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A comment on The Boring Company FAQ. Parent comment

Re:The Boring Company FAQ by tomjakubowski on Wednesday May 17, 2017 @02:03AM (#14356012)
I don't know where this "$1B/mile" just for tunneling figure comes from. That's certainly not the tunneling cost for any current subway extension project in Los Angeles: all-in (i.e. not only tunneling) estimates for the first phase of the Purple Line extension are at $2.8B for 3.9 miles of heavy rail subway; the full Purple Line Extension is estimated at $6.3B for 9 miles of heavy rail subway.

The closest thing is the Regional Connector project, which will be 1.9 miles of light rail and has a budget of $1.8B. But that's the entire project budget. Tunneling costs are only part of it; it's hard to find a finely grained budget, but total construction (including four new underground stations) is budgeted at $1.2B here [1], which is still "just" $600M/mile.

[1]: https://mtadash.mlmprojectservices.com/projects/5773#/cost

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Re:The Boring Company FAQ by kuschku on Wednesday May 17, 2017 @03:41AM (#14356384)
In one of the subway projects in Hamburg, a cost of 1.1 billion EUR per kilometre was reached.

But that project was building a subway including station directly below a riverbed.

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Re:The Boring Company FAQ by Piskvorrr on Thursday May 18, 2017 @08:19AM (#14366586)
Well, that's some adverse conditions - a silt riverbed behaves quite like water, so you're actually building a submerged part of the city. Look at London's early tunnels and their cost overruns (and the maintenance due to leaks).
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