NM-400 over Unnamed Waterway
GoodMcKinley County, New Mexico · 3.2 MI S of JCT I-40 · Structure no. 000000000004187
- Built
- 1930
- 95 years old, rebuilt 1975
- Condition
- Good
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 24 ft
- 1 main span
- Daily traffic
- 1,524
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
NM-400 over Unnamed Waterway is a wood or timber stringer/multi-beam or girder carrying NM-400 over Unnamed Waterway in McKinley County, New Mexico. It was built in 1930 and reconstructed in 1975, so it is 95 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 1,524 vehicles a day, roughly 11% of them trucks, projected to reach 2,072 by 2043. The structure is 24 ft (7.2 m) long and 43 ft wide. 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 |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was NM-400 over Unnamed Waterway built?
It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1975.
What condition is NM-400 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 July 2023.
How much traffic does NM-400 over Unnamed Waterway carry?
About 1,524 vehicles per day (2023 count), of which roughly 11% are trucks.
How long is NM-400 over Unnamed Waterway?
The structure is 24 ft (7.2 m) long with a longest span of 20 ft (6.2 m) and a deck 43 ft wide.
Who owns NM-400 over Unnamed Waterway?
It is owned by the State Highway Agency.