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
r--inh+ 4000 Ann? D-1 I Crhuro i.
58
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 1.5 0.0300 0.30 5.5
Erodible Channel Results:
w/o Freeboard w/ Freeboard
Design Discharge: 1.67 cfs
Depth: 0.58 ft 0.88 ft
Top Width: 2.32 ft 3.52 ft
Velocity: 2.48 fps
X-Section Area: 0.67 sq ft
Hydraulic Radius: 0.260 ft
Froude Number: 0.81
L?
Structure #95 (Cu/vert1
C2-9C
Culvert Inputs:
Max. Tailwater Entrance
Length (ft) Slope (%) Manning's n Headwater (ft) Loss Coef.
(ft) (Ke)
56.00 5.00 0.0240 1.00 0.00 0.9(
Culvert Results:
Design Discharge = 1.67 cfs
Minimum pipe diameter: 1 - 10 inch pipe(s) required
Structure #94 jErodible Channel)
D2-9B
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 10.0 0.0300 0.30 5.5
Erodible Channel Results:
w/o Freeboard w/ Freeboard
Design Discharge: 2.11 cfs
Depth: 0.44 ft 0.74 ft
Filename: MB-2R.sc4 Printed 10-23-2008