operating practices as a guide, <br />and operating for authorized Unit purposes under Highly ':!lfiool~ a full range of annual <br />inflow conditions. These current practices include: <br /> <br />-Filling Blue Mesa Reservoir at end of runoff season-Full reservoir is 7519.4 <br />feet; operations designed to reach around 7517 feet (or less, dependent on <br />forecast) which provides a safety factor for controlling the reservoir in case of <br />sudden high inflow events due to thunderstorms or high rate of snowmelt. <br /> <br />I <br /> <br />2 <br />
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