US Bridges

TH121B over Sandusky River

Good

Wyandot County, Ohio · 0.20 Miles N of TH51A · Structure no. 8845581

Built
1967
58 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
226 ft
3 main spans
Daily traffic
156
2015 count
Owner
County
County Highway Agency

About this bridge

TH121B over Sandusky River is a steel continuous stringer/multi-beam or girder carrying TH121B over Sandusky River in Wyandot County, Ohio. It was built in 1967, so it is 58 years old, older than the Ohio average of 47.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 156 vehicles a day, roughly 8% of them trucks, projected to reach 217 by 2035. The structure is 226 ft (68.9 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesTH121B
CrossesSandusky River
Location0.20 Miles N of TH51A
RouteCounty Highway T0121
StateOhio
Coordinates40.8504, -83.2561
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.5 US tons
Inventory rating44.3 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length226 ft (68.9 m)
Longest span85 ft (25.9 m)
Deck width32 ft (9.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic156 (2015)
Projected traffic217 by 2035
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was TH121B over Sandusky River built?

It was built in 1967, making it 58 years old in 2025.

What condition is TH121B over Sandusky River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2024.

How much traffic does TH121B over Sandusky River carry?

About 156 vehicles per day (2015 count), of which roughly 8% are trucks.

How long is TH121B over Sandusky River?

The structure is 226 ft (68.9 m) long with a longest span of 85 ft (25.9 m) and a deck 32 ft wide.

Who owns TH121B over Sandusky River?

It is owned by the County Highway Agency.