IRR/US-491 over Unnamed Waterway
GoodSan Juan County, New Mexico · 0.7 MI N of Naschitti · Structure no. 000000000007635
- Built
- 1975
- 50 years old, rebuilt 2013
- Condition
- Good
- inspected January 2024
- Type
- Culvert
- Steel
- Length
- 37 ft
- 1 main span
- Daily traffic
- 5,936
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
IRR/US-491 over Unnamed Waterway is a steel culvert carrying IRR/US-491 over Unnamed Waterway in San Juan County, New Mexico. It was built in 1975 and reconstructed in 2013, so it is 50 years old, younger than the New Mexico average of 51.5 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 5,936 vehicles a day, roughly 17% of them trucks, projected to reach 8,072 by 2043. The structure is 37 ft (11.4 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-491 over Unnamed Waterway built?
It was built in 1975, making it 50 years old in 2025. It was reconstructed in 2013.
What condition is IRR/US-491 over Unnamed Waterway 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 January 2024.
How much traffic does IRR/US-491 over Unnamed Waterway carry?
About 5,936 vehicles per day (2023 count), of which roughly 17% are trucks.
How long is IRR/US-491 over Unnamed Waterway?
The structure is 37 ft (11.4 m) long with a longest span of 37 ft (11.4 m).
Who owns IRR/US-491 over Unnamed Waterway?
It is owned by the State Highway Agency.