▁Railway ▁Act ▁ 1 9 6 8 ▁with ▁a ▁bal lo on ▁loop ▁at ▁the ▁termin us . ▁The ▁southern ▁portion ▁has ▁not ▁been ▁constructed , ▁and ▁access ▁to ▁the ▁Loop ▁Railway ▁is ▁reli ant ▁upon ▁the ▁triangle ▁intersection ▁at ▁K win ana . ▁ ▁The ▁Department ▁of ▁Transport ▁has ▁identified ▁the ▁K win ana ▁triangle ▁is ▁now ▁approaching ▁capacity , ▁and ▁it ▁is ▁seeking ▁alternatives ▁in ▁order ▁to ▁ensure ▁that ▁future ▁growth ▁in ▁rail - h au led ▁fre ight ▁can ▁be ▁accommod ated . ▁Comple tion ▁of ▁the ▁southern ▁portion ▁of ▁the ▁K win ana ▁Loop ▁as ▁planned , ▁between ▁the ▁C B H ▁bal lo on ▁loop ▁and ▁the ▁K win ana - M und ij ong ▁line , ▁is ▁an ▁option ▁being ▁considered . ▁ ▁In ▁December ▁ 2 0 1 5 ▁the ▁City ▁of ▁Rock ingham ▁public ised ▁its ▁ob jection ▁to ▁the ▁re inst at ement ▁of ▁the ▁extension ▁of ▁the ▁loop ▁railway . ▁ ▁K win ana - M und ij ong ▁The ▁K win ana - M und ij ong ▁line ▁was ▁constructed ▁to ▁connect ▁K win ana ▁with ▁the ▁South ▁Western ▁Railway . ▁The ▁line ▁also ▁extended ▁to ▁Jar ra hd ale ▁and ▁one ▁of ▁the ▁main ▁purposes ▁of ▁the ▁line ▁was ▁to ▁transport ▁b aux ite ▁between ▁Jar ra hd ale ▁and ▁Al co a ' s ▁Naval ▁Base ▁ref in ery . ▁ ▁The ▁K win ana - M und ij ong ▁line ▁is ▁one ▁of ▁the ▁few ▁narrow ▁gauge ▁lines ▁in