2011-07-26_PERMIT FILE - C1982057 ‎(3)‎

• Permit No: C1982057
• IBM Index Class Name: Permit File
• Doc Date: 7/26/2011
• Doc Name: Postmine Drainage Channel Design
• Section_Exhibit Name: Tab 20 Attachment 20-1
• Media Type: D
• Archive: No

SEDCAD 4.0
r`nn~irinhf 1 QOR P~mola 1 Crhuinh
Channel 005-E1: Reach NN-LL - 6% Slope
Material: Riprap
Trapezoidal Channel
Left Right
o Freeboard Freeboard Freeboard
(ft) Sideslope Sideslope Slope (%)
Width Depth (ft) % of Depth Mult. x
Ratio Ratio (VxD)
2.00 3.0:1 3.0:1 6.0 0.30
PADER Method -Steep Slope Design
w/o Freeboard w/ Freeboard
Design Discharge: 7.70 cfs
Depth: 0.49 ft 0.79 ft
Top Width: 4.95 ft 6.75 ft
Velocity: 4.51 fps
X-Section Area: 1.71 sq ft
Hydraulic Radius: 0.334
Froude Number: 1.35
Manning's n: 0.0390
Dmin: 2.00 in
D50: 3.00 in
Dmax: 4.50 in
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SEDCAD Utility Run
TR-59
20-1-60
Printed 05-21-2007
Revised OS/07