2011-10-31_PERMIT FILE - C1981025A ‎(2)‎

• Permit No: C1981025A
• IBM Index Class Name: Permit File
• Doc Date: 10/31/2011
• Doc Name: Final Engineering Calculations
• Section_Exhibit Name: 4.0 Appendix 4-B
• Media Type: D
• Archive: Yes

• Unit Train Loadout - Haul Road Culverts
Drawing D-2-3 Loadout Area - Haul Road Drainage presents the
location of the existing haul road culverts. The information
contained in the following Appendix 4-B presents a calculation of
the required culverts for the unit train Loadout haul road. The
calculations prepared by J. Don Newton, P.E., dated October 29,
1981, segregate the drainage area above the haul road into six
segments. The capacity of the culverts within the six drainage
areas are then compared to the run-off calculations to determine if
there is adequate culvert capacity to pass the design flow.
C~
•
The following table presents a comparison of the existing culverts
with the run-off calculations prepared in 1981:
Drainage
Area No.
Acres Max Run-off
CFS
Culverts Culvert
Capacity
I 61 6.2 24" 12.00
18" 5.75
Total 17.75
II 41 4.1 18" 5.75
III 24 2.4 36" 32.50
IV 406 40.6 48" 65.00
24" 12.00
Total 77.00
V 112 11.2 24" 12.00
24" 12.00
18" 5.75
Total 29.75
VI 281 92.6
HWID=1.5 30" 32.50
HW/D=1.5 24" 18.50
HW/D=1.5 42" 70.00
Total 121.0
It can be seen from the above table there is adequate culvert
capacity to pass the design flow from each drainage area. All of
the culvert capacities are determined with the assumption that no
head is required except for drainage area VI.
4-B:3 November 1994