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� <br /> I <br /> 1 I hr rcutr�tilc �h:ill b� ;nta�hcd nn thc u��-�Ic,pe sid� ��f tl•�c po�;, :uiii <br /> suppc�i� s��stcm ��ith staplcs, a ire. nr in accordancc �+ ith thc <br /> � manuf�acwrcr's rccommcndation,. I hc gcotcxtilc shall bc att�chcd i�� <br /> thc posts in a m�nncr that rcduccs ihe rotcntial frn•gcotcxtilc tcarinp ;�i <br /> thc staples. ���irc. or rnhcr conncctiun dc��icc. Sili fcncc back-up <br /> � suppn�t for ihc gcutcxtile in the fonn of a wirc or plastic mcsh is <br /> dependent on ihe propciYies of the geote�tile sclectcd tbr use. I1'wirc <br /> or plastic back-up mcsh is used, thc mcsh shall bc fastcncd sccurcly to <br /> � thc ur-slopc of thc posts wi�h thc gcolextilc bcing up-slope of thc <br /> mcsh back-up support• <br /> 'I'lic geote�tilc at the Uottom of ihe Icnce shalt Uc buricd in a trench to <br /> � a tninimum depth of 4 incl�es below Ihe ground surlace. 'fhe u�ench <br /> shall be backfilled and the soil tamped in place over the buricd poiti�m <br /> of the geatextile, such that no (low can pass beneath the icnce and <br /> � scouring can not occur. VVhcn wirc or polymcric back-up suppnit <br /> mcsh is uscd, thc wirc or polymcric mcsh shall extcnd into thc ucnch � <br /> minimmn of 3 inchcs. <br /> � "1'he tencc posts shall Uc placcd or drivcn a minimum of I S inchcs. A <br /> minimum dcpth of I'! inchcs is allo�t�cd if topsoil or othcr sofl <br /> � subgradc soil is not prescnt and a minimum dcpth of I R inchcs cannot <br /> bc reached. �cncc post depths shall 6c incrcased by G inchcs if thc <br /> Icncc is locatcd on slopcs of 3:1 or stccper and dic slope is <br /> � pcq�cndicular to thc fencc. If rcquircd posl dcpths cannot bc obtaincd, <br /> �hc posls shall bc adcquatcly sccurcd by bracing or guying to prc��cnt <br /> ovci�tuming of�he fence duc to scdimcnt loading. <br /> � Silt fcnccs shall be locatcd on contour as much as possiblc, cxccpt ai <br /> the ends of�hc fcncc, whcrc the fence shall hc tumed uphill such that <br /> thc silt fencc captw•cs ihc ivnoff�vatcr and prcvcnts �vatcr from <br /> � tlowing around thc cnd of thc fcncc. <br /> Iftl�c fence must cross contows, wilh the cxccption ofthe cnds of ihc <br /> f'ence, gravel check dams placed pe�pendicular to the back of the lencc <br /> � sh�ll bc used to minimize concentratcd (lo�v and erosion along the <br /> back of the fence. Thc gravel check dams shall be uppro�imatcly 1- <br /> (oot dccp at thc Uack of thc 1'cncc. It shall be continucd pcipcndicular <br /> t to the fcncc at thc samc cicv�tion wuil thc top of the check daro <br /> I inicrcepts thc giround surfacc bchind thc fcncc. Thc graccl chcc�: dams <br /> shall consis� ofcrushcd sw•facing basc coursc, gravcl backtill 1��r <br /> � �valls, or shouldcr ballast. Thc gravcl check dams shall bc locatcd <br /> evcry 1 U fcct along Ihc fence�vherc the fcnce must cross contours. <br /> l'hc slopc ol'Ihc I'encc linc ���herc contours must be crosscd shall noi <br /> � be stccper than 3�I <br /> Wood, stccl or equivalent posts shall be uscd. \'�'ood posts shall ha��c <br /> � minimum dimensions of 2 inches h,y 2 inches by 3 fcet minimum <br /> Iength, and shall Ue fi•ee of defects such as knots, splits, or goubes. <br /> fq-gG Volume ll—Conslruction Sformwater Pollulion Prevention February 2005 <br /> � �z <br />