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.-I r- c - c. " losses from the present rate of 50 percent to an estimated rate of 20 percent would result in a saving of 885 acre-feet of surface lV2.ter o.nnually. 21. Water requirements at the farm are estimated to be 2.20 acre-feet per acre for diversified crops; the div.)rsion demand under the plan would be 2.75 acre-feet l~r acre, With losses at 20 percent after project development, a diversion of approximately 7,000 acre- feet would be required for full irrigation of the 2,538 acres of the District, 22. Reservoir opero.tion studies, based on the period 1932 through 1943 and the assumption that the prior rights of the 'City of Prescott to 600 acre-feet would be completely satisfied, indicate that an aver- age of 2,950 Clcre-feet would be aVClilable- mmually at the reservoirs. There would be occasional water shortages, the lnrgest of which would be 55 percent. It is estimated that 1,450 acre-feet of groundvmter can be recovered by operating the:pump for six months each yeo.r. A total of 4,400 acre-feet of water, therefore, can be made available. With a diversion demand of 2.75 acro-feet per acre, 4,400 acre-feet would adequately irrigate 1,600 acres. Even with the development, therefore, the project wator supply would be inadequate for the entire 2,538 acres of land under irrigation in the project. 23. Development of additional groundwater does not appear feasible for several reasons. High cost of electric energy causes the cost of pumping from the present groundwater level to approach closely the ability of farmers to pay for water. Exploitation of the groundwater of the basin, which has no legal restraint in the State of Arizona, is now in progress and the wo.ter level is declin- ing. The District well is located near the upper-edge of the basin and therefore, being in a less favorable position, the District would undoubtedly be among the first to be forced to discontinue pumping. 24. The estimate of cost of construction under this plan is based on the actual cost of furniShing, placing, and backfilling 36-inch.concrete pipe in the-District in 1944. On this basis, com- plete installation of the 53.444 linear feet of concrete pipe required for replacing the main canal is estimated to cost $133,610. Repayment of this amount in 40 years without interest would require an arlnual payment by the District-of $3.340.25, which would amount to ~1.32 per acre annually for the 2~538 acres assessed in the bistrict. ~: i' (, 25. The cost of pumping for six months each year, based on the rate being paid for electric energy is estimated to be $5,243 annually or J2.07'per acre for the 2,538 acres of land under irrigation in the District. Costs 26. Operation and maintenance costs after development "~uld be expected to remain approximately the same as the normal for recent 5