I was browsing google maps following the old road bed south of York and found what looks like a few bridges still standing. Map coordinates are http://goo.gl/maps/Kvst9 31°11'58.7"N 88°09'25.1"W, http://goo.gl/maps/sMUko31°20'29.9"N 88°13'28.2"W, http://goo.gl/maps/D90Nf 32°28'47.6"N 88°18'12.4"W. Also found a BN green caboose in the middle of Millry http://goo.gl/maps/1viRD
The first two bridges in your post are south of Tibbee and north of Calvert... in what I consider, "no man's land." I have attempted many times to plan a vehicle route as close as possible to the entire length of the AT&N (Reform to Mobile) several times. The area between Tibbee and Calvert has always been the most problematic, compounded by the fact that it would require travel on unfamiliar county roads in a very remote area and possible getting lost or worse... stuck on the side of a muddy dirt road. There are suitable roads from Tibbee to Fairford to Calvert but they don't follow the old ROW closely. This segment of the old line appears to be in a very marshy area so road access to the ROW appears few and far between. There is no good route to map if you ask me. Still, I aim to attempt it soon as best I can. Here is an image I found of the caboose at Millry https://www.google.com/maps/place/3...3!1s46542024!2e1!3e10!4m2!3m1!1s0x0:0x0?hl=en. I hope the link works. There is another caboose at Gilbertown lettered AT&N https://www.google.com/maps/place/3...3!1s95429859!2e1!3e10!4m2!3m1!1s0x0:0x0?hl=en