IRR SR 73 over Post Office Canyon
FairNavajo County, Arizona · 8.8 MI S JCT SR 260 · Structure no. 00981
- Built
- 1967
- 58 years old, rebuilt 2022
- Condition
- Fair
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 169 ft
- 1 main span
- Daily traffic
- 7,999
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
IRR SR 73 over Post Office Canyon is a steel stringer/multi-beam or girder carrying IRR SR 73 over Post Office Canyon in Navajo County, Arizona. It was built in 1967 and reconstructed in 2022, 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 7,999 vehicles a day, roughly 4% of them trucks, projected to reach 8,009 by 2042. The structure is 169 ft (51.5 m) long and 37 ft wide. 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 |
|---|---|---|
| Deck | 8 Very Good | No problems noted. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IRR SR 73 over Post Office Canyon built?
It was built in 1967, making it 58 years old in 2025. It was reconstructed in 2022.
What condition is IRR SR 73 over Post Office Canyon 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 September 2024.
How much traffic does IRR SR 73 over Post Office Canyon carry?
About 7,999 vehicles per day (2024 count), of which roughly 4% are trucks.
How long is IRR SR 73 over Post Office Canyon?
The structure is 169 ft (51.5 m) long with a longest span of 165 ft (50.3 m) and a deck 37 ft wide.
Who owns IRR SR 73 over Post Office Canyon?
It is owned by the State Highway Agency.