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> Manhattan is no picnic to dig a tunnel thru That's an understatement. It's solid bedrock. Great for skyscrapers. Really bad for tunnels.
by maratd 13y ago
> Manhattan is no picnic to dig a tunnel thru
That's an understatement. It's solid bedrock. Great for skyscrapers. Really bad for tunnels.
- ceejayoz 13y agoI'd imagine it has its benefits, like not having to worry so much about leaks and collapsing the buildings above into your hole.
- Mvandenbergh 13y agoIt's hard to dig the tunnels, but once you do it tends to stay dug without a lot of complicated reinforcement work.