NM-4 over Rio San Antonio
FairSandoval County, New Mexico · 26.4 MI N of JCT US-550 · Structure no. 000000000006856
- Built
- 1966
- 59 years old
- Condition
- Fair
- inspected August 2023
- Type
- Culvert
- Concrete
- Length
- 33 ft
- 3 main spans
- Daily traffic
- 5,364
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
NM-4 over Rio San Antonio is a concrete culvert carrying NM-4 over Rio San Antonio in Sandoval County, New Mexico. It was built in 1966, so it is 59 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 5,364 vehicles a day, roughly 11% of them trucks, projected to reach 7,295 by 2043. The structure is 33 ft (10.1 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 NM-4 over Rio San Antonio built?
It was built in 1966, making it 59 years old in 2025.
What condition is NM-4 over Rio San Antonio 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 August 2023.
How much traffic does NM-4 over Rio San Antonio carry?
About 5,364 vehicles per day (2023 count), of which roughly 11% are trucks.
How long is NM-4 over Rio San Antonio?
The structure is 33 ft (10.1 m) long with a longest span of 10 ft (3 m).
Who owns NM-4 over Rio San Antonio?
It is owned by the State Highway Agency.