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<br />Source <br /> <br />1980 <br /> <br />1990 <br /> <br />2000 <br /> <br />2010 <br /> <br />2020 <br /> <br />2030 <br /> <br /> <br />~ <br />l'\j <br />~ <br />~ <br /> <br />TABLE 2 <br /> <br />Projected Concentrations of Total Dissolved Solids <br /> <br />(mg/l) at Imperial Dam <br /> <br />(Average values) <br /> <br />Year <br /> <br />EPA <br /> <br />1,060 <br /> <br />1,220 <br /> <br />CRBC <br /> <br />1,070 <br /> <br />1,340 <br /> <br />1,390 <br /> <br />WRC <br /> <br />1,260 <br /> <br />1,290 <br /> <br />1,3S0 <br /> <br />USBR <br /> <br />1,000 <br /> <br />1,200 <br /> <br />1,250 <br /> <br />EPA: Environmental Protection Agency <br /> <br />CRBC: Colorado River Board of California <br /> <br />WRC: Lower Colorado Region Comprehensive Framework Study (Water <br /> <br />Resources Council) <br /> <br />USBR: Bureau of Reclamation <br /> <br />The differences in the values reported by the various agencies <br /> <br />arise from assumptions made regarding completion dates for water <br /> <br />development projects, estimates of the amount of salt loading or <br /> <br />concentration effects produced by these projects, the period of <br /> <br />9 <br />