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<br />" <br /> <br />. <br /> <br />. <br /> <br />.' <br />. <br /> <br />If the investigation reveals that the change is not temporary, <br />a new range of values will be preparedll. However, the baseline <br />~ values based on the 1972 level of development may continue to be <br />0) <br />UD used to determine the effects on salinity from activities within <br />~ <br /> <br />the area since 1972. <br /> <br />The procedure for preparing the new baseline <br /> <br />values will be similar to that used to prepare the initial baseline <br />value. <br /> <br />Salt load/flow relationships have been developed at the <br /> <br />following thirteen stations in the Colorado River Basin: <br /> <br />Colorado River near Cameo, Colorado <br />Gunnison River near Grand Junction, Colorado <br />Colorado River near Cisco, Utah . <br />San Juan River near Archuleta, New Mexico <br />San Juan River near Bluff, Utah <br />Colorado River at Lees Ferry, Arizona <br />Duchesne River near Randlett, Utah <br />Green River near Green River, Wyoming <br />Green River at Green River, Utah <br />San Rafael River near Green River, Utah <br />Dolores River at Cisco, Utah <br />White River at Watson, Utah <br />Virgin River at Littlefield, Arizona <br /> <br />These relationships are based on annual flow and annual salt load for <br />each of thirty-two years (1941-1972). Data were obtained from the <br />Water and Power Resources Service and modified to reflect 1972 condi- <br /> <br />tions. <br /> <br />11 <br /> <br />Examples of causes of permanen~. cQanges in salinity <br />requiring determination of new__ . salinity ranges <br />would be large water using projects or salinity con- <br />trol projects upstream of a monitoring station. <br /> <br />-2- <br />