I build tunnels for a living. Ask me anything!
I am a tunnel boring machine operator—the person who operates the actual tunneling machine. I've worked in the tunneling industry for 32 years and built 20+ tunnels around the world. Ask me anything about tunneling and boring machines. Anything about how the machines work, what we do underground, aspects of our job.
(* I am his son Zach. I will be writing my dad's answers for him from my account.)