Local NewsPhoto & VideoTraffic Lab Tunnel machine breaks through in the U District Originally published March 24, 2016 at 6:37 pmUpdated March 28, 2016 at 4:56 pm Working on the next extension of light rail in the Seattle area, tunnel boring machine TBM No. 2 broke through to the University District Station site on Thursday. Share story By Ellen M. Banner Seattle Times staff photographer Ellen M. Banner