PERMFILE112710

• Permit No: C1981029
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: APPENDIX 2.05.3-5B RIPRAP & CULVERT VELOCITY CALCULATIONS
• Media Type: D
• Archive: No

APPENDIX 2.05.3-58 (Continued)
•
Culvert No. 3
Da = 1.5 Q = 1.45 cfs
Qn
Yo~Sp~
(1.45)(.024)
Y~~.05~
(1.45)(.024) _ .22Y~
Y ~ _ .16
Yo = .50
Yo .33
D
• ~ _ .2260
do
A = .51
R = .1847
D
R = .28
y = 1.49 (R) 2 (SI )
n ~ ~
V 1024 ( • 28) ~. (.05 ) ~
V = 1.4~ (.43)(.22)
V = 5.8 fps
•
S = .05 Ft/Ft n = .024
Da =pipe diameter in feet
Q =peak discharge (cubic ft/second)
So = slope
R =hydraulic radius
A =cross-sectional area
n =Manning coefficient (n) (.024)
V =velocity
- 238 - (Rev. 5/86)