3 ms·

Two things I wanted to know but couldn't find in the article (I thought they would be important): 1. How many metres down are they digging? 2. How many metres l

Two things I wanted to know but couldn't find in the article (I thought they would be important): 1. How many metres down are they digging? 2. How many metres long will the tunnel be when it's complete?

m_for_monkey 14y ago
Depth: 15-30 m Length: 13.7 km https://en.wikipedia.org/wiki/Second_Avenue_Subway https://en.wikipedia.org/wiki/Second_Avenue_Subway