dale ▁Inter modal ▁Fac ility ▁- ▁a ▁major ▁( if ▁not ▁the ▁main ) ▁rail ▁fre ight ▁terminal ▁in ▁Per th . ▁ ▁The ▁section ▁between ▁K ew dale ▁and ▁Wel sh pool ▁is ▁now ▁closed . ▁The ▁rest ▁of ▁the ▁line ▁was ▁replaced ▁in ▁ 1 9 6 8 ▁by ▁a ▁new ▁route ▁to ▁the ▁east ▁of ▁the ▁new ▁For rest field ▁Marshall ing ▁Y ard . ▁ ▁K ew dale - K win ana ▁and ▁the ▁East - West ▁Australia ▁rail ▁cor rid or ▁ ▁Prior ▁to ▁the ▁ 1 9 6 0 s , ▁the ▁majority ▁of ▁rail ways ▁constructed ▁in ▁Western ▁Australia ▁were ▁built ▁at ▁narrow ▁gauge , ▁with ▁the ▁exception ▁of ▁the ▁standard ▁gauge ▁Trans - Austral ian ▁Railway ▁linking ▁Western ▁Australia ▁with ▁South ▁Australia ▁at ▁Kal go or lie . ▁In ▁ 1 9 6 1 ▁the ▁Western ▁Australian ▁Government ▁passed ▁the ▁Rail ways ▁( Standard ▁G au ge ) ▁Const ruction ▁Act ▁ 1 9 6 1 ▁to ▁construct ▁a ▁standard ▁gauge ▁railway ▁between ▁Per th ▁and ▁Kal go or lie ▁to ▁facil itate ▁the ▁movement ▁of ▁inter state ▁fre ight . ▁ ▁The ▁following ▁new ▁rail ways ▁were ▁constructed ▁and ▁existing ▁rail ways ▁upgrad ed ▁to ▁dual ▁gauge , ▁with ▁construction ▁complete ▁by ▁ 3 ▁August ▁ 1 9 6 8 ▁The ▁Mid land ▁J unction - K ew dale ▁line ▁was ▁converted ▁to ▁dual ▁gauge ▁and ▁then ▁r er out ed ▁around ▁the ▁new ▁For rest field ▁Marshall ing ▁Y ard . ▁A ▁new