US Bridges

SR 18 over Trib of Vermilion River

Fair

Huron County, Ohio · 4.60 Miles East of SR601 · Structure no. 3900304

Built
1943
82 years old
Condition
Fair
inspected March 2024
Type
Slab
Concrete
Length
25 ft
1 main span
Daily traffic
2,938
2015 count
Owner
State
State Highway Agency

About this bridge

SR 18 over Trib of Vermilion River is a concrete slab carrying SR 18 over Trib of Vermilion River in Huron County, Ohio. It was built in 1943, so it is 82 years old, older than the Ohio average of 47.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 2,938 vehicles a day, roughly 20% of them trucks, projected to reach 4,078 by 2035. The structure is 25 ft (7.6 m) long and 44 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesSR 18
CrossesTrib of Vermilion River
Location4.60 Miles East of SR601
RouteState Highway 18
CountyHuron County
StateOhio
Coordinates41.20408, -82.46223
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.1 US tons
Inventory rating32.2 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 15
Structure length25 ft (7.6 m)
Longest span22 ft (6.7 m)
Deck width44 ft (13.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,938 (2015)
Projected traffic4,078 by 2035
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 SR 18 over Trib of Vermilion River built?

It was built in 1943, making it 82 years old in 2025.

What condition is SR 18 over Trib of Vermilion River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2024.

How much traffic does SR 18 over Trib of Vermilion River carry?

About 2,938 vehicles per day (2015 count), of which roughly 20% are trucks.

How long is SR 18 over Trib of Vermilion River?

The structure is 25 ft (7.6 m) long with a longest span of 22 ft (6.7 m) and a deck 44 ft wide.

Who owns SR 18 over Trib of Vermilion River?

It is owned by the State Highway Agency.