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. constrain the reservoir's yield if critical drought years occurred in succession. The reservoir would still be able to maintain 20,000 ac- ft in active storage during a 100-year drought unless the critical droughts were preceded by a dry year or occurred in succession. The proposed method of reservoir operation makes this possible. Since the project will derive a considerable amount of revenue from hydropower, the reservoir would be left full as much as possible. Reservoir levels would be drawn down only in dry years when the stored water is actually delivered. Therefore, if a critical drought year were preceded by an average or wet year, the reservoir would a 1 ready be fu 11 , wi th no need to capture water. I f the year following were anything other than a 100-year drought, the reservoir could be refilled even in a dry year. . Scenario II (an average rate of development) is taken as the project I s base case for water ava il abil ity and energy product ion. Figures II-I, 11-2, and 11-3 have all been based on data from Scenario II. A summary of the development conditions that would have to exist in order to fulfill the projected upstream consumptive uses and downstream demands in Scenario II follows: o Irrigated acreage upstream of Webster Hill Reservoir would have to increase by more than 15,000 acres. The total irrigated acreage has remained flat over the past 40 years. o Downstream of the reservoir, irrigated increase by more than 10,000 acres, depletion ratio of three to one. o The population upstream would have to increase by 6,500 people. lands would have to assuming a demand-to- o The population downstream would have to increase by approximately 5,000 people. o The reservoir storage upstream of completion of planned water resource increase by 15,000 surface acres. By the proj ect from the projects would have to way of perspective, the . 3686-a/6 1I-12