2008-12-11_PERMIT FILE - C1980007A ‎(27)‎

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

SEDCAD 4 for Windows
Structure #3 (Erodible Channe/1
• DNSSA-2
K 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)
2.5:1 2.5:1 2.5 0.0350 0.30 5.0
Erodible Channel Results:
w/o Freeboard w/ Freeboard
Design Discharge: 1.54 cfs
Depth: 0.49 ft 0.79 ft
Top Width: 2.47 ft 3.97 ft
Velocity: 2.52 fps
X-Section Area: 0.61 sq ft
Hydraulic Radius: 0.229 ft
Froude Number: 0.89
Structure #2 (Erodible Channe/)
DNSSA-3

Trapezoidal Erodible Channel Inputs:
Material: Cobbles and shingles
Bottom Left Right Freeboard Freeboard Freeboard Limiting
Sideslope Sideslope Slope (%) Manning's n
Width (ft) R
ti
ti
R Depth (ft) % of Mult. x
Depth Velocity
(fps)
a
o
a
o (VxD)
2.00 1.0:1 1.0:1 2.5 0.0350 0.30 5.0
Erodible Channel Results:
w/o Freeboard w/ Freeboard
Design Discharge: 4.11 cfs
Depth: 0.49 ft 0.79 ft
Top Width: 2.97 ft 3.57 ft
Velocity: 3.40 fps
X-Section Area: 1.21 sq ft
Hydraulic Radius: 0.358 ft
Froude Number: 0.94
0 Structure #1(Pond)
Filename: NSSA.sc4 Printed 10-21-2008