PERMFILE58585

• Permit No: C1996083A
• IBM Index Class Name: Permit File
• Doc Date: 9/26/2005
• Doc Name: Appendix A to Appendix C -Report Dated 11/10/03
• Section_Exhibit Name: Coal Mine Waste Disposal Area No. 2
• Media Type: D
• Archive: Yes

SEDCAD 4 for Windows
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19
• Structure #6 (Riprap Channel
D-F6
Trapezoidal Riprap Channel Inputs:
Material: Riprap
Bottom Left Right Freetx>ard Freetx>ard Freeboard
Width (ft)} Sideslope Sideslope Slope (%)
R
ti
R
ti ~ o - Mult. x
pth (ft) /o of Depth
a
a
o
o (VxD)
3.00 1.5:1 1.5:1 50.0 1.00
Riprap Channel Results:
PADER Method -Steep Slope Design
w/o Freeboard w( Freeboard
Design Discharge: 32.35 cfs
Depth: 0.76 ft 1.76 ft
Top Width: 5.29 R 8.29 ft
Velocity: 10.24 fps
X-Section Area: 3.16 sq ft
Hydraulic Radius: 0.549
Froude Number: 2.34
Manning's n: 0.0690
Dmin: 5.00 in
D60: 9.00 in
Dmax: 12.00 in
Structure #i (Erodible Chann%j
D-FI
Triangular Erodible Channel Inputs:
Material: Shales and hardpans
Left Right Freeboard Freeboard Freeboard Limiting
Sideslope Sideslope Slope (%) Manning's n Mult
x Velocity
Ratio Ratio .
Depth (ft) % of Depth (VxD) (f~)
1.5:1 1.5:1 2.0 0.0250 0.30 6.0
Erodible Channel Results:
I
w/o freeboard w/ Freeboard
Design Discharge: 1.52 6s
Depth: 0.56 ft 0.86 ft
Top Wid[h: 1.69 ft 2.59 ft
Filename: GobPileDitches.sc4
Printed 10-29-20113
APP-B - 27 - 11/03