GN - Boulder Tunnel[Map] Tunnel under Hill on Abandoned Burlington Northern Railroad Intact but closed to all traffic Built 1888; Abandoned 1982
GN - Corbin Trestle[Map] Abandoned Deck plate girder trestle over Corbin Road/Trestle Lane on Great Northern Railway Derelict/abandoned Built 1902
GN - Tunnel #7[Map · Street View] Abandoned tunnel under Mountain on Abandoned Burlington Northern Railroad Derelict/abandoned Built 1912, Abandoned 1982
GN - Tunnel #9[Map] Tunnel under Mountain on Boulder River Road Open to traffic Built 1911; Abandoned 1972 and reused as a road
GNR - Boulder River Bridge[Map · Street View] Abandoned bridge over Boulder River on abandoned Great Northern Railway Derelict/abandoned Nearby tunnel was built 1912, 1950 map shows this as the Great Northern Railway
Old Sappington Bridge Span at Rockin' the River[Map · Street View] Polygonal Warren through truss bridge Bridge according to 2000 NBI used to carry US 287 over the Jefferson River until the new bridge replaced it in 2001. Perhaps it was relocated to its current location to be used in the future for some other purpose.
US287 Jefferson River Bridge (Old)[Map] Relocated Polygonal Warren through truss bridge over Jefferson River on US 287 Replaced by a new bridge Built 1930; spans later relocated to different locations for reuse.