US-491 over Malpais Arroyo
FairSan Juan County, New Mexico · US 491 Mm 102.01 · Structure no. 000000000007090
- Built
- 1969
- 56 years old
- Condition
- Fair
- inspected December 2023
- Type
- Culvert
- Concrete
- Length
- 43 ft
- 4 main spans
- Daily traffic
- 4,224
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US-491 over Malpais Arroyo is a concrete culvert carrying US-491 over Malpais Arroyo 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 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 4,224 vehicles a day, roughly 17% of them trucks, projected to reach 5,744 by 2043. The structure is 43 ft (13.1 m) long. 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 |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US-491 over Malpais Arroyo built?
It was built in 1969, making it 56 years old in 2025.
What condition is US-491 over Malpais Arroyo 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 December 2023.
How much traffic does US-491 over Malpais Arroyo carry?
About 4,224 vehicles per day (2023 count), of which roughly 17% are trucks.
How long is US-491 over Malpais Arroyo?
The structure is 43 ft (13.1 m) long with a longest span of 10 ft (3 m).
Who owns US-491 over Malpais Arroyo?
It is owned by the State Highway Agency.