I had a friend who was in management at the Port of NO. At the time it mainly moved metal. Your port is not even in the top 10 in world rankings.
http://geography.about.com/cs/transportation/a/aa061603.htm
You might want to check out your own links before posting, sometimes they can belie your own statement: "Your port is not even in the top 10 in world rankings."
New Orleans, according to the link you posted, is #3 in the World in volume. If you want to use some other link to support your statement please try again. I'll be waiting.