Important base installations such as the power station , dry dock , shipyard , maintenance , and fuel and torpedo storage facilities , as well as the submarine piers and headquarters building Building ( also home of the intelligence section ) were not attacked Attack .

The bridge—designed by Sir Thomas Bouch—used lattice girders supported Supporting by iron piers , with cast Motion iron columns and wrought iron cross-bracing .

The piers were narrower and their cross-bracing was less extensive and robust than on previous similar designs Create_artwork by Bouch .