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