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<br />trend shown in the following graph, possibly reaching a <br /> <br />~ <br />(,n <br />C"I <br />c.) <br /> <br />level of 1012 mg/L* at Imperial Dam by about 2010, <br /> <br />*Current projection from 1985 Evaluation of Salinity <br /> <br />Control Pro~rams in the Colorado River Basin <br /> <br />Salinity Trend Projections Graph <br /> <br />A total salt load of about 9 million tons annually entering <br /> <br />Lake Mead in the Lower Colorado River Basin adversely <br /> <br />affects more than 18 million people and 1 million acres of <br /> <br />irrigated farmland in the United States, <br /> <br />Damages in the <br /> <br />amount of $580,000 (based on January 1985 costs) are <br /> <br />projected to occur for each increase of 1 mglL at Imperial <br /> <br />Dam when salinity concentrations reach the 875 to 1225 mglL <br /> <br />range as shown in the following pie chart. A review of the <br /> <br />procedures for calculating damages and total costs is <br /> <br />expected to be completed by September 1986, <br /> <br />pie chart showing total losses $580,000 per mglL <br /> <br />The losses associated with municipal and industrial use <br /> <br />occur primarily from increased water treatment costs; <br /> <br />accelerated pipe deterioration and appliance wear, <br /> <br />increased soap and detergent needs, and decreased water <br /> <br />palatability. According to the EPA (Environmental <br /> <br />Protection Agency) secondary standards, public drinking <br /> <br />3 <br />