|
_ r
<br />~~
<br />4festcrn AssocinLcd Curl fail,. Ilrtul,cr 'l '[, 1'lH] Page 2
<br />Dur recommcnrtation i;: t.ho1. 11u• dr~„n;,,l, 1 i,•nch be insCullud al
<br />such a location that r+]Lh :, dclltl7 of :,l,l,ruxii,u,lcly ::ix fact
<br />maximum, the drain line o-ruuld intercept. Llir. inlurfacc bet~+ecn
<br />the original hills.irJr_• and Ll,c nc~r fill :;lul,c. If the drain line
<br />is located in t1~is pu;;it.ion, it gill inLcrr.cpl. any acr:page flows
<br />between the fill ^nd Lhc original slul,c Ch;,L r:~oulrl be tending
<br />to cause sliding, inalahility, :end rui~~;nlid:~lion of the fill
<br />malcrial. Dctaila of the dr:;ign Lr,r~ch, LIn: :.ix inch perforated
<br />pipe to be installed in t.hr I,ul.tum of ll'~e 1.rcnch, ~,nd bockfill
<br />are shurrn on the cnr_ln:.crl dr:,vinrl.
<br />We recommend that, inaccurdo,i~,:c l:iLli your r1l,l~licnlion C-D47-O1
<br />for the 61uu Ribhnn Caul Idinr:, you I,rrfi~rr, :, ,]colcchnir,al
<br />investigation of Lhe hcncl, :irr,a , the invc rtignt.iun should furnish
<br />us o-rilh the location ;aid dr•plh of Il,u fill m;,tcriol, Lhc iuLcrface
<br />between ibc fill mo,Lerin] ;,nrl LI,c uri,linr,l :;lul,c, a sL:,bi]iLy
<br />safr.ty factor for this; ::lul,c, :,iicl iiii,~~inn;inn fur designing the
<br />filter ma Lerinl Around Lhc six .inch l,ipr,. /liter receipt of Lhc ~`
<br />geotechnical infornr-•ll.ion, vrc trill cuwplclc Lhc design of the
<br />drainage systum trench .;i:; rlirr~u::rcrl I,crcin. 'r!c du not rr.cumrnend
<br />construction of Lila ,Ir,,iu;,,lu I rci,cl~ ui~1 i l :~ftcr r nmpletion
<br />of Lhc gcotcchnic:,] :~n;,]y::i::. Il i:: nor no,l, r:;l:u~dinr] that this
<br />analy.^.is wlll he Cunil,lClc :in~l Lhc infuin~.,l inn :•hnuld be
<br />available by mid Dcrcmhn_r, 1'+111.
<br />I f you liavc nny rluc::l. i alit rc,l ~rdi i~,l l.l~~• i ~ ~ ui.;wcu,lud [nrrk, please
<br />call Llris office.
<br />C~~/~--~
<br />E. LeRoy Rl:,ck
<br />EL[3/ab ~
<br />enclo~ures
<br />
<br />
|