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Last modified
1/26/2010 2:27:39 PM
Creation date
10/12/2006 2:25:58 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
822.600.10
Description
Colorado River Annual Operating Plan - Annual Reports
Basin
Colorado Mainstem
Date
1/1/1998
Author
USDOI/BOR
Title
Annual Operating Plan
Water Supply Pro - Doc Type
Annual Report
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<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 />flows to the Green River. By midnight of June 21, the river was flowing a stable 113 cubic <br />meters per second (4000 cfs) with 56.6 cubic meters per second (2000 cfs) being released from <br />the spillway and 56.6 cubic meters per second (2000 cfs) being released from the remaining <br />operational bypass tube. <br /> <br />Significant work was performed in the latter part of June to put the power plant back on line. <br />By June 29, damaged components in the Flaming Gorge generators had been repaired or <br />replaced, and all three of the generating units were up and running. The damaged bypass tube <br />will be repaired during water year 1998. <br /> <br />In 1997, 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 <br />of fish. Late summer and early fall flows in 1997 differed from those recommended in the <br />BOFG, however. The BOFG calls for releases to be made during this time period so as to <br />achieve a target flow of34 to 51 cubic meters per second (1200 to 1800 cfs) on the Green River <br />near Jensen. In 1997, however, a target flow of71 cubic meters per second (2500 cfs) was used. <br />This change in operation was made in consultation with the Fish and Wildlife Service. <br /> <br />In water year 1998, Flaming Gorge will again be operated in accordance with the BOFG. A <br />revised biological opinion on the operation of Flaming Gorge Dam is due out in December <br />1997. This revised opinion will likely describe specific constraints during the spring and winter <br />seasons, but may also refine the constraints for the entire year. <br /> <br />Blue Mesa, Morrow Point, and Crystal Reservoirs (Aspinall Unit) <br /> <br />In water year 1997 the April through July unregulated runoff into Blue Mesa Reservoir was <br />1,310 MCM (1.062 MAF) or 152 percent of average. Water year 1997 unregulated inflow was <br />1,750 MCM (1.419 MAP) or 146 percent of average. Water year 1997 power plant bypasses <br />were approximately 587 MCM (0.476 MAF) at Crystal. Releases and spills up to 153 cms <br />(5,400 cfs) occurred at Crystal with flows in the river below the tunnel in excess of 133 cms <br />(4,700 cfs). Blue Mesa filled easily during water year 1997. <br /> <br />Section 7 consultation with the Fish and Wildlife Service on the operation of the Aspinall Unit <br />continued in 1997. As part of this consultation, a five-year effort to study the effect of various <br />release patterns on habitat, reproductive success, and reintroduction of endangered fish in the <br />Gunnison River is underway. <br /> <br />Additionally, the Aspinall Unit was operated as if the draft contract between Reclamation, the <br />National Park Service, and the State of Colorado to deliver water from the Aspinall Unit to the <br />Black Canyon of the Gunnison National Monument were in place. The operation was also <br />coordinated with the Fish and Wildlife Service and others interested in the operation of the <br />Aspinall Unit. <br /> <br />9 <br />
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