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<br />. <br /> <br />. <br /> <br />in 1968-1969 by the FWPCA and the Water and Power (formerly Bureau <br />of Reclamation). The results of these studies were published in 1971 <br /> <br />by the Environmental Protection Agency under the title of Mineral <br />Quality Problems in the Colorado River Basin. <br /> <br />Since 1970, Water and Power has conducted an Intensive Salinity <br /> <br /> <br />Surveillance Program (ISSP) in the Colorado River between Parker Dam <br /> <br /> <br />and Imperial Dam. The program involves regular sampling of water <br /> <br />quality at major diversions, agricultural drains, and the river itself <br /> <br />between Parker Dam and Imperial Dam. The average annual net salt dis- <br /> <br /> <br />charge to the river, based upon these data, is 167,000 tons. <br /> <br />Bookman-Edmonston Engineering, Inc., under contract with Water and <br /> <br />Power, studied and reported on, "Reduction of Salt Loading to the <br /> <br />Colorado River from the Palo Verde Irrigation District," in August 1976, <br /> <br />Based on this report and subsequent Water and Power studies, a status <br /> <br />report was published in March 1980. <br /> <br />Department of Agriculture Activities <br />The Soil Conservation Service (SCS), an agency of the Department of <br />Agriculture (USDA), works closely with the Water and Power Resources <br /> <br />Service to coordinate the salinity control programs. In the PVID, SCS <br /> <br />provided consultation on onfarm management practices and irrigation <br /> <br />water management. <br /> <br />List of Participants <br /> <br /> <br />Agencies participating in the study include the SCS, Ge010gicafJ~u~~~9 <br /> <br /> <br />Bookman-Edmonston Engineering, the PVID, and the Salinity Laboratory at <br /> <br />Riverside, California, and the Colorado River Board of California. <br />