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<br />C'J <br />N <br />00 <br />C\! <br /> <br />will be adequate for irrigatien until the date when diversion~ <br /> <br />by junior appropriators has to be reduced because of decreasing <br /> <br />stream flow, provided that diversions prior to such date are <br /> <br />limited to water which can bo oconomically and efficior~ly usod. <br /> <br />at loast.in years of less thnn avo rage runoff. <br /> <br />Conclusions <br /> <br />(a) The West Divide Public Irrigation District as n~l <br /> <br />constituted cor:ta',ns 9.000 acres of irrigated and arable land, of <br /> <br />which 91%, or 8,161 acres, is irrigated. The arable land would <br /> <br />pro~ably serve to maintain an irrigated area of 8100 acres as <br /> <br />tracts are retired because of seepage or other causes. <br /> <br />(b) The so-called Haystack Reservoir site is the <br /> <br />largest available on West Divide Creek and has ll. maximum <br /> <br />capacity of 7,000 acre feet. With necessary feeder canals its <br /> <br />construction cost is ;~9lrl,384, or ~1l5.3~ pel" acre irrigated. The <br /> <br />annual construction c~~rge on a basis of repll.)%ont in 40 years <br /> <br />is $23,535. To this should be added ::;4,000 for operation and <br /> <br />maintenance, making a total of ~27,535. The total ~nnual charge <br /> <br />per acre irrigated would be Q3.37. With an estilID.ted transit loss <br /> <br />of 5% and a resulting delivery in most years of 6,650 acre feet of <br /> <br />water, the charge por acre foot would be :')4.14. <br /> <br />(c) If water is efficiently used with dIversions for <br /> <br />direct use during the storage soason restricted to the minimum <br /> <br />required for full crop production, the Haystack Resorvoir will <br /> <br />fill overy year except such yoars as 1902 and 1934 whon very <br /> <br />littlo wator would be storablo. <br /> <br />D <br />