2010-12-08_PERMIT FILE - C1981008A ‎(6)‎

• Permit No: C1981008A
• IBM Index Class Name: Permit File
• Doc Date: 12/8/2010
• 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

Time of Concentration: ........... Tc = 0.18
Storm Type: ....................... =11
Pond and swamp areas spread
throughout watershed ............... = 3.00 percent of A
0.3030 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 = 746.29
7. Runoff, Q .........................in = 0.4844
8. Pond & swap adjustment factor .... Fp = 0.75
9. Peak Discharge,gp ...............cfs = 4.2787
CULVERT 110
Time of Concentration (SCS Method)
Curve Number: 79
Length of Flow (ft): 1172.10
Average Land Slope (percent): 8.06
Revised August 2009(PB06) Attachment 2.05.3(3) -1 -77