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To solve this problem, results from Trials 8 and 9 were reviewed and a year by year (staged table) was developed to curtail constraints in wet and dry years. This again limited the ability of the model to do "what if" studies. Trial 10 represents the current operational setup for Flaming Gorge as of the writing of this report (March 1987). At this point in development we plan to continue testing the model to make the operations as sound as possible while preserving the flexibility to model different operational scenarios. Below Flaming Gorge, the Yampa and Duchesne Rivers have been modeled and documentation prepared as a part of the Stagecoach Biological Opinion and is not included in this report. The White River has been modeled in HYDROSS and has been calibrated. Documentation was included in previous reports to the Colorado River Hydrological sub-committee. The operation of Taylor Draw Reservoir, which was constructed on the White River in 1984, has not been documented. The following section of this report describes the HYDROSS setup and operation of Taylor Draw Reservoir. TAYLOR DRAW RESERVOIR OPERATION The operation of Taylor Draw Reservoir (locally known as Kenney Reservoir) was modeled using information contained in the biological assessment and the Federal Energy Regulation Commission Application for the Taylor Draw Hydroelectric Station. Taylor Draw Reservoir is a relatively small reservoir in relation to Fontenelle and Flaming Gorge. The Reservoir is situated on the White River near Rangely, Colorado, and was constructed and operated by the Colorado River Water Conservation District and a local water users association. The operation of the Reservoir is relatively straight forward in that the Reservoir is designed to fill annually and spill all inflow in excess of the Reservoir contents. The only variables are depletions from the Reservoir in the form of evaporation and diversions for municipal use by the City of Rangely. The following tables were used to simulate Taylor Draw Reservoir. 26