1424 BROADWAY Geotech Report 2018-01-02 MF Import

IGcok•chnicnf Enginccring Rcpur� l ( J�aic 1. 1009 Crunnnuiiro Hcnl(G Cen�cr. Evcrc(4 (1:! Project k'009-1SJ I 1.0 PRO.IECT DESCRIPTION I "fhe projcct site is locatcd at the suuthwcst corncr of 14'" Stmet and Aroadway Avenu� in Lverctt. �Vashington. Thc site address includes 1402, 140G, and 1430 Broadway A��enue. The approximatc location of the site is shown on the Site Vicinity Map, Figure I. The sitc is currently occupicd by mcdical / health service buildings in the southem portion of thc site. The northcrn portion of the site is a landscaping area. � RGI undcrstands that thc clicnt is pl�nning to build a new commun'sty health ccntcr (approsimately 18.000 square feet) in the northem portion of the site. The existing buildings ��ill br demolishcd and become the futurc parking lot Our understandine cf 1;ie i project is based on thc Sitc Plen Option I3 prepared by Giflin I3oltc Jurgens Architects datcd May 21. 2009. At the timc of thc prcparation of this rcport, detailed site erading and Ibuilding plans were not a��ailable for our revie�v. [3ased on the conversation with clicnt, i RGI expccts lhat the proposed building will be two-slory structurc, supported on perimeter �valls witli a bcaring load of 2 to 3 kips per lincar foot, and a serics of columns with a maximum load up to 7� kips. RGI cxpccts that minar sitc grading �vill bc needed for thc development. I Thc reconuncndations in lhe following sections of this rcport are bascd upon our understanding of tlic abovc design fcatures. If actual t'eature� vary or changcs arc made, we should revic�v thcm in ordcr to modify our rccatnmcndations as rcquired. In addition. I RGI rcqucsts to revicw tinal dcsign dru�vings and specitic�tions to verify that oiv projcct understanding is corrcct and that our rccomme�.iations h;n�c becn properly interprctcd and I ii�corporated inlo projcct design and construction. 2.0 SCOPE OF�YORK On May 26, 2009, RGI drilled a tolal oP six test borings to a ma�imum depth ol'21.� t'eet bclo�v grotmd stvfacc (bgs). "I'cst burings wcrc drillcd with a truck-mount. hollow stem augcr drill rig. Tcst borings (I3-I through D-4) were drillcd �vithin the proposcd building I footprinl area. Test borings (13-� and D-G) were drillcd in the proposed parking and Jriveway arcas. Thc appro�imate test boring locations are shown on figure 2. I Using the inl'orm�tion obtained from our subsurface exploration, we performcd analyscs to devclop gcotechnical recommcndations for projcct design and construction on thc following: I � 5oil and ground�vater conditions i Foundation support : 3eismic considerations : Slab-on-grade support Ii Site preparation and grading � Utilities i SUuctural till recommendalions i Pavements I I 'fhe Riley Group, Inc. a� I