That's one heck of a great shot Shamus, and to think that Cooncreek Tunnel is a mile long too, wow!  I mean, I know that even though your Irish you wouldn't be pulling or leg now, would ya?  LoL
I like the work you did and fore thought about the bank leading into the tunnel and the way you have is braced and how the hill side is extending beyond the retaining walls a bit beyond them.  Really a great bit of modeling! 
