2008-12-11_PERMIT FILE - C1980007A ‎(22)‎

• Permit No: C1980007A
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2008
• Doc Name: 25 Year, 24 Hour Surface Water Control Plan
• Section_Exhibit Name: Exhibit 66 Pond MB-2R
• Media Type: D
• Archive: Yes

SEDCAD 4 for Windows
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Material: Graded silts to cobbles when colloidal
Bottom Left Right Freeboard Freeboard Freeboard` Limiting
Sideslope Sideslope Slope (%) Manning's n
Width (ft) Mult. X Velocity
Ratio Ratio Depth (ft) % of
Depth (VxD) (fps)
2.00 2.0:1 4.0:1 5.1 0.03001 0.30 5.5
Erodible Channel Results:
w/o Freeboard w/ Freeboard
Design Discharge: 2.09 cfs
Depth: 0.22 ft 0.52 ft
Top Width: 3.34 ft 5.14 ft
Velocity: 3.51 fps
X-Section Area: 0.59 sq ft
Hydraulic Radius: 0.174 ft
Froude Number: 1.47
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Structure #17 (Culvert)
C2R-2A
Culvert Inputs:
Max. Tailwater Entrance
Length (ft) Slope (%) Manning's n Headwater (ft) Loss Coef.
(ft) (Ke)
212.00 19.00 0.0120 3.75 0.00 0.90
Culvert Results:
Design Discharge = 5.31 cfs
Minimum pipe diameter: 1 - 12 inch pipe(s) required
Structure #16 (&_Drap Channel)
D2R-2
Trapezoidal Riprap Channel Inputs:
Material: Riprap
Left Right
° Freeboard Freeboard Freeboard
(ft) Sideslope Sideslope Slope (%)
Width Depth (ft) % of Depth Mult. x
Ratio Ratio (VxD)
1.00 2.0:1 2.0:1 46.9 0.30
Riprap Channel Results:
PADER Method --Steep-Slope Design
Filename: MB-2R.sc4 Printed 10-23-2008