2007-10-30_PERMIT FILE - C1982057A ‎(4)‎

• Permit No: C1982057A
• IBM Index Class Name: Permit File
• Doc Date: 10/30/2007
• Doc Name: Postmine Drainage Channel Design
• Section_Exhibit Name: Tab 20 Attachment 20-1
• Media Type: D
• Archive: Yes

SEDCAD 4.0
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Channel 005-W-1 - 25% Slope
Material: Grass Mixture
Triangular Channel
Left Right
Retardance Freeboard Freeboard Freeboard Limiting
Velocity
Sideslope Sideslope Slope (%)
Classes Mult. x
Depth (ft) % of Depth (VxD) (fps)
Ratio Ratio
3.0:1 3.0:1 25.0 D, 6 0.30 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: 1.00 cfs 1.00 cfs
Depth: 0.33 ft 0.63 ft 0.56 ft 0.86 ft
Top Width: 2.01 ft 3.81 ft 3.39 ft 5.19 ft
Velocity: 2.97 fps 1.04 fps
X-Section Area: 0.34 sq ft 0.96 sq ft
Hydraulic Radius: 0.159 0.268
Froude Number: 1.28 0.35
Roughness Coefficient: 0.0733 0.2955

SEDCAD Utility Run
Printed 08-23-2007
TR-59 20-1-61B Revised 08/07