[rodguy911]

wow cant tell you how many tiems ive been across that stretch never dreamed it would get knocked out:

[jeffers]

That is expected causeway damage. When the water rises and waves cover large areas, momentum plus incompressibility, as the surface smacks the bottom of the slab, snap the mounts right off and lift the slab.

Katrina did this to more than one causeway. Those were back in operation pretty quick.