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� a <br /> � � �v��d� � <br /> D � C �� <br /> Apri113, 2005 DAVID EVANS <br /> nNoASSOCIATES �N�. APR Z 42005 <br /> .. ............................................ <br /> Kirk Brooks, Pcrmit Scrviccs Managcr CITY AF EVEfiETT <br /> Enginronnq/PuMic .^.•rv�c.s <br /> City of Gverett Public �1'orks <br /> 3200 Ccdar Strc�t <br /> B��crctt, WA 98201 <br /> SUI3JECt: SATELLITF, R�UL/13ARGE TRANSFF:R FACILITY- HYDRAULIC ANALYSIS <br /> Dcar Mr. Brooks: <br /> Attachcd arc thc hydraulic analysis calculations dcvclopcd for thc Satdlitc Rail/I3argc '1'ransfer Pacility to be <br /> locatcd���ilhin thc Ciry of L'vcrctt. <br /> • 'I'hc hydraulic convcyancc sysicm was dcvclopcd using thc Rational Mcthod with cocfticients rcicvant to <br /> thc projcct's location. This annlysi,was compilcd using an MS C•�cc! spreadsheci. <br /> • Sub-F3asin nmoff analysis was dcvclopcd using W\YI1M vcrsion Pcbruary 200d. <br /> ,"_� <br /> i ' ! • S�ing of the SMI (Storniwater Management Inc.) Stamifilters situated throughout the site were si-r.cd by <br /> ! Joe Reidy of SMI 1-800-548-4CG7 using sub-basin analysis provided by DEA. 'l�his system is rcquired <br /> � for��atcr quality lrcatment of runoff gencralcd b�impervious pavemcnt. <br /> i 1, <br /> % • Sizi4�g of Contech's Vortcch 1000 vault si�uatcd within Ihc proposcd parking lot was sizcd by Scott <br /> ' Gohtcu of Contcch 1-R77-907-SG7G using sub-basin analysis providcd by DGA. This sys�cm is rcquircd <br /> f'o pro-trcatmcnt of nmoff, scdiment removal, prior to discharging to thc Stonnfiltcr vault. <br /> �`• 'iring of the 7_urn Trcnch Dtains situalcd Ihroughout the pier were sized by Scott Chandler I-253-581- <br /> , ,,\ �(9S using sub-basin analysis providcd by DLA. "fhcsc trcnch drains arc ncccssaq� to convcy rwioff to <br /> Stonnfil�ers situated thraughout �he pier thus a��uiding direct discharge of imtreated watcrs to Possession <br /> , Sound. <br /> � <br /> �,1CHqIy <br /> � If you havc any qucstions rcgarding this cotrespondcncc, pleasc contact us. M�`��. K'AS/��1 �L� <br /> h� � <br /> Sinccrcly. ��hr 1 � �x <br /> `, — <br /> _`7 <br /> i, DAVID�VA�S AND ASSOCIATES,-tNC. <br /> � • ij� ��s- l��' ,�ss ,; � <br /> — �o � <br /> ,;_, `,�. <br /> � T �"�;C��c� - <br /> 'I'homas Wcllcr. P.L'. <br /> Scnior Lngincer EXPIFES 03 15/O <br /> �-- --�-- - <br /> Attachnun�s/Bnclosures Ralimial Method Conccy:mce Anal��sis. Sub-Basin Runoff Analysis <br /> nianpioaro��niaaua:.i�--rs�n.,i„c <br /> . <br /> \ ` <br /> \ � <br /> Io�UAYcsiMarmel9ew rive $une�00 I_errrllAV;ichmllnnSN�01 Tclrphnn��� 4=51i9.4077 F;usinidr�. 4Z> ?i9.3?i0 <br />