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Ba,cd on thc rcsulls u! thc cuncnl suhtiurfacc cxploration programs anJ if Ihc <br />rccommcndmions lor subgradc prcparation are Ibllo�ccd. ���c anticipatc that thc allo��ablc <br />soil bcaring capacity of thc dcnsc nalicc soil is d000 psf and lor Ihc strucuirai lill is 3000 <br />psf. 'fhis mcmis ihat Ihc sitc is adcyuatc for Ih� dcsign loads :is statcd b� Valmont <br />Structures. <br />Sitc Urainage and Erosiun Considcr:�tions <br />Cimundwatcr Conlrol <br />Ground���atcr was cncountcrcd in our tcsi pits at Ihc timc of rsca�-ation. I hcrclorc. thc <br />contraclor should :�e prcparcJ lo handlc eruund��atcr or sccpagc if it is cnco:mlcrcd <br />during sitc prcparation. <br />Surlacc \�'alcr Control <br />Surfncc runol7 can bc conlrollcd during construcliun h�� carclid grading practiccs. <br />'I'ypically. thcsc includc thc constructiun of shallo��, perimctcr ditchcs or lo��� carthcn <br />bcnns and Ihc usc of tcmporary sump pumps to colirct rmio�T and prevcnt ��atcr Gom <br />d.�maging csposcd subgradcs. In addition, mcasures shoidd hc takcn to avoid <br />impounding of surlacc ��atcr during construction. <br />I:rosion Contr��l <br />During construclion at thc sitc, crosion control dc��iccs. such as balcs of stra�� and/ur <br />gcotcxtile silt Icnccs should bc stratcgically locatcd to control crosion and thc movcmcnt <br />of soil, implcmcnlcd as neccssar�. "fhc crosion control dc��iccs should hc in placc and <br />rcmain in pincc throughoul site preparation and construction. \Vc reconunend that crosion <br />control mrisures implcmcnlyd nt �hc silc cnnliirm ��ith st;uc DOI: appro��cd "f3csi <br />�9anagcmri� Practiccs... <br />Scismic Ucsign Critcria <br />Gcncral <br />f)csigu ground acccicralion li�r thc projcct ��:is dcicnninrJ using results �i�um thc USGS <br />�vcbsilc. bascd on Ihe A'uliu��o/.4��ia'wic lln_urcic ,II[l�l�)711L� Prujcc� complcicd by USGS in <br />2003. 'fhc pcak ground acccicratian (PGA) at �hc prqjccl tiitc is approsimatcly 0?8g. <br />bascd on horizonlal bcdrock arccicrations associatccl ��ilh :i 10 perccnt probabilit� of <br />r�cccJancc in a �0-ycar peri��d. <br />Soil I.iclucfaction <br />I.iquclaction occurs �vhcn loosc, s�ituraicd. cohcsiunlcss. puurly gr.�dcd sands tcmporarily <br />losc s'ir.v strcngth :�s a restdt of incrcascd porc pressures induccd by vibratiun or <br />c.ulhc,uakc shaking. Primun' lacturs contrulling ihc dcvclopmcnl of liyucfaction inciudc <br />intcnsit� and duration of strong ground motion, charactcristics of subsurfacc soil <br />induJin� suil t�pc. rclativc dcnsity. gradalion. and agc of depusils, in-situ slress <br />cundiliuns and �hc dcpth to ground��alcr. Potcnlial cl7ccts uf soil liqucl:�ction includc <br />tcmporary luss of bcaring capacity and Ia1cr,�l soil resistancc. and c�ccssivc sctticmcnts <br />upun dissipution of thc csccss porc pressures. <br />Gculcchnical anJ�funnd Conailt:unz <br />17270 \4aidincdloRcJmonJ ItJ. SIc 703 I'honc N?514x6-65GI <br />N'malmcdlt. \\b1 yHlq2 I'ago h fu� (a=51 dN� 2/{�U <br />