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
CHANNEL S2 PM-8 LOWER
INPUT VALUES:
Shape TRAPEZOIDAL
Discharge 96.00 cfs
Slope 2.00 ~
Sideslopes (L and R) 3.00:1 3.00:1
Bottom Width 10.00 feet
Freeboard .3 ft
RESULTS:
Steep Slope Design - Simons/OSM Method
Depth 0.74 ft
with Freeboard 1.04 ft
Top Width 14.45 ft
with Freeboard 16.25 ft
Velocity 10.58 fps
Cross Sectional Area 9.08 sq ft
Hydraulic Radius 0.62 ft
Manning's n 0.037
Froude Number 2.35

Dmax
0.938 ft (11.25 •
in)
D50 0.750 ft ( 9.00 in)
D10 0.250 ft ( 3.00 in)
•
7-12-98 Revised 05/08/98