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<br />I\:) <br />~ <br />~ <br />1-4 <br /> <br />The Colorado River Indian Reservation Unit Concluding <br />Report was issued October 1979. The appraisal level study <br />found that, based on accumulated data through 1975, the <br />reservation is not adding soluble material to the Colorado <br /> <br />River at this time. Monitoring will continue as agricul- <br />tural expansion occurs. <br /> <br />A status report on the Palo Verde Irrigation District <br />(PVID) Unit, California, was published March 1980. Most of <br />the salt pickup (144,000 of 152,000 tons) comes from one <br />subarea in the southwestern part of the District. Federal <br />and other interests are pursuing the possibility of tempo- <br />rarily using surplus flows in the Colorado River to speed <br />up the leaching of salts from that area. A leaching test <br />will be made this winter on 320 acres of farmland in PVID. <br /> <br />A new appraisal study to evaluate alternatives to <br />current method~ of ansite brine disposal is underway. The <br />study, "Saline Water Use and Disposal Opportunities", has <br />two thrusts: (1) investigating the use of using saline <br />water for energy development, and (2) investigating the feasi- <br />bility of a pipeline collection and disposal system for <br /> <br />saline water and other collected waste waters, such as <br /> <br />waste water from powerplants and oil shale development. <br /> <br /> <br />Over 400,000 acre-feet per year of saline water could be <br /> <br />collected for disposal or for use in energy developments <br />(e.g., for cooling water in powerplants and for use in <br />slurry lines which transport coal). <br />-13- <br />