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I I The conclusions drawn from the study are summarized as follows: I I 1. The ideal water requirement for irrigation in the project area is 21,800 acre feet annually. Presently, a shortage of about 33 percent of irrigation has been reported by the irriga- tors. Based on this reported figure the annual amount of short- age in the system is estimated to be about 7,200 acre feet. I I 2. The results of the simulated reservoir operation study for a continuous period of 25 years (1941-1965) show that with the existing live storage capacity (8,000 acre feet) of Gould Reser- voir (1) by routing all flows including the Cattleman's Ditch and the Fruitland Mesa Ditch through the reservoir storage, and (2) by using return flows collected from the service areas within the system, the amount of average annual shortage over the period of study would be about 4,030 acre feet. The irrigation firmness in the project areas would vary from a minimum of 52.8 percent in areas above the reservoir to 87.2 percent in areas below the reservoir. This condition of water shortage being less than that presently reported by the irrigators could be achieved without enlarging the size of the reservoir but by adjusting the convey- ance and the diversion system, storing all water from above the reservoir and then releasing it on demand for areas below the reservoir. I I I I I I I I I I 3. By raising the height of the dam by about 12 feet and thereby increasing the storage capacity of the reservoir to 12,000 acre feet, the average annual shortage in the system would reduce from 4,030 acre feet under conditions of (2) above to 2,240 acre feet. The shortage that would be eliminated in this case is the criti- cal shortage presently occurring during the latter part of the irrigation season. Consequently, the irrigation firmness in areas below Gould Reservoir would improve considerably. . I I I