We're starting to turn our focus to the Johnsonville Line where we'll be:
These works are expected to continue until 2022.
We’re upgrading the overhead electrical systems between Ngaio and Johnsonville. To do this we are replacing the old wooden overhead masts with steel poles.
The systems were first installed in 1938 and while they have been well maintained they are well overdue for an upgrade. Since 2007 we have been progressively replacing the system as it reaches the end of its useful life.
The modern, traction system will mean more reliable train services and provide a platform for increased services. It will also require reduced maintenance and make our rail network more resilient to future seismic activity.
The new infrastructure will be installed in different places and look a little different.
The replacement happens in three stages:
Once the new system is up and running we’ll remove the wooden masts.
We’re doing a full sleeper replacement in all seven tunnels along the line. This work can only be done when no trains are running.
We’re also reinforcing the steep slopes that line the approach to the tunnel in the Ngaio Gorge. This will be done by drilling into the banks and installing steel pins to anchor safety netting into place to reduce the chance of slips. To do this work the team will abseil down from the top of the embankments.
Tunnels access can be tricky when trains are running 18 hours a day.
If you have any queries or concerns about our activity please contact us on: