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producrd h�� ruulin� cyuipmcnt dircclly un ihe gl;iri,il soils in �ccl �ccathcr. 'fhcrrli�rt. fo protcct Ihc <br /> �u��Lt;idc soils and lu pro�'idc an adcqu:uc �ccl �+r.uhcr �cotkin� �urfacc fur Ihc cnntraclor's cyuipmcnt <br /> ;ind lahor. �cc rccomntcnd th;it ihc cunu;ic�or prulccl cspuscd suhgradc soils �cith sand and gra��cl. <br /> eiushcd cr:n'cL ur ATI3. <br /> Permanent Cut and Fill Slopes <br /> \1'e rccommrnd Ih:d p,�rm:mcnt cut or lill .lu�ir� hc .im.trucicd ;it inclin:ili��ns uf_'I I:I\' nr IlaUce and h� <br /> hlcndcd iiuo csi.ting �lupcs �cilh �moo�h Iramilions. c�rc��l ;u li>Iluvrs. Prnn;mcnt cut �lopcs in ihc <br /> 11'ansitiunal Bcd dcpusits should bc no stccper Ihan 31 I:I�' anJ may h;ivc to bc tlnticncJ depcnding on thc <br /> actu;d cut cunditions. To �ichicrc unifi�rm cumpaclion. ���c rccuntnund Ih.d fill slopcs bc occrbuill <br /> sGeluly ;md suhsequeully cul haek to expuse �t'cl6cuntpac�cd lill. <br /> fn reduce crosiun, ue�vly cun�truc�ed slupe, �hould he pl:mled nr hydruseedcd shonly alier completion of <br /> gradiitg. Until Ihc ��cgclaliun is cs�nbli�hcd. mnu' tiloug!iing nnd racclling of thc slopcs �houW bc <br /> expccicd. This may ncccs.i�aic loralizcd repnirs :md resccding. Tcmpor,uy cuvcring. snch as cican c�a��y <br /> plaslic shccling, julc I;ihric or crusiun cunlrul hl;mkc�s (tiuch as ;`,incnc:ui Psccl,inr ('utira I nr Nrnlh <br /> Amcrican Grccn 5190)coulJ hc uscd lu prolcci thc sln��cs during perii�d. nf rainGill. <br /> iltility Trenches <br /> lrcnch cxcac;itiun. pipc bcdding. ;md hcnch barklillim� ,h„uIJ hr �umplcicJ u�in� ihc _�ncral <br /> prnccdm'cs dcscribcd in thc 200G \VSI)O1' S�and;ird Sprcitictuions or uthcr suilahlc pruccJurcx spccilicd <br /> hy tl;c projccl cicil cnginccr. Thc nati�c �lacial lill, lransilional I3cd Jcposils. and lill soils cncutuvrrcd <br /> ;it thc sitc�irc gcncrally of luw con�usivity bascd on our c.�pericnrc in �hc Pugc� Sound airca. <br /> 1'tili�v Ircnch b:icklill �hould consist ol' sh�uciural lill ;md slwulJ bc pl.iccd in lifis ul� ti inrhes ur Ic,s <br /> Un��sr Ihickncss) sucii Iha1 ndcqu�uc cumpacliun can hc acliic��cd lhruughuul thc lill. Sand hacl.lill. <br /> cuntaining Icss than i perccni tincs, m�rv hc comp:ictcd in �unsc lilis no1 cscccding I Z inehcs �chcn placcd <br /> hclmc licc Iccl uf �hc linishcd gruund surl;icc. li;ieh lill n�us� hr compac�cd prior lo placing Ihc <br /> .ubscyucnt lifi. Prior lo compaction. ihc hackfill shnulJ bc muis�urc cunditi�mrJ lo ���iihin 3 perccnl uf <br /> Ihr i,��tinmm moisUnr c��Nrni. if nrrr,.ary. Il�r h;irklill .huuld bc i�,u��arlcd in accordancc ��ilh thc <br /> crilcria discu�scd ahi�cr. I'i��urc (� illu.ir:ilr. rrrnnir.irnJrd Irrnrli �„mp.�r�iim rritcri;i undrr paccmcnl <br /> ;m�l nun-clrurnnal nr;u. <br /> Sedimentation and Erosion Control <br /> In uw� �qiiniun. Ihc crusian pnlcn�i;il ��I �hr nn-.iic .nil. �. I���� t�� modcr:iic. (��m�u�ur�iun acli��iiics <br /> in�Illlllll_L' SII'I�l��lll_L' IIOII LffIlI10� N'III c�p�,.� .��il. lo ih� rnr.i�m rflcct. ��(�cind :nd �caicr. Thc amounl <br /> anJ pulcnli:d inip.icls ul crnsiun arc p,utl� rd;ucd lu fnc tinu ��I')car Ihat cons�iurli��n artuall� orrur.. <br /> N'ci ���r.ithcr cunslrncliun ���ill incrcnsc ihc amuunt �u•d c��cnt of crusiun nnJ poicnual �rdimcnlaliun. <br /> I�ru,ion and scdimcnlatiun conu'ul mc:uin:c may nc implcmcntcd hy using n combinniion of intcrccpior <br /> .��alcs. su:i�c hnlc hanicce, sih Icnccs ;md slra�c muldi li�r�cmpuraiy crusiun prolcctiun ol cxposcd suil.. <br /> �II �IisuuluJ ar.;is shnuld hc finish �raJ�d .mJ >rcdrd as suon ;is praclicahlc iu rcducc ih. risk uf crosion. <br /> I n�.ion and scdimcntation cnnu�,l nxu.urr. .h��uld br in.l;illcd and maimaincd in .�ccurdanrc ��ilh �hc <br /> rryuirrmrnt. ��f�l�r ('ite nf I'c�rc�i. <br /> 1.;, „ " ����r n i Pn,�C% GEOEHGINEEFS� <br /> 1.,,..,.i i , . . r <br />