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-D4 (l~vised 10/3/80)
2. Description: Diversion ditch
3. Ditch (made: 2 percent
4. Area Drained: 24.67 acres
5. Peak Discharge: (1.12(38)(1.11) = 47.24 cfs
6. Ditch Design:
Ditch Lining Fmck
n = .045
Use ditch w/"V" walls 1:2 slope
A=2
P = 4.472D
FIIi = A/P = .4472D
Q = (1.49/n) (A) (RS) 2/3 (gl/2)
D = 2.67 4
38,39 (S)-
D = 2.67 24.67
38.39 (.02)•
D = 1.76 feet deep
Use 2.25 feet deep with fx~eboard.