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<br />Salinity Concentration at Monitoring Stations <br />Salinity concentrations for the years 1973-1985 at the <br /> <br />f\:) <br />(J1 <br />w <br />w <br /> <br />three stations at which numeric criteria have been set; below <br /> <br />Hoover Dam, below Parker Dam and at Imperial Dam are shown in <br /> <br />Table 3. These concentrations are all less than the numeric <br /> <br />cr iter ia. <br /> <br />TABLE 3 <br />Fr..CW-WEIGm'ED AVERAGE ANNUAL SALINITY ~TIOOS <br />Nr SEL!'l:TED STATIOOS <br />('IOtal Dissolved SOlids in ng/l*) <br />calendar Year <br /> <br />Numeric <br />Criteria 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 <br /> <br />BelCM Hoover <br />Dam 723 675 681 680 674 665 678 688 691 681 679 665 611** 500** <br /> <br />BelCM Parker <br />Dam 747 709 702 702 690 687 688 701 712 716 717 698 642** 580** <br /> <br />At Imperial <br />Dam 879 843 834 829 822 819 812 802 760 821 826 710 670** 607** <br /> <br />*Determined annually by the Bureau of Reclamation from data oollected by Reclamation <br />am the U.S. Geological Survey am recalulate:1 from new data according to "Quality <br />of Water - Colorado River Basin," Progress Rep:>rt No. 12, January 1985. <br /> <br />**Provisiona1 records. <br /> <br />Status of Salinity Control Activities <br />Department of the Interior/ <br />Department of Agriculture <br />In this annual progress report, salinity control <br />projects in which both Departments of the Interior and <br />Agriculture are involved are described as joint rather than <br />separate projects. <br />Progress during the reporting period on the salinity <br />projects authorized by Title II of P.L. 93-320 and P.L. 98- <br /> <br />-6- <br />