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1 n minimvr rn��iun. nr��h run.iru:ieJ ,Inp�� lhuulJ hr �.luntrd��r h�dro.crJ�J tihnr��y a�icr cumplcuun <br /> uf gr:iJinp. 11'c rcrunmicnJ �h:�t un cru�iun runirul hlonl�ct wch :u Curlcs I Imanul:icturcJ h} :imcri:an <br /> I'.�crlsiur('uJ ur til SO Im;muCacurcd hy Nonh lmrric;m (irccnl Ix placcJ on pcnn:mcro slnpcs io hclp <br /> cslahli.h �cgcudiun ;mJ miniraizc crusion un slupcti m:idc ul iill soils. Until thc ecgctation is cs�ahlishcd. <br /> .omc tluughin� nnJ r:n rling ullhc slopcs shuulJ hc czpcctrd. LucalizcJ rcpnirv and rcccgctation m�y hc <br /> �icccss;iry in arc;is �chrrr �luuchui� and ra�clin�:ur�urs. I Ica�y su:i�c midch cuulJ hc uscd lo prolcct thc <br /> ,i��r�,�i��r��,����;���i. ��r�;�n��:�a :� ,�i,i�����,t�i��• ,,,�� x;i���n. <br /> 4.3.12 Ut(Iity Trenches <br /> Ircnch c�racaiiun, pipc huddin�. and irrnrh h:�c6lillim� ,h��ulJ ha c„mplcirJ ming �hc ( i�� ul' Pcrrru <br /> tiumd:ud Dctnil. <br /> liui��y r�r�. �i,�,��id i,� bcddrJ m �anJ and ur .mnu�h ruundcd gr:��cl. Additiun:dh. �cr rccummcnd �hal <br /> die ��n� be co�'ered u�ilh heddinr nt;ucri;d to ;il I�a+l une fuul abu��� Ihe pipe. �I�hiti hedd�ng malori:il <br /> +huuld hr lightly tampcJ intu placc. NacAlill placcJ ahu�c thc hcdding matcrial shall runsist uf s�ructur�l <br /> fill yu;dily m+rtcrial nti di:ccx.cJ ahucc. <br /> I'tilily Ircnch harklill cnn bc placcJ in liliti ul' 12 inchcs ur Ictis Iloutic thicknctitil hclu�v a dcplh ol'S icct <br /> frum liniah �;radc. �1'i�hin 5 �irt uf tinish gradc. back�ill }huuld bc placcd in litis o( R inchcti or Icsti <br /> Ui�ux thickncssl ����6 ihat ad:yumc rompnrtion can hc achicved �hroughuut thc litl. i:ach lili mu,i hc <br /> ����„i,;�.��d ��;,.,� u� �i;��•�„� a,� suhscyucni lili. Utility trench backlill shuulJ bc compacicJ �o at Icatit <br /> 911 p�recnl �11)U hclua 2 I�:ct uf tiuhgrida. ��'hilc Ihc ����« '_ Iccl tihoulJ bc Contpa�tcd lo nt Icatit <br /> 95 �icrccnt 111)U. Pnu� lu :u��ip;iciiun, thc hackiill shuu':; hc moisturc cunditioncJ w ncar optimum <br /> inuislurc conlcnl, if ncccssan'. Iha hncklill shuuld hc compactcd in accord:mcc �rith �hc critcri�i <br /> dixusticd ;ihu�c:ntJ ati tihu��n in 1`igurc G. <br /> II' pus,ihlc. �c�• rccommcnJ iha� hclu�� Eruund utili�ics ;icoid �hc concrcic nibhlc orca. Di�licul� <br /> csca�a�ion rnaJitio�u may c�isl in Ihis arca .md nwst uf thc csca�atcJ malcrials ��ill likcly bc unsui�ahlc <br /> ;is ba:klill. if u�ilii� trrnchcs nccd �n h�: cunsuvctcJ in thc runcrctc nihblc arc:i. �cc rccummcnJ th:�i ❑ <br /> Ecutca�ilc �,cparator I\1ir:di (�UOX ur cyu;dl br pl;irrJ in �hc trcnch priur to pl;icing ihc hcdding maicri;ds. <br /> Wilirv. .md hacklill. <br /> 4.3.19 Dralnage <br /> All pruund surLiccs. p,i�rmrm, ;md �idc�call.� ,hnulJ �lupr :��c;iy �iinn Ihr huildings. Surl:�cc �aucr <br /> runo�� shuul� h� runtrull¢tl hy a ti)'sletn uf curhti. henna, drain�igc s���alati. :mtPur calch ha+in,. :md <br /> Ji.rhargiJ imu a swm�a;urr cullcciion syst.•m. Ruul drains should hc tight-lincd to dischargc intu dic <br /> ,t�niva'atcr rollccliun s�slcn�. Ihc ruuf drain lincs sho�dd hc ��;itcrvti�ht, und if pussiblc, roulcJ a�cay <br /> ti�an Inu� aJj;icCN lo)dtC hnllJin� Iho�(tnnis. <br /> In :iJditinn. w lirip prc�cm p���rntial Jilfcrcnti:d sctticmcnt uf undcrlying lill SOII 10 l'8til` U� 8 IC.II�. UY <br /> irr�nnmrnd ihat .tunn drain linrs ;mJ ��:itcr lincs hc locatcd as ILr from thc building perinutcrs as <br /> p��..iblr: altliuu�;h. ��c unJrrsumd dcu I:ucrals ��ill hc nccc,sary liir thc�catcr cunncctions. <br /> 4.4 PFELOAD FILL <br /> \1 r irruininri�J pl;irinc a ��rrinad Illl in Ihc ;uca ul'thc prupuscd huiidings :md o�hcr scttlemcni-scnsili�c <br /> .truriwr,. I hr pur�,��.r �d dir �,n9uaJ till i. io prc-mduct a majur purtion o(�hc sculcmcnt �hat «uuld <br /> -------- - – -- — <br /> �,:, ,� �. . �„�,, _� PaA�•�s GEoErwiraes� <br /> „� , _ ���„ � <br /> L L <br />