2014-09-22_PERMIT FILE - C1996083A ‎(2)‎

• Permit No: C1996083A
• IBM Index Class Name: Permit File
• Doc Date: 9/22/2014
• Doc Name: Appendix B - Protection of Hydrologic Balance
• Section_Exhibit Name: Volume XI Coal Mine Waste Disposal Area No. 3
• Media Type: D
• Archive: Yes

SEDCAD 4 for Windows
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1
Structure Detail:
Structure #13 (Erodible Channel
DITCH-710
Trapezoidal Erodible Channel Inputs:
Material: Shales and hardpans
Bottom Left (tight
Freeboard Freeboard Freeboard
Limiting
Width (ft) Sideslope Sideslope Slope ( %) Manning's n
Depth.
Velocity (fps)
Ratio Ratio
Depth (ft) % of Depth Mult. x (VxD)
Velocity:
3.00 1.5:1 1.5:1 1.0 0.0250
1.00
6.0
Erodible Channel Results:
Filename: Pond J_100 Year Event-1 10513.sc4 Printed 11 -20 -2013
TR -84 Volume XI, App. B -52 02/14
w/o Freeboard w/ Freeboard
Design Discharge:
4.87 cfs
-
Depth.
0.44 ft 1.44 ft
Top Width:
4.33 ft 7.33 ft
Velocity:
2.98 fps
X- Section Area:
1.63 sq ft
Hydraulic Radius:
0.354 ft
Froude Number:
0.86
Filename: Pond J_100 Year Event-1 10513.sc4 Printed 11 -20 -2013
TR -84 Volume XI, App. B -52 02/14