PERMFILE133709

• Permit No: C1980005A
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: POST-MINING DRAINAGE CONTROL
• Section_Exhibit Name: TAB 7 APPENDIX 7-12
• Media Type: D
• Archive: Yes

SEDCAD+ RIPRAP CHANNEL DESIGN
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CHANNEL S2 PM-1
INPUT VALUES:
Shape TRAPEZOIDAL
Discharge 119.00 cfs
Slope 1.00 ~
Sideslopes (L and R) 3.00:1 3.00:1
Bottom Width 10.00 feet
Freeboard .3 ft
RESULTS:
Mild Slope Design
Depth 1.71 ft
with Freeboard 2.01 ft
Top Width 20.29 ft
with Freeboard 22.09 ft
Velocity 4.58 fps
Cross Sectional Area 25.97 sq ft
Hydraulic Radius 1.25 ft
Manning's n 0.038
• Froude Number 0.71
Dmax 1.500 ft (18.00 in)
D50 0.750 ft ( 9.00 in)
D10 0.250 ft ( 3.00 in)
•
7-12-41 Revised 05/08/98