Comment by sambroner

I don't know much about tunneling speeds, but this seems much faster than Big Bertha in Seattle although for a much smaller volume (the tunnel is narrower) and (I'm assuming) less complex location.

Big Bertha - 3.5 years, ~1.75 miles, 1.5 m/yr

Boring - .15 years, .35 miles, 2.33 m/yr