The Big Dig of Boston On my way to photograph the Big Dig with my trusty Nikon. Biggest Public Project in the World at the time. The Central Artery Tunnel. Circa 1995. Cannot imagine how many Structural Engineers were involved! You can see here where the old steel structure meets the new. Existing structures supported by new steel. Jimmy’s Harborside in the thick of it. I tried to photograph it so it looked like the stairs were going up the building!