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<br />I <br />, I <br />, I <br />I <br />I <br />i I <br />I <br />I <br />I <br />I <br /> <br />Figure <br /> <br />1 <br /> <br />2 <br /> <br />3 <br /> <br />4 <br /> <br />5 <br /> <br />6 <br /> <br />7a <br /> <br />I <br />I <br />I <br /> <br />7b <br /> <br />8 <br /> <br />9 <br /> <br />10 <br /> <br />11 <br /> <br />12 <br /> <br />13 <br /> <br />LIST OF FIGURES <br /> <br />The Colorado River Basin <br /> <br />Relative magnitude of salt sources in the <br />Colorado River Basin, (taken from U.S. Dept. <br />of Interior, 1970) <br /> <br />The Grand Valley, Colorado <br /> <br />. <br /> <br />Relative magnitude of salt sources from <br />irrigated areas in the Colorado River Basin, <br />(taken from U.S. Dept. of Interior, 1970) <br /> <br />General geology of the Grand Valley, <br />(taken from U.S. Dept. of Agriculture, <br />1955) . <br /> <br />Soil classification map of Area I, (taken <br />from U.S. Dept. of Agriculture, 1955) <br /> <br />East-West soil profile in Area I <br /> <br />North-South soil profile in Area I <br /> <br />Normal precipitation and temperature at <br />Grand Junction, Colorado <br /> <br />Instrumentation locations in the intensive <br />study area <br /> <br />Project personnel using the jetting rig to <br />install steel pipe piezometers <br /> <br />One-foot cutthroat flume located in an open <br />drain in the test area <br /> <br />Recommended construction in Area I as <br />indicated by shaded lengths of canals <br /> <br />Lateral system supplied by the Stub Ditch, <br />Price Ditch, and the Government Highline <br />Canal . <br /> <br />viii <br /> <br />Page <br /> <br />2 <br /> <br />3 <br /> <br />6 <br /> <br />7 <br /> <br />11 <br /> <br />14 <br /> <br />17 <br /> <br />17 <br /> <br />22 <br /> <br />25 <br /> <br />27 <br /> <br />30 <br /> <br />38 <br /> <br />42 <br /> <br />003148 <br />