IRR/US-491 over Unnamed Waterway
GoodSan Juan County, New Mexico · 0.6 MI N of NM-134 · Structure no. 000000000007866
- Built
- 1976
- 49 years old
- Condition
- Good
- inspected January 2022
- Type
- Culvert
- Concrete
- Length
- 29 ft
- 2 main spans
- Daily traffic
- 6,055
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
IRR/US-491 over Unnamed Waterway is a concrete culvert carrying IRR/US-491 over Unnamed Waterway in San Juan County, New Mexico. It was built in 1976, so it is 49 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 6,055 vehicles a day, roughly 17% of them trucks, projected to reach 8,234 by 2043. The structure is 29 ft (8.8 m) long. If it were closed, the detour would be 98.2 mi (158 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 1976, making it 49 years old in 2025.
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 2022.
How much traffic does IRR/US-491 over Unnamed Waterway carry?
About 6,055 vehicles per day (2023 count), of which roughly 17% are trucks.
How long is IRR/US-491 over Unnamed Waterway?
The structure is 29 ft (8.8 m) long with a longest span of 10 ft (3 m).
Who owns IRR/US-491 over Unnamed Waterway?
It is owned by the State Highway Agency.