I took these shots on a turist trip at Boyne Falls, Mi in August. There is a disconnected siding by the station. The frog has been removed from the rails and it seems to be unbolted. Good view of how a frog is assembled. The derail's switch stand is unbolted from the ties, so the derail is slightly out of position. The railway is Great Lakes Central, recently Tuscola & Saginaw Bay, originally Pennsy.