▁dies el ▁engine ▁and ▁a ▁variable ▁hyd ra ul ic ▁drive . ▁Most ▁of ▁the ▁carri ages ▁were ▁built ▁in ▁ 1 9 7 8 ▁and ▁upgrad ed ▁in ▁the ▁ 1 9 9 0 s ▁to ▁allow ▁for ▁sm o other ▁and ▁more ▁comfortable ▁ride . ▁ ▁Dam ages ▁and ▁dis continu ation ▁of ▁tour ist ▁transport ▁ ▁In ▁November ▁ 2 0 1 1 ▁a ▁leak ▁in ▁the ▁Water care ▁ 6 0 0   mm ▁diameter ▁main ▁triggered ▁a ▁substantial ▁s lip , ▁taking ▁out ▁a ▁ 1 5 ▁m ▁long ▁section ▁of ▁the ▁adjacent ▁tram line ▁with ▁ 6 ▁m ▁of ▁track ▁left ▁d ang ling ▁in ▁the ▁air . ▁The ▁line ▁has ▁been ▁closed ▁for ▁tour ist ▁transport ▁since ▁ 2 4 ▁November ▁ 2 0 1 4 , ▁but ▁can ▁still ▁be ▁used ▁by ▁its ▁owner ▁Water care ▁for ▁maintenance ▁of ▁the ▁dam ▁and ▁pipeline . ▁Se ctions ▁of ▁the ▁track ▁can ▁be ▁seen ▁from ▁the ▁Wait ak ere ▁Tr am line ▁Loop ▁Track ▁which ▁follows ▁the ▁old ▁tram line ▁through ▁some ▁of ▁its ▁t unn els . ▁ ▁See ▁also ▁▁ ▁N ih ot up u ▁Tr am line ▁ ▁References ▁▁ ▁Category : R ail ▁transport ▁in ▁New ▁Zealand ▁Category : 2 ▁ft ▁gauge ▁rail ways <0x0A> </s> ▁John ▁N orton ▁is ▁an ▁American ▁poet ▁and ▁fiction ▁writer . ▁ ▁Life ▁John ▁N orton ▁graduated ▁from ▁Boston ▁College ▁and ▁the ▁University ▁of ▁Pennsylvania ▁with ▁an ▁M . A . ▁and ▁Ph . D . ▁