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r\shb� rn "I�o��nhomcs <br />6. HYDRAULIC ANALYSIS (cont.) <br />Stagcd Stm•agc Tablc rcprescnts Uic 100%� condition of rcquircd vault sizing for thc <br />Cily of 13vcrett critcria. Actual Storagc Capacity in a 36.0' x 15.33'x 2.5' structurc <br />will providc thc additional 36% in volume �o �ccommod�ric Uic DOC rcyuiremcnts. <br />'I�hc cxtra live storage lvailnblc is provided as thc pipe diameter is incrcased. <br />13G% Pund Storagc (SCC/ DOL, undev. CN =81) <br />AvailaUlc ��olumcs (at livc pond dcpth = 2.5) <br />A4anholc volumc (48-inch di.unctcr x G.5 I'ccl) <br />fot.il �oluntc <br />1.371 cC< 1,421 c1'= OKi�}, <br />D. Rcstriction Dcvicc llcsign <br />= 1.371 cl' <br />= 1,341 cf <br />= 80 d� <br />1.421 cf <br />Tlic convcntional conlrol structurc contains a 0.750-inch (3/�4") ori(icc at <br />rclati��c elcvation hvo icet bclow the outicl clevation, "I�hc resull oCthis orifice design <br />���as to relcasc 0.02 cis, �vhich is cqual to 50% of thc 2-ycar undcvcloped runoCl'. '1'hc <br />outict structurc thcn matches ihc 10-)'r. undc��clopcd pcak cvcnt to rcicasc at 0.116 cfs. <br />"llre rcicase slructurc indudes a second orifice, of 2.50 inches (2 — 1/2"). Thc ouUct <br />stnicture then matches thc 100-yr. undevclopcd pcak cvcnt to rcicase at 0.14 cfs. 'I hc <br />rcicasc structurc includcs a third orificc, of L60 inches (1-5/8"). <br />In the sitc ]00 ycar slorm, the dcvciopcd pcak Ilow ol'0.248 cfs is rcduced lo <br />thc undcvclopcd pc:�k llo�v of QalOp = 0.138 cfs, bascd upon thc historical condition <br />dcscribcd. 'Chc results 1or thc dcsign Combination Struclin•c ('friplc-Oriticc) arc gi� cn <br />in thc LCVEL POOL TAI3LF. SUMMARY in thc altachmcnl pagc�. 'I'his is thc <br />computcr's match for lhc perli�rmancc critcria. <br />Lmcrgcncy O��cr(lo���: <br />l�hc standard 12"-RiscdStandpipc ��ill bc pro� idcd in thc nc��� restrictor as an <br />cmcrgency relcase poinL 'I'hc Riscr Hlevation ���ill bc a distance of d.� icet (I�1 = <br />�31.60) abovc thc im�crt of ihc Pirst orilice restriclor. <br />\��I�;I Oa-�-11-R 10 <br />