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Peak Discharge Calculations <br />Graphical Peak Discharge <br />Project: Vagneur By: BL <br />Location: Pitkin County Checked: <br />Developed <br />1. Data: <br />Drainage area: .................... A = 6.5000 Acres <br />Runoff Curve Number: ............. CN = 75 <br />Time of Concentration: ........... Tc = 0.25 <br />10/29/2007 15:07 <br />Date: 10/29/07 <br />Date: <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 = 2.60 <br />4. Initial abstraction, la ............ = 0.6667 <br />5. Compute Ia/P ....................... = 0.2564 <br />6. Unit peak discharge, qu...... csm/in = 653.97 <br />7. Runoff,Q .........................in = 0.7097 <br />8. Pond & swap adjustment factor,...Fp = 1.00 <br />9. Peak Discharge,gp ...............cfs = 4.7138