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':1.. "0, . . Of the 252 consecutive months analyzed some water was available in 146 months, which is about 58 percent of the time. One-thousand acre-feet could have been stored during almost 36 percent of the time, which is better than once every third month. To store 5,000 acre-feet in 1 month would have been possible about 8 percent of the time or almost once a year. To put the above storage potentials in proper perspective--in the record analyzed no water was available for storage during a sequence of 21 consecutive months and two sequences of 16 months each. There was also a 24-month period with 1 month showing available water and that only to the extent of 34 acre-feet. These findings clearly point to the necessity of a careful carryover policy in operating the storage space in the future, particularly from the standpoint of any evaporation makeup water that will be one parameter of the storage operation. To aid in computation or the development of storage/use scenarios, Fig. 2 is included to show the stage content and stage surface area curves above the multi-purpose pool (eleva- tion 5558 ft. msl). The relatively small consecutive monthly quantities that appear in 1963, 1966-67, late 1971 and early 1972, 1975-76, and again in 1976-77 show a good probability of periodically recovering evaporation losses and also storage of some water for later beneficial use. To quantify the potential annual yield that could be expected out of this storage project, different storage/use scenarios should be developed. These then should be modeled over the 21-year period in accordance with the flood control operation and the recreational objectives of the facility. These scenarios should consider the different uses this water could be put to, such as augmentation, recharge at various locations, or direct deliver- ies to District farms as supplemental supply. RE:C)OURCE: CONc)ULT~NTc) INC 3