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

• 4!E ST MINE DIVERSION - h1IDDLE LIMB
Assume 470 ft of corrugated culvert
o.z o.z
1. D = (f (8)(L)(Q)z) _ (f (8)(470)(36.9}z )
nz g hf nz(32.2)(109)
D = (f * 147.795) °•z
2. e/D = 0.1/D
3. Re VL = (n(D/2)z) * D = (n6D/2 ) ,~ D
v v 0.930
Re 50.519
• D
4. Assume maximum f therefore maximum D
Assume f = 0.08 => D = 1.639 ft 20 inches
e/D = 0.061
Re = 30.823
real f = 0.08
A 30 inch culvert was installed as approved by the regulatory agencies
so it is flowing partially full so no inlet or outlet control.