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<br />I <br />I Table 7. Average surface ice thickness, free water depth, temperature, and dissolved <br /> oxygen for 14 backwaters sampled during Trip I (January 31 - February 4, 1994) <br />I and Trip II (February 21 - 24, 1994) of winter, 1993-94. CH = chute, SC = scour, <br /> ER = eddy return. <br /> Average Average Free Average Average D.O. <br />I Site Surface' Ice Water Depth (ft) Temperature (OC) (mgll) <br />(River Thickness (ft) <br /> Mile) Tripi Trip II Trip I Trip II Trip I Trip II Trip I Trip II <br />I 1-CH <br /> (332.0) <br />I 2-CH 0.5 1.0 0.09 11.7 <br />(329.7) <br />I 3-SC <br />(328.5) <br /> 4-CH 0.6 1.0 0.06 11.7 <br />I (327.3) <br />5-ER 0.2 0.3 1.3 0.8 0.84 0.91 12.4 12.2 <br /> (316.2) <br />I 6-CH <0.1 1.9 0.92 12.2 <br />(314.7) <br />I 7-SC 0.1 0 0.9 1.2 2.03 0.88 13.6 12.2 <br />(314.7) <br /> 8-CH 1.0 0.7 1.3 1.6 0.18 0.45 11.8 10.9 <br />I (298.2) <br />9-CH 0.9 1.4 1.9 1.1 0.10 0.46 10.5 6.0 <br /> (2972) <br />I 10- CH <br />(295.5) <br />I 11- CH 0.6 0.3 1.7 1.8 1.09 2.91 11.1 9.6 <br />(293.0) <br /> 12- SC 0.3 0.7 0.29 12.5 <br />I (292.5) <br />13- CH 0.5 0 1.5 1.0 3.22 11.0 <br /> (258.3) <br />I 14- CH 0 2.9 3.66 10.8 <br />(255.8) <br />I 'Includes both solid surface ice and frazil ice. <br />I <br />I 18 <br />I <br />