Boulder River Bridge Pony truss bridge over Boulder River on CR 102 Open to traffic Built 1931; rehabilitated 1991
Boulder River Bridge Pony truss bridge over Boulder River on CR 102 Open to traffic Built 1931; rehabilitated 1991
Boulder River Bridge Pony truss bridge over Boulder River on CR 103 in Big Timber Open to traffic Built 1940
Boulder River CR 116 Bridge Lost pony truss bridge over Boulder River on CR 116 No longer exists Built ca. 1930; replaced 2002
Greycliff Bridge Lost two-span through truss bridge over Yellowstone River on CR 001 Replaced by new bridge Built 1911 by the Security Bridge Co.; relocated here 1918; replaced 1991
Sweetgrass Creek Bridge Through truss bridge over Sweetgrass Creek on CR 007 Open to traffic Built 1910
Sweetgrass Creek Bridge Pony truss bridge over Sweetgrass Creek on CR 014 Open to traffic Built 1910; rehabilitated 1964
Voges Bridge Lost through truss bridge over Yellowstone River on CR 028 No longer exists Built 1914 by the Security Bridge Co.; replaced 2000
West Boulder River Bridge Pony truss bridge over West Boulder River on CR 143 Open to traffic Built 1912