US Bridges

IR-75 over B & O RR

Fair

Miami County, Ohio · 2.15MI. S. of Jct. USR-36 · Structure no. 5502977

Built
1958
67 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
348 ft
5 main spans
Daily traffic
22,249
2015 count
Owner
State
State Highway Agency

About this bridge

IR-75 over B & O RR is a steel continuous stringer/multi-beam or girder carrying IR-75 over B & O RR in Miami County, Ohio. It was built in 1958, so it is 67 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 6 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 22,249 vehicles a day, roughly 12% of them trucks, projected to reach 30,882 by 2035. The structure is 348 ft (106.1 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesIR-75
CrossesB & O RR
Location2.15MI. S. of Jct. USR-36
RouteInterstate 75
CountyMiami County
StateOhio
Coordinates40.1208, -84.21834
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating32.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length348 ft (106.1 m)
Longest span77 ft (23.5 m)
Deck width44 ft (13.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,249 (2015)
Projected traffic30,882 by 2035
Trucks12%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was IR-75 over B & O RR built?

It was built in 1958, making it 67 years old in 2025.

What condition is IR-75 over B & O RR 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 IR-75 over B & O RR carry?

About 22,249 vehicles per day (2015 count), of which roughly 12% are trucks.

How long is IR-75 over B & O RR?

The structure is 348 ft (106.1 m) long with a longest span of 77 ft (23.5 m) and a deck 44 ft wide.

Who owns IR-75 over B & O RR?

It is owned by the State Highway Agency.