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.', ''it """ ,"'"'~ t:J~.': . The Operating Plan for the 1973 Water Year Three detailed monthly operation studies have been made which simu- late the proposed operation of Ruedi Reservoir and Turquoise Lake. Two of the studies simulate operations with extremely high or extreme- ly low water supply conditions. Reservoir inflow in 1973 has a l-in- 10 chance of being less than the reasonable minimum and a l-in-10 chance of being greater than reasonable maximum. Therefore, actual operations in 1973 have an 8-in-10 chance of falling between the limits of the extreme studies. The third study simulates operations with most probable water supply conditions. In preparing the operation studies, it was intended to provide the necessary flexibility to change from one set of conditions to another. The ever-changing situation regarding inflows, downstream requirement, etc., will require many adjustments. Operation schedUles will be ad- justed as required. Forecasts of the April through July reservoir inflow will be started on March 1, 1973, and continue on the first of each succeeding month through May 1. Ruedi Reservoir . Operation of Ruedi Reservoir through November 15 is in compliance with a request by U. S. Fish and Wildlife Service representatives. After a three day release of 400 c.f.s. to flush :fines from the redds, releases from the reservoir are to be held to 100 c.f.s. for the period October 4 through November 15. Then, in order to provide maxi- mum flood protection below the dam, the reservoir will be drawn down by March 31 to a point where refilling would be assured under reason- able minimum inflow conditions, theoretically to 56,900 acre-feet. In actual practice, an estimate of probable inflow would be made early in March based on March 1 snow forecast, and draw down would be adjust- ed accordingly. West slope recreation interests requested that the reservoir water level not be dra>ln down below elevation 7706.0 (53,122 acre-feet) which is one foot above the base of the Forest Service boat ramp. Un- der reasonable maximum inflow conditions, the reservoir would theoret- ically be drawn down to this capacity. However, under reasonable minimum and most probable inflow conditions the lowest reservoir water level would be somewhat above this elevation. In each case, the reser- voir would fill by the first of July to provide optimum recreation benefits during the summer months. After July 1 operation plans call for drawing the reservoir down to a point 2 feet below the spillway crest and holding at this state until . 16