Google Earth has a time function, and you can go back and find images from the past. A while back I was able to get images of the area I was working on from the 1980s. Trying it again tonight though, it would not go back past 1998 in the same area and all I got was a basic fog. No good images at all. But you can try it... Even it if it is just far enough back to see the rail beds...