IRR BIA RTE 1 over Main Drain
PoorPosted for loadLa Paz County, Arizona · 0.7 KM N of BIA 1/10 Int. · Structure no. 00000000000H004
- Built
- 1962
- 63 years old
- Condition
- Poor
- inspected December 2021
- Type
- Stringer/Multi-beam or Girder
- Concrete
- Length
- 75 ft
- 3 main spans
- Daily traffic
- 3,000
- 2021 count
- Owner
- Federal
- Bureau of Indian Affairs
About this bridge
IRR BIA RTE 1 over Main Drain is a concrete stringer/multi-beam or girder carrying IRR BIA RTE 1 over Main Drain in La Paz County, Arizona. It was built in 1962, so it is 63 years old, older than the Arizona average of 47.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.
It carries about 3,000 vehicles a day, roughly 15% of them trucks, projected to reach 3,700 by 2039. The structure is 75 ft (23 m) long and 34 ft wide. If it were closed, the detour would be 3.1 mi (5 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IRR BIA RTE 1 over Main Drain built?
It was built in 1962, making it 63 years old in 2025.
What condition is IRR BIA RTE 1 over Main Drain in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2021.
How much traffic does IRR BIA RTE 1 over Main Drain carry?
About 3,000 vehicles per day (2021 count), of which roughly 15% are trucks.
How long is IRR BIA RTE 1 over Main Drain?
The structure is 75 ft (23 m) long with a longest span of 25 ft (7.6 m) and a deck 34 ft wide.
Who owns IRR BIA RTE 1 over Main Drain?
It is owned by the Bureau of Indian Affairs.