NM-4 over Unnamed Waterway
GoodLos Alamos County, New Mexico · Nm 4 Mm 61.6 · Structure no. 000000000005693
- Built
- 1954
- 71 years old
- Condition
- Good
- inspected November 2023
- Type
- Culvert
- Concrete
- Length
- 35 ft
- 4 main spans
- Daily traffic
- 1,036
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
NM-4 over Unnamed Waterway is a concrete culvert carrying NM-4 over Unnamed Waterway in Los Alamos County, New Mexico. It was built in 1954, so it is 71 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 1,036 vehicles a day, roughly 11% of them trucks, projected to reach 1,408 by 2043. The structure is 35 ft (10.6 m) long. If it were closed, the detour would be 29.8 mi (48 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 NM-4 over Unnamed Waterway built?
It was built in 1954, making it 71 years old in 2025.
What condition is NM-4 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 November 2023.
How much traffic does NM-4 over Unnamed Waterway carry?
About 1,036 vehicles per day (2023 count), of which roughly 11% are trucks.
How long is NM-4 over Unnamed Waterway?
The structure is 35 ft (10.6 m) long with a longest span of 8 ft (2.4 m).
Who owns NM-4 over Unnamed Waterway?
It is owned by the State Highway Agency.