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<br />The gaging stations on the Colorado River and its tributaries <br />below Glen Canyon Dam that are of particular significance to the Forum <br />~: studies and for which data are available are described as follows: <br />~ <br />~ Colorado River at Lees Ferry. Arizona. Data on streamflow are <br />available at this station for the years since 1922, but water quality <br />data are lacking for years 1941, 1942, 1946, and 1947. The data for <br />these years were estimated by extensive multiple correlations USing <br />data for the Colorado River near Cisco, Utah, and near Grand Canyon, <br />Arizona; the Green River at Green River, Utah; and the San Juan River <br />near Bluff, Utah. <br />Little Colorado River near Cameron. Arizona. The station is <br />45 miles upstream from its confluence with the Colorado River and <br /> <br />9.5 miles northwest'of Cameron, Arizona. Streamflow records are <br />from June 1947 to the current year. Only partial water quality data <br />are available. chemical analyses for the period 1950 to 1958 and <br />1970-71, and specific conductance from 1964 to 1969. <br />Virgin River at Littlefield. Arizona. The station is 0.4 mile <br />upstream from ~ittlefield, Arizona, and 36 miles upstream from Lake <br />Mead. Streamflow records are available from 1929 to the current year. <br />Water quality records are from July 1949 to the current year. <br /> <br />Colorado River below Hoover Dam, Arizona-Nevada. Discharge data <br />are available for 1941 to current year. Water quality data are <br />available exaept for the period November 1944 through September 1950. <br />Water quality data for this period are based on specific conductance <br />with chemical analysis only at intermittent intervals. <br />Colorado River below Parker Dam, Arizona-California. Flow data <br />are available for the period 1941 to the current year. The water <br />quality data are available for the period January 1964 through the <br /> <br />-21- <br /> <br />-~ <br />