Working cost effectively

We’re extending the safety and working life of wooden poles across our North Island electricity network by using a new reinforcing technique.

During 2020-21, about 600 wooden poles were reinforced in the Wairarapa region using the technique, with another 150 in Taranaki.

It follows a pole reinforcement trial in Whanganui in early 2020, in partnership with Logsys, where 200 wooden poles were strengthened with strappings and steel trusses, applied using a pneumatic ram.

Asset Engineer poles and towers, Andrew Jarman, says of the 265,000 poles on our network, 36,000 are wooden.

“Many of those 36,000 wooden poles in use across our network are still in good condition. By extending the life of the wooden poles, we can run our network not only safely, but cost-effectively for our customers. The cost of reinforcing is between $1200-1300 per pole as opposed to $4000-7000 for a new concrete pole.”

Reinforcing poles using trusses is not new, however this technique – developed in the United States – is. In the past trusses were bolted to the pole, however drilling the bolt hole often introduced microbes, leading to internal rot and requiring replacement of the pole.

With the trial complete, our Asset Team studied the data and monitored the poles before deciding to adopt this technique to reinforce other wooden poles on our network.

It’s estimated that poles will have up to another 20 years’ service once they’ve been reinforced in this way.

Once the reinforcing is complete, a certification label is attached showing the type of truss used, the date it was installed and other engineering data.

“That information is also recorded in our GIS system, so we have all the latest data at our fingertips.”

Milestones

Construct new substation building

The first part of the South Waikato Grid Connection project is to replace the building - which doesn’t meet earthquake resilience standards - and upgrade the equipment at the Putaruru substation.

Route for new circuit between Arapuni and Putaruru confirmed

Lorem ipsum dolor sit amet, mea ei viderer probatus consequuntur, sonet vocibus lobortis has ad. Eos erant indoctum an, dictas invidunt est ex, et sea consulatu torquatos. Nostro

Planned power cut during this period

Lorem ipsum dolor sit amet, mea ei viderer probatus consequuntur, sonet vocibus lobortis has ad. Eos erant indoctum an, dictas invidunt est ex, et sea consulatu torquatos.

Construction of the circuit and new transformer at Putaruru substation

Lorem ipsum dolor sit amet, mea ei viderer probatus consequuntur, sonet vocibus lobortis has ad. Eos erant indoctum an, dictas invidunt est ex, et sea consulatu torquatos.
2020
2020
June 2020
July 2020

UPDATES

Find out the latest updates about this project

FAQ

We strive to minimise impact in the design and placement of network infrastructure and we’re still planning and consulting on the route for the new circuit. The circuit will be a mix of overhead lines – which you will see, and underground cable – which you won’t see. You’ll also see a new building at our Putaruru substation, replacing the ageing existing building there.

We can never guarantee supply 100% of the time, however, the number and length of outages you experience will be reduced.  

EVENTS

Event 1

Lorem ipsum dolor sit amet consectetur adipiscing elit dolor

Event 1

Lorem ipsum dolor sit amet consectetur adipiscing elit dolor
Click Here

Event 2

Lorem ipsum dolor sit amet consectetur adipiscing elit dolor

Event 2

Lorem ipsum dolor sit amet consectetur adipiscing elit dolor
Click Here

Event 3

Lorem ipsum dolor sit amet consectetur adipiscing elit dolor

Event 3

Lorem ipsum dolor sit amet consectetur adipiscing elit dolor
Click Here

Downloads

2020

get in touch

We like to get feedback from our customers so please share your thoughts.