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

87
Left Right Freeboard Freeboard Freeboard Limiting
Sideslope Sideslope Slope (%) Classes
Classes
Depth (ft) % of Depth Mult. x Velocity

(fps)
Ratio Ratio (VxD)
4.0:1 2.0:1 51.0 D, B 0.30 5.0 •
Vegetated Channel Results:
Stability
Class D w/o
Freeboard Stability
Class D w/
Freeboard Capacity
Class B w/o
Freeboard Capacity
Class B w/
Freeboard
Design Discharge: 0.33 cfs 0.33 cfs
Depth: 0.21 ft 0.51 ft 0.37 ft 0.67 ft
Top Width: 1.25 ft 3.05 ft 2.24 ft 4.04 ft
Velocity: 2.55 fps 0.79 fps
X-Section Area: 0.13 sq ft 0.42 sq ft
Hydraulic Radius: 0.099 ft 0.177 ft
Froude Number: 1.39 0.32
Roughness
Coefficient: 0.0889 0.4258
Structure #19 (Erodible Channel)
D2R-48
. 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
Depth (ft) % of Depth Velocity
(fps)
Ratio Ratio (VxD)
2.0:1 2.0:1 5.0 0.0300 0.30 5.5
Erodible Channel Results:
w/o Freeboard w/ Freeboard
Design Discharge: 2.50 cfs
Depth: 0.54 ft 0.84 ft
Top Width: 2.15 ft 3.35 ft
Velocity: 4.30 fps
X-Section Area: 0.58 sq ft
Hydraulic Radius: 0.241 ft
Froude Number: 1.46
Structure #18 (Erodible Channel)
D2R-4
• Trapezoidal Erodible Channel Inputs:
Filename: MB-2R.sc 4 Printed 10-23-2008