Cosper Loop over Rocky John Canyon
FairGreenlee County, Arizona · 1.0 MI S JCT SR 75 · Structure no. 08147
- Built
- 1900
- 125 years old
- Condition
- Fair
- inspected August 2023
- Type
- Culvert
- Concrete Continuous
- Length
- 54 ft
- 5 main spans
- Daily traffic
- 42
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
Cosper Loop over Rocky John Canyon is a concrete continuous culvert carrying Cosper Loop over Rocky John Canyon in Greenlee County, Arizona. It was built in 1900, so it is 125 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 42 vehicles a day, roughly 1% of them trucks, projected to reach 52 by 2042. The structure is 54 ft (16.5 m) long. If it were closed, the detour would be 1.2 mi (2 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Cosper Loop over Rocky John Canyon built?
It was built in 1900, making it 125 years old in 2025.
What condition is Cosper Loop over Rocky John 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 August 2023.
How much traffic does Cosper Loop over Rocky John Canyon carry?
About 42 vehicles per day (2022 count), of which roughly 1% are trucks.
How long is Cosper Loop over Rocky John Canyon?
The structure is 54 ft (16.5 m) long with a longest span of 10 ft (3 m).
Who owns Cosper Loop over Rocky John Canyon?
It is owned by the County Highway Agency.