[gogeo]

"The Big Dig was much shallower; therefore, the whole city was ripped up. They call that kind of construction cut and cover,” he explains . . .

I'm impressed. Part of the "Big Dig" goes under Boston Harbor. How did they manage to do cut and cover there?

[Tolerance Sucks Rocks]

They used one of those large round visitor ships from the V series to suck all the water out of the harbor so they could then cut and cover.