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<br />gages are silualed on Mill Creek, three are on Big Col- <br />tonwood Creek, one is on Little Cotlonwood Creek, <br />and three are on the Jordan River. Of the II precipi- <br />tation gages, only one is a recording type. Three non- <br />recording precipitation stations are situated within <br />the Mill Creek watershed, three are in the Big Cotton- <br /> <br />wood Creek drainage, and two are on Little Cotton- <br />wood Creek. The single recording precipitation sta- <br />tion (y{-9, Figure 2.7) is situated on Cottonwood <br />Creek. A Thiessen nelwork (Figure 2.7) was used 10 <br />estimate average precipitation on the three water- <br />sheds_ <br /> <br />Table 2.3. Characteristics of the main drainage channels of Mi/~ Big Cottonwood, and Little Cottonwood <br /> Creeks within the urbanizing portions of the study area. <br /> Length of <br />Sub- Channel With- <br />Zone* Area in Subzone Width" Slopes Manning's <br />(Figure 2.3) (milesZ ) d (feet) b (feet) fl/fl" n" <br />Mill Creek <br />SW[ 2.20 9200 30 0.0370 0.037 <br />SWz 1.95 5600 30 0.0228 0.037 <br />SW3 1.94 4400 30 0.0284 0.037 <br />SW4 2.49 7400 30 0.0250 0.037 <br />SWs 2.02 5400 30 0.0018 0.037 <br />SW6 1.70 4400 30 0.0043 0.037 <br />SW7 2.53 6000 30 0.0017 0.037 <br />14.83 <br />Big Cottonwood Creek <br />SW[ 6.86 9800 30 0.0586 0.037 <br />SWz 5.37 3800 30 0.0036 0.037 <br />SW3 7.29 8800 30 0.0057 0.037 <br />SW4 2.61 9600 30 0.0052 0.037 <br />SWs 1.18 8600 30 0.0020 0.037 <br />23.31 <br />Little Cottonwood Creek <br />SW[ 1.88 8200 30 0.0250 0.037 <br />SWz 1.94 3900 30 0.0141 0.037 <br />SW3 2.21 11800 30 0.0067 0.037 <br />SW4 2.41 3800 30 0.0053 0.037 <br />SWs 1.51 2000 30 0.0050 0.037 <br />9.95 <br />aAverage values for the sub zones <br /> <br />21 <br />