Laserfiche WebLink
<br /> <br /> <br /> <br />- 3 - <br />dnd 1n5t'.1~~tlOn Of t^° t3nwS. Tfl?5° 510^?S ShoUl~ 0' nro=?rl~ <br />protected a.idinst d~verse conditions-such as drainage and erosi~,n, <br />seeps^e or surcharge loadings. ?ear vertical cut f:c?s s!:on1r h? <br />oossible aitnin the and=rl~ing oedrocl:. Exc•:vation into t`ie <br />Sl l.tstOn°-San~S tone De!rOtk ShOUId qe ;'rOS51 ale awl to h9avv ri dn~r tvn° <br />equip,nent, dl t~ld'1gh SU're lint Dl astl ng -13;' 3150 7°_ r?il~li r?; N~7er? <br />ce'lent=d sandstone lavers are enCnuntere~. :Jd t°r :rill ~~ e'1~~'in`?r?~ <br />in t;ie excavation; }io:+ever, after th? initial sure, this s7oule <br />di^rinish.. Suao ~n~ninn frd~n.tirithin t're e:ccavation in cnr.i~rnct,l:,^ •.~irh <br />Stid110:1 dr3i nd^e trent!re; S'10U1d Oe d0egU8te. A~C1 ean, fret !r rai^.1'!~ <br />gravel la:~dr '-+o~rld i~rrrove trafficability. <br />. Tanis shOUld i!? '.lZSlr.•io7 t0 rE515t C1y:irOSidt1C uplift Dross!;rat <br />2nL'dl Lod 7re55Ur? at 12dSt that of a fre= ~+?t?r lev?1 dt !.Un ;7f <br />bedrock surface unless 3n undendrain s.YSte^ is ~rovidea. Th? <br />underdrain sYSt^~~ s;~ould.COnsist of a oer•frrated amine install?~'! in a <br />gravel-filled trench ~elo•,~ tht base of the tanl•s lea~ino to j su~^ <br />Where wd ter Can Ue rC70V9~ m~ nJ'~ipl nn Or nrBVlty fl0•d, 4 (lean nrgvgl <br />leVelln, COUrS?.ShOUId b2 prOVtded at. U12 035? U* t'12 tinZS ?~~ <br />connected to tne_under•?rain s;~st?~. <br />SJ~ FALE_ .`~~a I:IAGE <br />Satisfactory perfornance of the ~i ire faci 1 i ti es :~i 11 d?~enn i n <br />part on controlleG ~ois'ture condi*_idns td r2duca potential r. i.rfer~ntial <br />movee+ent. Th? follo:~inn r!riinar? nrecau*_i^,ns shn~:l~ b? .r?<~rv~-+ !:,ri^~ <br /> <br />E_ <br />~~ <br />