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
(:muninhf 1°OA_7M17 1 Q,h—h
Refuse Disposal Area - Ditch RDA-4, 2.7% Slope
(Design for 100 - r 24 -hr event
Material: Riprap
Trapezoidal Channel
Left Right
Freeboard Freeboard Freeboard
Bottom Sideslo a Sideslo a Slope )
83.00 ds
Width (ft) Ratio Ratio {
Depth (ft) % of Depth Mtn)
5.00 3.0:1 3.0:1 2.7
0.30
PADER Method - Steep Slope Design
•
SEDCAD Utility Run Printed 09 -28 -2009
w/o Freeboard w/ Freeboard
Design Discharge:
83.00 ds
Depth:
1.40 ft 1.70 ft
Top Width:
13.38 ft 15.18 ft
Velocity:
6.47 fps
X- Section Area:
12.83 sq ft
Hydraulic Radius:
0.928 ft
Froude Number:
1.16
Manning's n:
0.0360
Dmin:
2.00 in
DSO:
3.00 in
Dmax:
4.50 in
SEDCAD Utility Run Printed 09 -28 -2009