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The volume required by the SW'-�'1M model was originally 39,204 CF. Adjusting the
<br /> volume based on !he new tributary areas and CN-values yields the following required
<br /> vol; .�e:
<br /> 39,204 cf V cf V = 37,855 CF
<br /> 5.23(98) 5.05(98)
<br /> The volume provided in tt�e wetland ponds is 47,585 CF (pond elevations 600.10 and
<br /> 608.35) which is greater than the adjusted required volume uf 37,855 CF.
<br /> Level��R011tine Table
<br /> Description Intlo�v Storagc Di'cDlirg P. �6� Vo�Fi�c �CFS`� PFIoDs` CFS d
<br /> CFS �� 0.17
<br /> 2-Yr-South Ccll I.G3 DETt D153 607.85 19114 O.11 0.16
<br /> 0 IG DET2 DIS6 �99 GI 7�73 >.,... < ,« >, . <.....,
<br /> 2-Yr-North Ccll , . .
<br /> ..� ..,... .
<br /> ,.� ....
<br /> .. <., �
<br /> ., , , ,,.�..<., G08 OS 23918 0.24
<br /> 5-Yr-South Ccll 2.13 DETI DIS3 9�J$2 O.IG 033
<br /> 0.33 DET2 DISG �9981 ,.. ».r. . ..,.�.... .. .
<br /> _Yr-NonhCcil ,,,� `•
<br /> ...,.r„. ,,._
<br /> ...,:,,.. 0 2A
<br /> a ".' . , DIS3 G08 18 279�1
<br /> 10•Yr-South Ccll 2.54 DET I 0.49
<br /> 0.49 DET2 DISG �99.94 11G3G 0 20.. _<. . .. .. ... ,., ,..,.
<br /> 10-Yr-North Cell . :.:.
<br /> »,:
<br /> ,.,.:., .,,:.;„..
<br /> ....�.
<br /> ., <,,, DIS3 GOS35 334R0 0 3
<br /> 25-Yc-South Ccll 3 OR DET 1 0.76
<br /> 0 7G DET2 D1SG 600 OR 13R50 0 25^ ,
<br /> 25-Yr-North Cell .,•. ..>.. •
<br /> ; ..�:.:
<br /> 3.SA DET1 D1S3 G08.52 35592 Q70
<br /> 100-Yr-South Ccll,< p.33 1.20
<br /> ]00-Yr-NorthCcll L20 DET2 DISG G0031 ISOi7
<br /> Note: P. Stage= Peak Stage in Pond
<br /> P. Time=Time to reach Peak Stage
<br /> As noted in the table above, per tlie SBUH calculations, the developed 100-year flows
<br /> have been detained and released at the pre-developed 5-year flow rate. However, per the
<br /> SWIvIlvS calculations provided by the Ciry of Everett, the pre-developed 5-year flow rate
<br /> was estimated �� er the1SIIUH ealcul�ion)is a{Pro`°na�e�Y o 95 cfs.TThe C iy e Everett
<br /> year discharge (p
<br /> has agreed to accept this minor discrepancy between models.
<br /> STOIiM DRAINAGE REPOIYI' fOlt IN'TRAWEST-SEA\VAY - PA(%E 13
<br />
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