I suggest you find the historical work that was done on Fort Jackson, which to my knoeledge, was left abandoned after Hurricane Katrina in 2005. I had visited the fort. It was a marvel of construction, and all the artifacts to include bolts fired from federal ships.
had occasion to visit Fort Jackson in the mid 80s, while stationed in New Orleans. It was interesting. Must have been one hell of a fight for those ships to sail past it.