2015-04-02_PERMIT FILE - C1996083

• Permit No: C1996083A
• IBM Index Class Name: Permit File
• Doc Date: 4/2/2015
• 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

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Structure Detail.,
D1 TCH-74
Triangular Erodible Channel Inputs:
Material: Shales and hardpans
Left Right I Freeboard Freeboard Freeboard
Limiting
Sideslope Sideslope Slope ( °10) Manning's n
Velocity (fps)
Ratio Ratio Depth (ft) % of Depth Mult. x (VxD)
2.75 ft 3.05 ft
1.5:1 1.SA 0.1 0.0250 0.30
6.0
Erodible Channel Results:
Filename: Pond J_10 year.sc4
1
Printed 12 -22 -2014
TR -91 Volume XI, App. B -19 12/14
w/o Freeboard w/ Freeboard
Design Discharge:
23.29 cfs
Depth:
2.75 ft 3.05 ft
Top Width:
8.24 ft 9.14 ft
Velocity:
2.06 fps
X- Section Area:
11.31 sq ft
Hydraulic Radius:
1.142 ft
Froude Number:
0.31
Filename: Pond J_10 year.sc4
1
Printed 12 -22 -2014
TR -91 Volume XI, App. B -19 12/14