2008-12-11_PERMIT FILE - C1980007A ‎(24)‎

• Permit No: C1980007A
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2008
• Doc Name: 10 Year, 24 Hour Surface Water Control Plan
• Section_Exhibit Name: Exhibit 66 Pond MB-3
• Media Type: D
• Archive: Yes

SEDCAD 4 for Windows
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18
Structure #16 (Culvert)
C3-4A
Culvert Inputs:
Design Discharge = 2.05 cfs
Minimum pipe diameter: 1 - 12 inch pipe(s) required
Structure #14 (Erodible Channel)
D3-2
Triangular Erodible Channel Inputs:
Material: Graded silts to cobbles when colloidal
Culvert Results:
•
Left Right Freeboard Freeboard Freeboard Limiting
Sideslope Sideslope Slope (%) Manning's n Mult. x Velocity
Ratio Ratio Depth (ft) % of Depth (VxD) (fps)
3.0:1 3.0:1 6.0 0.0300 0.30 5.5
Erodible Channel Results:
w/o Freeboard w/ Freeboard
Design Discharge: 2.74 cfs
Depth: 0.46 ft 0.76 ft
Top Width: 2.74 ft 4.54 ft
Velocity: 4.38 fps
X-Section Area: 0.62 sq ft
Hydraulic Radius: 0.216 ft
Froude Number: 1.62
u
Structure #12 (Cu/vent)
C3-2
Culvert Inputs:
Max. Entrance
Length (ft) Slope (%) Manning's n Headwater Tailwater Loss Coef.
(ft) (ft) (Ke)
12.00 5.00 0.0120 1.00 0.00 0.90
Max. Tailwater Entrance
Length (ft) Slope (%) Manning's n Headwater Loss Coef.
(ft) (ft) (Ke)
262.00 5.00 0.0120 3.00 0.00 0.90
Culvert Results:
Filename: MB-3.sc4 Printed 10-17-2008