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<br />FLAMING GORGE RESERVOIR <br />(GREEN RIVER) <br /> <br /> <br />Water Year 1989 <br /> <br />As a result of several extremely dry years in the Green River <br />Basin, Flaming Gorge Reservoir has been drawn down about <br />20 feet from full capacity, Releases during most of water year <br />1989 were restricted to minimum flows of about 800 ds, <br /> <br />Flaming Gorge Reservoir started water year 1989 at elevation <br />6023.4 feet with an active storage of 3,098,000 acre-feet. <br />Releases from Flaming Gorge Dam for water year 1989 were <br />projected to, be 840,000 acre-feet for the most probable <br />operating plan based on the October forecast of an <br />unregulated inflow of 1.35 maf. <br /> <br />Flaming Gorge Reservoir was gradually drawn down to <br />elevation 6019.5 feet by January 1, 1989. The forecast of April <br />through July runoff made on January 1, 1989. was 1.02maf or <br />88 percent of the long-term average, Powerplant releases for <br />January and February averaged 1,000 ds, On March 1, 1989, <br />the April through July forecast had decreased to 980,000 <br />acre-feet, or 77 percent of average, Thc main spring runoff <br />occurred during the middle of May with powerplant releases <br />held at about 1,000 ds, Releases for June averaged about 1,300 <br />cfs and then were decreased to 850 dsfor July. Forthe months <br />of August and September, releases were increased to an <br /> <br />ACTUAL RELEASES <br /> <br />WY 1989 <br /> <br />1GQoaF. <br />. <br /> <br />. <br /> <br />. <br /> <br /> <br />. <br /> <br />NDJFMAMJJASO <br /> <br />average daily flow of 1,200 ds, Flaming Gorge reached a <br />maximum elevation of 6019,66 on May 30 with a storage of <br />approximately 2,96 maf. or 84 percent of reservoir capacity, <br /> <br />Specific releases for research and data collection for studies <br />concerning endangered fish survival requirements were <br />provided in 1989, Releases from Flaming Gorge Dam have <br />been limited to a maximum of 2,600 ds during the months of <br />August and September to test the effect of releases on <br />endangered Colorado Squawfish, This species is currently <br />being studied as part of the Recovery Implementation <br />Program in the Upper Colorado River Basin and the <br />restricted summer flows are thought to enhance the <br />downstream habitat of the fish, <br /> <br />The actual April through July unregulated runoff into Flaming <br />Gorge Reservoir was 589,000 acre-feet or 48 percent of <br />average, The peak inflow was 2.735 ds, occurring on April 15, <br />The total unregulated inflow for water year 1989 was 903,000 <br />acre-feet, or 60 percent of the long-term average. Total <br />releases for the water year were 712,000 acre-feet, aU of which <br />passed through the powerplant. The spillway was not used. <br /> <br />FLAMING GORGE RESERVOIR <br /> <br />ResetVoir <br /> <br />Acre-feet <br /> <br />Elevation, feet <br /> <br />Maximum Storage <br />Rated Head <br />Minimum Power <br />Surface Area, full <br />Reservoir Length, full <br /> <br />3,749,000 <br />1,062,000 <br />233,000 <br /> <br />6,040 <br />5,946 <br />5,871 <br />42,020 Acres <br />91 Miles <br /> <br />Powerplant <br /> <br />Number of Units <br />Total Capacity <br /> <br />3 <br />lO8,OOO KW <br /> <br />7 <br />