But isn't the land valuable (or potentially valuable) and won't its loss be irrecoverable?
Of course they are allowing commercial developments to continue, check this out:
Louisiana – Other Oil & Gas Infrastructure: http://www.dnr.louisiana.gov/assets/images/oilgas/refineries...
Louisiana – pipelines and platforms: http://www.dnr.louisiana.gov/assets/images/oilgas/refineries...