US Bridges

NB Ir 75 over SR 123

Good

Warren County, Ohio · Over SR 123 · Structure no. 8303630

Built
1960
65 years old, rebuilt 2009
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
188 ft
4 main spans
Daily traffic
45,660
2015 count
Owner
State
State Highway Agency

About this bridge

NB Ir 75 over SR 123 is a steel continuous stringer/multi-beam or girder carrying NB Ir 75 over SR 123 in Warren County, Ohio. It was built in 1960 and reconstructed in 2009, so it is 65 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 45,660 vehicles a day, roughly 20% of them trucks, projected to reach 63,376 by 2035. The structure is 188 ft (57.2 m) long and 81 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesNB Ir 75
CrossesSR 123
LocationOver SR 123
RouteInterstate 75
StateOhio
Coordinates39.54304, -84.29314
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating69.3 US tons
Inventory rating53.6 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 25 or greater
Structure length188 ft (57.2 m)
Longest span57 ft (17.5 m)
Deck width81 ft (24.8 m)
Roadway width78 ft (23.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45,660 (2015)
Projected traffic63,376 by 2035
Trucks20%
Lanes on structure4
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.9 mi (3 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was NB Ir 75 over SR 123 built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 2009.

What condition is NB Ir 75 over SR 123 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 March 2023.

How much traffic does NB Ir 75 over SR 123 carry?

About 45,660 vehicles per day (2015 count), of which roughly 20% are trucks.

How long is NB Ir 75 over SR 123?

The structure is 188 ft (57.2 m) long with a longest span of 57 ft (17.5 m) and a deck 81 ft wide.

Who owns NB Ir 75 over SR 123?

It is owned by the State Highway Agency.