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Attachment No. 4 COpy 0 0 12 92 SAVING WATER IN ARIZONA COpy A Report on Water Conservation Practices and Pr ograms in Arizona January, 1966 Central Arizona Project Association Arizona Title Building, Phoenix, Arizona 85003 SUMMARY Arizona framers have invested more than $115,000,000 on ditch lining, land releveling and pump-back systems alone to conserve water. More than 95% of all water delivered to municipal water users in Arizona is metered. Farm irrigation deliveries are also carefully measured by all water districts in Central Arizona. Sixty-four percent of all farm irrigation ditches (7,672 miles of them) in Arizona are lined with concrete to prevent water loss, and lining continues at a rapid rate. More than 2,000 miles of district delivery canals are lined, and more lining is in process each year. The Salt River Project in Central Arizona has spent $15,000,000 during the last 15 years on works to conserve water and deliver it efficiently. The Central Arizona Project plan specifies that water will be delivered only to users having lined canals and ditches. The Salt River Project and U. S. Forest Service will spend approximately $ 7 5,000,000 in the next 25 years to improve the efficiency of water yield on 7,500,000 acres of Arizona watershed lands. Pumped ground water is a major source of irrigation water in Arizona. A common pump lift in Central Arizona is 300-450 feet and the over-all cost from that depth is estimated to be $12.00-$18.00 per acre-foot. Irrigators can't afford to waste at that cost. Industrial use of water in Arizona is largely accounted for by the mining industry. For every 1,000 gallons of new water used by this industry, 3,000 gallons are reused. Some of it is reused as many as seven times. Direct reuse of municipal sewage water is at present limited to irrigation of non-food crops, but intensive research programs are in process to develop