IRR BIA RTE 4 over Main Canal
FairLa Paz County, Arizona · 2.1 KM West of BIA 3 · Structure no. 00000000000H043
- Built
- 1982
- 43 years old
- Condition
- Fair
- inspected February 2024
- Type
- Slab
- Concrete Continuous
- Length
- 68 ft
- 3 main spans
- Daily traffic
- 400
- 2024 count
- Owner
- Federal
- Bureau of Indian Affairs
About this bridge
IRR BIA RTE 4 over Main Canal is a concrete continuous slab carrying IRR BIA RTE 4 over Main Canal in La Paz County, Arizona. It was built in 1982, so it is 43 years old, younger 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 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 400 vehicles a day, roughly 15% of them trucks, projected to reach 486 by 2044. The structure is 68 ft (20.7 m) long and 30 ft wide. If it were closed, the detour would be 6.8 mi (11 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IRR BIA RTE 4 over Main Canal built?
It was built in 1982, making it 43 years old in 2025.
What condition is IRR BIA RTE 4 over Main Canal 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 February 2024.
How much traffic does IRR BIA RTE 4 over Main Canal carry?
About 400 vehicles per day (2024 count), of which roughly 15% are trucks.
How long is IRR BIA RTE 4 over Main Canal?
The structure is 68 ft (20.7 m) long with a longest span of 26 ft (7.9 m) and a deck 30 ft wide.
Who owns IRR BIA RTE 4 over Main Canal?
It is owned by the Bureau of Indian Affairs.