Have an old steel framed bike that I acquired as a project. The chainstay bridge has a hole for the rear fender, but the top part of the bridge is torn out above the hole. The bridge is intact below the hole. In other words, imagine someone took the lower (front edge) fender screw and tore it out by pulling up. As I said, the bridge below the hole is intact. The upper seat stay bridge is fine. Is this something that is a structural or is it a cosmetic issue?