US-491 over Pena Blanca Wash
FairSan Juan County, New Mexico · 23.6 Misouth JCT US 64/49 · Structure no. 000000000008211
- Built
- 1981
- 44 years old
- Condition
- Fair
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 131 ft
- 2 main spans
- Daily traffic
- 7,932
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US-491 over Pena Blanca Wash is a prestressed concrete continuous stringer/multi-beam or girder carrying US-491 over Pena Blanca Wash in San Juan County, New Mexico. It was built in 1981, so it is 44 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 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 7,932 vehicles a day, roughly 17% of them trucks, projected to reach 10,787 by 2043. The structure is 131 ft (39.8 m) long and 49 ft wide. If it were closed, the detour would be 98.8 mi (159 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 |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US-491 over Pena Blanca Wash built?
It was built in 1981, making it 44 years old in 2025.
What condition is US-491 over Pena Blanca Wash 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 September 2024.
How much traffic does US-491 over Pena Blanca Wash carry?
About 7,932 vehicles per day (2023 count), of which roughly 17% are trucks.
How long is US-491 over Pena Blanca Wash?
The structure is 131 ft (39.8 m) long with a longest span of 64 ft (19.5 m) and a deck 49 ft wide.
Who owns US-491 over Pena Blanca Wash?
It is owned by the State Highway Agency.