IRR US 70 over Bone Spring Canyon
GoodGraham County, Arizona · 32.6 MI E JCT SR 77 · Structure no. 04291
- Built
- 1956
- 69 years old
- Condition
- Good
- inspected May 2023
- Type
- Culvert
- Concrete Continuous
- Length
- 65 ft
- 6 main spans
- Daily traffic
- 2,911
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
IRR US 70 over Bone Spring Canyon is a concrete continuous culvert carrying IRR US 70 over Bone Spring Canyon in Graham County, Arizona. It was built in 1956, so it is 69 years old, older than the Arizona average of 47.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 2,911 vehicles a day, roughly 24% of them trucks, projected to reach 2,921 by 2041. The structure is 65 ft (19.8 m) long. If it were closed, the detour would be 98.8 mi (159 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IRR US 70 over Bone Spring Canyon built?
It was built in 1956, making it 69 years old in 2025.
What condition is IRR US 70 over Bone Spring Canyon in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.
How much traffic does IRR US 70 over Bone Spring Canyon carry?
About 2,911 vehicles per day (2021 count), of which roughly 24% are trucks.
How long is IRR US 70 over Bone Spring Canyon?
The structure is 65 ft (19.8 m) long with a longest span of 10 ft (3 m).
Who owns IRR US 70 over Bone Spring Canyon?
It is owned by the State Highway Agency.