BN - Big Pipestone Creek Trestle[Map] Abandoned deck plate girder bridge over Big Pipestone Creek on Northern Pacific Railroad Homestake Pass "Out Of Service" Built 1901-2
BN - Spire Rock Trestle[Map] Abandoned deck plate girder bridge over Halfway Creek on Northern Pacific Railroad Homestake Pass "Out Of Service" Built 1901-2
Boulder River Bridge[Map] Lost through truss bridge over Boulder River on CR 304 No longer exists Built 1899; replaced 2001
Boulder River Bridge[Map · Street View] Warren pony truss with all verticals bridge over Boulder River on Old Highway 2 Open to dead end traffic
CR410 Williams Bridge[Map] Pratt through truss bridge over Jefferson River on CR 410 Open to traffic Built 1898; rehabilitated 1980
Frontage Road 099 Bridge[Map] Concrete tee beam bridge over Cataract Creek 030 on Frontage Road 099 Open to traffic Built 1933
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
Jefferson River Bridge[Map] Pratt through truss bridge over Jefferson River on CR 170 Open to traffic Built 1914
Jefferson River Bridge[Map] Lost two-span through truss bridge over Jefferson River on US 287 No longer exists Built ca. 1930; replaced 2001
MILW - Fish Creek Trestle[Map] Lost Deck plate girder bridge over Fish Creek Canyon on Chicago, Milwaukee, St. Paul & Pacific Railroad Removed, reportedly by a rancher
MRL - Jefferson River Bridge[Map] Pratt Through truss bridge over Jefferson River on Montana RailLink Intact but closed to all traffic Relocated here 1949
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.