OCR Text |
Show Two projected levels of development were considered in project formulation (OBE-ERS and modified OBE-ERS levels). The significant differences in the two levels are outlined in the Alternative Levels of Development chapter. This program is based on the modified OBE-ERS projected level of development and is designed to satisfy as much of the individual func- tional demands as practicable. Some remaining demands, unmet by- multipurpose development, are treated as primary-purpose items in the framework program. In keeping with the guidelines set out for this study, the present and projected requirements for services, products, environmental develop- ment, and resource development were all given consideration. The annual volume of import of water required was calculated to satisfy all stated needs. Equal priority was given to all water uses. EARLY ACTION PROGRAM, 1965 - 19^0 Multipurpose Water Supply The early action program objective is to fully utilize all surface water supplies available to the Region, seek every means of conserving water far beneficial use, to explore the effects of ground-water over- draft, and investigate possibilities of untapped ground-water reserves that might be utilized as an interim measure until augmentation from sources outside the Region could be achieved. Presently authorized water supply projects included in the 19&5 to 1980 framework program include the following: the Central Arizona Project, a multipurpose project which will provide facilities to convey up to 1# 67 million acre-feet of Colorado River water to central Arizona; the Southern Nevada Water Project which will initially provide facilities to convey 0,13 million acre-feet of water from Lake Mead to the Las Vegas, Nevada, metropolitan area for municipal and industrial uses and provides for additional stages, which may be altered or relocated as required; and the Dixie Project which will provide supplemental and new irrigation water in addition to water for municipal and industrial uses in southern Utah. Tertiary treatment facilities would make available 260,000 acre-feet of waste waiter for direct reuse. Also to be provided, by authorized projects during this time period, is the recovery of approximately 270,000 acre-feet annually along the Colorado River which are now being used by the total natural river- associated ecosystem. In addition, 35,000 acre-feet of water can be 90 |