2015-12-23_PERMIT FILE - C1996083A ‎(5)‎

• Permit No: C1996083A
• IBM Index Class Name: Permit File
• Doc Date: 12/23/2015
• 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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DITCH J7
OPERATIONS CONFIGURATION
Structure Detail:
Triangular Riprap Channel Inputs:
Material: Riprap
Left Right
Freeboard Freeboard Freeboard
Sideslope Sideslope Slope (%)
22.91 cfs
Ratio Ratio
Depth (ft) % of Depth Mult. x (VxD)
1.5:1 1.5:1 33.01 0.30
Riprap Channel Results:
PADER Method - Steep Slope Design
Filename. Pond J_1 M -Operations, revised.sc4
Printed 09-21-2015
TR -105 Volume XI, App. B-20 09/15
w/o Freeboard w/ Freeboard
Design Discharge:
22.91 cfs
Depth:
1.24 ft 1.54 ft
Top Width:
3.73 ft 4.63 ft
Velocity:
9.86 fps
X -Section Area:
2.32 sq ft
Hydraulic Radius:
0.518 ft
Froude Number:
2.20
Manning's n:
0.0560
Dmin:
5.00 in
D50:
9.00 in
Dmax:
12.00 in
Filename. Pond J_1 M -Operations, revised.sc4
Printed 09-21-2015
TR -105 Volume XI, App. B-20 09/15