Irwin RD T55 over I71
GoodWarren County, Ohio · 1.6 MI N Ham-War CO Line · Structure no. 8301778
- Built
- 1964
- 61 years old
- Condition
- Good
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 317 ft
- 4 main spans
- Daily traffic
- 7,264
- 2015 count
- Owner
- State
- State Highway Agency
About this bridge
Irwin RD T55 over I71 is a steel continuous stringer/multi-beam or girder carrying Irwin RD T55 over I71 in Warren County, Ohio. It was built in 1964, so it is 61 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 7,264 vehicles a day, roughly 5% of them trucks, projected to reach 126,847 by 2035. The structure is 317 ft (96.6 m) long and 31 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Irwin RD T55 over I71 built?
It was built in 1964, making it 61 years old in 2025.
What condition is Irwin RD T55 over I71 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 September 2024.
How much traffic does Irwin RD T55 over I71 carry?
About 7,264 vehicles per day (2015 count), of which roughly 5% are trucks.
How long is Irwin RD T55 over I71?
The structure is 317 ft (96.6 m) long with a longest span of 93 ft (28.4 m) and a deck 31 ft wide.
Who owns Irwin RD T55 over I71?
It is owned by the State Highway Agency.