2016-11-07_PERMIT FILE - C1996083A

• Permit No: C1996083A
• IBM Index Class Name: Permit File
• Doc Date: 11/7/2016
• Doc Name: Appendix A through Appendix C
• Section_Exhibit Name: Volume IX Coal Mine Waste Disposal Area No. 2
• Media Type: D
• Archive: Yes

Outlet of Culvert G-2 (T-F6)
Manning's Equation
Flow In a Trapezoidal "Smart Ditch" Channel
Depth D 0.2 Feet
Width W 1.12 Feet
Slope S 0.25 Express as Decimal
Mannings "N" N 0.022 Express as Decimal
Side Slope X 1.3 Slope = X:1
AREA=(W*D)+(X*D"2)= 0.20 FEET "2
WETTED PERIMETER=(W)+2*[((X*D)"2+D"2)"0.5] 1.61 FEET
R=AREA/WETTED PERIMETER 0.12
V=(1.49/N)*(R".667)*(S".5)= 8.35 FT/SEC
Q=AXV= 1.65 CFS
Q REQUIRED - Peak Discharge 0.78 CFS
* Please see Smart Ditch product specifications in Volume 111,
Exhibit 8, pages 8-29ii & 29iii
MR -183 Volume XI, App. B-108 09/15