City Rail Link
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Boring Day Out

Boring Day Out

TBM’s Milestones


September 2022 - TBM’s final breakthrough at Te Waihorotiu station

April 2022 - TBM sets off to build the second tunnel


December 2021- Breakthrough at Te Waihorotiu Station


October 2021 - Breakthrough at the Karanga-a-Hape Station


May 2021- TBM turned on for the first time

The Tunnel Boring Machine was turned on for the first time at the Link Alliance's Maungawhau/Mount Eden Station site by then Transport Minister Michael Wood and then Auckland Mayor Phil Goff pressing the start button in May 2021.


December 2020 - Boring Day Out Public Event

In December 2020, we were pleased to be able to give 5000 Aucklanders a close-up view of our Tunnel Boring Machine.

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December 2020 - Blessing of the TBM

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Our Tunnel Boring Machine (TBM) was blessed by Dame Whina Cooper’s daughter, Hinerangi Puru Cooper, and her wider whanau at the Maungawhau Station (Mt Eden) construction site on 4 December 2020.

CRL CEO Dr Sean Sweeney said: “Dame Whina’s legacy is one of determination and the importance of working together, values that fittingly apply to this project and our journey ahead to build a world class railway for Auckland.

Hinerangi said she was honoured and humbled to be present at the unveiling of the TBM today.

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February 2020 - Sod-turning ceremony at Maungawhau Station

DigCRL: CRL Ltd CE Dr Sean Sweeney, then Auckland Mayor Phil Goff and then Minister of Transport Phil Twyford

On 13 February 2020, spades in the ground at the sod-turning ceremony cleared the way for work to start on driving 66 concrete piles between 38 metres and eight metres long into the ground to support the curved-shaped retaining wall 127 metres long and 25 metres high.

The portal took 10 months to build. When completed, it became the launching pad for the TBM.