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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88
Material: Graded silts to cobbles when colloidal
•
Left Right Freeboard Freeboard Freeboard Limiting

g 's n
Width Bottom (ft) Sideslopa Sideslopa Slope (%) Mannin
Depth (ft) % of Depth Mult. X
Velocity
(fps)
Ratio Ratio (VxD)
2.00 2.0:1 4.0:1 5.1 0.0300 0.30 5.5
Erodible Channel Results:
w/o Freeboard w/ Freeboard
Design Discharge: 1.63 cfs
Depth: 0.19 ft 0.49 ft
Top Width: 3.16 ft 4.96 ft
Velocity: 3.25 fps
X-Section Area: 0.50 sq ft
Hydraulic Radius: 0.155 ft
Froude Number: 1.44
0
Structure #17 (Culvert)
C2R-2A
Culvert Inputs:
Max. Entrance
Tailwater
Length (ft) Slope (%) Manning's n Headwater (ft) Loss Coef.
(ft) (Ke)
212.00 19.00 0.0120 3.75 0.00 0.9(
Culvert Results:
Design Discharge = 4.13 cfs
Minimum pipe diameter: 1 - 10 inch pipe(s) required
Structure #16 (R/erap Channel)
D2R-2
Trapezoidal Riprap Channel Inputs:
Material: Riprap
Left Right Freeboard Freeboard Freeboard
Bottom Sideslope Sideslope Slope (%)
Mult. x
Width (ft)
Ratio Ratio Depth (ft) % of Depth
(VxD)
1.00 2.0:1 2.0:1 46.9 0.30
Riprap Channel Results:
PADER Method - Mild Slope Design
r--7
61111
Filename: MB-2R.sc4 Printed 10-23-2008