I have to agree. Rebuild the ports as they are necessary to the plains food chain. Build camps and maybe small towns for the workers and leave the rest as a reminder to never build below sea level. If Al Queda did not pick up some tips here, we may just as well do the job for them. Thee or 4 sell placed charges and this could be duplicated with 12 hours. Take out a few key substations, pumps and breech the levee in 2 or 3 spots. Set the US back another 100 bill.
When NOLA was built, it wasn't that way. It subsided.