US-491 over Unnamed Waterway
GoodSan Juan County, New Mexico · US 491 Mm 107.1 · Structure no. 000000000007091
- Built
- 1969
- 56 years old
- Condition
- Good
- inspected December 2023
- Type
- Culvert
- Concrete
- Length
- 104 ft
- 12 main spans
- Daily traffic
- 4,224
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US-491 over Unnamed Waterway is a concrete culvert carrying US-491 over Unnamed Waterway in San Juan County, New Mexico. It was built in 1969, so it is 56 years old, older 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 4,224 vehicles a day, roughly 17% of them trucks, projected to reach 5,744 by 2043. The structure is 104 ft (31.7 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 US-491 over Unnamed Waterway built?
It was built in 1969, making it 56 years old in 2025.
What condition is 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 December 2023.
How much traffic does US-491 over Unnamed Waterway carry?
About 4,224 vehicles per day (2023 count), of which roughly 17% are trucks.
How long is US-491 over Unnamed Waterway?
The structure is 104 ft (31.7 m) long with a longest span of 8 ft (2.4 m).
Who owns US-491 over Unnamed Waterway?
It is owned by the State Highway Agency.