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2. Maximum Discharge The maximum discharge shown in column 2 is used to constrain the channel capacity below the reservoir so that he maximum release cannot exceed the constrained release in column 7. 3. Power Plant Efficiency Power plant efficiency is expressed as a percentage and is converted to a fraction during power computations. The efficiency can also be modeled as a function of head or station flow. For the first calibration of the model a constant efficiency was assumed to keep the number of variables at a minimum. As the calibration process proceeds, the efficiency will be varied to determine the sensitivity of the power operations. 4. Maximum Power Rating This table is required and is set as a constant. This is the maximum power which can be generated in any one month. HYDROSS assumes that any discharge from the reservoir will go through the power plant first; if the flow is enough to generate more than this maximum power (using the formula above), the excess flow is considered not used for generation. HYDROSS will not report generated power above this value. 5. Target Reservoir Capacity Target Capacity obtained from Randy Peterson, December 1986 (see discussion below). 6. Modified Target Capacity Modified target capacity to compensate for constrained August and September releases (see discussion below). 7. Constrained releases The Service, working with the Bureau, developed these flows to test the theory that high flows in August and September are detrimental to Squawfish larva below the Yampa confluence. These releases are currently being tested by the Bureau and are being simulated in this HYDROSS operation study. 8. Power Plant Outlet Capacity Outlet capacity as a function of head is used to calculate the tailwater elevation for power calculations. 9. tailwater Elevation tailwater elevation as a function of head. This variable can be expressed in terms of either a constant or a function of outlet capacity (column 8) flow below the dam. 11