4 ms·
The average depth is more like 400 feet. One diagram I saw indicated 2 different layers of bedrock. I didn't find anything real clear, but it can be that the l
by maxerickson 10mo ago
The average depth is more like 400 feet.
One diagram I saw indicated 2 different layers of bedrock. I didn't find anything real clear, but it can be that the lower layer is a more suitable material for the tunnel.
- woodruffw 10mo agoYeah, that's certainly possible for Brooklyn and Queens. Manhattan and The Bronx have very shallow bedrock, but Brooklyn and Queens have lots of clay, sand, and silt.