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
54
•
Structure Detail.,
Structure #58 (ftetated Channe/)
D2-6E
Triangular Vegetated Channel Inputs:
Material: Grass mixture
Left Right Retardance Freeboard
Freeboard Freeboard Limiting
9
Sideslope Sideslope Slope (%) Classes
i
R Mult. x
Depth (ft) % of Depth Velocity
(fps)
at
o
Ratio (VxD)
2.0:1 2.0:1 22.2 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: 0.32 cfs 0.32 cfs
Depth: 0.28 ft 0.58 ft 0.51 ft 0.81 ft
Top Width: 1.13 ft 2.33 ft 2.04 ft 3.24 ft
Velocity: 1.99 fps 0.61 fps
X-Section Area: 0.16 sq ft 0.52 sq ft
Hydraulic Radius: 0.127 ft 0.228 ft
Froude Number: 0.93 0.21
Roughness
Coefficient: 0.0888 0.4255
Structure #68 (Erodible Channel)
D2-6F
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)
1.0:1 2.0:1 13.2 0.0300 0.30 5.5
Erodible Channel Results:
•
w/o Freeboard w/ Freeboard
Design Discharge: 0.35 cfs
Depth: 0.25 ft 0.55 ft
Top Width: 0.74 ft 1.64 ft
Velocity: 3.96 fps
Filename: MB-2R.sc4 Printed 10-23-2008