PERMFILE105841

• Permit No: C1981048
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: EXHIBIT V-3
• Media Type: D
• Archive: No

Ditch Design

1. Ditch: 22-D7
2. Description: Diversion ditch
3. Ditch c~ade: 4 percent
4. Atea Drained: 11
5. Peak Discharge: 18(1,12)(1.12) = 22.58
6. Ditch Design:
Ditch Lining Emck
n = .045
Use di~.ch w/"V" wa.11s 1:2 slope
A=2
P = 4.472D
~I = A/P = .4472D
Q = (1.49/n)(A)(RH)2/3 (S1/2)

D = 2.67 4
~ 38.39 (S)•
D = 2.67 22.58
38.39 (.04)•~
D = 1.5 feet
Use 2.0 feet deep with freeboard.