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<br />WEIGHTED MONTHLY SALINITIES AT <br />SELECTED COLORADO RIVER STATIONS l' <br />AND RUNNING 12-MONTH NIB-INPERIAL FLOW-WEIGHTED SALINITY DIFFERENTIAL <br />(in parts per million) <br /> <br /> Below Below Palo Verde At At Northerly Inter- Running 0 <br /> Hoover Dam Parker Dam Canal Near Blvthe Imperial Dam national Boundarv 12-Month 0 <br /> 5-Year 5-Year 5-Year 5-Year 5-Year Flow-WId. .-. <br /> w <br /> avg.Y avg.Y avg.Y avg.Y avg.Y Differential 31 t'-.J <br /> 1974-78 2001 2002 1974-78 2001 2002 1974-78 2001 2002 1974-78 2001 2002 1974-78 2001 2002 2001 2002 ,",'1 <br /> Month , <br /> Jan. 690 580 582 709 576 751 599 913 707 708 1,041 847 856 119.3 139.0 <br /> Feb. 675 578 611 706 591 732 593 835 655 676 998 758 839 115.5 146_9 <br /> March 684 585 605 699 590 727 599 805 659 675 925 747 783 114.8 152.2 <br /> April 680 588 600 700 582 714 588 801 642 658 892 722 781 111.4 157.7 <br />, May 677 588 698 593 709 603 822 651 962 831 114.2 <br />..... June 678 5BB 695 5B4 712 595 812 655 956 816 116.9 <br />, <br /> July 6B2 592 6BB 590 709 597 797 682 909 804 117.4 <br /> August 690 584 686 594 706 597 800 702 907 876 119.1 <br /> Sept. 672 593 686 590 737 594 815 707 952 898 121.9 <br /> Oct. 6BO 581 689 596 739 601 854 712 1,070 1,010 132.4 <br /> Nov. 682 601 692 594 746 605 897 714 1,010 920 136.2 <br /> Dec 681 5B5 702 731 877 743 999 896 138.8 <br /> I <br /> <br />General Notes: <br /> <br />11 Salinities based on "sum of constituents". <br /> <br />'2,/ 5-Year averages are arithmetic <br /> <br />'AI 12-month flow-weighted differential between NIB and Imperial Dam through month shown in left column. <br />