Big Spring Creek Bridge
Concrete arch bridge over Big Spring Creek on a city street in Lewistown
Open to traffic
Built ca. 1920

Cottonwood Creek Bridge
Pony truss bridge over Cottonwood Creek on CR 312
Open to traffic
Built 1912; rehabilitated 1970

Cottonwood Creek Bridge
Pony truss bridge over Cottonwood Creek on CR 318
Open to traffic
Built 1915

Judith River Bridge
Lost through truss bridge over Judith River on CR 001
No longer exists
Built ca. 1910; rehabilitated 1970; replaced 2001

Judith River Bridge
Through truss bridge over Judith River on CR 326
Open to traffic
Built 1913

Warm Springs Creek Bridge
Pony truss bridge over Warm Springs Creek on CR 005
Open to traffic
Built 1915