Again ........ ohhh so close. Keep looking. With that said, there always is a possibility there may be more but the one in question sticks right out so the next post should be a winner.
I don't think so Bob. The bridge over the Batsto doesn't' have double rails like the one in Guy's picture.
The other one nearby doesn't' have them either. That's what has me stumped.
Only other big concrete ruins I've seen are at Estell Manor.
... or are there such ruins at Amatol? We've only explored the old board track area there.....