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PERMFILE133929
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PERMFILE133929
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Entry Properties
Last modified
8/24/2016 10:34:37 PM
Creation date
11/26/2007 1:45:36 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981008A
IBM Index Class Name
Permit File
Doc Date
3/25/2003
Doc Name
Collection/Diversion Ditches and Culverts Design Parameters
Section_Exhibit Name
NH2 Section 2.05.3(3) Attachment 2.05.3(3)-1
Media Type
D
Archive
Yes
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• CULVERT A-2 BASIN 5 <br />Time of Concentration (SCS Method) <br />Curve Number: 87 <br />Length of Flow (ft): 811.74 <br />Average Land Slope Q: 10.4 <br />Time of Concentration (hrs): 0.11 <br />08/07/1999 <br />Graphical Peak Discharge <br />08/07/1999 <br />Project: AMENDMENT By: GL Date: 08/07/99 <br />Location: CULVERT A-2 Checked: Date: <br />Developed <br />1. Data: <br />Drainage area :....................A = 7.4000 Acres <br />Runoff Curve Number :.............CN = 87 <br />Time of Concentration:...........Tc = 0.11 <br />• <br /> <br />Pond and swamp are <br />2. Frequency ............... <br />3. Rainfall,P(24-hour).. <br />4. Initial abstraction, la <br />5. Compute la/P........... <br />as spread throughout watershed =percent of A <br />0.3700 Acres <br />........yr = 10 <br />...........in = 2.00 <br />........... = 0.2989 <br />............ = 0.1494 <br />6. Unit peak discharge, qu......csm/in = 958.44 <br />7. Runoff,Q .........................in = 0.9056 <br />8. Pond & swap adjustment factor,...Fp = 0.80 <br />9. Peak Discharge,gp ...............cfs = 8.0291 <br />(REVISED 12/00) <br />Attachment 2.05.3(3)-1- 25 <br />
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