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Last modified
1/26/2010 2:21:07 PM
Creation date
10/12/2006 1:25:12 AM
Metadata
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Template:
Water Supply Protection
File Number
8282.600.40
Description
Colorado River Annual Operations Reports
Basin
Colorado Mainstem
Date
1/1/2000
Author
USDOI/BOR
Title
Colorado River Reservoir Operation Status Reports Part 1
Water Supply Pro - Doc Type
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<br />Some hour to hour fluctuations in releases are now occurring. The amount of fluctuation is being <br />constrained by the 1992 Flaming Gorge Biological Opinion (FGBO) which states that flows <br />on the Green River near Jensen, Utall shall change by no more than plus or minus 12.5 percent of the <br />daily average flow for the day. Generally, the range (high to low) of fluctuations at Flaming Gorge <br />has been about 1000 cfs on any given day. <br /> <br />Open forum discussions on Flaming Gorge operations have been taking place at meetings of the <br />"Flaming Gorge Working Group". The next Working Group meeting is scheduled for April 13 at I <br />pm in Vernal, UT. For more information on the Working Group, contact Ed Vidmar at <br />801-379-1000. <br /> <br />ASPINALL - January unregulated inflow into Blue Mesa was 27,000 acre-feet or 110 percent of <br />average. Precipitation in the Gunnison basin was 130 percent of average for January. The basin <br />snowpack is averaging about 58 percent of normal for February 7, 2000. Currently the inflow rate <br />into Blue Mesa Reservoir is averaging about 350 cfs and reservoir releases are averaging about 700 <br />cfs. Blue Mesa's current elevation is 7488.09 feet which corresponds to a storage content of about <br />567,000 acre-feet. <br /> <br />. Releases from Crystal Dam are currently 800 cfs. With the snowpack being lower than normal, the <br />current National Weather Service forecast for April through July runoff is only 61 percent of <br />average. In response to this forecast releases from Crystal will be reduced by 100 cfs down to 700 <br />cfs. If the persistent dry trend continues this release rate may be reduced even more. <br /> <br />The meeting of the "Aspinall Unit Working Group" was held January 31,2000 in Montrose, <br />Colorado. At this meeting, review of last summer and fall operations, and plans for winter and <br />spring 2000 operations were discussed. These meetings are open forum discussions on the Aspinall <br />Unit reservoir operations with many interested groups participating. Anyone needing further <br />information about these meetings should contact Ed Warner in the Grand Junction Area Office at <br />(970) 248-0654. <br /> <br />NA VA TO - January unregulated inflow into Navajo was 13,500 acre-feet or 59 percent of normal. <br />Precipitation for the month was near 100 percent of normal. The current snowpack in the basin is <br />only 27 percent of normal for the Upper San Juan and 32 percent of normal for the Animas river <br />basins. The latest April through July forecast is for 250,000 acre-feet, or about 32 percent of normal <br />runoff. The current reservoir inflow is about 200 cfs and the water surface elevation is 6069.79 feet <br />which corresponds to a reservoir content of about 1,478,000 acre-feet. All reservoir releases are <br />being made through the powerplant and are currently at 500 cfs. This release rate will remain at this <br />level through the winter months and into Spring. Currently, with the low runoff forecast, it looks <br />like there will be no Spring peak. hydrograph release for endangered fish this season. <br /> <br />The Bureau of Reclamation held a public meeting on Navajo Reservoir operations on February 3, <br />2000 in Fannington, New Mexico. At this meeting, review of last summer and fall operations, and <br />plans for this winter and spring 2000 operations were discussed. These are open forum discussions <br />on the operation of Navajo Reservoir with many interested groups participating. The next meeting is <br />scheduled for April 17, 2000 in Farmington. Anyone interested in the general operation of the <br />
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