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I, FLAMING GORGE RESERVOIR (GREEN RIVER) Water Year 1992 The elevation of Flaming Gorge Reservoir at the beginning of water year 1992 was 6031.1 feet with 3,389,300 acre-feet oflive storage (90 percent of capacity). At the end of the water year, the elevation was 6023.6 feet. Live storage on September 30, 1992 was 3,106,204 acre-feet (83 percent of capacity). AI; with other drainage areas in the Upper Colorado River Basin, precipitation in the Green River Basin was near normal, but the quantity of runoff was reduced due to the dry . antecedent conditions of the basin. Unregulated inflow into Flaming Gorge Reservoir for water year 1992 was 772,OCXJ acre-feet, 47 percent of normal. Actual regulated inflow was 851,OCXJ acre-feet. ACTUAL RELEASES 1992 THOUSAND ACRE-FEET 3 00 50 00 so ,/' 1\ / c::::: 7 \ v so 2 2 o &7' +o~ q~'" ~.t 4<-" +..'1- .;J'I- +~ f'+ f''' ~<> ..<3 A Final Draft Biological Opinion (FDBO) from tbe FISh and Wildlife Service on the operation of Flaming Gorge Reservoir was issued in February of 1992. The FD BO outlined how the reservoir should be operated during the spring, summer, and early faU months in order to provide better habitat for endangered endemic species of fish. The FDBO requires 5 years of additional studies to determine the flow needs of the endangered fISh during the spring and winter months. In 1992, Flaming Gorge was operated in accordance with the FDBO by making a 4,200 cubic feet per second release for 1 week in May and by maintaining a flow of between 1,350 and 1,800 cubic feet per second at the Green River near Jensen, Utah, gaging station during the summer and early fall. FLAMING GORGE RESERVOIR Reservoir Acre-feet Elevation, feet Storage Capacity Rated Head Minimum Power Surface Area, fuU Reservoir Length, fuU 3,749,OCXJ 1,062,OCXJ 233,OCXJ 6040 5946 5871 42,020 Acres 91 Miles Powerplant Number of Units Total Capacity 3 108,OCXJ KW 7