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10~1. All releases are coordinated so the releases from Turquoise Lake do not exceed the safe channel capacity of ~OO c.f.s. in Lake Fork Creek. If . more than 400 c.f.s. release is required, the excess water will be , .f released from the conservation pool of Pueblo Reservoir. Table 5 and exhibit 9 show the proposed operation of Turquoise Lake in water year 1975. Pueblo Reservoir Reservoir Inflow Inflow to Pueblo Reservoir is broken into'two'sources: (1) natural flow is considered the native flow of the Arkansas River at Pueblo Dam plus upstream reservoir water being passed downstream and (2) project water for storage in Pueblo Reservoir. Upstream reservoir water including project water sold to the South- eastern Colorado Water Conservancy District, is a small percent of the total flow of the Arkansas River at Pueblo Dam and is considered as part of the natural flow. A probability curve for the natural inflow to Pueblo Reservoir was computed by the modified California method and is shown graphically on exhibit 3. Annual inflow of a magnitude equaled or exceeded 50 percent of the time was considered the most probable inflow, that with a 90 percent chance of being equaled or exceeded was considered to be the reasonable minimum, and that with only a 10 percent chance of beint>; equaled or exceeded was considered the reasonable maximum. The annual inflow was distributed monthly according to the averages based on historical records for the years 1928-65. Minimum Reservoir Release The natural flow of the Arkansas River will be passed through the' reservoir except for that water storable by decree. Before any natural flow can be stored in Pueblo Reservoir, sufficient water must be in the Arkansas River to assure filling of the conservation pool of John Martin Reservoir and all senior rights between Pueblo Reservoir and John Martin Reservoir must be satiSfied. Project water released from Turquoise Lake to meet minimum flow in Lake Fork Creek will be stored in Pueblo Reservoir. Reservoir Operation The 12,000 acre-feet of project water, minus transportation loss, to be transferred to Pueblo Reservoir from Turquoise Lake will fill the minimum pool with about 3,400 acre-feet in the conservation pool. This water in the conservation pool will be used to meet the releases in excess of ~oo c.t.s. from, Turquoise Lake if the need should arise. Table 6 and exhibit 10 show the proposed operation of Pueblo Reservoir in water year 1975. . . 14