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Last modified
1/26/2010 3:12:49 PM
Creation date
10/12/2006 4:18:56 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8282.600.40
Description
Colorado River Annual Operations Reports
Basin
Colorado Mainstem
Date
1/1/1999
Author
USDOI/BOR
Title
Colorado River Reservoir Operation Status Reports Part 1
Water Supply Pro - Doc Type
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<br />., <br /> <br />Glen Canvon Dam - Unregulated inflows to Lake Powell were about 114 percent of normal in <br />January and actual inflows into Lake Powell varied between about 7.000 and 11,000 cfs. Lake <br />Powell current reservoir elevation is now about 3680 feet with a live storage of 21.3 MAF. <br /> <br />Current snowpack conditions continue to improve and the basinwide snowpack is 92 percent of <br />nortnal. The distribution of the snowpack is relatively unifortn. with most subbasins between 80 <br />and 100 percent of nOrtnal. <br /> <br />The National Weather Service forecast issued on February 4 predicts a spring runoff volume for <br />1999 of 87 percent of nortnal. February releases will continue to average about 15,000 cfs, with <br />weekday and Saturday hourly flows fluctuating between about 10,500 cfs and 17.500 cfs, and <br />Sunday flows fluctuating between 10,500 cfs and 15,500 cfs. <br /> <br />With this increased snowpack, it is less likely that the March through May releases will be <br />reduced as we expected last month. At this point in time we predict March releases to continue <br />at an average of 15,000 cfs, with April and May releases slightly lower at about 12.000 cfs. <br />However, much of the snow accumulation season still remains. and late winter and spring <br />precipitation will probably alter the ltxpected runoff and releases. Our website at <br />www.uc.usbr.gov will be updat~d monthly to show expected releases for the remainder of the <br />water year. <br /> <br />With respect to the triggering of a BeachlHabitat Maintenance Flow (BHBF). the current spring <br />runoff forecast would not indicate that a BHBF is likely this year. This is particularly <br />true for the next few months. The releases this spring are less certain. Since Lake Powell is <br />targeted to be nearly full in July, it is possible that a wet spring may force an unexpected BHBF. <br />
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