2023-04-19_PERMIT FILE - C1981010 ‎(112)‎

• Permit No: C1981010
• IBM Index Class Name: Permit File
• Doc Date: 4/19/2023
• Doc Name: N-Pit Diversion 25-year, 24-Hour Event AMC II
• Section_Exhibit Name: Appendix Q Section XVII
• Media Type: D
• Archive: No

SEDCAD 4 for Windows
5
Structure Detail:
Structure #1 (Erodible Channel
Segment 1
Trapezoidal Erodible Channel Inputs:
Material: Graded silts to cobbles when colloidal
Bottom Left Right Freeboard Freeboard Freeboard Limiting
Sideslope Sideslope Slope(%) Manning s n Mult.x Velocity
Width(ft} Ratio Ratio Depth(ft) %of Depth (VxD) (fps)
20.00 2.0:1 2.0:1 2.3 0.0300 1.00 5.5
Erodible Channel Results:
w/o Freeboard w/Freeboard
Design Discharge: 15.61 cfs
Depth: 0.26 ft 1.26 ft
Top Width: 21.03 ft 25.03 ft
Velocity: 2.96 fps
X-Section Area: 5.28 sq ft
Hydraulic Radius: 0.250 ft
Froude Number: 1.04
Structure #2(Erodible Channell
Segment 2
Trapezoidal Erodible Channel Inputs:
Material: Graded silts to cobbles when colloidal
Left Right Freeboard Limiting
Bottom g � Freeboard Freeboard g
Sideslope Sideslope Slope(%) Manning s n Mult,x Velocity
Width(ft} Ratio Ratio Depth(ft) %of Depth (VxD) (fps)
20.00 2.0:1 2.0:1 7.5 0.0300 1.00 5.5
Erodible Channel Results:
w/o Freeboard w/Freeboard
Design Discharge: 26.97 cfs
Depth: 0.25 ft 1.25 ft
Top Width: 21.00 ft 25.00 ft
Velocity: 5.28 fps
F77:X-�Seion Area: 5.11 sq ft EEI
Filename: N-Pit Diversion Project-added another segment to refine riprap requirements-25.24-OSM.Simons.sc4 Printed 09-17-2020