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Show 13 from this diagram it may be concluded that trie maximum monthly rate will seldom exceed. 130 percent of the average, although special conditions may arise and cause a larger ? ar- iation. Salt Lake City is a fair representation of this exception where water is used excessively because of the aridness and dryness of the climate in the mountain districts. There is enough water flowing down the different canyons around Salt Lake City ana if it were owned oy Salt Lake City and a storage reservoir were built so as to combine this supply,, it would supply a population of 500,000 people. But since the city only owns 63.8 percent of the water that, is useful for culinary purposes, it becomes necessary to go out outside of the Salt Lake valley for an adequate supply. from the population curve it is assumed that in the year 1950 the population will be about 200,000, this shall require a consumption of 150 gallons per capita per day making a total consumption of 30,000,000 gallons of water required per day. The total amount of water available at that time will be 20,000,000 gallons per capita per day, making a shortage of 10,000,000 gallons of water a day. To solve this shortage there are several sources that may be considered, imong these are the trading or buying of culinary water from the frovo River* a certain percent of which is now being used for irrigation; for the cities interest in the waters of Utah Lake, Jordan River and hast Jordan banal; another project is the building of a large storage reservoir in big Cottonwood Ganyon either at Mill D flat, or mules G- ulah; thirdly the Webber River may be considered as a likely source. There are two ways in which this supply may be brought into Salt Lake valley: |