Big Dig update – From the Boston Globe “Designer proposed more bolts in Big Dig”: “Big Dig managers were so confident of the strength of the bolts that would hold up the heavy, concrete ceiling in the Interstate 90 connector tunnel that they successfully pressured the ceiling's designer to cut in half the number of bolts suspending each ceiling hanger, according to a 1998 memo obtained by the Globe.”

Using half as many bolts kept the project from going over budget.