Laserfiche WebLink
Ditch C23 <br />See Pond 009 design in Attachment 2.05.3(3)-30 for ditch design <br />l)it,-h r7Q <br />Time of Concentration (SCS Method) <br />Curve Number: 82 <br />Length of Flow (ft): 843.77 <br />Average Land Slope (percent): 11.7 <br />Time of Concentration (hrs): 0.13 <br />Graphical Peak Discharge <br />Project: NUCLA MINE By: GL Date: 02/17/06 <br />Location: DITCH C24 Checked: Date: <br />Developed <br />1. Data: <br />Drainage area: .................... A = 2.1000 Acres <br />Runoff Curve Number: ............. CN = 82 <br />Time of Concentration: ........... Tc = 0.13 <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 />4. Initial abstraction, Ia............ = 0.4390 <br />5. Compute Ia/P....................... = 0.1463 <br />6. Unit peak discharge, qu...... csm/in = 908.33 <br />7. Runoff,Q.........................in = 1.3790 <br />8. Pond & swap adjustment factor,...Fp = 1.00 <br />9. Peak Discharge,gp...............cfs = 4.1100 <br />Channel Type: Trapezoidal, Equal Side Slopes <br />Dimensions: Left Side Slope 2.00:1 <br />Right Side Slope 2.00:1 <br />Base Dimension: 0.00 <br />Wetted Perimeter: 3.52 <br />Area of Wetted Cross Section: 1.24 <br />Discharge: 4.10 cfs <br />Depth of Flow: 0.79 feet <br />Velocity: 3.30 fps <br />Channel Lining: EARTH <br />Freeboard: 0.30 feet <br />Attachment 2.05.3(3)-1 Page 23 March 2016 (TR -70) <br />