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I (icnlrchnicul Enginccri�ig R hor( 6 ( Jm�c?, 2009 <br /> Cnnimunilr Heallh Cenler, Evarcu. II A Projecf#?009-1�a <br /> I <br /> With the pavemcnt subgradc prcpared as dcscribed above, �ve recommend that the general <br /> I parking arca bc p�ved with Ilc�iblc pavcmenl surface. The following pa��ement sections <br /> are recommcnded: <br /> i For heav}' truck traffic areas: 3 inches of asphalt concrete (AC) over 6 inches of <br /> crushcd rock basc (CRI3): and <br /> � For general parking areus: 2 inches of AC over 4 inchcs oF CRB. <br /> The asphalt paving materials uscd should conlorm to the \Vashington 5t�te Department of <br /> i Transportation (WSDOT) spccifications for Class I3 asphalt concrcte and CRB surfacing. <br /> � Long-terni pavemcnt performancc �vill depcnd on sur('acc drainage. A poorly-drained <br /> I pavcmcnt scction will bc subjcct to prematurc failurc as a msult o( surface �vater <br /> infiltrating into Ihc subgradc soils and rcducing thcir supporting capability. <br /> For optimum pa��ement per(ormanee, surface druinage gradients of no Iess than hvo <br /> ! perccnt arc rcconnncndcd. Also, some degrec of longitudinal and transvcrse cracking of <br /> thc pavemcnl surlacc should bc cxpcctcd o��cr timc. Rcgular maintcnancc should bc <br /> ( planned to seal cracks when they occur. <br /> 5.0 ADUITIONAL SEKVICES <br /> IRGf is availablc to provide tiirthcr gcotcchnical consuitation as thc r:oj�ct dcsign <br /> dc��elops. We should revicw thc �inal dcsign and specilicalions in order to veril'y that <br /> I carthwork and linmdatiun rccommendations have bcen properly intcrpreted and <br /> incorporated into projcct dcsign anJ constnictian. <br /> I We �re also available to providc gcotecimical enginecring and monitoring scrviccs during <br /> construclion. "fhe intcgrily of lhc faundation dcpcnds on proper silc preparation and <br /> construction procedurcs. In addition, cngir.ccring decisions may ha��c to be made in thc <br /> ficld in thc evenl that variations in subsurlace conditions bccome apparenL Constn�ction <br /> monitoring serviccs are not part oPthis scope oC�vork. Itthese scrvices are desircd, pleasc <br /> let us know and wc will prcrarc a cost proposal. <br /> �I <br /> 6.0 LIMITATIONS <br /> IThis report is lhe property of The Riley Group, Inc., Comnwnity Ffealth Center of <br /> Snohomish County, and tluir designated agents and ���as prcpared in accordance with <br /> generally acceptcd geotechnical cnginecring practices. Tliis report is intcnded for specitic <br /> applicatiou to the Proposed Communiq� liealth Center at dic south�eest carner of ld°i <br /> Street and Broadway Avenue in L�•crctt, 1Vashington. This report was prepared for thc <br /> Iexclusive use of Community Health Centcr of Snohomish County and its authorizcd <br /> ' rcpresenlalivcs. It shoidd be madc availablc to prospecti��e contractors 1'or information or <br /> I <br /> � The Riley Group, Inc. � <br /> a� <br />