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( <br /> ( <br /> ( EXCAVATIONS <br /> � I:xcaca�inns arc nol anticipatcJ w bc grcalcr ihan 4 �cct dccp. Ho��c�cr. cscavations grcalcr than �3 icct <br /> � dccp um likdy hc madc as irmporar�� opcn cu� slupcc dcpcndin� un sitc cons�rainls. Hsca��alions ma�. <br /> also rcquircd liir undcrgruund ulilitics. l'hc s�ability ol' opcn cu� slopcs is a tunclion of soil t�pc. <br /> ( ground��:itcr sccpagc. slopc inclina�ion. slopc hcight and ncarhy sur�acc loads. Thc u�c of inadcquatcly <br /> dcsigncc: opcn cuts could impacl ihc slability of acijaccnt �cork arcas. cxisting utililics, and cndangcr <br /> ( pcisonncl. <br /> ( Tlic conlractor perlimning thc ��ork has tlic pritnap� responsibiliry fix protcction of �corknun and <br /> aJjaccnt improecmcnls. In our opiniun. thc conlractor ���ill hc in Ihc bcst position lo obscn�c suhsurfacc <br /> � condilions co�itinuously Ihroughout �hc consuvction proccss and �u respond �o �ariahlc soil and <br /> � eruund��alcr condi�ions. Thcrcfin'a �hc conlrac�or should huvc ihc prim:iry rcsponsibiliq� liir dccidin� <br /> �chclhcr ur nol io usc opcn cin slopcs �in much ol'Ihc cxca�ations rathcr than somc liimi of tcmporary <br /> � cscac:uion suppor�. and liir es�ahlishing thc salc inclina�ion of thc cut slopc. Acc:ptablc slupc <br /> inclin;uions Ibr utili�ics and ancillary cscacations �hould hc dc�crmincd durin� conslniclion. f3ccausc of <br /> � �lic Ji�rrsily of constniction �cchniyucs and acailablc shoring sys�cros. thc dcsign of icmparary shoring is <br /> most appropriatcly Icll up to Ihc cunu:icior proposing tu cumplc�c ihc inslallntion. Tcmporary cut slopcs <br /> � ond shoring musl compl�� ���i1h Ihc procisions ��f'I'itic 29G \1'AC. Part N. "Fsca�ation. Trcnching and <br /> Shuring,.. <br /> ( l�hc cxr.ica�ions �cill bc cumplcicd prinru'ily in lill anJ mcdiwn stiff lu vcry stili'sih and clay dcposils. <br /> ( Thc follo��ing scctiuns xummarirc tlie �cnc�al cscacaiinn rcconuncndations. I( conditiuns allo�v. <br /> csca�mions lin �hc propuscd huilding m;�\' ht aCcomplitihC[I Utiing Icnl�to�7rv cul slopcs. <br /> � <br /> Temporary Cut Slopes <br /> ( For planning pinpuscs, tcmp��r;u� unsupporird eut .lopc, nwrc ihan a fcct hith mny hc inrlincd m ?I I:I�' <br /> ( mazimum siccpncss �ciihin Ihc sil� and cl;iy soik ;md nu slccper Ihan I SI1:1 V in ihc dcnsc glacially <br /> consolidnicd soils. 11' signilir,mt scc��agc is prescni on thc cul facc or if Gactures and shc:u runcs :nr <br /> � cnruumcrcd in thc sili nnd clap dcpnsiis thcn thc cul slopcti may hacc io bc Ila�tcncd. Ilo��cccr. <br /> � icmpor;uy cul� tihould bc di.cu�srd �eiih Ilic pcoirchnical cnginccr dwing tinal dcsign dccclopmcN to <br /> ca:duaic suitahlc rul sli�pr inrlinalions tiu ihc cariuus purliuns uf ihc cscava�ion. <br /> ( Thc abocc cuidclinc� assumc ihat surlacc In;idc �uch ns uat7ir. construc�ion cyuipnunl. �tockpilcs or <br /> ( huilding supplics �cill hc kcpt a�c:iy liom ihc t��p of Il�c rul slopcs a sut7icicnt Jistancc so ihal �hc sinbility <br /> uf ihc csca�:uion is nol ;dlccicd. \Yc rccommenJ Ihal this dis�ancc hc at Icust 5 Icct Gom �hc top of�hc <br /> � cul fin Icinporary cWs maJr at I.SI I:I`r or tl;mcr. <br /> � "I�cmporar� cu� slupcs shuuld hc pL•;nncd zucli ih;u ihcy do nul cncruacli on a III:iV iMlucncc linc <br /> prujec�cd do��n li'um ilic cdgcs of ncarby��r planncd li�unda�ion cicmcnls. <br /> ( \\':ucr cnlcrine c�ca�alions mucl bc cullccicd and ruutcd a��:iy liotn preparcd subgradc arcas. \Vc c�pccl <br /> ( Ihat lhis map hc accomplishcd by insialling a s�sicm uf drainn�c dilchcs and sumps along Ihc iuc o(ihc <br /> cut slupcs. Sunm sloughing ;md raccling ul�hc cul slopcs should bc cxpccicd. Tcroporary covcrinE. cuch <br /> � ns hca��� plastic shcciinc ��iih �ipproprialc ballast. shuuld hc uscd to piaicct �I�c�c slopes during periods of <br /> �cci �ccaihcr. Surl:irc ��:rtcr nmoll' 1'rom abu�c cut slupcs should bc prcccnicd I�rom Ilowing ovcr ihc <br /> { slupc Cuc hy using hcrms.drainaec ditnc�s. s��alcs or othcr apprupriatc nuthods. <br /> � I(Icmpor:u� cul slopcs c�perirncc cxccssicc cluughing ur raccling durin� ronslniction, it ma� bccomc <br /> � ncccssaiy to nwdi�y ihc rul slupcs iu mainlain s�ic ��urking cunditions. Slopcs cxpericncing problcros <br /> r <br /> fhlr \n •e;i,-nrr.im . PGf;P 9 GEOEMGIMEEII� �� <br /> � Juh�/'.:uu� / j(� . <br /> � <br />