PERMFILE66875

• Permit No: C1981016
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: Sedimentation Control & Diversion Structure Calculations
• Section_Exhibit Name: APPENDIX XXI to Section XXI.8
• Media Type: D
• Archive: No

_ Y2
A 2 (tanOC+ tan ~ )
• X7= Y tan 0:
X2= Y tan
3/5
3. A = Q = 14.Oft/S - 4.Oft2
N V (P) (S) 4.Oft/S
N = 0.08
(4.0 ft2)2/3(0.1)Z
(7.llft)
A roughness of 0.08 could be accomplished by lining with vegetation of
fist sized gravel which would be nonerosive at velocity of 4.Oft/S
4. Freeboard
•
2
2.5' - 1.2' = 1.3'
2.5'
C7