IRR SR 73 over Round Top Wash
FairNavajo County, Arizona · 36.9 MI E JCT US 60 · Structure no. 04351
- Built
- 1967
- 58 years old
- Condition
- Fair
- inspected October 2024
- Type
- Culvert
- Concrete Continuous
- Length
- 24 ft
- 2 main spans
- Daily traffic
- 5,434
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
IRR SR 73 over Round Top Wash is a concrete continuous culvert carrying IRR SR 73 over Round Top Wash in Navajo County, Arizona. It was built in 1967, so it is 58 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 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 5,434 vehicles a day, roughly 5% of them trucks, projected to reach 5,444 by 2042. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 42.9 mi (69 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 |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IRR SR 73 over Round Top Wash built?
It was built in 1967, making it 58 years old in 2025.
What condition is IRR SR 73 over Round Top Wash 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 October 2024.
How much traffic does IRR SR 73 over Round Top Wash carry?
About 5,434 vehicles per day (2022 count), of which roughly 5% are trucks.
How long is IRR SR 73 over Round Top Wash?
The structure is 24 ft (7.3 m) long with a longest span of 10 ft (3 m).
Who owns IRR SR 73 over Round Top Wash?
It is owned by the State Highway Agency.