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Publishing • Production • Communications

How possible is a North-South Island tunnel?

  • Writer: Newstalk ZB
    Newstalk ZB
  • Feb 7, 2018
  • 1 min read

Updated: Oct 6, 2020


To listen to the interview, please click on the image above.

The idea of a tunnel linking the North and South Island has got people talking.

While we know how well the channel tunnel linking Britain and France works, the idea of a tunnel between Wellington Airport and Picton would be nearly twice the length.

With the challenging conditions in the strait, is it possible?

Grant McLachlan is an environmental and infrastructure specialist and he believes it can be done.

He told Larry Williams that there are a number of options, though it will be expensive.

“A train only tunnel, 66 kilometres, that would possibly be costing about $15 billion.”

He has been thinking about the idea for around 20 years, and is excited for the prospect.

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© Grant McLachlan, 2026. Klaut is a Fortis Fidus Company.
*Grant McLachlan holds a law degree and was admitted as a barrister and solicitor of the High Court of New Zealand. He does not hold a current practising certificate and does not provide legal services or legal advice. Where columns republished on this site incorrectly refer to him as a lawyer, this reflects the original publication's wording and not a description he uses of himself. Nothing on this site constitutes legal advice.
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