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<br />IS <br /> <br /> <br />w <br />w <br />o <br />o <br /> <br />Study." The report is currently under review by EPA and has not <br /> <br />yet been released. It deals with the control of salinity from spe- <br />cific identified sources, appraises potential salt-load reduction <br /> <br />values, and evaluates status of the economic feasibility of salin- <br /> <br />ity control. TIle need for a coordinated salinity control program <br /> <br />for the entire Colorado River is stressed. <br /> <br />Need for Controlling Salinity of the Colorado River (CRBC) <br /> <br />The Colorado River Board of California published a report entitled <br /> <br />"Need for Controlling Salinity of the Colorado River" in August 1970. <br /> <br />Using available data, the report traces the average salinity prin- <br /> <br />cipally at Hoover, Parker, and Imperial Dams and makes projections <br /> <br />for the years 1980, 2000, and 2030. The historical average is based <br /> <br />on the years 1963-1967 and shows values below Hoover Dam to be <br /> <br />730 mg/l and at Imperial Dam 850 mg/l. Below Hoover Dam, values of <br /> <br />830 and 1,090 mg/l are projected for the years 1980 and 2030, <br /> <br />respectively. Comparable projections for Imperial Dam suggest <br /> <br />1,070 mg/l in 1980 and 1,390 mg/l in 2030. The salinity is esti- <br /> <br />mated to cause $8 to $10 million damage annually for each sali~!ty <br /> <br />increase of 100 mg/l. The report identifies a number of potential <br /> <br />salinity control projects which, if constructed, might serve to <br /> <br />maintain salinity near present levels. <br />