My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
WSP09925
CWCB
>
Water Supply Protection
>
Backfile
>
9001-10000
>
WSP09925
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
1/26/2010 2:56:32 PM
Creation date
10/12/2006 4:01:38 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
822.600.10
Description
Colorado River Annual Operating Plan - Annual Reports
Basin
Colorado Mainstem
Date
1/1/1999
Author
USDOI/BOR
Title
Annual Operating Plan
Water Supply Pro - Doc Type
Annual Report
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
50
PDF
Print
Pages to print
Enter page numbers and/or page ranges separated by commas. For example, 1,3,5-12.
After downloading, print the document using a PDF reader (e.g. Adobe Reader).
Show annotations
View images
View plain text
<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />Releases above 113 cubic meters per second (4,000 cfs) were made during much of June. No <br />flooding occurred in the city of Green River, Wyoming, located 60 river miles below the dam. <br />The flood stage is exceeded when flows at Green River exceed 354 cubic meters per second <br />(12,500 cfs). Fontenelle Reservoir essentially filled in July of 1998 when the elevation of the <br />reservoir came within 0.12 meters (0.4 feet) ofreaching the crest of the spillway. <br /> <br />Because the mean annual inflow of 1,516 MCM (1.229 MAF) far exceeds Fontenelle's storage <br />capacity of 426 MCM (.345 MAF), significant power plant bypasses are expected under the most <br />probable and maximum probable inflow scenarios. Additionally, there is little chance that the <br />reservoir will not fill during water year 1999. In order to minimize spring high releases, and to <br />maximize downstream resources and power production, the reservoir will probably be drawn <br />down to minimum pool elevation, 1970.0 meters (6463 feet) which corresponds to a volume of <br />115 MCM (0.093 MAF) of live storage. <br /> <br />Flaming Gorge Reservoir <br /> <br />Unregulated April through July inflow into Flaming Gorge in water year 1998 was 1,800 MCM <br />(1.459 MAF) or 122 percent of normal. Summer inflow was unusually high with July and <br />August inflows being 163 and 144 percent of average respectively. Flaming Gorge Reservoir , <br />/' <br />reached a peak elevation of 6037.9 feet on August 12. The last time the reservoir reached this ./' <br />level was in 1984. . <br /> <br />During the operation of the powerplant in 1997,.a failure occurred in one of the bypass tubes, <br />causing flooding of the powerplant and a shutdown of the generators. While electrical damage <br />to the generators was quickly repaired, the steel liner and surrounding concrete of the outlet tube <br />suffered significant damage. Repairs were not completed until June 1998, and the spring <br />operation of Flaming Gorge had only the powerplant and the spillway available for use. Since <br />spillway release temperatures in the months following June would have been much higher than <br />powerplant release temperatures, potential emergency actions were closely coordinated with <br />natural resource management interests to minimize adverse ecological impacts should the <br />powerplant generators cease to function. Fortunately, no spillway releases were required during <br />water year 1998. <br /> <br />In 1998, Flaming Gorge was operated in accordance with the Biological Opinion on the / <br />Operation of Flaming Gorge (BOFG), issued in November 1992. The BOFG outlines the <br />reservoir operations which may provide an improved habitat for endangered endemic species of <br />fish. Accordingly, a 3-week release ofthe maximum powerplant capacity of 130 cubic meters <br />per second (4,600 cfs) was made during late-May through mid-June. This was expected to be <br />followed by gradually decreasing releases until mid-summer flows of34 cubic meters per second <br />(1,200 cfs) were reached. However, the unexpected high flows in July and Augustre uired the <br />release of 82 cubic meters per second (2,900 cst oug early August and 68 cubic meters per <br />second (2,400 cfs) for the remainder of the water year. <br /> <br />8 <br />
The URL can be used to link to this page
Your browser does not support the video tag.