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<br />well field area. This case indicated advantages to basing the design on <br /> <br />aquifer transwissivity. The main advantage to the case 4 arrangement, <br /> <br />totaling 100 wells, apparently is the broad cone of depression resulting <br /> <br />from pucplng heavily in zones of high transmissivity. This broad cone <br /> <br />of depression results in a broad area of ,",,<car salvase. <br /> <br />In April of 1975 representatives from the S~reau and the Geological <br /> <br />Survey met with Colorado State Engineer personnel in Denver to discuss <br /> <br />the technical considerations concerning ti:_e Closed Basin Division. <br /> <br />Conclusio..s drawn from the GS' s analog and_ digital studies indicate that <br /> <br />the Closed Basin Division w11l provide thE, -water salvage expected; <br /> <br />however, a redesign in the southern porticn of the salvage areas will <br /> <br />probably be required. <br /> <br />We are informed that a congressional write-in is probable in fiscal year <br /> <br />1976 toinitiau preconstruction planning for this division. At the <br /> <br />April meetfng discussions were generally concerned as to how we should <br /> <br />proceed w~t~ post authorization studies. The first step will be to <br /> <br />"Gtabli ,.:, a ~"r~e~ of observation wells iT, both the shallow and ar-:esun <br /> <br />aquifer. '",rrounding all salvage areas of t he Closed BasIn 'to Cloni :or <br /> <br />the effects of the project on the water level of those aquifers. ,\ <br /> <br />large number of w.lls which would be suitable for observation of project <br /> <br />effecta are pre,;ently available il1 the shallow squifer; hovever, w~ <br /> <br />expect to have to drill Clost of the observa_tion wells in the arresian to <br /> <br />assure t~at the project is not affecting the artesian. loIe expect to <br /> <br />contract 'for drilling and equipping this l~hservat;ion well network. We <br /> <br />Tn, '3' t;:, <br />itf\J c' l,Q <br /> <br />8 <br />