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<br />N <br />W <br />00 <br />N <br /> <br /> TABLE 4 <br /> FLOW-WEIGHTED AVERAGE ANNUAL SALINITIES <br /> AT SELECTED STATIONS <br /> (Total Dissolved Solids in mg/l*) <br /> Calendar Year <br /> Standard 1973 1974 1975 1976 <br />Below Hoover <br />Dam 723 706 686 686** 675** <br />Below Parker <br />Dam 747 726 700 703 689** <br />At Imperial <br />Dam 879 846 836 829** 823** <br /> <br />* Determined annually by the Bureau of Reclamation from <br />data collected by the U. S. Geological Survey. <br /> <br />** Provisional records. <br /> <br />7 <br />