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 #28 6K / "rap Channel
DITCH J -18
Triangular Riprap Channel Inputs:
Material: Riprap
Left Right
I Freeboard Freeboard Freeboard
Sldeslope Sideslope Slope (%)
- -
Ratio Ratio
Depth (ft) % of Depth Mult. x (VxD)
1.5:1 1.5:1 15.0
1.00
Riprap Channel Results:
Sirnons/OSM Method - Steep Slope Design
Velocity and Manning's n calculations may not apply for this method.
Filename: Pond J-10 year.sc4
Printed 09-02-2014
TR-91 Volume X1, App. B-27 09/14
w/o Freeboard w/ Freeboard
Design Discharge:
0.79 ds
Depth:
--
0.13 ft 1.13 ft
Top Width:
0.40 ft 3.40 ft
Velocity*:
X-Section Area:
0.03 sq ft
Hydraulic Radius:
0.056 ft
Froude Number*:
Manning's n*:
Dmin:
3.00 in
D50;
9.00 in
Dmax:
11.25 in
Velocity and Manning's n calculations may not apply for this method.
Filename: Pond J-10 year.sc4
Printed 09-02-2014
TR-91 Volume X1, App. B-27 09/14