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PERMFILE112710
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PERMFILE112710
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Entry Properties
Last modified
8/24/2016 10:09:00 PM
Creation date
11/24/2007 9:48:39 PM
Metadata
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Template:
DRMS Permit Index
Permit No
C1981029
IBM Index Class Name
Permit File
Doc Date
12/11/2001
Section_Exhibit Name
APPENDIX 2.05.3-5B RIPRAP & CULVERT VELOCITY CALCULATIONS
Media Type
D
Archive
No
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APPENDIX 2.05.3-58 (Continued) <br />• <br />• <br />• <br />R~rap - Culvert No. 4 <br />Da = 1.5 Q = .14 Yt = .2 <br />Yt = 2 = ,13 <br />D T3 <br />p ~ _ ~~ _ .08 <br />Riprap channel length for distance 3 Da or 4.5 feet D50 = 9~~ <br />Expansion Factor (1/2 tan 0) <br />Q = 14 ,05 <br />~3 ~T6 <br />R~rap - Culvert No. 9 <br />Da = 1 5 Q - 6.75 cfs Yt = .58 <br />Yt = 58 = ,39 <br />D T3 <br />pT3 = T~4 = 3.67 <br />Use Type L D50 = 9~~ <br />Expansion Factor (1/2 tan 0) <br />0 = 6.75 = 2.45 <br />p2.~ <br />1/2 tan 8 = 5.0 <br />Determine length of riprap <br />At=QP At=~~ =2.25 <br />L = (1/2 tan 8 ~ -1) <br />L = (5) (~45) - 1 <br />L = (5) (3.22) - 1 <br />L = 15 feet <br />Da = pipe diameter in feet <br />S =slope <br />Yt = tailwater depth in .feet <br />Q =peak discharge (cubic ft./second) <br />V =velocity <br />At = cross-sectional area (ft2) <br />L = riorap channel length (ft.) <br />- 235 - <br />(Rev. 5/86) <br />
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