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<br />I <br />'I <br />i 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 />SUMMARY <br /> <br />Historically, the Price and San Rafael Rivers contribute 232,000 and <br />193,000 tons of salt per year, respectively, to the Colorado River System. Of <br />this amount approximately 60 percent is attributable to irrigation practices. <br />Studies performed by Reclamation and the SCS indicate that for each arce-foot <br />of irrigation water that can be prevented from entering the ground water <br />system, 2.4 tons of salt will be prevented from entering the Colorado River. <br /> <br />Reclamation and the SCS have been studying the possibility of developing <br />pressurized sprinkler irrigation systems as a means to reduce deep percolation <br />of irrigation water and the associated salt loading. Under this plan main <br />conveyance facilities would be constructed by Reclamation and on-farm <br />improvements would be developed by the SCS. <br /> <br />A total of 76 independent pressurized laterals with associated on-farm <br /> <br /> <br />sprinkler improvements have been evaluated. The cost effectiveness of these <br /> <br /> <br />systems varies from $27 to $217 per ton of salt removed. Both agencies are <br /> <br /> <br />seeking input from the Salinity Forum Work Group regarding what the upper <br /> <br /> <br />limit for cost effectiveness should be for increments included in the <br /> <br /> <br />recommended plan. Data is included in the report to help the work group make <br /> <br /> <br />that determination. <br /> <br />Once that limit is established, Reclamation and the SCS will work with the <br /> <br /> <br />irrigators to obtain expressions of interest so that a recommended plan can be <br /> <br /> <br />finalized and planning reports completed. <br /> <br />"\ II' 51'..., <br />li'v\', ..i' <br /> <br />S-1 <br />