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� r. <br />r <br />, , r <br />1 <br />2 <br />3 <br />4 <br />5 <br />6• <br />7 <br />8 <br />��� <br />10 <br />il <br />12 <br />13 <br />14 <br />15 <br />16 <br />17 <br />18 <br />19 <br />20 <br />121 <br />22 <br />23 <br />24 <br />e <br />(c) Retention/d�:tention facIlities must be provIded In order <br />to maIntaIn, surface water dtschargq rota at or below the <br />existing deslg� storm peak dI'tcliarge as specifIed In the <br />Comprehmsive pralnage Plan; and <br />(d) Where open r.hanoel construction Is used fo handle dralnage <br />wlthln the subJect�property, a mInimum'of fIftaen .(15) feet <br />will be provIded tKtween any structures and the top of the bank <br />of the defined ch�innel. <br />(1) In open �:hannel work the water surface elevatIon wIll <br />be indlcated on the plan and profAe drawings. The conflguration � <br />' of the finIshe:d gades constItuting the banks of the open <br />channel will �ilso be shown on the drawIngs. <br />(2) proposeci cross sectlon of the channel will be shown , • I <br />• wIth stable si;de slopes as approved by the City Engineer. � <br />(3) The water, surface eleVatton of the maximum floa <br />for,the daign storm wIll be Indicated on the cross sectlon. <br />(2) To the extent possible as determined by the City Engineer� ' <br />approved measures for controlllng runoff during constnictIon should comply <br />wIth the above provlslons. . . , <br />'(3) Adequate measures as oudined and/or refecred to in ,he Procedure <br />Manual shall be caken for controlUng erosIon during and after consiruction. <br />(4) VarIances from the requirements oi Sectton 3(1) may be permltted <br />only after evaluatlon•by the City Engineer of data supplied by the developer � <br />and a determination usIng the comprehenslve dralnage plans, and by employIng <br />the following crIteria: � • . <br />(a) SufiicIent capacity under destgn cond(tions of • <br />downstream facilitIes; . - <br />25 � <br />(b) Maintenance oi the Integrlty of the receivIng waterr <br />26 (c) Possibility of adverse effects of retentIon/deten8on; <br />27 . (d) Utiltty of regional retentIoP/detentIon facillties;. <br />28 ' 7 ' <br />! (e) Capabil[ty of maintenance of the system; and <br />29 (f) Structural Integr[ty of �abutting foundations and <br />i <br />a� ' � structures. . . . <br />32 IIRequests for varlances shall be filed in writing wtth she City Eng(necr <br />and shall adequately detail the basls Sor granting an exemption. <br />_�_ . <br />� . r • <br />• � . '. ' . � � . <br />•� ` . <br />� . � . ' , <br />c <br />, �i. . <br />' . , " , <br />� <br />� <br />