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<br />~ <br />..... <br />~ <br />..... <br />c:' <br />o <br /> <br />7. Schedules based UpOT the principle that required statel1ne <br /> <br />deliveries shall vary with indices of natural water produotion. are <br /> <br />desirable in that natural variati.ons in climatIo conditions are not <br /> <br />charged to the acoount of irrigation development. In effeot. suoh <br /> <br />sohedules constitute measures and limitations of oonsumptive use. <br /> <br />which largely is the result of irrigation. <br /> <br />8. The reoorrmooded sohedules. aocording to the report of' the <br /> <br />engineering advisers, are intended to proteot present uses of _tel' in <br /> <br />eaoh of the three states, beoause "the usable supply is no more than <br /> <br /> <br />suffioient to satisi'y suoh need'G".. Manii'estly, if the 1i1$able supply <br />. ~+ <br /> <br />is no lll.Ore 'hhan suffioient for the;needs of New Mexioo and Texas. it <br /> <br />may ~ oXl>E'oted that the sts:te1ine delivery sohedules, to be observed <br /> <br />by Colorado. hava been devised in such a way t.l,at, to llJllet them, t.he <br /> <br />S!ln Luis Valley must keep its future oonsumption of water at substantill.lly <br /> <br />too present status. A brief study of this feature may be j ustii'ied. <br /> <br />9. Table A. hereto atUched, indioates thAt had the reoommended <br /> <br />schedule for the Rio Gl'!lIlde River been in effeot during the recent <br /> <br /> <br />period or 1925-19:56 (for whioh reoorded data ill available), there would <br /> <br />haw r'esul ted on e mees of' credi {;s averaging 1:5,200 aore_feet for the <br /> <br />12..year period. Assuming this l2-year period to be representative of <br /> <br />future oonllUl!l.pti va use ooodi tions llnd relations. then the limit of futUre <br /> <br />irrl.gation development woold have bean reached when the stl'elllll flow <br /> <br />deplet:1. ons shall have inoreased by en ll.1Tersge of 13,200 acre-feet per <br /> <br />year. <br /> <br />-4- <br />