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PERMFILE66875
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PERMFILE66875
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Entry Properties
Last modified
8/24/2016 11:12:36 PM
Creation date
11/20/2007 9:35:16 PM
Metadata
Fields
Template:
DRMS Permit Index
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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EAST MINE DIVERSION - NEST LIMB <br />.Ditch Sizi~jcn <br />1 <br />2 <br />• <br />3 <br />A = 16.0 cfs ('-; of 32 cfs) <br />Gross section - shot June 71, 1981 <br />A = Y2 (tan Q(+ tan) <br />2 <br />X1= Y tan Q~ <br />X2= Y tan <br />A = _- 16.Oft3/S = 4.Oft2 <br />V 4.Oft/S <br /> <br />a = 68,20° <br />= 74.05° <br />Y = 2.0' <br />X1= 5. <br />X2= 7' <br />N = 1.5 (A)2/3 (S)z =1 .5 (4.0 ft2)2/3 (0.094)' <br />V (P) 4.Oft~(7,35ft ) <br />N = 0.08 <br />A roughness of 0.08 could be accomplished by lining with vegetation of fist <br />sized gravel which would be nonerosive at velocity of 4.Oft/S. <br />4. Freeboard <br />5' 7' <br />• 2 4 2.0' I <br />~1.i6' <br />2.0' - 1.16' = 0,84' <br />
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