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WSPC12731
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Last modified
1/26/2010 4:34:16 PM
Creation date
3/27/2008 10:59:40 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8282.600.40
Description
Colorado River AOP Status Report
Basin
Colorado Mainstem
Date
6/7/2000
Author
USDOI/BOR
Title
Colorado River Reservoir Operations Status Report June 2000, with staff comments
Water Supply Pro - Doc Type
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<br />The current reservoir inflow is about- 2,000 cfs' and the water surface elevation is 6074.61 feet which <br />corresponds to a reservoir content of about 1,546,000 acre-feet. Reservoir releases are currently <br />3,000 cfs. The 5,000 cfs peak occurred on June 5, and releases are being sc~ed back each day. A <br />base flow release of 500 cfs will be reached on June 12. This base flow release rate will then be held <br />steady for the rest of the summer months and fall months. <br /> <br />A public meeting on Navajo Reservoir operations will held on Tuesday, August 22 at 1:00 pm in <br />Farmington, New Mexico. At this meeting, review of last spring and summer operations, and plans <br />for this fall 2000 operations will be discussed. These are open forum discussions on the operation of <br />Navajo Reservoir with many interested groups participating. Anyone interested in the general <br />operation of the reservoir is encouraged to attend. For further information about these meetings or <br />the daily operations of Navajo Reservoir please contact Ed Warner in Reclamation's Grand Junction <br />Office at (970) 248-0654. <br /> <br />G/im Canvon Dam - The National Weather Service's inflow forecast for A ril through July <br />unregulated flows toLake Powell is 5.4 million acre-feet (70 percent of average). Inflow to Lake <br />Powell in May was 75 percent of average. <br /> <br />Test releases from Glen Canyon Dam are now in progress. These test releases began in April and <br />will continue through the end of September. These test releases are for the benefit of endangered <br />humpback chub in the Grand Canyon and will assist in compliance with the Endangered Species Act. <br /> <br />Releases, as part of this test, were relatively high during April and May of 2000. From April 8 <br />through the end of April releases were 17,000 cfs. During May, releases were increased to power <br />plant capacity for 4 days (May 4-7). However, releases during most of May were in the 17,000 to <br />19,000 cfs range. Releases were reduced to 13,500 cfs the last 4 days' of May. .Releases from Glen <br />Canyon were at these relatively high levels during May to create ponding at the confluence between <br />the Little Colorado and Colorado Rivers, a condition considered to be favorable for creation of a <br />favorable spawning environment for humpback chubs. <br /> <br />Releases from Glen Canyon were reduced to 8,000 cfs on June 1, 2 . Releases are scheduled to <br />remam a is level for June, July, ugus an most 0 eptem r. These low steady summer flows <br />are an important component in this year's test releases for native fish. These low stable flows are <br />theorized to assist in the summer survival and growth of young humpback chubs. <br /> <br />Additional information on low summer steady flows at <br />Glen Canyon can be found at www.uc.usbr.gov/pao/lowflow.html. <br />
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