They don’t make them like that any more
You may be curious how the ancient series of Third System (and older) coastal defenses tolerated the recent Hurricane Matthew. Here is the run down.
Georgia’s Fort Pulaski got about a foot of water throughout the structure and the moat is full for the first time in a long time. Historically the dike was built to withstand close to a 12-foot storm surge, unfortunately, Fort Pulaski experienced a record 12.56 feet.
Speaking of moats, the Castillo de San Marcos (Fort Marion) in St. Augustine is full again as well. The oldest masonry fort in the continental United States, it dates back to 1672.