PERMFILE113314

• Permit No: C1981008A
• IBM Index Class Name: Permit File
• Doc Date: 7/30/2007
• Doc Name: Collection/Diversion Ditches and Culverts Design Parameters
• Section_Exhibit Name: Section 2.05.3‎(3)‎ Attachment 2.05.3‎(3)‎-1
• Media Type: D
• Archive: Yes

• Present
1. Data:
Drainage area :....................A = 226.8000 Acres
Runoff Curve Number :.............CN = 78
Time of Concentration:...........Tc = 1.21
Storm Type :....................... = II
Pond and swamp areas spread
throughout watershed ............... = 1.00 percent of A
2.2680 Acres
• 2. Frequency ........................yr = 10
3. Rainfall,P(24-hour) ..............in = 2.00
4. Initial abstraction, la............ = 0.5641
5. Compute la/P ....................... = 0.2821
6. Unit peak discharge, qu......csm/in = 267.92
7. Runoff,Q .........................in = 0.4844
8. Pond & swap adjustment factor,...Fp = 0.87
9. Peak Discharge,gp ...............cfs = 40.0117
• REVISED MARCH 2006 Attachment 2.05.3(3)-1-69