Quote:
Originally Posted by Hali87
How much more would it cost to tunnel in Halifax compared to other cities? Would it be the most expensive tunnel per km in North America? The world? Does anyone actually know, for a fact, that it would be prohibitively expensive, or is this just an assumption that we (constantly) throw around?
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Under the harbour is hard, acidic slate. Tunnelling through the rock would be difficult enough, but it also requires additional disposal considerations.
https://www.halifax.ca/boardscom/swrac/d...ortPyriticSlateProcessforHRMProperty.pdf
In short, its much more expensive to dig here than other cities.
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