Laserfiche WebLink
� Mr. Bnxe Vanderwall <br /> . . Ap�i! 16, 2008 • <br /> The paving materials used should conform to tl�e Washington Sbte Departme�t of <br /> ^; Transportatlon(WSDO� spedflwbons for Class B asphalt concrete, ATB, and CRB. <br /> Long-term pavement performance will depend on surFace drafnage. A poo�ly-drained <br /> `� payement sectlon will be subject to premature f�ilure as a result of surFace waber <br /> inftitratlng in�o the subgrede sofis and reducing thefi supporting capability. To improve <br /> pavement perfortnance, surface drainage gradfents of no less tt►an two percent are <br /> recommended. Also, some longitudinal and transverse cradcinq of the pavement <br /> � • surface should be expected over t3me. Regular maintenance shuuld be planned to seal <br /> cracks when they occur. <br /> AdDITIONAI SERVICES <br /> .� . <br /> ' Geotechnkal and testing laboratory services should be provided du�ing consd'uction in i <br /> order to observe compliance with the design wncepts, specifications, and <br /> recommendaUons. This will also allow for design changes if subsurFace condidons differ <br /> from tl�ose anticipated prior to the start of constructlon. <br /> The analyses and recommendatlons presented in this report are based upon data <br /> obtained from the horings drilied cn-site and on an inidal site development concept. <br /> During constructlon, variat9ons in soil and groundwater conditlons can acur, the nature <br /> and extent of which .may not becorr�e evident untll gradfng. If variatlons appear <br /> evident, ABPB Consultlng should be •requested to reevaluate tt�e rewmmendatlons in <br /> this report prior to proceeding with constructlon. <br /> We also recommend thet ABPB Consultfng be retained to provide geotechnfcal <br /> observatfon services during construction. This is to observe compliance with the design <br /> concepts, specifications and recommendallons. It will also allow expedfent design <br /> changes in the event subsurface conditlons are encountered that differ from those <br /> anticipated. All foundation excavations and over-excavation areas should be examfned <br /> to assess that footing trenches have been dug down to soils with adequate bea�ing <br /> capacity. It is requested that we be given two working days notice to provide any of the <br /> above services, A testing laboratory company should be retained to conduct density <br /> tPsts in compacted structural fill areas as construction progresses. <br /> Project No. 12 5' <br /> Page No 30/�� <br />