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Last modified
1/26/2010 4:34:15 PM
Creation date
3/25/2008 3:17:42 PM
Metadata
Fields
Template:
Water Supply Protection
File Number
8282.600.40
Description
Colorado River AOP Status Report
Basin
Colorado Mainstem
Author
USDOI/BOR
Title
Colorado River Reservoir Operations Status Reports Partial Part 2 2004, with staff comments
Water Supply Pro - Doc Type
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<br />months projected elevation for April 1st, 2005. At this time no changes have been made to the <br />projected releases but this may be considered if conditions continue to become wetter in the coming <br />months. Releases are currently 800 cfs and are projected to remain at this level until May of2005. <br /> <br />The next "Flaming Gorge Working Group" meeting is to be held on April 21st, 2005 in Vernal, Utah <br />at 10:00 a.m.. The location will be at the Western Park Convention Center. The Working Group is a <br />forum for information exchange between Reclamation and all other parties associated with the <br />operation of Flaming Gorge Reservoir. The public is encouraged to attend and express their concerns <br />and interests with regard to the operation of Flaming Gorge Reservoir. For more information about <br />the Working Group please contact Ed Vidmar at 801-379-1182. <br /> <br />ASPINALL - October unregulated inflow into Blue Mesa Reservoir was 29,000 acre-feet or 79 <br />percent of average. Hydrologic conditions remain dry with drought still the controlling factor for <br />water management throughout the region; however, the last two months were much above average <br />precipitation. September recorded precipitation was 165 percent of average, while October's <br />precipitation was 120 percent of average. Average stream flow is still much below normal and will <br />most likely stay that way until next spring's runoff. The current inflow rate into Blue Mesa <br />Reservoir is about 350 cfs and reservoir releases are averaging about 300 cfs. Blue Mesa's present <br />elevation is 7476.69 feet, which corresponds to a storage content of about 482,000 acre-feet. <br /> <br />On November 1, 2004, the National Weather Service's River Forecast Center issued the forecasted <br />inflow over the next 3 months for continued below normal conditions. The unregulated inflow <br />forecast for November, December and January is 63,000 acre-feet which is 76% of normal for these <br />months. Based on this forecast, Blue Mesa Reservoir elevation is estimated to increase 1.6 feet to <br />elevation 7478.3 feet or about 11,500 acre-feet by the end of January 2005. <br /> <br />Releases from Crystal are currently set at 350 cfs. The Gunnison Diversion Tunnel has been shut <br />down for the winter season with the exception of some small 1 00 cfs diversions taken bi-weekly for <br />municipal water needs in Montrose, Colorado. Due to the severity of the continuing drought in the <br />Gunnison River Basin, river flows through the Black Canyon ofthe Gunnison have been set close to <br />the minimum flow rate. Current flows in the river are now 350 cfs. This flow rate will most likely <br />be kept at this level for much of this fall and winter months. <br /> <br />The next meeting ofthe "Aspinall Unit Working Group" will be held on Thursday, January 20,2005 <br />at 1 :00 PM at the Pavilion Center in Montrose, Colorado, review of last summer and fall reservoir <br />operations, and plans for this winter and next spring 2005 operations will be discussed. These <br />meetings are open forum discussions on the Aspinall Unit reservoir operations with many interested <br />groups participating. Anyone needing further information about these meetings should contact Dan <br />Crabtree in the Grand Junction Area Office at (970) 248-0652. <br /> <br />NA VAJO - Reclamation decreased the release from Navajo Reservoir from 350 cubic feet per <br />second (cfs) to 250 cfs, at 9:00 a.m. on Monday, November 1, 2004. This release will remain at 250 <br />cfs throughout the winter, or until further notice. Releases are made for the authorized purposes of <br />the Navajo Unit, and to attempt to maintain a target base flow through the endangered fish critical <br />habitat reach ofthe San Juan River (Farmington to Lake Powell). <br /> <br />Based upon current hydrological conditions and historical hydrologic data, the target base flow <br />should remain above 500 cfs through the critical habitat area. The target base flow is calculated as <br />the weekly average of gaged flows throughout the critical habitat area, therefore daily flows of less <br />
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