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2008-01-28_PERMIT FILE - C1992080A
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2008-01-28_PERMIT FILE - C1992080A
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Last modified
8/24/2016 3:21:41 PM
Creation date
6/24/2008 11:07:42 AM
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Template:
DRMS Permit Index
Permit No
C1992080A
IBM Index Class Name
Permit File
Doc Date
1/28/2008
Section_Exhibit Name
APPENDIX 5-2 SEDIMENT POND CONTROL DESIGN
Media Type
D
Archive
Yes
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• Calculation Sheet L of 5 <br />PCI Sediment pond f/I <br />As Built <br />VOLUME OF SEDIMENT POND 1/1 <br />tL = lag time, from Sediment Pond /I1 Calculation Sheets for Sediment <br />Pand iil (Appendix 5-2) <br />.387 hr. <br />D = incremental rainfall duration = .4 tL <br />_ .155 hr. <br />Tpi = time to peak inflow = tL + D/2 <br />_ .464 hr. <br />V = volume of runoff/watershed for 10 year-24 hour event <br />_ .89" <br />• A = area of watershed <br />_ .482 sq. mi. <br />Qpi = peak inflow = (484A)/Tpi <br />= 502.8 cfs <br />Convert Qpi to inches/hour <br />I <br />QPi = (502.8 ft3/sec.) (3600 secs/hr) (1 ac/43,560 ft2) (12 in/f t) <br />308.3 ac. <br />= 1.617 in/hr. <br />• <br />
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