2012-11-21_PERMIT FILE - C1982056A ‎(2)‎

• Permit No: C1982056A
• IBM Index Class Name: Permit File
• Doc Date: 11/21/2012
• Doc Name: COAL REFUSE DISPOSAL AREA EXPANSION
• Section_Exhibit Name: Exhibit 08EE Coal Refuse Disposal Area Expansion Drainage Designs
• Media Type: D
• Archive: Yes

SEDCAD 4.0
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Refuse Disposal Area - Ditch RDA -4, 5.0% Slope
(Design for 100 -year, 24 -hour event)
Material: Riprap
Trapezoidal Channel
Bottom Left Right
. Freeboard Freeboard Freeboard
o
Sideslope Sideslope Slope ( /o)
Width (ft)
Mult. x
Depth (ft) % of Depth
Ratio Ratio
(VxD)
5.00 3.0:1 3.0:1 5.0
0.30
PADER Method - Steep Slope Design
•
0
SEDCAD Utility Run
Printed 09 -28 -2009
w/o Freeboard " w/ Freeboard
Design Discharge:
83.00 cfs
Depth:
1.35 ft 1.65 ft
Top Width:
13.12 ft 14.92 ft
Velocity:
6.77 fps
X- Section Area:
12.26 sq ft
Hydraulic Radius:
0.904 ft
Froude Number:
1.23
Manning's n:
0.0460
Dmin:
3.00 in
D50:
6.00 in
Dmax:
9.00 in
SEDCAD Utility Run
Printed 09 -28 -2009