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stewartm0205 t1_iy9stau wrote

Same way the 2nd Ave subway was built, you cut a tunnel and build a station. It would cost about the same per mile.

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Wowzlul t1_iy9vzcm wrote

Things are pretty busy down there already. You'd need to tunnel quite deep, right? And I'm not sure that's as simple in Lower Manhattan as it was for SAS Phase 1 which was mostly solid rock. I know they're already worried about working in soft soil for SAS Phase 3/4. Lot of additional concerns about water intrusion, for one.

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