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<br />. <br /> <br /> Numeric 1980 salinity Salinity concentration <br /> criteria concentration below numeric <br /> in mg/L in mg/L criteria in mg/L <br />Below Hoover Dam 723 707 . -16. <br />Below Parker Dam 747 703 -44 <br />Imperi al Dam 879 755 Y -124 <br /> <br />w <br />...... <br />tv <br />tv <br /> <br />Y The low salinity concentration for Imperial Dam is the result of <br />excess flows that occurred in 1980. <br /> <br />There. is no reason to believe that the numeric criteria would be exceeded <br /> <br />during the next 3-year review period. Because of the extremely long lead <br />time required to conduct salinity studies, complete feasibility reports, <br />authorize and complete construction, and achieve full impact at lower main <br />stem stations, it is necessary to continue efforts to implement all feasible <br />salinity control measures. <br /> <br />. <br /> <br />. <br /> <br />vi <br />