2009-06-19_PERMIT FILE - C1996083A ‎(8)‎

• Permit No: C1996083A
• IBM Index Class Name: Permit File
• Doc Date: 6/19/2009
• 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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•
Structure Detail:
Structure #18 (Riprap Chann%?
F14
Material: Riprap
Left Right
Bottom Freeboard Freeboard Freeboard
Sideslope Sideslope Slope (%)
Width (ft)
Mult. x
Ratio Ratio Depth (ft) % of Depth
(yxp)
3.00 1.5:1 1.5:1 50.0 1.00
w/o Freeboard w/ Freeboard
Design Discharge: 34.94 cfs
Depth: 0.78 ft 1.78 ft
Top Width: 5.35 ft 8.35 ft
Velocity: 10.70 fps
X-Section Area: 3.27 sq ft
Hydraulic Radius: 0.561 ft
Froude Number: 2.41
Manning's n: 0.0670
Dmin: -S-e9 in-
D50: 4,000 *- 18 in. required`
Dmax: 4a-ee-iR
PADER Method - Steep Slope Design
C
U
TR-61
A ?PRovsp
61 ?4/a9
App-B25
Printed 06-11-2009
06/09
Trapezoidal Riprap Channel Inputs:
Riprap Channel Results:
* 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
35 cfs while using the Simons/OSM steep slope method. The D50 formula calculates a D50
value of 19", but for simplicity, 18" is specified.
Filename: Pond F-100Yr.sc4