Aichholz Ditch Bridge
Pony truss bridge over Aichholz Ditch on CR 23
Open to traffic
Built ca. 1940; rehabilitated 1978

Branch Wolf Creek TR 112 Bridge
Pony truss bridge over a branch of Wolf Creek on TR 112
Open to traffic
Built 1925 by the Ohio Bridge Corp.; rehabilitated 1987

East Branch Wolf Creek TR 109 Bridge
Through truss bridge over East Branch Wolf Creek on TR 109
Open to traffic
Built 1915 by the Ohio Bridge Corp.; rehabilitated 1987

Ella Street Bridge
Closed-spandrel arch bridge over Sandusky River on Ella Street in Tiffin
Open to traffic
Built 1914; rehabilitated 1979

Gailbraith Ditch TR 98 Bridge
Closed-spandrel arch bridge over Gailbraith Ditch on TR 98
Open to traffic
Built 1928

Good Ditch TR 132 Bridge
Closed-spandrel arch bridge over Good Ditch on TR 132
Open to traffic
Built 1928

Honey Creek Bridge
Through truss bridge over Honey Creek on CR 16
Unknown status

Honey Creek CR 6 Bridge
Closed-spandrel arch bridge over Honey Creek on CR 6
Open to traffic
Built 1915; rehabilitated 1974

Honey Creek TR 58 Bridge
Through truss bridge over Honey Creek on TR 58
Open to traffic
Built 1890; rehabilitated 1984

Honey Creek TR 58 Bridge
Truss bridge over Honey Creek on TR 58
Open to traffic
Built 1911; rehabilitated 1944

Honey Creek TR 88 Bridge
Closed-spandrel arch bridge over Honey Creek on TR 88
Open to traffic
Built 1915

Huss Street Bridge
Closed-spandrel arch bridge over Willow Creek on Huss Street in Tiffin
Open to traffic
Built 1914

Huss Street Bridge
Closed-spandrel arch bridge over Willow Creek on Huss Street in Tiffin
Open to traffic
Built 1914

Indian Creek TR 75 Bridge
Closed-spandrel arch bridge over Indian Creek on TR 75
Open to traffic
Built 1950

Riverside Street Bridge
Closed-spandrel arch bridge over Rock Creek on Riverside Street in Tiffin
Open to traffic
Built 1929

Rock Creek CR 36 Bridge
Truss bridge over Rock Creek on CR 36
Open to traffic
Built 1903; rehabilitated 1973

Rock Creek OH 18 Bridge
Closed-spandrel arch bridge over Rock Creek on OH 18 (Market Street) in Tiffin
Open to traffic
Built 1929

Rock Creek OH 19 Bridge
Closed-spandrel arch bridge over Rock Creek on OH 19 in Republic
Open to traffic
Built 1916

Rock Creek TR 165 Bridge
Pony truss bridge over Rock Creek on TR 165
Open to traffic
Built 1919; rehabilitated 1983

Sandusky River Bridge
Through truss bridge over Sandusky River on CR 51
Unknown status
Built 1924; rehabilitated 1983

Sandusky River Bridge
Lost through truss bridge over Sandusky River on CR 33
Replaced by a new bridge
Built 1897; rehabilitated 1986; damaged and removed 1996

Sandusky River Bridge
Through truss bridge over Sandusky River on TR 143
Open to traffic
Built 1914; rehabilitated 1984

Seneca County Road 52 Bridge
Concrete arch bridge on CR 52
Open to traffic
Built 1928

Township Road 185 Bridge
Concrete arch bridge on TR 185
Open to traffic
Built 1926

TR 73 Bridge
Rainbow arch bridge on TR 73
Open to traffic
Built 1928

Wolf Creek CR 60 Bridge
Closed-spandrel arch bridge over Wolf Creek on CR 60
Open to traffic
Built 1938

Wolf Creek TR 116 Bridge
Pony truss bridge over Wolf Creek on TR 116
Open to traffic
Built 1928; rehabilitated 1984

Wolf Creek TR 47 Bridge
Pony truss bridge over Wolf Creek on TR 47
Open to traffic
Built 1940 by the Ohio Bridge Corp.; rehabilitated 1986