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� Soiy omw Ca�ki•D�Wy�RRort tAlN� <br /> �pp1ow11UP^N 3 <br /> �� Supplemental Analysis 2 - Reviaed <br /> � F7uke Pood 'A' Fertormance <br /> rFluke Paad A Deaf=n Methodolo�y <br /> � 'ILis aealysia ia ievi�ed b�ted oa mxting cortunenta fmm the(:iry of Evetea oe <br /> ( Auguat 14, 1991. The Ciry of Eve�ett aneaaed dut the ori�intl Flulce compuntiooa <br /> 1 daoed 7/17/84 merle an ertoneous assumpdon that BaeinYs 2 Yr P�sdeveloped <br /> conaibution wns 2.64 cfs. They also euxd dut the approvtl of Flulce Poad'A'rvaa <br /> �, only for the perfomuna of Flulce runoff. Baaed on thu approval,the�llowabk <br /> ielease ate that ia pamiued from dro Flulce property during a 25 yeu developed <br /> rsW�m event ia the predeveloped 2 year peek runoff nte,4.7 de. <br /> � 7Le Ciry of Evereu�Iso fals thet Boeing prcdeveloped 2 yr�uc�oH iaw the Flulce <br /> Pond'A'ta almost uro(0)cfs. Our compuadons uaing the SWMM model indtaoea <br /> � thtt the predeveloped 2 yr runoff rue fmm the Baing site is 0.11 cft. Henoe t6e <br /> cument design criuria is that F7uke Pond'A'c�nnot tClease more thu�4.51 cb(the <br /> � previously approved 4.7 cfa plus 0.11 cfa)when dx combi�d F1uke end Baiag 2S <br /> year developed nmoff hydro�aph is muted through dro pond. <br /> iWe diangree with the di�ecud methadology becaux of the inte�ndon of de:ign <br /> paranxoer developed from different methadologies. The 4.7 cfa allowable rekme <br /> ( ate is based on Rafioe�l methods while the cument project ia requi�ed o�uae <br /> � 6ydroBephic methads (SWMM). 7Le b�aia for each method ia very diffaeat <br /> � 'Itits rsviaed aupplement pe�t'omia ttie cort�putuions as directed. 7Le methodolo�y <br /> will be to developed 25 yeu and 100 yeu hydrogrepha for botL the Fluloe ud <br /> �_ Haing drainage a�sas tributuy w Poad'A'and route the soomu through it 7Le <br /> existing weir atn�ctws will be cedesigned if neaasary in order to m�iaain a <br /> � maximum disc6arge rate of 4.81 cfs from Flulce Pond'A'. <br /> � D � � � D � C� D <br /> � UG 19 1991 <br /> A <br /> 1 _ .... ... ............. <br /> _............ <br /> CITY OF EVERETT <br /> r SqDDlement 2 Revi6ed-P�¢e 1 Bld¢. Permlt Counter <br /> y F�genious Syqema,fac.■PO Box 30168,SeaCla iVA 98103■(20�7/{-S2S2 <br /> ! <br />