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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57
Triangular Erodible Channel Inputs:
Material: Graded silts to cobbles when colloidal
Left Right Freeboard Freeboard Freeboard Limiting
Sideslope Sideslope Slope (%) Manning's n Mult. x Velocity
Ratio Ratio Depth (ft) % of Depth (VxD) (fps)
2.0:1 2.0:1 2.0 0.0300 0.30 - 5.5
Erodible Channel Results:
w/o Freeboard w/ Freeboard
Design Discharge: 0.91 cfs
Depth: 0.44 ft 0.74 ft
Top Width: 1.76 ft 2.96 ft
Velocity: 2.37 fps
X-Section Area: 0.39 sq ft
Hydraulic Radius: 0.196 ft
Froude Number: 0.89
Structure #97 (Erodible Channel)
D2-10A
Triangular Erodible Channel Inputs:
Material: Cobbles and shingles
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 27.0 0.0600 0.30 5.5
Erodible Channel Results:
w/o Freeboard w/ Freeboard
Design Discharge: 0.91 cfs
Depth: 0.30 ft 0.60 ft
Top Width: 1.78 ft 3.58 ft
Velocity: 3.49 fps
X-Section Area: 0.26 sq ft
Hydraulic Radius: 0.141 ft
Froude Number: 1.60
Structure #96 (Erodible Channel)
D2-9
0 Triangular Erodible Channel Inputs:
Filename: MB-2R.sc4 Printed 10-23-2008