Photo Gallery

Select the Photo Album to view photos or slideshow. Select a picture to view full size or to give it a "Thumbs Up" to vote for a spot in the "People's Choice" spotlight.

Market Street Drainage Project

◄ Back To All Albums ◄ Back To Thumbnails View slideshow of other photos in this album
Thumbs up Workers Operate the Tunnel Boring Machine

Workers Operate the Tunnel Boring Machine

Workers operate the tunnel boring machine (TBM) 140 ft below Market Street. The TBM digs through the face of the marl and conveys the material to the back of the machine onto railroad cars while workers install the metal ribs and wooden lagging.


Photo Credit: Cameron Pollard

View Full Size