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DITCH DESIGN <br />FROM STA. 0+00 TO CULVERT 39A <br />PEAK FLOW: 9 cfs <br />MAX SLOPE: 5.1% <br />MIN SLOPE: 5.7% <br />SIZE DITCH: d = 9 035 3/B = 0.90 ft. <br />1.74 :057 J <br />ADD .1 FT. FREEBOARD SO d = 1.0 ft. <br />CHECK VELOCITY: v = 2(99 = 5,5 ft./sec. OK! <br />FROM STA. 12+43 TO CULVERT 40b <br />PEAK FLOW: 33 cfs <br />MAX SLOPE: 5.2% <br />MIN SLOPE: 2.1% <br />SIZE DITCH: d = 1.74 .021 ] 3/8 = 1.B ft. <br />ADD .2 FT. FREEBUARD SO d = 2.0 ft. <br />CHECK VELOCITY: d = [,74 .052 13/8- 1.5 ft. <br />v = 2(135 Z= 7.3 ft./sec. OK! <br />• <br />• <br />• ~i <br />12-6-4 <br />