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\.\1& The ~ration Plan for Water Year 1978 Western Slope Collection System There are six diversion points COllpleted on the western slope: Sawyer Creek, ChapllaIl Gulch, South Fork of the Fryingpan River, Fryingpan River at Marten Creek, Lily Pad, and Ivanhoe Creek. I TranSllCuntain diversions at these points will be regulated to the end '!that no diversions will be nade that will reduce remaining aggregate streamflows to less than tinse minimum standards contained in the Fryingpan-Arkansas Project Operating Principles. For planning purposes, data from the collection system yield and sizing studies were used to detennined the diversions in 1978. The 10-, 50-, and 90-percent chance values were obtained from the probability curve shown on Exhibit 2 and are considered to represent the reasonable minimum, IlOst probable, and reasonable maxi.rnqm diversions, respectively. It is intended that, throughout the year, al1l water that is physically available al:x:>ve the minimum bypass requirenrarits will be diverted. . Reservoirs (General) Three detailed IlOnthly operations studies have been rrade which simulate the proposed operation of Ruedi Reservoir, Turquoise Lake, and Pueblo Reservoir. 'l'I<t:> of the studies simulate operations with extrerrely high and elct:renely low water supply oonditons. ~servoir inflow in 1978 has a l-in-10 chance of being less than the reasbnable minimum, and a l-in- 10 chance of being greater than the reasonatlle maximum. Therefore, actual operations in 1978 have a 8-in-lO chance of falling between the limits of the extrene conditions. The third study simulates operations with IlOst probable water supply ronditions. . In preparing the operation studies, it was intended to provide the necessary flexibility to change from one set of rondi tions to another. The ever-changing situation regarding inflO\'lS, downstream requirE!l'ents, etc., will require =y adjUStIrents. ~ration schedules will be adjusted as required. Forecasts of the April throug/1 July reservoir inflow will be started on March 1, 1978, and continue on the first of each succeeding. IlOnth through May 1. Rlledi Reservoir Reservoir Inflow Inflow to Ruedi Reservoir is considered to! be the flow of the Fryingpan River at Rlledi, Colorado. Rerords are available at this station for October 1959 through September 1964. For kter years 1965 through May 1968, discharge at the gaging station on the Fryingpan River near Rlledi, Colorado, is corrected for Rocky Fork Creek flqw and used as Fryingpan River flow at Ruedi, Colorado. Rocky Fork Creek flow was estimated from . 8