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<br /> <br />I-" <br />00 <br />C;.:J <br />~. <br /> <br /> <br />CHAPTER 4 <br /> <br />CONCLUSIONS <br /> <br />1. The total fresh water supply of the State of Utah is not <br />sufficient to satisfy all the potential uses beyond the year 2020. The <br />Wasatch Front area contains, or has access to, the major sources ,of this <br />supply. In addition, the Wasatch Front contains the financial base nec- <br />essary for the required water development. For the overall growth of <br />the State, it appears desirable that the Wasatch Front intensively develop <br />loca1 supplies, and thus release other supplies for use in other areas of <br />the State. <br /> <br />2. A unique opportunity for desalting exists along the Wasatch <br />Front in the Salt Lake City area in terms of the need for M&I water, <br />power and process steam for industrial development along with the avail- <br />ability of a large supply of brackish water now entering Great Salt Lake. <br />The Lake can serve as a natural basin for brine disposal. Desalting plants, <br />properly phased to meet local demands, could be integrated into the State's <br />overall water development plan. <br /> <br />3. The quantity and quality of water presently flowing from the <br />Wasatch Front into Great Salt Lake is not unduly restrictive on the sizes <br />and types of desalting plants feasible. Approximately 1,600,000 acre-feet <br />annually is discharged into the Great Salt Lake. Projected uses will re- <br />quire regulation for much of this flow, permitting uninterrupted operation <br />of a desalting plant of at least 100 MGD (112,000 acre-feet per year) <br />capacity. Total dissolved solids content should range between 1000-2000 ppm. <br />Quantity and quality dat are limited, and the collection network needs to <br />be expanded to permit refinement of projections for use in plant design. <br /> <br />4. Within the technological time frame of the study (1975-1985) and <br />based on the present state-of-the-art, desalting along with power and process <br />steam production in the plant capacities considered is both technically and <br />practically feasible under the Utah conditions. <br /> <br />5. Either the distillation or electrodialysis processes can be <br />practically used in desalting potential feedwaters entering the Great Salt <br />Lake. These and other promising desalting processes, which may evolve in <br />the interim, should be considered in any future desalting study in Utah. <br />Specific advantages using distillation process include: <br /> <br />(a) The distillation process can be used to supply high quality <br />(less than 25 ppm) product water for special industrial needs. <br /> <br /> <br />(b) The process can be used 'in providing potable water through <br />blending with available fresh water sources, especially in <br />utilizing high salinity feedwaters. <br /> <br />-11- <br />