Hello,
I don't know if it is the same fort, but there was a serious fort in Athens on Coleman Hill just west of S. Jefferson St.. There was also a RR "Block-house" just west of the tracks along S. Jefferson St., between the street and the tracks, near where the little creek goes under the RR tracks/trestle. . Anyway, they built a small school right on top of the fort back in the '40s or '50s. The school is unused and abandoned now. There is still one of the corner bastians left of the fort still visible, moat and all. If you go to Athens, turn up Jefferson Street off of Hwy 72 and head towards downtown. Take a left on one of the streets right before you get to the downtown square area, and go up in that neighbor hood. Someone can direct you to Coleman Hill, and the old Coleman School. Anyway, during Gen. Forrest's 1864 N. Alabama Campaign, he attacked Athens with about 4500 men. They took Athens, after fighting up and down the tracks, all through town, etc.. Forrests men took the fort and destroyed 6 RR "Block-Houses" between Athens and the Tennessee River. Forrest then headed north up the tracks, and they had another big fight at "Sulpher Creek Trestle", right below Elkmont a little ways. That yankee fort is still there, with a big fine house built right slap in the middle of it, with the fort walls or burms all around it. It is sort of neat in a way. At least the owners chose not to destroy the walls of the fort. Go to Elkmont. There is a three mile stretch of the old RR bed that has been made into a nice walking, jogging, bycycle, and horsback trail. In the vicinity of Sulpher Creek Trestle there are nice markers telling of the battle with pictures, maps, etc..
After Sulpher Creek Trestle Forrest went on as far as Pulaski, taking it I think. I hope this little bit of info is of some help.
Take care,
Dave