PERMFILE66875

• Permit No: C1981016
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: Sedimentation Control & Diversion Structure Calculations
• Section_Exhibit Name: APPENDIX XXI to Section XXI.8
• Media Type: D
• Archive: No

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• Assume Y until P = 5.898 ft
If Y = 0.858' _> X = 4.965' _> P = 5.897'
tlESTERN MINE DIVERSION - P1IDDLE LIl18
Culvert Sizing
1. Q = 36.9 cfs
2. Q=AV
z
z
30" = 2.5' "r> 4.909 ft
V = 4 = 36.9 = 7.5 ft/s
A 4.909
Reasonably the culvert should handle it.
Flow Calculations contained in Appendices XXI.1-8 used the U.S. Department of
Agriculture Procedures For Determining Peak Flows in Colorado (Soil Conservation
Service, March 1980).
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