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reflect the diversion and return flows of established water Consequently, those records were used to determine the quantity of available dul'ing any time increment within the hydrologic period. user's. wat.er m I I I I I I II I , ,I I I I I I I I I I operation of the water rights at their original The new site must then be operated in a manner impacts on the river. site must that wi 11 be determined. produce similar The evaluation of the available water data and the selection of streamflow records as being representative of a' long-term hydrologic were discussed in previous chapters. Those streamflow records 1953..79 per'i od a 1 ready Assumptions and Criteria A number of assumptions and general operating rules were developed as guidelines fc,r simulating the operation of the facilities in the three alternative plans. Those criteria are presented in the following sections. Decreed Diversion and Storage The initial requirement for the operation studies was to quantify the water available for diversion and storage at the locations designated in the 1966 YJWCD water right decrees. Figure Vol shows the general location of all the absolute and conditional water rights in the Upper White River Basin that are senior to the YJWCD's 1966 conditional rights. Figure V-I also shows the YJWCD's 1966 storage rights at Ripple Reservoir and Lost Park Reservoir. T1e location of the YJWCD 1966 direct flow right is on the Nort.h Fork of the Wlite River below the Ute Creek inflow. These original water rights locations were used as the base control in determining the water available for storage or diversion under the YJWCD senior water right. Base case computat 'j ons were fi rst made assumi ng that the tot a 1 87,530 acre-foot annual demand was diverted at the decreed diversion point and that the Ripple and Lo~;t Park Reservoirs would release water as needed to meet the delivery system requirements. V-2