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
Rnrn.rinhf ~QOii Pamela 1 Crh.erah
Channel 005-Gulch: Reach MM-LL - 2% Slope
Material: Grass mixture
Triangular Channel
Left Right
° Retardance Freeboard Freeboard Freeboard Limiting
Velocity
Sideslope Sideslope Slope (/o)
Classes Mult. x
Depth (ft) % of Depth
(fps)
Ratio Ratio (VxD)
3.0:1 3.0:1 2.0 D, B 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: 6.70 cfs 6.70 cfs
Depth: 1.00 ft 1.30 ft 1.55 ft 1.85 ft
Top Width: 6.00 ft 7.80 ft 9.31 ft 11.11 ft
Velocity: 2.23 fps 0.93 fps
X-Section Area: 3.00 sq ft 7.22 sq ft
Hydraulic Radius: 0.474 0.736
Froude Number: 0.56 0.19
Roughness Coefficient: 0.0573 0.1848
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SEDCAD Utility Run Printed 05-21-2007
TR-59 20-1-54 Revised 05/07