KiwiRail’s new Waltham Maintenance Hub
Photos by Chris Gunn
KiwiRail’s new Christchurch maintenance hub at the Waltham yard is steeped in New Zealand’s rail history. The very first steam railway line opened 160 years ago in 1863, running from Ferrymead to Moorhouse Ave, adjacent to the new facility.
It is now home to the main South Island locomotive, passenger carriage and wagon maintenance facility. Minister for Rail Rt Hon Winston Peters officially opened the new Waltham Maintenance Hub, following a $110 million Government investment, and the first of the new, low emission and more powerful DM locomotives, being built by Stadler in Spain, were also on display.
The Government has invested $533m for 66 DM locomotives, 47 ($372m) of which will replace the aging South Island locomotive fleet.
KiwiRail Chief Executive Peter Reidy says the hub will provide a modern, safe environment for staff to work on 24 different assets at the same time, complete with electronic safety systems to protect staff from any unplanned rail movements and is supported by enough solar panels to meet half of the site’s electricity needs.
“Thanks to further significant Government support, we have ordered the new DM locomotives. Four have entered service in New Zealand now, with the rest to arrive in batches over the next two years,” Mr Reidy says.
“The Waltham hub and the DMs are a game changer for KiwiRail’s South Island operations. Waltham ensures our maintenance crews have the capability to move to the preventative asset management approach needed to deliver consistent reliability of service for our customers.
“More efficient maintenance, combined with more reliable locomotives will mean better and more timely services for our South Island customers. It is the crucial foundation that will allow us to get more of the island’s freight onto rail.”
The hub and DM locomotives are part of a $1.2 billion dollar Government investment in South Island rail since 2019.
The building will stand for over 50 years so further consideration has been given to enable the maintenance of the next generation of locomotive, whether they be powered by hydrogen or batteries, or something else.
Alan Hill, General Manager Future State RSAS at KiwiRail, says the building has the ability to flex and adapt to maintenance needs beyond 2050.
Some other key features of the construction and the site include:
- 450 different companies.
- 489 piles have been bored 25m deep each, totalling 12¼ kilometres of piling.
- 9,866 cubic meters of concrete has been placed that about 1300 concrete trucks.
- The volume of concrete poured in the project could fill up four Olympic-sized swimming pools.
- 1,141 tonnes of reinforcing steel.
- 475 tonnes of structural steel.
- 1 kilometre of track within the building.
- 5 kilometre of compressed air piping.
- Roof height 15 metres at apex, to allow a 25- tonne gantry crane with a hook height of 10 metres.
- 9400m2 (90 x 97m) total floor area.
Footnote: On 5 March 2026, CILT’s Southern Section enjoyed a site visit to the new facility and were kindly hosted by Doug Medlycott, Transition Leader, Future State, RSAS. His comprehensive knowledge of all aspects of the technology employed in this ultra-modern maintenance hub made for a very enjoyable visit. Notable in his comments was the fact that, in the previous four months, KiwiRail achieved a zero-rate of workplace accidents, and this bodes well for all staff working in such a heavy engineering facility.