2008-12-11_PERMIT FILE - C1980007A ‎(29)‎

• 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 RPE Pond
• Media Type: D
• Archive: Yes

SEDCAD 4 for Windows
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Max. Tailwater Entrance
Length (ft) Slope (%) Manning's n Headwater (ft) Loss Coef.
(ft) (Ke)
20.00 5.00 0.0240 3.75 0.00 0.91
Culvert Results:
Design Discharge = 15.38 cfs
Minimum pipe diameter: 1 - 21 inch pipe(s) required
Structure #4 &od/b/e Channel)
DRPE-1
Triangular Erodible Channel Inputs:
Material: Cobbles and shingles
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 9.0 0.0350 0.30 5.5
•
Max. Tailwater Entrance
Length (ft) Slope (%) Manning's n Headwater (ft) Loss Coef.
(ft) (Ke)
20.00 5.00 0.0240 1.50 0.00 0.90
Culvert Results:
Design Discharge = 2.02 cfs
Minimum pipe diameter: 1 - 10 inch pipe(s) required
Structure #Z (Nonerodib/e Channe/)
11
Erodible Channel Results:
w/o Freeboard w/ Freeboard
Design Discharge: 2.02 cfs
Depth: 0.47 ft 0.77 ft
Top Width: 1.89 ft 3.09 ft
Velocity: 4.52 fps
X-Section Area: 0.44 sq ft
Hydraulic Radius: 0.211 ft
Froude Number: 1.64
Structure #3 (Cu/vent)
CRPE-1
Culvert Inputs:
Filename: RPE(expanded).sc4 Printed 10-23-2008