Pea Patch Island/Fort Delaware

Alright, I'm straying way out of the pines here (and out of the state), but if any place has an answer, it'd be this one.

After over a decade of saying, "Hey! I should totally do that!", I finally went to Pea Patch Island/Fort Delaware this weekend. For those who aren't familiar with it, Fort Delaware (located in the middle of the Delaware River, below the Delaware Memorial Bridge) was part of a three fort system (along with Fort Mott in New Jersey and Fort Dupont in Delaware) to prevent our enemies from coming up the Delaware to attack Philadelphia. It's claim to fame is that it was used as a prisoner of war camp during the Civil War.

My question is... what the heck is going on with the south side of the fort? The outside looks immaculate, but the south wall has what appears to be a pillbox built on top of it. That whole wall is really anachronistic, it looks a lot like the later designs at Fort Mott or the defenses at Sandy Hook. I know the fort was occupied until after WWII.

Outside looks the same all around:
peapatch05.jpg


Civil War part of inside of the fort:
peapatch02.jpg


The other side:
peapatch04.jpg


Another angle. Can see the pillbox just before it changes styles from poured concrete to brick.
peapatch03.jpg


Gun placements outside of the walls:
peapatch01.jpg
 
Very nice report and photos, Mike!

Since Fort Delaware, like Fort DuPont and Fort Mott, protected the cities upriver from approaching enemy, the pillbox structure you see on top of the south wall was likely the fire control station, where personnel would spot enemy vessels approaching from Delaware Bay and artillery and ordnance officers would calculate both the proper angle for the cannon or gun and the power of the shell to be loaded based on the size of the approaching vessel.

Best regards,
Jerseyman
 
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