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Table 2. Mean percent error associated with the number of <br />points used in establishing a stage-discharge <br />relationship, using refined data with limits placed <br />on the data used and range of extrapolation. Use <br />of one point indicates application of Manning's <br />equation. <br /> <br /> Number of Points used in Calibration <br />Location of Gaging Stations 1 2 3 4 5 6 <br /> <br />Oak Creek near Corvallis, OR 14.8 10.2 9.5 9.2 8.9 8.7 <br />Yakima River at Umtanum, WA 18.2 2.7 2.5 2.3 2.2 2.2 <br />American River near Nile, WA 17.6 6.1 5.8 5.8 5.4 5.3 <br />Yampa River at Maybelle, CO 12.6 5.8 5.3 5.1 5.1 5.2 <br />Yampa River at Steamboat <br />Springs, CO 14.1 5.4 5.5 5.3 5.1 4.9 <br />Ri <br />ver <br />Cache la Poudre <br />at mouth (CO) Z4.4 5.2 4.9 4.7 -- -- <br />South Plate River near <br />Kersey, CO 26.2 5.3 4.9 4.7 -- -- <br />North Branch, Elkhart River <br />near Cuspervi 1 e, IN 16.4 22.9 16.8 15.0 14.1 13.5 <br />Elkheart River at Goshen, IN 20.6 7.1 6.6 6.2 6.0 5.9 <br />St Joesph River at Elkhart, IN 20.1 8.0 7.2 7.0 7.0 6.1 <br />3y