Appraisal Report Central Arizona Project

Document: "Appraisal Report Central Arizona Project-Chapter III", January 1962, page 35and on the Salt-Gila Aqueduct would be able to adjust minor variations in demand rate and develop the highest efficiency of the aqueduct. From the augmented supply applied as irrigation water there would be deep percolation to the ground-water basins, increasing the safe yield under project conditions. With the additional municipal and industrial uses, effluent flows from project sources would provide an additional quantity estimated at 150,000 acre-feet which may be processed for ground-water recharge or direct irrigation diversion. Assuming 1,200,000 acre-feet is diverted from the Colorado River, it is estimated that the Central Arizona Project would augment the present area supply by about 1,020,000 acre-feet through direct deliveries. Water conservation, through operation of the Buttes Reservoir and other Gila River storage, would add 50,000 acre-feet. There would be additional water in the area by reuse of deep percolation, waste, and effluent flows, although the amount thereof has not been precisely evaluated in this report. The coordination of conservation and control facilities involving surface-water supplies would be essential to realization of the optimum benefits from the introduction of an import supply. The construction of the Maxwell, Buttes, Charleston, Hooker, and Camelsback, or alternative reservoirs, would provide operational and regulatory control of surface water above the upstream places of use and make exchanges possible.The additional regulation obtained would make possible higher utilization efficiencies in the conveyance and distribution systems. Control of stormflows and improvement of irrigation practices could provide an additional usable water supply. 35Epson Perfection 4870 Photo, 400 dpi, 8 bit, 1,113,768 byte