2009-12-28_PERMIT FILE - C1996083A ‎(10)‎

• Permit No: C1996083A
• IBM Index Class Name: Permit File
• Doc Date: 12/28/2009
• Doc Name: Appendix A to Appendix C Report, 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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Material: Riprap
Left Right
Bottom
Freeboard Freeboard Freeboard
a Slope Sideslo a Sideslo e
Width (ft) p ( )
Design Discharge:
Ratio Rati
Depth (ft) % of Depth ��)
3.00 1.5:1 1.5:1 50.0
1.00
Riprap Channel Results:
PADER Method - Steep Slope Design
1
Structure Detail;
Structure #18 (RipraD Chann %�
F14
Trapezoidal Riprap Channel Inputs:
* Based on input from SedCad, the Formula D50 = ((V *S ^0.17)/7.5) ^2 (in Feet) was used to
determine the required D50 size, as SedCad can't seem to handle a slope of 50% and a flow of
34 cfs while using the Simons /OSM steep slope method. The D50 formula calculates a D50
value of 19 ", but for simplicity, 18" is specified.
•
App. B -25
i
i
i
Printed 10 -01 -2009
09/09,
Filename: Pond F- 100Yr.sc4
TR -64
/9 �P�oUGD Iz /z��a9
w/o Freeboard
w/ Freeboard
Design Discharge:
33.74 cfs
Depth:
0.77 ft
1.77 ft
Top Width:
5.32 ft
8.32 ft
Velocity:
10.48 fps
X- Section Area:
3.22 sq ft
Hydraulic Radius:
0.556 ft
Froude Number:
2.37
Manning's n:
0.0680
Dmin:
65'66111"
D50:
18" Required*
Dmax:
42:66't r
* Based on input from SedCad, the Formula D50 = ((V *S ^0.17)/7.5) ^2 (in Feet) was used to
determine the required D50 size, as SedCad can't seem to handle a slope of 50% and a flow of
34 cfs while using the Simons /OSM steep slope method. The D50 formula calculates a D50
value of 19 ", but for simplicity, 18" is specified.
•
App. B -25
i
i
i
Printed 10 -01 -2009
09/09,
Filename: Pond F- 100Yr.sc4
TR -64
/9 �P�oUGD Iz /z��a9