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TeamMisha t1_j9wibq0 wrote

I can't find the detailed study (if it was done or just a prelim conceptual review) but it looks like they proposed 350-500 feet tunnel depth which maybe would clear the subway tunnels. I imagine they couldn't ignore these conflicts so maybe that was what led to this depth.

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gh234ip t1_j9wtpqs wrote

That's 35 - 50 floors below the ground, and you'd also need to add ventilation shafts, and emergency exits.

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TeamMisha t1_j9wuprk wrote

Article mentions emergency egress shafts, yes, says they would need 4k sq ft for it.

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