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Last modified
8/11/2009 11:32:57 AM
Creation date
8/10/2009 4:18:50 PM
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UCREFRP
UCREFRP Catalog Number
7901
Author
Upper Colorado River Commission.
Title
Forty-Seventh Annual Report of the Upper Colorado River Commission.
USFW Year
1995.
USFW - Doc Type
Salt Lake City, Utah.
Copyright Material
NO
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<br />In 1995, Flaming Gorge was operated in accordance with the Final <br />Biological Opinion on the Operation of Flaming Gorge (FBOFGL issued in <br />November 1992. <br /> <br />The FBOFG outlines the reservoir operations during the spring, summer <br />and early fall months that may provide an improved habitat for endangered <br />endemic species of fish. To accommodate the FBOFG, a special release was <br />made from Flaming Gorge during May and June. The goal of the special <br />release in 1995 was to maintain flows on the Green River at Jensen, Utah <br />between 17,000 to 18,000 cfs. This target range was established because <br />flooding begins to occur at Jensen when flows exceed 18,500 cfs. Jensen <br />is below the confluence of the Green and Yampa Rivers, and flows from the <br />Yampa River alone in 1995 exceeded 18,000 cfs. Releases from Flaming <br />Gorge were adjusted during this special release between minimum levels of <br />BOO cfs and maximum power levels of 4,300 cfs. During the period when <br />the Yampa River reached its peak, flows from Flaming Gorge were at <br />minimum levels, producing a flow at Jensen of 19,300 cfs. <br /> <br />In 1996, Flaming Gorge will again be operated in accordance with the <br />FBOFG. If water year 1996 runoff is similar to the probable minimum, most <br />probable, or probable maximum inflow scenarios, then high spring releases <br />for three, eight, or in excess of eight weeks duration will likely be made, <br />respectively. <br /> <br />Water year 1996 will be the final year of the five-year study called for in <br />the FBOFG to further examine the flow needs of the endangered fish during <br />the spring and winter months. <br /> <br />In order to observe the effects of high spring flows in occupied habitat <br />above the Yampa-Green confluence and to produce high flows in the Jensen <br />reach of the Green River, the researchers and the Service requested a bypass <br />release from Flaming Gorge Dam. Combined with full powerplant releases, <br />the requested release totaled 8,700 cfs. The proposal met strong opposition <br />from State, county and private interests, particularly those living along the <br />river who would be adversely impacted by the flows through increased power <br />costs, farmland flooding, trout habitat degradation and recreation disruption <br />and facility degradation. <br /> <br />In response to this opposition, the Service withdrew its request for 1996. <br />It has also resumed informational discussions in the Flaming Gorge Work <br />Group and elsewhere in an effort to explain the need for these high releases <br />for research, seek consensus on the long-term operation of the dam and gain <br />support for recovery efforts. The issue of high spring flows and powerplant <br />bypasses will likely continue to be a controversial topic for work group meet- <br />ings. <br /> <br />62 <br />
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