Great Porcupine Creek Bridge
Pony truss bridge over Great Porcupine Creek on CR 103
Open to traffic
Built 1912

Musselshell River Bridge
Pony truss bridge over Musselshell River on CR 118
Open to traffic
Built 1930

Rosebud Creek Bridge
Lost truss bridge over Rosebud Creek on MT 446
No longer exists
Built 1930; replaced 2005