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Discharge: 18.00 cfs <br />Depth of Flow: 0.60 feet <br />Velocity: 5.74 fps <br />Freeboard: 0.30 feet <br />MANNING'S N =.30 FOR GRASS CHANNEL <br />DITCH C13 <br />Time of Concentration (SCS Method) <br />Curve Number: 80 <br />Length of Flow (ft): 2047.49 <br />Average Land Slope (percent): 3.5 <br />Time of Concentration (hrs): 0.50 <br />DITCH C13 <br />Graphical Peak Discharge <br />Date: 02/16/06 <br />Location: DITCH C13 <br />Project: NUCLA MINE <br />Checked: Date: <br />Developed <br />1. Data: <br />Drainage area: .................... A = 21.1000 Acres <br />Runoff Curve Number: ............. CN = 80 <br />Time of Concentration: ........... Tc = 0.50 <br />Storm Type: ....................... = II <br />Pond and swamp areas spread <br />throughout watershed ............... = 0.00 percent of A <br />0.0000 Acres <br />2. Frequency ........................yr = 100 <br />3. Rainfall,P(24- hour) .............. in = 3.00 <br />Revised June 2011 JR -60) Attachment 2.05.3(3) -1 -24 <br />By: GL <br />