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<br />Data for CENTERVILLE PROP DRAINAGE 10-24-00 <br />TYPE II 24-HOUR RAINFALL= 5.90 IN <br />Prepared by James R.Hill, Inc. <br />HvdroCAD 5.11 000744 (c) 1986-1999 Applied Microcomputer Systems <br /> <br />Page 5 <br /> <br />26 Oct 00 <br /> <br />SUBCATCHMENT 180 <br />PEAK= 6.43 CFS @ 12.16 HRS, VOLUME = .59 AF <br />ACRES CN <br />.17 98 IMPERVIOUS <br />.85 88 WETLAND <br />1.25 61 GRASS <br />2.27 74 <br /> <br />SCS TR-20 METHOD <br />TYPE II 24-HOUR <br />RAINFALL= 5.90 IN <br />SPAN= 0-40 HRS, dt=.l HRS <br /> <br />Method <br />DIRECT ENTRY <br />TR-55 SHEET FLOW <br />Grass: Dense n=.24 <br /> <br />L=200' <br /> <br />Comment <br />ROOF TO <br />Segment <br />P2=2.7 in <br /> <br />GROUND <br />ID: <br />s=.025 <br /> <br />Tc (min) <br />2.0 <br />24.7 <br /> <br />'/ ' <br /> <br />Total Length= 200 ft <br /> <br />Total Tc= <br /> <br />26.7 <br /> <br />SUBCATCHMENT 190 <br />PEAK= 29.39 CFS @ 12.07 HRS, VOLUME= 2.21 AF <br />ACRES CN <br />.26 98 IMPERVIOUS <br />6.06 78 WETLAND WITH SOME WOODS <br />2.24 61 GRASS <br />8.56 74 <br /> <br />SCS TR-20 METHOD <br />TYPE II 24-HOUR <br />RAINFALL= 5.90 IN <br />SPAN= 0-40 HRS, dt=.l HRS <br /> <br />Method <br />CURVE NUMBER (LAG) METHOD <br />L=650' s=.02 'I' <br /> <br />Comment <br />Segment ID: <br /> <br />Tc (min) <br />19.0 <br /> <br />SUBCATCHMENT 200 <br /> <br />OFF SITE FLOWING TO SOUTH LINE <br /> <br />PEAK= 23.99 CFS @ 12.29 HRS, VOLUME= 2.72 AF <br /> <br />ACRES <br />14.30 <br /> <br />CN <br />65 <br /> <br />UPLAND/OPEN MEADOW <br /> <br />SCS TR-20 METHOD <br />TYPE II 24-HOUR <br />RAINFALL= 5.90 IN <br />SPAN= 0-40 HRS, dt=.l HRS <br /> <br />Method <br />CURVE NUMBER (LAG) METHOD <br />L=500' s=.Ol 'I' <br />RECT/VEE/TRAP CHANNEL <br />W=2' D=2.5' SS= .25 'I' <br />s=.0015 '/' n=.05 V=1.39 <br /> <br />Comment <br />Segment ID: <br /> <br />Tc (min) <br />27.8 <br /> <br />Segment ID: <br />a=30 sq-ft Pw=22.6' r=1.327' <br />fps L=650' Capacity=41.7 cfs <br /> <br />7.8 <br /> <br />Total Length= 1150 ft <br /> <br />Total Tc= <br /> <br />35.6 <br />