US Bridges

Ir 475 over Ottawa River

Good

Lucas County, Ohio · 1.17 Mi. E. of Usr 23 · Structure no. 4808010

Built
1969
56 years old, rebuilt 2006
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
176 ft
3 main spans
Daily traffic
63,957
2019 count
Owner
State
State Highway Agency

About this bridge

Ir 475 over Ottawa River is a steel continuous stringer/multi-beam or girder carrying Ir 475 over Ottawa River in Lucas County, Ohio. It was built in 1969 and reconstructed in 2006, so it is 56 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 63,957 vehicles a day, roughly 9% of them trucks, projected to reach 81,448 by 2039. The structure is 176 ft (53.6 m) long and 86 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesIr 475
CrossesOttawa River
Location1.17 Mi. E. of Usr 23
RouteInterstate 475
StateOhio
Coordinates41.6897, -83.67254
Functional classUrban Principal Arterial - Interstate

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 protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating57.1 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length176 ft (53.6 m)
Longest span67 ft (20.4 m)
Deck width86 ft (26.3 m)
Roadway width82 ft (25 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic63,957 (2019)
Projected traffic81,448 by 2039
Trucks9%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 Ir 475 over Ottawa River built?

It was built in 1969, making it 56 years old in 2025. It was reconstructed in 2006.

What condition is Ir 475 over Ottawa 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 October 2024.

How much traffic does Ir 475 over Ottawa River carry?

About 63,957 vehicles per day (2019 count), of which roughly 9% are trucks.

How long is Ir 475 over Ottawa River?

The structure is 176 ft (53.6 m) long with a longest span of 67 ft (20.4 m) and a deck 86 ft wide.

Who owns Ir 475 over Ottawa River?

It is owned by the State Highway Agency.