2014-09-02_PERMIT FILE - C1996083A ‎(2)‎

• Permit No: C1996083A
• IBM Index Class Name: Permit File
• Doc Date: 9/2/2014
• 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
I Q,k ... eK
I
Structure Details
Structure #31 (Riprap Channel
DITCH J11
Trapezoidal Riprap Channel Inputs:
Material: Riprap
Bottom Left Right
Freeboard Freeboard Freeboard
Width (ft) Sideslope Sideslope Slope lope
0.29 ft 1.29 ft
Ratio Ratio
Depth (ft) % of Depth Mult. x (VxD)
3.00 1.5:1 1.5:1 8.01
1.00
Riprap Channel Results:
Simons/CISM Method - Steep Slope Design
w/o Freeboard w/ Freeboard
Design Discharge:
10.97 cfs
Depth:
0.29 ft 1.29 ft
Top Width:
3.87 ft 6.87 ft
Velocity *:
X-Section Area:
0.99 sq ft
Hydraulic Radius:
0.246 ft
Froude Number*:
Manning's n*:
Dmin:
4.00 in
D50:
12.00 in
Dmax:
15.00 in
Velocity and Manning's n calculations may not apply for this method.
Filename: Pond J_100 Year Event-1 1051 3.sc4 Printed 11-24-2013
TR-84 Volume X1, App. B-53 02/14