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 4 ABOVE T-26
INPUT VALUES:
Shape TRAPEZOIDAL
Discharge 17.40 cfs
Slope 11.20 $
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 0.66 ft
with Freeboard 0.96 ft
Top Width 5.98 ft
with Freeboard 7.78 ft
Velocity 6.58 fps
Cross Sectional Area 2.65 sq ft
Hydraulic Radius 0.43 ft
Manning's n 0.043
Froude Number 1.74
Dmax 0.625 ft ( 7.50 in)
• D50 0.500 ft ( 6.00 in)
D10 0.167 ft ( 2.00 in)

7-12-61 Revised 05/08/96