2008-12-04_PERMIT FILE - C1994082 ‎(22)‎

• Permit No: C1994082
• IBM Index Class Name: Permit File
• Doc Date: 12/4/2008
• Doc Name: Emergency Spillway Outflow Channel Requirements for Postmine Conditions
• Section_Exhibit Name: Tab 13 Attachment 13-20.1 Appendix 13-20.1-C
• Media Type: D
• Archive: No

SEDCAD 4.0
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Po~a~ 01~v Er~~~~~~r S~ill~vay Cr-ash - Ov5% Sloe
Material: Grass mixture
i

Trapezoidal Channel

Left Right
Bottom
Retardance Freeboard
Freeboard Freeboard
Limiting
Sideslope Sideslope Slope (%)
Width (ft) Ratio Ratio Classes Mult. x
Depth (ft) % of Depth Velocity

(fPs)
(VxD)
12.00 3.0:1 3.0:1 0.5 D, B 1.00 I 5.0
Stability
Class D w/o
Freeboard Stability
Class D w/
Freeboard Capacity
Class B w/o
Freeboard Capacity
Class B w/
Freeboard
Design Discharge: 4.60 cfs 4.60 cfs
Depth: 0.48 ft 1.48 ft 1.03 ft 2.03 ft
Top Width: 14.87 ft 20.87 ft 18.16 ft 24.16 ft
Velocity: 0.71 fps 0.30 fps
X-Section Area: 6.44 sq ft 15.47 sq ft
Hydraulic Radius: 0.428 0.837
Froude Number: 0.19 0.06
Roughness Coefficient: 0.0837 0.3144
•
SEDCAD Utility Run
TR-37
Printed 02-19-2008
13-20.1-C.1 Revised 02/08