At the rear of this fort at the two prongs of the horseshoe were located, the walls were eighteen inches thick at the top and were loopholed for riflemen to fire their rifles through. Connecting the two prongs and enclosing the fortification's rear was a two-story barracks roughly 82 feet long and 30 feet wide. Each story contained five 13×16-foot rooms, three laid out for enlisted men and two for the fort's officers. The barracks could accommodate a single company consisting of fifty men. Beside the barracks on the right-hand prong was a small 15×16-foot brick building for a gunpowder magazine. From rear wall to front the fort was 90 feet long, 123 feet wide and had a perimeter of about 440 feet.
