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Overnight, intermittent closure of Porter River Bridge, State Highway 73, from Monday, 12 March


The NZ Transport Agency advises people who normally use State Highway 73 between Castle Hill Village and Lake Lyndon, on the main route between the West Coast and Canterbury, that the Porter River Bridge is about to have overnight deck repairs for two weeks.

Porter River Bridge

From next Monday night, 12 March, the bridge will be closed overnight for an hour at a time from 10pm to 6am. It will be opened on the hour, (for example at 11 pm, then at midnight, then 1 am) every hour to clear traffic. The exception will be emergency vehicles which will be helped across the bridge as quickly as possible.  

  • The work will be completed by 26 March, if crews get a run of dry weather. If not, the nights may be extended.
  • The Porter River bridge is about 8kms west of Lake Lyndon, between Lake Lyndon and Castle Hill Village/Cave Stream Scenic Reserve.
  • The work is to repair the bridge deck seals.
  • Electronic signs on State Highway 73 will warn drivers of the intermittent closure from Tuesday, 6 March.

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