Appraisal Report Central Arizona Project

Document: "Appraisal Report Central Arizona Project- Synopsis", January 1962, page 153. Water uses in the area exceed the available safe annual supply, and present demands are being offset by an overdraft of the ground-water basins averaging about 2,200,000 acre-feet per year. 4. Unless additional water is made available to the project area, a substantial reduction in the presently developed lands in the area will occur and urban growth and development will be retarded. 5. The only practicable source of additional water at the present time is the Colorado River. The quantity of water which could be diverted annually to the project area is indeterminate pending settlement of litigation. The present appraisal is based on an assumed diversion of 1,200,000 acre-feet per year from the Colorado River. This is the same figure used in the original report. This assumption has been made for the purpose of analyzing the project under present conditions without intent to anticipate the terms of any decree or order in the case of Arizona vs. California now pending before the Supreme Court of the United States. 6. The overall plan described in this appraisal provides a favorable means of accomplishing the purposes of the project. This plan is based on average conditions throughout the project area, and further investigations will be required to provide detailed information on variations from averages. 7. Colorado River water can be delivered by aqueduct from Lake Havasu above Parker Dam, serving areas below the aqueducts and the city of Tucson. Other needs at higher elevations can be served through water exchange agreements. 8. Present demands for supplemental irrigation and municipal and industrial water supplies exceed the quantity assumed for diversion from the 15Epson Perfection 4870 Photo, 400 dpi, 8 bit, 1,097,336 byte