Appraisal Report Central Arizona Project

Document: "Appraisal Report Central Arizona Project-Chapter II", January 1962, page 17the Maricopa area is Phoenix which, according to U.S. Census reports, increased in population from 106,818 in 1950 to 439,170 in 1960. Phoenix ranks 29th in population among leading U. S. cities following immediately below Columbus, kansas City, Indianapolis, and Minneapolis, in that order. The city limits of Phoenix embrace over 120,000 acres, a large portion of which is previously irrigated land of the Salt River Project. The photograph of Phoenix shows the urban developments spreading over previously irrigated lands and onto the desert areas beyond. The major portion of the city presently lies within the project boundaries and has an adequate water supply from local sources, since Salt River Project water is transferred from irrigation to municipal use as irrigated lands are subdivided. Lands within the city, but outside the Salt River Project area, must obtain water from nonproject sources. The major city of the Santa Cruz area is Tucson. Census reports show the population of this city increased from 45,454 in 1950 to 212,892 in 1960. Tucson ranks 54th in population among U. S. cities, following immediately below Syracuse, Richmond, Wichita, and Tulsa. The city limits of Tucson embrace approximately 45,000 acres, the major portion of which were desert lands with no previous history of irrigation and for which no possibilities are present for transferring irrigation supplies to municipal use. Plate 5 illustrates the historic population growth of Arizona and the major urban areas of the Central Service Zone. Table 2 shows the present estimated water uses in the various irrigated and urban areas. Water uses were estimated from data obtained from municipalities and water user organizations and by computations based on the Blaney-Criddle method of estimating consumptive uses with adjustments 17Epson Perfection 4870 Photo, 400 dpi, 8 bit, 1,149,239 byte