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I I I I I I I I I I I I I I I I I I I I O:\".,~., .J0v"';"'t mention of the inactive storage amount below this level. A maximum head of 110 feet (Elevation 6090 feet) was also assumed. According to Western Engineers, Inc., the amount of active storage available in the power pool between Elevation 6050 feet and Elevation 6090 feet was determined to be 163,000 AF. For this study, the approach used by Western Engineers, Inc. was implemented but a total active storage of 164,690 AF was used in the WIRSOS modeling. In the modeling, it was assumed the dead and inactive storage below the 70 foot head level is inviolate with reservoir releases drawn from only the 164,690 AF of active storage. The inactive storage amount was estimated at 57,000 acre-feet. An area-capacity curve for Little Snake Reservoir was developed from mapping obtained from CRWCD (see Appendix C). WIRSOS uses this information to calculate reservoir evaporation losses. Project demands to be modeled include direct flow bypasses and storage releases through the Powder Wash Power Plant for hydroelectric power generation. Flows in the Little Snake River are erratic and vary from year to year. Under actual operations, flows through the turbines would also vary. However, WIRSOS is not capable of modeling demands that change from year to year. Therefore, the system was modeled, to the extent that WIRSOS will permit, such that Little Snake Reservoir fills as of June 1 followed by a constant discharge through the turbines such that the reservoir is at minimum storage as of April 1 of the following year. The conditional water right amount for the Powder Wash Power Plant provides for 800 cfs to be supplied by the Little Snake River and Little Snake Reservoir storage 29