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CULVERT 133 <br />Subdrainage Area - Graphical Peak Discharge <br />1. Data: <br />Drainage area: .................... A = 4.8400 Acres <br />Runoff Curve Number: ............. CN = 83 <br />Time of Concentration: ........... Tc = 0.12 <br />Storm Type: ....................... = II <br />Pond and swamp areas spread <br />throughout watershed ............... = 0.00 percent of A <br />2. Frequency ........................yr = 25 <br />3. Rainfall,P(24- hour) .............. in = 2.40 <br />4. Initial abstraction, la............ = 0.4096 <br />5. Compute la /P ....................... = 0.1707 <br />6. Unit peak discharge, qu ...... csm /in = 925.07 <br />7. Runoff ,Q .........................in = 0.9809 <br />8. Pond & swap adjustment factor .... Fp = 1.00 <br />9. Peak Discharge,gp ...............cfs = 6.8625 <br />Culvert Design <br />Design Parameters <br />Section <br />Shape: Circular <br />Material: Corrugated Metal <br />Diameter: 15.00 in <br />Manning's n: 0.0250 <br />Number of Barrels: 1 <br />Inlet <br />Inlet Type: 45- Degree Bevels <br />Ke: 0.20 <br />Revised June 2011 (TR -60) Attachment 2.05.3(3) -1 -85 <br />