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-D8
2. Description: Diversion ditch
3. Ditch GYade: Ll percent
4. Area Drained: 33 acres
5. Peak Discharge: (44)(1.12)(1.14) = 56
6. Ditch Design:
Ditch Lining Axk
n = .045
Use ditch w/"V" walls 1:2 slope
A = 2
P = 4.472D
F~3 = A/P = .4472D
Q = (1.49/n)(A)(RH)2/3(gl/-2)
•
D = 2.67 4
~ 38.39 (S)•
D = 2.67 11
38.39 (. 11}-~
D = 1.75 feet
Use 2.25 feet deep with freeboard.