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<br />I <br />I <br />I <br />, I <br />I <br />,I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />Where possible, pressure for sprinklers would be developed by gravity, but on <br /> <br /> <br />many of the systems booster pumps would be required to increase the pressure. <br /> <br />Because main canals will remain in service, the combined agency plan will not <br />remedy seepage problems associated with winter deli very of stockwater. <br />'l'herefore, Reclamation's winter water replacement plan needs to be <br />incorporated into the plan to provide a more complete solution to the problem. <br />under the winter water improvement plan, approximately 215 stockponds would be <br />enlarged and lined and 24 new ponds would be constructed so that winter water <br />could be removed from the canals. Expansion of culinary water systems is <br />being considered as an alternative to pond lining in some areas. <br /> <br />In areas where sprinkler irrigation is too costly, the SCS would consider <br />other improved management alternatives. <br /> <br />Cost Effectiveness <br /> <br />In determining salt load reduction and cost effectiveness, the following <br />assumptions were made: <br /> <br />_ Salt load reductions were estimated using the last loading factor of <br /> <br /> <br />2.4 tons per acre-foot of reduced inflow to the ground water system. <br /> <br />_ Seepage from main canals is assumed to 0.23 feee /feee /day as determined by <br />ponding tests. <br /> <br />IV-3 <br /> <br />(IV' 6" ,"" <br />v l .1.U <br />