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<br /> -~- <br />I <br />I II-4 <br />I TABLE II-I <br /> RALSTON CREEK BASIN PARAMETERS <br />I Existing Future Overl and Overl and Streambed SCS <br /> Sub- Area Percent Percent Flow Length Slope Slope Curve <br />I Basin (sq .mi.) Imperv . Imperv . (feet) (feet) Percent Numbers <br /> I, 2001 <br /> 1 6.4 10 10 20 7 80 <br />I 2 4,0 10 10 900 45 4 80 <br /> 3 17.0 10 10 700 40 5 74 <br />I 4 2.9 15 15 1,2001 25 10 72 <br /> 5 1.5 15 15 1,2001 25 10 85 <br />I 6 8.6 15 15 1,000 50 7 75,83 <br /> 7 5.6 15 15 900 30 5 83 <br /> 8 2,4 10 18 1,100 18 15 80,85,87 <br />I 9 6.9 7 32 1,100 6 14 80,85 <br /> 10 4.2 5 8 1,2001 18 7 80 <br />I 11 4.8 5 17 1,100 12 2 80,85 <br /> 12 2.8 5 23 1,100 5 1 80,85 <br />I 13 4.1 20 41 120-1,2002 3 0.6 85 <br /> 14 3.8 0 0 850 40 9 64,71 <br />I 15 4.2 0 0 1,000 35 5 74 <br /> 16 2.2 4 5 400-500 3_102 3 75 <br /> 17 0.7 2 2 600 5-152 3 65,81 <br />I 18 1.2 5 17 400-9002 4-14 2 77,75 <br /> 19 0,8 5 10 600-900 1. 7-14 1_112 72,77 <br />I 20 0.5 5 37 1,000 2 1 72 <br /> 21 1.1 8 37 500 5 1 72 <br />I 22 0.2 5 37 700 5 1 72 <br /> 23 0.4 9 37 400 6 1 72 <br />I 24 0.5 6 37 700 4 1 72 <br /> 25 0.3 13 37 400 4 1 72 <br /> 26 1.2 21 37 700 3 1 72 <br />I 27 3.2 30 41 120 4 0.6 85 <br />1. Maximum overl and flow length used is 1,200 feet; defined channel generally occurs <br />I at greater lengths. <br />2. Varies by subcatchment. <br />I <br /> ------ <br />