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Show 16 ONE HUNDRED YEARS OF WATER DEVELOPMENT STILL MORE EXCHANGES BUT NO NEW SOURCES DEVELOPED In 1900 the population of Salt Lake City was 53,531. By 1920 it had again more than doubled; it was then 118,110. In the meantime the city's domestic supply from City Creek, from Parley's and Emigration, from its first three exchanges from Big Cottonwood, the wells, and the irrigation waters from the Jordan had barely sufficed, and during many years of that period restrictions upon the use of water were necessarily imposed. Once more, as on previous occasions, some new water supply was essential, and not for the future but to meet " the pressing demands" of the immediate present, and once more that was done, the only thing that could be done, to relieve the pressure of immin- 26. The East Jordan Canal extension, viewed north from the Big Cottonwood Canyon highway just below Sixieth South Street. Hampton C. Godbe :::-::, • ent want. Sources naturally contributing to the valley had to be looked to, sources available at relatively small expense and comparatively quickly. The possibilities of City Creek, Emigration and Parley's had been approximately exhausted; the City already owned the right to 50/ 120 of the primary flow of Big Cottonwood which it had increased by 1700 acre feet of storage in the Brighton lakes. The Little Cottonwood conduit was some ten years distant. There remained only Mill Creek and the remainder of Big Cottonwood Creek. Mill Creek was not readily susceptible of exchange because the city had no distribution facilities for the farming and suburban area affected. The same was true of the upper Big Cottonwood area but the East Jordan enlargement and extension had long been projected and work upon it was commenced during the year 1920. In anticipation of its early completion the City, on the second day of January of that year, entered into an exchange contract with the Big Cottonwood Tanner Ditch Company, which owned almost all of the rights in Big Cottonwood Creek used through the Big Cottonwood Tanner Ditch. During August of the next year a similar agreement was made with the Upper Canal Irrigation Company and in 1922 with the Green Ditch. EFFECT AND SIGNIFICANCE OF EXCHANGE AGREEMENTS By these agreements the City acquired valuable and essential rights to the waters of Big Cottonwood Creek, but in many respects it paid dearly for them. The first exchange contracts, those of 1888 and 1904 and 1905, required the city to deliver very little more of irrigation water than it re- ^; Mmm? m |