2008-12-11_PERMIT FILE - C1980007A ‎(21)‎

• 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-2R
• Media Type: D
• Archive: Yes

SEDCAD 4 for Windows
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90
Design Discharge = 48.01 cfs
i Minimum pipe diameter: 1 - 36 inch pipe(s) required
Structure #11 (Erodible Channe/)
D2R-1A
Triangular Erodible Channel Inputs:
Material: Graded silts to cobbles when colloidal
Left Right Freeboard Freeboard Freeboard Limiting
Sideslope Sideslope Slope (%) Manning's n Depth (ft) % of Mult. x
Depth Velocity
(fps)
Ratio Ratio (VXD)
2.0:1 2.0:1 2.2 0.0300 0.30 5.5
C7
Erodible Channel Results:
w/o Freeboard w/ Freeboard
Design Discharge: 1.79 cfs
Depth: 0.56 ft 0.86 ft
Top Width: 2.22 ft 3.42 ft
Velocity: 2.91 fps
X-Section Area: 0.62 sq ft
Hydraulic Radius: 0.248 ft
Froude Number: 0.97
Structure #12 (Nonerodible Channe/)
D2R-4C
Triangular Nonerodible Channel Inputs:
Material: Shotcrete
Left Right Freeboard Freeboard Freeboard
Sideslope Sideslope Slope (%) Manning's n Mult. x
Depth (ft) % of Depth
Ratio Ratio (VxD)
2.0:1 2.0:1 4.0 0.0170 0.30
Nonerodible Channel Results:
•
w/o Freeboard w/ Freeboard
Design Discharge: 1.31 cfs
Depth: 0.36 ft 0.66 ft
Top Width: 1.42 ft 2.62 ft
Velocity: 5.15 fps
X-Section Area: 0.25 sq ft
Hydraulic Radius: 0.159 ft
Froude Number: 2.15
Filename: MB-2R.sc4 Printed 10-23-2008