US Bridges

SR 15 over Tiffin River

Good

Defiance County, Ohio · 0.50 Mi. North of USR24. · Structure no. 2000482

Built
1965
60 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
225 ft
3 main spans
Daily traffic
9,291
2015 count
Owner
State
State Highway Agency

About this bridge

SR 15 over Tiffin River is a steel continuous stringer/multi-beam or girder carrying SR 15 over Tiffin River in Defiance County, Ohio. It was built in 1965, so it is 60 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 9,291 vehicles a day, roughly 6% of them trucks, projected to reach 12,896 by 2035. The structure is 225 ft (68.6 m) long and 36 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

Location

Open in Google Maps
CarriesSR 15
CrossesTiffin River
Location0.50 Mi. North of USR24.
RouteState Highway 15
CountyDefiance County
StateOhio
Coordinates41.30667, -84.38425
Functional classUrban Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.6 US tons
Inventory rating29.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length225 ft (68.6 m)
Longest span86 ft (26.1 m)
Deck width36 ft (11 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,291 (2015)
Projected traffic12,896 by 2035
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.7 mi (35 km)
TollOn a free road
National Highway SystemNo

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 15 over Tiffin River built?

It was built in 1965, making it 60 years old in 2025.

What condition is SR 15 over Tiffin 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 August 2024.

How much traffic does SR 15 over Tiffin River carry?

About 9,291 vehicles per day (2015 count), of which roughly 6% are trucks.

How long is SR 15 over Tiffin River?

The structure is 225 ft (68.6 m) long with a longest span of 86 ft (26.1 m) and a deck 36 ft wide.

Who owns SR 15 over Tiffin River?

It is owned by the State Highway Agency.