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these demands based on actual 10825 needs and implemented options. The operations model <br />period was divided into Wet and Dry years, or "No Release" and "Fish Release" years. <br />4. Power Demand <br />The power demand was sized to use all of the annual demand not required for the other three <br />types of demands. This demand was modeled as uniform throughout the year. <br />5. Combined Demand <br />An example composite demand on the large reservoir (Alignment 1), assuming releases of <br />150,000 af/yr, is shown in Figure 9. In wet and above average years, the Fish Release (salmon <br />color) is not made. The shape of the composite demand pattern and the proportion assigned to <br />each use in a given month vary with the annualized demand, because irrigation use is always <br />preserved, regardless of the yield being tested. <br />Figure 9. Modeled Demand for Grand Valley Lake (Large Reservoir) Operations Analysis <br />Demand Pattern (150,000 af Yield) <br />40,000 <br />35,000 <br />30,000 <br />25,000 <br />� <br />� 20,000 <br />v <br />� <br />� 15,000 <br />10,000 <br />5,000 <br />0 <br />41 <br />AECOM <br />2/22/10 <br />