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-6 UPPER
INPUT VALUES:
Shape TRAPEZOIDAL
Discharge 23.00 cfs
Slope 6.00 ~
Sideslopes (L and R) 3.00:1 3.00:1
Bottom Width 2.00 feet
Freeboard .3 ft
RESULTS:
Steep Slope Design - PADER Method
Depth 0.84 ft
with Freeboard 1.14 ft
Top Width 7.04 ft
with Freeboard 8.84 ft
Velocity 6.05 fps
Cross Sectional Area 3.80 sq ft
Hydraulic Radius 0.52 ft
Manning's n 0.039
Froude Number 1.45
• Dmax 0.313 ft ( 3.75 in)
D50 0.250 ft ( 3.00 in)
D10 0.083 ft ( 1.00 in)

7-12-71 Revised 05/08/98