OK think back when they dredged for the new dock for the reactors, did they not put that rock and dirt where Plaza Los Glorious sits today? Rock tends to interlock when it is placed on top of each other to form a solid base. They are putting larger rocks on the out side of the main base for Tide surge I think they will get away with it. We have all seen the way they build roads! ( New road to RP what 10 years old now) still holding up fine to my surprise