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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55
•
w/o Freeboard w/ Freeboard
X-Section Area: 0.09 sq ft
Hydraulic Radius: 0.103 ft
Froude Number: 1.99
Structure #57 (V etated Channel1
D2-6D
Triangular Vegetated Channel Inputs:
Material: Grass mixture
Left Right Retardance Freeboard Freeboard Freeboard Limiting
Sideslope Sideslope Slope (%) Classes Mult. X Velocity
Ratio Ratio Depth (ft) % of Depth (VxD) (fps)
2.0:1 2.0:1 17.4 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: 0.99 cfs 0.99 cfs
Depth: 0.42 ft 0.72 ft 0.69 ft 0.99 ft
Top Width: 1.67 ft 2.87 ft 2.77 ft 3.97 ft
Velocity: 2.85 fps 1.03 fps
X-Section Area: 0.35 sq ft 0.96 sq ft
Hydraulic Radius: 0.186 ft 0.310 ft
Froude Number: 1.10 0.31
Roughness
Coefficient: 0.0707 0.2753
Structure #100 (Cu/vent)
C2-15
Culvert Inputs:
Culvert Results:
Max. Tailwater Entrance
Length (ft) Slope (%) Manning's n Headwater (ft) Loss Coef.
(ft) (Ke)
30.00 27.27 0.0240 1.50 0.00 0.9c
Design Discharge = 1.31 cfs
Minimum pipe diameter: 1 - 8 inch pipe(s) required
Structure #69 (Erodible Channe/)
Filename: MB-2R.sc4 Printed 10-23-2008