The Robbins company has uploaded on Flickr some great photos of rock tunneling. Beautiful. It shows tunnels bored by Robbins TBM.

But unfortunately they have disabled downloading. So I can not upload them here at tunnelcontact.com

You must see these great photos at breathtaking rock formations

https://www.flickr.com/photos/71218100@N04/albums/72157710888912647/with/48751418971/