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
f'-...;nM 4000 1Jnn7 D-1. I CnL....?4.
87
Left
. Right Retardance Freeboard Freeboard FFeeboard Limiting
Sideslope Sideslope Slope (%) Classes Mult. x Velocity
Ratio Ratio Depth (ft) % of Depth (VxD) (fps)
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: 0.49 cfs 0.49 cfs
Depth: 0.23 ft 0.53 ft 0.41 ft 0:71 ft
Top Width: 1.40 ft 3.20 ft 2.45 ft, 4.25 ft
Velocity: 2.99 fps 0.97 fps_
X-Section Area: 0.16 sq ft 0.50 sq ft
Hydraulic Radius: 0.111 ft 0.194 ft
Froude Number: 1.54 0.38
Roughness
Coefficient: 0.0818 0.3639
L`
Structure #19 (Erodible Channel)
D2R-4B
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 5.0 0.0300 0.30 5.5
Erodible Channel Results:
w/o Freeboard w/ Freeboard
Design Discharge: 3.23 cfs
Depth: 0.59 ft 0.89 ft
Top Width: 2.37 ft 3.57 ft
Velocity: 4.59 fps
X-Section Area: 0.70 sq ft
Hydraulic Radius: 0.265 ft
Froude Number: 1.48
Structure #18 (Erodible Channe/)
D2R-4
Trapezoidal Erodible Channel Inputs:
Filename: MB-2R.sc4 Printed 10-23-2008