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<br />, , <br />- ,--....,. <br /> <br />CJ".) <br />C\i <br />(\1 <br />,....j <br /> <br />page I <br /> <br />::"") <br /> <br /><.'":'.:' <br /> <br />The principal research and demonstration activities <br /> <br />to date have been accomplished in the demonstration area <br /> <br /> <br />between Grand Junction and Clifton as shown in the <br /> <br />accompanying location map. Also, a drawing of the canals <br /> <br />in Grand Valley has been included. As of October 1972, <br /> <br />three projects have been undertaken. The first project <br /> <br />involving conveyance channel lining was initiated in <br /> <br />September 1968 and completed January 1972, while the second <br />project involving irrigation sCheduling and tile drainage <br /> <br />as salinity control measures was initiated in February 1972 <br /> <br />and will be completed in January 1974. The third project, <br /> <br />which will be conducted on a 40-acre field west of Grand <br /> <br />Junction, was funded on October 16, 1972. <br /> <br />CANAL LINING <br /> <br />Project Objectives <br />1. To demonstrate that the mineral quality of the <br /> <br />Colorado River can be improved by lining irri- <br /> <br />gation canals and other water conveyance channels. <br /> <br />2. To evaluate the effectiveness and general appli- <br />cability of this method of salinity control. <br /> <br />Plan of Operation.-- In three selected study areas, irri- <br /> <br />gation canals and other water conveyance channels were lined <br /> <br />to control the major source of recharge to the near-surface <br /> <br />aquifers: thereby minimizing the quantity of flnl>J 'hrough <br /> <br /> <br />mineral yielding geological formations and reducing the <br /> <br /> <br />gradient which forces saline water into the Colorado River. <br />