Branch Neosho River Bridge
Concrete arch bridge over a branch of Neosho River, 3.8 mi. west and 2.2 mi. south of Iola
Open to traffic
Built ca. 1930

Branch Neosho River Bridge
Stone arch bridge over a branch of Neosho River, 0.8 mi. north of Humboldt
Open to traffic
Built ca. 1910; rehabilitated 1950

Coal Creek Bridge
Lost arch bridge over Coal Creek
No longer exists
Built ca. 1950; replaced 2001

Elm Creek Bridge
Concrete arch bridge over Elm Creek on Old US 169 Business Route
Closed to all traffic
Built 1908

Humboldt Bridge
Two-span Marsh arch bridge over Neosho River on Bridge Street in Humboldt
Open to traffic
Built 1932

Indian Creek Bridge
Pony truss bridge over Indian Creek, 1.0 mi. west and 0.5 mi. south of Geneva
Open to traffic
Built 1924

Indian Creek Bridge
Through truss bridge over Indian Creek, 1.3 mi. south and 0.5 mi. west of Geneva
Closed to all traffic
Built ca. 1910

Iola Bridge
Lost three-span Marsh arch bridge over Neosho River on US 54 at Iola
Replaced by a new bridge
Replaced 1996

Jeff Avenue Bridge
Concrete arch bridge over Coon Creek on Jeff Avenue in Iola
Open to traffic

Local Road 19.0-D.5 Bridge
Concrete arch bridge over an unnamed creek, 2.5 mi. south and 1.0 mi. west of Mildred
Open to traffic
Built ca. 1930

Local Road 3.0-T.2 Bridge
Concrete arch bridge over an unnamed creek, 0.8 mi. north and 1.0 mi. west of Petrolia
Open to traffic
Built ca. 1930

Martin Creek Bridge
Pony truss bridge over Martin Creek, 0.6 mi. south and 1.5 mi. west of Geneva
Open to traffic
Built ca. 1910

Middle Creek Bridge
Concrete arch bridge over Middle Creek, 0.2 mi. north and 1.5 mi. east of Mildred
Open to traffic
Built ca. 1930

North Street Bridge
Concrete arch bridge over Coon Creek on North Street in Iola
Closed to all traffic

Owl Creek Bridge
Pony truss bridge over Owl Creek, 3.4 mi. west of Humboldt
Open to traffic
Built 1909

Schleichers Branch Bridge
Lost stone arch bridge over an unnamed creek on Schleichers Branch
No longer exists
Built 1898 by Gottlieb Roehl; replaced 1999

Unnamed Creek Bridge
Stone arch bridge over an unnamed creek, 3.4 mi. east and 1.0 mi. south of Elsmore
Open to traffic
Built ca. 1920