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

SEDCAD 4 for Windows
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Structure Detail;
Structure #31 6% rap Channel)
DITCH JII
Trapezoidal Riprap Channel Inputs:
Material: Riprap
-Bottom Left Right
Freeboard Freeboard Freeboard
5ideslope Sideslope Slope ( %)
Width (ft) Ratio Ratio
-
Depth (ft) - % of Depth Mult. x (VxD)
3.00 1.5:1 1.5:1 8.0
1.00
Riprap Channel Results:
Simons /OSM Method - Steep Slope Design
Filename: Pond J_100 year.sc4
TR -91
w/o Freeboard w/ Freeboard
Design Discharge: 10.97 cfs
- - Depth: 0.29 ft 1.29 ft
TOD Width: 3.87 ft 6.87 ft
Velocity*:
X- Section Area:
Hydraulic Radius:
Froude Number *:
Manning's n *:
-- Dmin: - — - - -
D50:
Dmax:
0.99 sq ft
0.246 ft
4.00 In
12.00 in
15.00 in
Velocity and Manning's n calculations may not apply for this method.
Volume XI, App. B -57
1
Printed 09 -02 -2014
09/14