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y.
<br /> 4
<br /> 3
<br /> C_
<br /> 10,
<br /> P1
<br /> rlr•II No 2 luc: rtr:d at thf! :Ovth encl er:trarcce rau;l, t.uetht---,
<br /> r avati.ctl, h l)e�c;n p 11 1 y clt;g otlr l;y cy:-:cavatinc
<br /> aelu:il rre•,tt„ Thi.. ,ras shnwa i n '..hec - c 1L1-u%ry 1 , 1990 report- by
<br /> ]1ts11tr.n ;:1,c3 ;'! -.;c��:i�ct.es i:l l;l;ui:oc]t:�il:h'� of t.l;r� cxcava�.io[;.
<br /> Thf phot c-)yrap"Ih; are ric;L bc�ir,y re l,t'ucletc:f cl herein l:ecauue of
<br /> the problr:III of color rUl)rociuc.tir>>�. 'f'hc. drilling 1 O o.f I511 ii
<br /> 2 is 4ttaC:I19l, On t1,is illts5tratic,rs, the Z:lrl,ru;;ienatu depth
<br /> of omravati.on and the top of i:he pipe stub a)-e shown, The
<br /> clepths cannot 1:f: acc:ul-eetc�ly ii::tci laecattse all survey, used
<br /> an arlAtrar.y ruxerence elevatio[l. The bottom of the pipe ex--
<br /> cavatiorl and the tole of the tetul, :•tel-e i n f e r r e d by
<br /> correlating the photogr-,-'ph, i;i 1 igure:� 10 a d 12 of the
<br /> 2/l/90 report wit.h the 1 i t.hc,l o fy shoures or, the GTI,."Jo l l log.
<br /> Althaucil7 almost one ilcllf of the cemented pipe has been re--
<br /> [noved, ac, a(ICCI t,te scall slsatllcl still exi si_ at,d the pipe at,cl
<br /> :3tczb trill be l;uried under abc;it to feet of soil when the
<br /> excavation is refilled. A small W,10klnt uf" arout putlred
<br /> around L-11P base of the pipe •tub when it is being filled
<br /> with grout could hell, l,revf:r,t t.1,e estal,lishn;en- of a conduit
<br /> by ch,-.mneling.
<br /> At we.l l ii 3, the rlartherly Ute 11 , t1,Er pipe ::tub and grout
<br /> sheath cannot 1)e seen and the pil,•,� protruding from the
<br /> ground might not 2,e: surew corir,rWc vcl to the ;'Jell Pipft.
<br /> Therefore, it is recommended that the pipe be dua out until
<br /> tyle cerner:t: is located and there the: W011 be plugJe�d
<br /> with grout and a base: cap be pourescl around the stub.
<br /> r 11i t), tl,c; acid i'ti ona 1 wor? llot.ucl al:uvu, it is believed that
<br /> elle yroulldwater ran be adequately protected by fi.11itig the
<br /> C.a.;ir;c_f:, with gro ;t. Excavation of the: ent;:ire gull hiller,
<br /> grout ahoath, liner utr- , i:: :;ut be leaved to be ;warranted by
<br /> this ;•:niter, E;l:ci if du::c, e2uulri r,ni. noce:srtarily provide: any
<br /> more protection than tele li,,Lthods suggested above.
<br /> Very truly yatirs, -inr
<br /> Dennis R. ;,11en t e
<br /> For: fiuilter t: Rssociates. �% \ c:._::_..,1 �, �t
<br />
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