The "equipment" wouldn't have made much of a difference if a barge that size started moving. All you can do is keep it from reaching the breakover point. If it ever gets loose, it's gone.
Water has some amazing power, especially when you have such a large area to work on. I forget the actual numbers, but when Katrina went through New Orleans and parts of Mississippi, it took out several sections of a concrete bridge, beams and all. The water rose up and simply lifted the sections free of the supports, depositing them on the bottom of the sea. The pressure required was quite small, like 3 or 4 psi.