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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />J <br />J <br />i <br /> <br /> SALINITY <br /> Parts per Million <br /> Colorado River at Northern Boundary <br /> From IB&WC graph, From Mexican Section <br /> distributed 6 May 64 IB&WC 25 Aug 72 <br /> No. of days <br /> represented Days <br /> ~ by samples ~ x ppm <br />Jan 1961 1270 <br />Feb 1390 <br />Mar 1290 <br />Apr 1420 <br />May 1700 <br />Jun 1300 30 1110 33,300 <br />Jul 1200 29 1201 34,820 <br />Aug 1210 31 1252 38,820 <br />Sep 1510 20 1656 33,120 <br />Oct 2500 8 2665 21,318 <br />Nov 2430 27 2519 68,013 <br />Dec 1910 30 1765 52,950 <br />Total 19,130 175 ' 282,341 <br />Divided by 12 175 <br />Average 1594 1613 <br /> <br />Maximum for year 3033 ppm on Nov 22 and Dee 13 <br /> <br /> <br />Minimum for year 1060 ppm on Jul 23 <br /> <br />Figure 13b <br />