US Bridges

SR-55 over Ir 75

Fair

Miami County, Ohio · Jct. IR-75 · Structure no. 5501350

Built
1968
57 years old, rebuilt 2002
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
248 ft
4 main spans
Daily traffic
8,933
2015 count
Owner
State
State Highway Agency

About this bridge

SR-55 over Ir 75 is a steel continuous stringer/multi-beam or girder carrying SR-55 over Ir 75 in Miami County, Ohio. It was built in 1968 and reconstructed in 2002, so it is 57 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 8,933 vehicles a day, roughly 4% of them trucks, projected to reach 12,399 by 2035. The structure is 248 ft (75.6 m) long and 55 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSR-55
CrossesIr 75
LocationJct. IR-75
RouteState Highway 55
StateOhio
Coordinates40.02515, -84.23124
Functional classUrban Minor Arterial

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 geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating42.9 US tons
Inventory rating32.2 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length248 ft (75.6 m)
Longest span76 ft (23.2 m)
Deck width55 ft (16.9 m)
Roadway width52 ft (16 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,933 (2015)
Projected traffic12,399 by 2035
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR-55 over Ir 75 built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 2002.

What condition is SR-55 over Ir 75 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-55 over Ir 75 carry?

About 8,933 vehicles per day (2015 count), of which roughly 4% are trucks.

How long is SR-55 over Ir 75?

The structure is 248 ft (75.6 m) long with a longest span of 76 ft (23.2 m) and a deck 55 ft wide.

Who owns SR-55 over Ir 75?

It is owned by the State Highway Agency.