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Comparison of City of Everett Standard Detention <br />Vault to Corrugated Metal Pipe Vault <br />December 2, 1994 <br />File No. 24-92-009-007-0 l <br />Page 4 <br />For the proposed pipe detention vault, the variables aze as follow: <br />Qo =1.92 cfs = 2=.96 cfs (flow split in two d'uections in pipes) <br />A�: <br />r <br />x =r <br />�� , <br />Equations Follow: <br />Ac - Atotal — Asegment <br />2 2 <br />1U� ?68 2 <br />Ac�`� — 4 = 4 = 50.3ft <br />Asegment — Z IZ (� — Siri (�� <br />� = 2(90° — siri ' (y )) <br />r <br />r=yd=y(8)=4ft <br />d=8' <br />y=h-r=h—yd=7—'/Z(8)=7-4=3ft <br />