IRR BIA RTE 181 over Gila River
FairPinal County, Arizona · 4.8 KM North of Az 87 · Structure no. 00000000000H148
- Built
- 1961
- 64 years old, rebuilt 1996
- Condition
- Fair
- inspected January 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 140 ft
- 4 main spans
- Daily traffic
- 400
- 2023 count
- Owner
- Federal
- Bureau of Indian Affairs
About this bridge
IRR BIA RTE 181 over Gila River is a prestressed concrete stringer/multi-beam or girder carrying IRR BIA RTE 181 over Gila River in Pinal County, Arizona. It was built in 1961 and reconstructed in 1996, so it is 64 years old, older than the Arizona average of 47.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 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 400 vehicles a day, roughly 10% of them trucks, projected to reach 500 by 2043. The structure is 140 ft (42.7 m) long and 32 ft wide. If it were closed, the detour would be 9.9 mi (16 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IRR BIA RTE 181 over Gila River built?
It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1996.
What condition is IRR BIA RTE 181 over Gila River 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 January 2023.
How much traffic does IRR BIA RTE 181 over Gila River carry?
About 400 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is IRR BIA RTE 181 over Gila River?
The structure is 140 ft (42.7 m) long with a longest span of 35 ft (10.7 m) and a deck 32 ft wide.
Who owns IRR BIA RTE 181 over Gila River?
It is owned by the Bureau of Indian Affairs.