I live in an area with a lot of covered bridges, I don't believe any of ours are railroad bridges......that's a cool one!
We have a big covered bridge festival every fall. The problem around here are arsonists. One of the nearby bridges was burned a few years ago. The area landowners donated standing trees to build a new one. I would take my Mom and Sis once a week, with lunch, sit in the car and watch the new one being built, all donated helpers. I can't imagine anyone wanting to burn down something like that. They caught the guy............he was at the next one starting a fire under it. :'( Thank goodness they got there soon enough to save it, he had just got out of prison for burning down an apartment house. Another one in the area was burned, but it was on a road less traveled and they never rebuilt it.
A couple years ago my brother and his wife (newly retired) started a project of finding all the bridges to photograph and write up a little history on. I couldn't believe how many there were.
Please keep us informed of the progress.